2017-11-18 17:09:20 +01:00
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/* SPDX-License-Identifier: LGPL-2.1+ */
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2016-03-17 18:26:13 +01:00
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#pragma once
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/* Missing glibc definitions to access certain kernel APIs */
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2019-01-11 17:24:21 +01:00
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#include <errno.h>
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2018-12-04 08:26:09 +01:00
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#include <fcntl.h>
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2019-10-25 16:06:06 +02:00
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#include <signal.h>
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2018-12-04 08:26:09 +01:00
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#include <sys/syscall.h>
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2016-10-18 17:57:10 +02:00
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#include <sys/types.h>
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2019-10-25 16:06:06 +02:00
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#include <sys/wait.h>
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2018-12-06 06:32:41 +01:00
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#include <unistd.h>
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#ifdef ARCH_MIPS
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#include <asm/sgidefs.h>
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#endif
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2016-10-18 17:57:10 +02:00
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2018-12-04 07:41:15 +01:00
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#include "missing_keyctl.h"
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2018-12-04 07:56:19 +01:00
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#include "missing_stat.h"
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2018-12-04 07:41:15 +01:00
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2018-12-06 06:32:41 +01:00
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/* linux/kcmp.h */
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#ifndef KCMP_FILE /* 3f4994cfc15f38a3159c6e3a4b3ab2e1481a6b02 (3.19) */
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#define KCMP_FILE 0
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#endif
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2017-10-03 10:32:34 +02:00
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#if !HAVE_PIVOT_ROOT
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missing_syscall: when adding syscall replacements, use different names (#8229)
In meson.build we check that functions are available using:
meson.get_compiler('c').has_function('foo')
which checks the following:
- if __stub_foo or __stub___foo are defined, return false
- if foo is declared (a pointer to the function can be taken), return true
- otherwise check for __builtin_memfd_create
_stub is documented by glibc as
It defines a symbol '__stub_FUNCTION' for each function
in the C library which is a stub, meaning it will fail
every time called, usually setting errno to ENOSYS.
So if __stub is defined, we know we don't want to use the glibc version, but
this doesn't tell us if the name itself is defined or not. If it _is_ defined,
and we define our replacement as an inline static function, we get an error:
In file included from ../src/basic/missing.h:1358:0,
from ../src/basic/util.h:47,
from ../src/basic/calendarspec.h:29,
from ../src/basic/calendarspec.c:34:
../src/basic/missing_syscall.h:65:19: error: static declaration of 'memfd_create' follows non-static declaration
static inline int memfd_create(const char *name, unsigned int flags) {
^~~~~~~~~~~~
.../usr/include/bits/mman-shared.h:46:5: note: previous declaration of 'memfd_create' was here
int memfd_create (const char *__name, unsigned int __flags) __THROW;
^~~~~~~~~~~~
To avoid this problem, call our inline functions different than glibc,
and use a #define to map the official name to our replacement.
Fixes #8099.
v2:
- use "missing_" as the prefix instead of "_"
v3:
- rebase and update for statx()
Unfortunately "statx" is also present in "struct statx", so the define
causes issues. Work around this by using a typedef.
I checked that systemd compiles with current glibc
(glibc-devel-2.26-24.fc27.x86_64) if HAVE_MEMFD_CREATE, HAVE_GETTID,
HAVE_PIVOT_ROOT, HAVE_SETNS, HAVE_RENAMEAT2, HAVE_KCMP, HAVE_KEYCTL,
HAVE_COPY_FILE_RANGE, HAVE_BPF, HAVE_STATX are forced to 0.
Setting HAVE_NAME_TO_HANDLE_AT to 0 causes an issue, but it's not because of
the define, but because of struct file_handle.
2018-02-21 14:04:50 +01:00
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static inline int missing_pivot_root(const char *new_root, const char *put_old) {
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2018-02-21 17:27:34 +01:00
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return syscall(__NR_pivot_root, new_root, put_old);
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2016-03-17 18:26:13 +01:00
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}
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missing_syscall: when adding syscall replacements, use different names (#8229)
In meson.build we check that functions are available using:
meson.get_compiler('c').has_function('foo')
which checks the following:
- if __stub_foo or __stub___foo are defined, return false
- if foo is declared (a pointer to the function can be taken), return true
- otherwise check for __builtin_memfd_create
_stub is documented by glibc as
It defines a symbol '__stub_FUNCTION' for each function
in the C library which is a stub, meaning it will fail
every time called, usually setting errno to ENOSYS.
So if __stub is defined, we know we don't want to use the glibc version, but
this doesn't tell us if the name itself is defined or not. If it _is_ defined,
and we define our replacement as an inline static function, we get an error:
In file included from ../src/basic/missing.h:1358:0,
from ../src/basic/util.h:47,
from ../src/basic/calendarspec.h:29,
from ../src/basic/calendarspec.c:34:
../src/basic/missing_syscall.h:65:19: error: static declaration of 'memfd_create' follows non-static declaration
static inline int memfd_create(const char *name, unsigned int flags) {
^~~~~~~~~~~~
.../usr/include/bits/mman-shared.h:46:5: note: previous declaration of 'memfd_create' was here
int memfd_create (const char *__name, unsigned int __flags) __THROW;
^~~~~~~~~~~~
To avoid this problem, call our inline functions different than glibc,
and use a #define to map the official name to our replacement.
Fixes #8099.
v2:
- use "missing_" as the prefix instead of "_"
v3:
- rebase and update for statx()
Unfortunately "statx" is also present in "struct statx", so the define
causes issues. Work around this by using a typedef.
I checked that systemd compiles with current glibc
(glibc-devel-2.26-24.fc27.x86_64) if HAVE_MEMFD_CREATE, HAVE_GETTID,
HAVE_PIVOT_ROOT, HAVE_SETNS, HAVE_RENAMEAT2, HAVE_KCMP, HAVE_KEYCTL,
HAVE_COPY_FILE_RANGE, HAVE_BPF, HAVE_STATX are forced to 0.
Setting HAVE_NAME_TO_HANDLE_AT to 0 causes an issue, but it's not because of
the define, but because of struct file_handle.
2018-02-21 14:04:50 +01:00
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# define pivot_root missing_pivot_root
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2016-03-17 18:26:13 +01:00
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#endif
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/* ======================================================================= */
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2020-08-18 09:22:20 +02:00
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#if defined __x86_64__
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# define systemd_NR_memfd_create 319
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#elif defined __arm__
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# define systemd_NR_memfd_create 385
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#elif defined __aarch64__
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# define systemd_NR_memfd_create 279
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2020-08-22 16:38:29 +02:00
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#elif defined(__powerpc__)
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# define systemd_NR_memfd_create 360
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2020-08-18 09:22:20 +02:00
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#elif defined __s390__
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# define systemd_NR_memfd_create 350
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#elif defined _MIPS_SIM
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# if _MIPS_SIM == _MIPS_SIM_ABI32
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# define systemd_NR_memfd_create 4354
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# endif
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# if _MIPS_SIM == _MIPS_SIM_NABI32
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# define systemd_NR_memfd_create 6318
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# endif
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# if _MIPS_SIM == _MIPS_SIM_ABI64
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# define systemd_NR_memfd_create 5314
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# endif
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#elif defined __i386__
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# define systemd_NR_memfd_create 356
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#elif defined __arc__
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# define systemd_NR_memfd_create 279
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#else
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# warning "memfd_create() syscall number unknown for your architecture"
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#endif
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2019-08-15 03:08:36 +02:00
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/* may be (invalid) negative number due to libseccomp, see PR 13319 */
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2020-08-18 09:22:20 +02:00
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#if defined __NR_memfd_create && __NR_memfd_create >= 0
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# if defined systemd_NR_memfd_create
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assert_cc(__NR_memfd_create == systemd_NR_memfd_create);
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# endif
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#else
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# if defined __NR_memfd_create
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# undef __NR_memfd_create
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# endif
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# if defined systemd_NR_memfd_create
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# define __NR_memfd_create systemd_NR_memfd_create
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2016-03-17 18:26:13 +01:00
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# endif
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2020-08-18 09:22:20 +02:00
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#endif
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2016-03-17 18:26:13 +01:00
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2020-08-18 09:22:20 +02:00
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#if !HAVE_MEMFD_CREATE
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missing_syscall: when adding syscall replacements, use different names (#8229)
In meson.build we check that functions are available using:
meson.get_compiler('c').has_function('foo')
which checks the following:
- if __stub_foo or __stub___foo are defined, return false
- if foo is declared (a pointer to the function can be taken), return true
- otherwise check for __builtin_memfd_create
_stub is documented by glibc as
It defines a symbol '__stub_FUNCTION' for each function
in the C library which is a stub, meaning it will fail
every time called, usually setting errno to ENOSYS.
So if __stub is defined, we know we don't want to use the glibc version, but
this doesn't tell us if the name itself is defined or not. If it _is_ defined,
and we define our replacement as an inline static function, we get an error:
In file included from ../src/basic/missing.h:1358:0,
from ../src/basic/util.h:47,
from ../src/basic/calendarspec.h:29,
from ../src/basic/calendarspec.c:34:
../src/basic/missing_syscall.h:65:19: error: static declaration of 'memfd_create' follows non-static declaration
static inline int memfd_create(const char *name, unsigned int flags) {
^~~~~~~~~~~~
.../usr/include/bits/mman-shared.h:46:5: note: previous declaration of 'memfd_create' was here
int memfd_create (const char *__name, unsigned int __flags) __THROW;
^~~~~~~~~~~~
To avoid this problem, call our inline functions different than glibc,
and use a #define to map the official name to our replacement.
Fixes #8099.
v2:
- use "missing_" as the prefix instead of "_"
v3:
- rebase and update for statx()
Unfortunately "statx" is also present in "struct statx", so the define
causes issues. Work around this by using a typedef.
I checked that systemd compiles with current glibc
(glibc-devel-2.26-24.fc27.x86_64) if HAVE_MEMFD_CREATE, HAVE_GETTID,
HAVE_PIVOT_ROOT, HAVE_SETNS, HAVE_RENAMEAT2, HAVE_KCMP, HAVE_KEYCTL,
HAVE_COPY_FILE_RANGE, HAVE_BPF, HAVE_STATX are forced to 0.
Setting HAVE_NAME_TO_HANDLE_AT to 0 causes an issue, but it's not because of
the define, but because of struct file_handle.
2018-02-21 14:04:50 +01:00
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static inline int missing_memfd_create(const char *name, unsigned int flags) {
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2016-03-17 18:26:13 +01:00
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# ifdef __NR_memfd_create
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return syscall(__NR_memfd_create, name, flags);
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# else
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errno = ENOSYS;
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return -1;
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# endif
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}
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missing_syscall: when adding syscall replacements, use different names (#8229)
In meson.build we check that functions are available using:
meson.get_compiler('c').has_function('foo')
which checks the following:
- if __stub_foo or __stub___foo are defined, return false
- if foo is declared (a pointer to the function can be taken), return true
- otherwise check for __builtin_memfd_create
_stub is documented by glibc as
It defines a symbol '__stub_FUNCTION' for each function
in the C library which is a stub, meaning it will fail
every time called, usually setting errno to ENOSYS.
So if __stub is defined, we know we don't want to use the glibc version, but
this doesn't tell us if the name itself is defined or not. If it _is_ defined,
and we define our replacement as an inline static function, we get an error:
In file included from ../src/basic/missing.h:1358:0,
from ../src/basic/util.h:47,
from ../src/basic/calendarspec.h:29,
from ../src/basic/calendarspec.c:34:
../src/basic/missing_syscall.h:65:19: error: static declaration of 'memfd_create' follows non-static declaration
static inline int memfd_create(const char *name, unsigned int flags) {
^~~~~~~~~~~~
.../usr/include/bits/mman-shared.h:46:5: note: previous declaration of 'memfd_create' was here
int memfd_create (const char *__name, unsigned int __flags) __THROW;
^~~~~~~~~~~~
To avoid this problem, call our inline functions different than glibc,
and use a #define to map the official name to our replacement.
Fixes #8099.
v2:
- use "missing_" as the prefix instead of "_"
v3:
- rebase and update for statx()
Unfortunately "statx" is also present in "struct statx", so the define
causes issues. Work around this by using a typedef.
I checked that systemd compiles with current glibc
(glibc-devel-2.26-24.fc27.x86_64) if HAVE_MEMFD_CREATE, HAVE_GETTID,
HAVE_PIVOT_ROOT, HAVE_SETNS, HAVE_RENAMEAT2, HAVE_KCMP, HAVE_KEYCTL,
HAVE_COPY_FILE_RANGE, HAVE_BPF, HAVE_STATX are forced to 0.
Setting HAVE_NAME_TO_HANDLE_AT to 0 causes an issue, but it's not because of
the define, but because of struct file_handle.
2018-02-21 14:04:50 +01:00
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# define memfd_create missing_memfd_create
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2016-03-17 18:26:13 +01:00
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#endif
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/* ======================================================================= */
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2020-08-18 09:22:20 +02:00
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#if defined __x86_64__
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# define systemd_NR_getrandom 318
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#elif defined(__i386__)
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# define systemd_NR_getrandom 355
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#elif defined(__arm__)
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# define systemd_NR_getrandom 384
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#elif defined(__aarch64__)
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# define systemd_NR_getrandom 278
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#elif defined(__ia64__)
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# define systemd_NR_getrandom 1339
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#elif defined(__m68k__)
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# define systemd_NR_getrandom 352
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#elif defined(__s390x__)
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# define systemd_NR_getrandom 349
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#elif defined(__powerpc__)
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# define systemd_NR_getrandom 359
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#elif defined _MIPS_SIM
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# if _MIPS_SIM == _MIPS_SIM_ABI32
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# define systemd_NR_getrandom 4353
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# endif
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# if _MIPS_SIM == _MIPS_SIM_NABI32
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# define systemd_NR_getrandom 6317
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# endif
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# if _MIPS_SIM == _MIPS_SIM_ABI64
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# define systemd_NR_getrandom 5313
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# endif
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#elif defined(__arc__)
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# define systemd_NR_getrandom 278
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#else
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# warning "getrandom() syscall number unknown for your architecture"
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#endif
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2019-08-15 03:08:36 +02:00
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/* may be (invalid) negative number due to libseccomp, see PR 13319 */
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2020-08-18 09:22:20 +02:00
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#if defined __NR_getrandom && __NR_getrandom >= 0
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# if defined systemd_NR_getrandom
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assert_cc(__NR_getrandom == systemd_NR_getrandom);
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# endif
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#else
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# if defined __NR_getrandom
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# undef __NR_getrandom
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2016-03-17 18:26:13 +01:00
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# endif
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2020-08-18 09:22:20 +02:00
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# if defined systemd_NR_getrandom
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# define __NR_getrandom systemd_NR_getrandom
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# endif
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#endif
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2016-03-17 18:26:13 +01:00
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2020-08-18 09:22:20 +02:00
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#if !HAVE_GETRANDOM
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missing_syscall: when adding syscall replacements, use different names (#8229)
In meson.build we check that functions are available using:
meson.get_compiler('c').has_function('foo')
which checks the following:
- if __stub_foo or __stub___foo are defined, return false
- if foo is declared (a pointer to the function can be taken), return true
- otherwise check for __builtin_memfd_create
_stub is documented by glibc as
It defines a symbol '__stub_FUNCTION' for each function
in the C library which is a stub, meaning it will fail
every time called, usually setting errno to ENOSYS.
So if __stub is defined, we know we don't want to use the glibc version, but
this doesn't tell us if the name itself is defined or not. If it _is_ defined,
and we define our replacement as an inline static function, we get an error:
In file included from ../src/basic/missing.h:1358:0,
from ../src/basic/util.h:47,
from ../src/basic/calendarspec.h:29,
from ../src/basic/calendarspec.c:34:
../src/basic/missing_syscall.h:65:19: error: static declaration of 'memfd_create' follows non-static declaration
static inline int memfd_create(const char *name, unsigned int flags) {
^~~~~~~~~~~~
.../usr/include/bits/mman-shared.h:46:5: note: previous declaration of 'memfd_create' was here
int memfd_create (const char *__name, unsigned int __flags) __THROW;
^~~~~~~~~~~~
To avoid this problem, call our inline functions different than glibc,
and use a #define to map the official name to our replacement.
Fixes #8099.
v2:
- use "missing_" as the prefix instead of "_"
v3:
- rebase and update for statx()
Unfortunately "statx" is also present in "struct statx", so the define
causes issues. Work around this by using a typedef.
I checked that systemd compiles with current glibc
(glibc-devel-2.26-24.fc27.x86_64) if HAVE_MEMFD_CREATE, HAVE_GETTID,
HAVE_PIVOT_ROOT, HAVE_SETNS, HAVE_RENAMEAT2, HAVE_KCMP, HAVE_KEYCTL,
HAVE_COPY_FILE_RANGE, HAVE_BPF, HAVE_STATX are forced to 0.
Setting HAVE_NAME_TO_HANDLE_AT to 0 causes an issue, but it's not because of
the define, but because of struct file_handle.
2018-02-21 14:04:50 +01:00
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static inline int missing_getrandom(void *buffer, size_t count, unsigned flags) {
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2016-03-17 18:26:13 +01:00
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# ifdef __NR_getrandom
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return syscall(__NR_getrandom, buffer, count, flags);
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# else
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errno = ENOSYS;
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return -1;
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# endif
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}
|
missing_syscall: when adding syscall replacements, use different names (#8229)
In meson.build we check that functions are available using:
meson.get_compiler('c').has_function('foo')
which checks the following:
- if __stub_foo or __stub___foo are defined, return false
- if foo is declared (a pointer to the function can be taken), return true
- otherwise check for __builtin_memfd_create
_stub is documented by glibc as
It defines a symbol '__stub_FUNCTION' for each function
in the C library which is a stub, meaning it will fail
every time called, usually setting errno to ENOSYS.
So if __stub is defined, we know we don't want to use the glibc version, but
this doesn't tell us if the name itself is defined or not. If it _is_ defined,
and we define our replacement as an inline static function, we get an error:
In file included from ../src/basic/missing.h:1358:0,
from ../src/basic/util.h:47,
from ../src/basic/calendarspec.h:29,
from ../src/basic/calendarspec.c:34:
../src/basic/missing_syscall.h:65:19: error: static declaration of 'memfd_create' follows non-static declaration
static inline int memfd_create(const char *name, unsigned int flags) {
^~~~~~~~~~~~
.../usr/include/bits/mman-shared.h:46:5: note: previous declaration of 'memfd_create' was here
int memfd_create (const char *__name, unsigned int __flags) __THROW;
^~~~~~~~~~~~
To avoid this problem, call our inline functions different than glibc,
and use a #define to map the official name to our replacement.
Fixes #8099.
v2:
- use "missing_" as the prefix instead of "_"
v3:
- rebase and update for statx()
Unfortunately "statx" is also present in "struct statx", so the define
causes issues. Work around this by using a typedef.
I checked that systemd compiles with current glibc
(glibc-devel-2.26-24.fc27.x86_64) if HAVE_MEMFD_CREATE, HAVE_GETTID,
HAVE_PIVOT_ROOT, HAVE_SETNS, HAVE_RENAMEAT2, HAVE_KCMP, HAVE_KEYCTL,
HAVE_COPY_FILE_RANGE, HAVE_BPF, HAVE_STATX are forced to 0.
Setting HAVE_NAME_TO_HANDLE_AT to 0 causes an issue, but it's not because of
the define, but because of struct file_handle.
2018-02-21 14:04:50 +01:00
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# define getrandom missing_getrandom
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2016-03-17 18:26:13 +01:00
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#endif
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/* ======================================================================= */
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2020-08-18 09:22:20 +02:00
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/* The syscall has been defined since forever, but the glibc wrapper was missing. */
|
2017-10-03 10:32:34 +02:00
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#if !HAVE_GETTID
|
missing_syscall: when adding syscall replacements, use different names (#8229)
In meson.build we check that functions are available using:
meson.get_compiler('c').has_function('foo')
which checks the following:
- if __stub_foo or __stub___foo are defined, return false
- if foo is declared (a pointer to the function can be taken), return true
- otherwise check for __builtin_memfd_create
_stub is documented by glibc as
It defines a symbol '__stub_FUNCTION' for each function
in the C library which is a stub, meaning it will fail
every time called, usually setting errno to ENOSYS.
So if __stub is defined, we know we don't want to use the glibc version, but
this doesn't tell us if the name itself is defined or not. If it _is_ defined,
and we define our replacement as an inline static function, we get an error:
In file included from ../src/basic/missing.h:1358:0,
from ../src/basic/util.h:47,
from ../src/basic/calendarspec.h:29,
from ../src/basic/calendarspec.c:34:
../src/basic/missing_syscall.h:65:19: error: static declaration of 'memfd_create' follows non-static declaration
static inline int memfd_create(const char *name, unsigned int flags) {
^~~~~~~~~~~~
.../usr/include/bits/mman-shared.h:46:5: note: previous declaration of 'memfd_create' was here
int memfd_create (const char *__name, unsigned int __flags) __THROW;
^~~~~~~~~~~~
To avoid this problem, call our inline functions different than glibc,
and use a #define to map the official name to our replacement.
Fixes #8099.
v2:
- use "missing_" as the prefix instead of "_"
v3:
- rebase and update for statx()
Unfortunately "statx" is also present in "struct statx", so the define
causes issues. Work around this by using a typedef.
I checked that systemd compiles with current glibc
(glibc-devel-2.26-24.fc27.x86_64) if HAVE_MEMFD_CREATE, HAVE_GETTID,
HAVE_PIVOT_ROOT, HAVE_SETNS, HAVE_RENAMEAT2, HAVE_KCMP, HAVE_KEYCTL,
HAVE_COPY_FILE_RANGE, HAVE_BPF, HAVE_STATX are forced to 0.
Setting HAVE_NAME_TO_HANDLE_AT to 0 causes an issue, but it's not because of
the define, but because of struct file_handle.
2018-02-21 14:04:50 +01:00
|
|
|
static inline pid_t missing_gettid(void) {
|
2020-08-18 09:22:20 +02:00
|
|
|
# if defined __NR_gettid && __NR_gettid >= 0
|
2018-02-21 17:27:34 +01:00
|
|
|
return (pid_t) syscall(__NR_gettid);
|
2020-08-18 09:22:20 +02:00
|
|
|
# else
|
|
|
|
# error "__NR_gettid not defined"
|
|
|
|
# endif
|
2016-03-17 18:26:13 +01:00
|
|
|
}
|
missing_syscall: when adding syscall replacements, use different names (#8229)
In meson.build we check that functions are available using:
meson.get_compiler('c').has_function('foo')
which checks the following:
- if __stub_foo or __stub___foo are defined, return false
- if foo is declared (a pointer to the function can be taken), return true
- otherwise check for __builtin_memfd_create
_stub is documented by glibc as
It defines a symbol '__stub_FUNCTION' for each function
in the C library which is a stub, meaning it will fail
every time called, usually setting errno to ENOSYS.
So if __stub is defined, we know we don't want to use the glibc version, but
this doesn't tell us if the name itself is defined or not. If it _is_ defined,
and we define our replacement as an inline static function, we get an error:
In file included from ../src/basic/missing.h:1358:0,
from ../src/basic/util.h:47,
from ../src/basic/calendarspec.h:29,
from ../src/basic/calendarspec.c:34:
../src/basic/missing_syscall.h:65:19: error: static declaration of 'memfd_create' follows non-static declaration
static inline int memfd_create(const char *name, unsigned int flags) {
^~~~~~~~~~~~
.../usr/include/bits/mman-shared.h:46:5: note: previous declaration of 'memfd_create' was here
int memfd_create (const char *__name, unsigned int __flags) __THROW;
^~~~~~~~~~~~
To avoid this problem, call our inline functions different than glibc,
and use a #define to map the official name to our replacement.
Fixes #8099.
v2:
- use "missing_" as the prefix instead of "_"
v3:
- rebase and update for statx()
Unfortunately "statx" is also present in "struct statx", so the define
causes issues. Work around this by using a typedef.
I checked that systemd compiles with current glibc
(glibc-devel-2.26-24.fc27.x86_64) if HAVE_MEMFD_CREATE, HAVE_GETTID,
HAVE_PIVOT_ROOT, HAVE_SETNS, HAVE_RENAMEAT2, HAVE_KCMP, HAVE_KEYCTL,
HAVE_COPY_FILE_RANGE, HAVE_BPF, HAVE_STATX are forced to 0.
Setting HAVE_NAME_TO_HANDLE_AT to 0 causes an issue, but it's not because of
the define, but because of struct file_handle.
2018-02-21 14:04:50 +01:00
|
|
|
|
|
|
|
# define gettid missing_gettid
|
2016-03-17 18:26:13 +01:00
|
|
|
#endif
|
|
|
|
|
|
|
|
/* ======================================================================= */
|
|
|
|
|
2020-08-18 09:22:20 +02:00
|
|
|
#if defined(__x86_64__)
|
|
|
|
# define systemd_NR_name_to_handle_at 303
|
|
|
|
#elif defined(__i386__)
|
|
|
|
# define systemd_NR_name_to_handle_at 341
|
|
|
|
#elif defined(__arm__)
|
|
|
|
# define systemd_NR_name_to_handle_at 370
|
2020-08-22 16:38:29 +02:00
|
|
|
#elif defined __aarch64__
|
|
|
|
# define systemd_NR_name_to_handle_at 264
|
2020-08-18 09:22:20 +02:00
|
|
|
#elif defined(__powerpc__)
|
|
|
|
# define systemd_NR_name_to_handle_at 345
|
2020-08-22 16:38:29 +02:00
|
|
|
#elif defined __s390__ || defined __s390x__
|
|
|
|
# define systemd_NR_name_to_handle_at 335
|
2020-08-18 09:22:20 +02:00
|
|
|
#elif defined(__arc__)
|
|
|
|
# define systemd_NR_name_to_handle_at 264
|
|
|
|
#else
|
|
|
|
# warning "name_to_handle_at number is not defined"
|
|
|
|
#endif
|
|
|
|
|
2019-08-15 03:08:36 +02:00
|
|
|
/* may be (invalid) negative number due to libseccomp, see PR 13319 */
|
2020-08-18 09:22:20 +02:00
|
|
|
#if defined __NR_name_to_handle_at && __NR_name_to_handle_at >= 0
|
|
|
|
# if defined systemd_NR_name_to_handle_at
|
|
|
|
assert_cc(__NR_name_to_handle_at == systemd_NR_name_to_handle_at);
|
|
|
|
# endif
|
|
|
|
#else
|
|
|
|
# if defined __NR_name_to_handle_at
|
|
|
|
# undef __NR_name_to_handle_at
|
|
|
|
# endif
|
|
|
|
# if defined systemd_NR_name_to_handle_at
|
|
|
|
# define __NR_name_to_handle_at systemd_NR_name_to_handle_at
|
2016-03-17 18:26:13 +01:00
|
|
|
# endif
|
2020-08-18 09:22:20 +02:00
|
|
|
#endif
|
2016-03-17 18:26:13 +01:00
|
|
|
|
2020-08-18 09:22:20 +02:00
|
|
|
#if !HAVE_NAME_TO_HANDLE_AT
|
2016-03-17 18:26:13 +01:00
|
|
|
struct file_handle {
|
|
|
|
unsigned int handle_bytes;
|
|
|
|
int handle_type;
|
|
|
|
unsigned char f_handle[0];
|
|
|
|
};
|
|
|
|
|
missing_syscall: when adding syscall replacements, use different names (#8229)
In meson.build we check that functions are available using:
meson.get_compiler('c').has_function('foo')
which checks the following:
- if __stub_foo or __stub___foo are defined, return false
- if foo is declared (a pointer to the function can be taken), return true
- otherwise check for __builtin_memfd_create
_stub is documented by glibc as
It defines a symbol '__stub_FUNCTION' for each function
in the C library which is a stub, meaning it will fail
every time called, usually setting errno to ENOSYS.
So if __stub is defined, we know we don't want to use the glibc version, but
this doesn't tell us if the name itself is defined or not. If it _is_ defined,
and we define our replacement as an inline static function, we get an error:
In file included from ../src/basic/missing.h:1358:0,
from ../src/basic/util.h:47,
from ../src/basic/calendarspec.h:29,
from ../src/basic/calendarspec.c:34:
../src/basic/missing_syscall.h:65:19: error: static declaration of 'memfd_create' follows non-static declaration
static inline int memfd_create(const char *name, unsigned int flags) {
^~~~~~~~~~~~
.../usr/include/bits/mman-shared.h:46:5: note: previous declaration of 'memfd_create' was here
int memfd_create (const char *__name, unsigned int __flags) __THROW;
^~~~~~~~~~~~
To avoid this problem, call our inline functions different than glibc,
and use a #define to map the official name to our replacement.
Fixes #8099.
v2:
- use "missing_" as the prefix instead of "_"
v3:
- rebase and update for statx()
Unfortunately "statx" is also present in "struct statx", so the define
causes issues. Work around this by using a typedef.
I checked that systemd compiles with current glibc
(glibc-devel-2.26-24.fc27.x86_64) if HAVE_MEMFD_CREATE, HAVE_GETTID,
HAVE_PIVOT_ROOT, HAVE_SETNS, HAVE_RENAMEAT2, HAVE_KCMP, HAVE_KEYCTL,
HAVE_COPY_FILE_RANGE, HAVE_BPF, HAVE_STATX are forced to 0.
Setting HAVE_NAME_TO_HANDLE_AT to 0 causes an issue, but it's not because of
the define, but because of struct file_handle.
2018-02-21 14:04:50 +01:00
|
|
|
static inline int missing_name_to_handle_at(int fd, const char *name, struct file_handle *handle, int *mnt_id, int flags) {
|
2016-03-17 18:26:13 +01:00
|
|
|
# ifdef __NR_name_to_handle_at
|
|
|
|
return syscall(__NR_name_to_handle_at, fd, name, handle, mnt_id, flags);
|
|
|
|
# else
|
|
|
|
errno = ENOSYS;
|
|
|
|
return -1;
|
|
|
|
# endif
|
|
|
|
}
|
missing_syscall: when adding syscall replacements, use different names (#8229)
In meson.build we check that functions are available using:
meson.get_compiler('c').has_function('foo')
which checks the following:
- if __stub_foo or __stub___foo are defined, return false
- if foo is declared (a pointer to the function can be taken), return true
- otherwise check for __builtin_memfd_create
_stub is documented by glibc as
It defines a symbol '__stub_FUNCTION' for each function
in the C library which is a stub, meaning it will fail
every time called, usually setting errno to ENOSYS.
So if __stub is defined, we know we don't want to use the glibc version, but
this doesn't tell us if the name itself is defined or not. If it _is_ defined,
and we define our replacement as an inline static function, we get an error:
In file included from ../src/basic/missing.h:1358:0,
from ../src/basic/util.h:47,
from ../src/basic/calendarspec.h:29,
from ../src/basic/calendarspec.c:34:
../src/basic/missing_syscall.h:65:19: error: static declaration of 'memfd_create' follows non-static declaration
static inline int memfd_create(const char *name, unsigned int flags) {
^~~~~~~~~~~~
.../usr/include/bits/mman-shared.h:46:5: note: previous declaration of 'memfd_create' was here
int memfd_create (const char *__name, unsigned int __flags) __THROW;
^~~~~~~~~~~~
To avoid this problem, call our inline functions different than glibc,
and use a #define to map the official name to our replacement.
Fixes #8099.
v2:
- use "missing_" as the prefix instead of "_"
v3:
- rebase and update for statx()
Unfortunately "statx" is also present in "struct statx", so the define
causes issues. Work around this by using a typedef.
I checked that systemd compiles with current glibc
(glibc-devel-2.26-24.fc27.x86_64) if HAVE_MEMFD_CREATE, HAVE_GETTID,
HAVE_PIVOT_ROOT, HAVE_SETNS, HAVE_RENAMEAT2, HAVE_KCMP, HAVE_KEYCTL,
HAVE_COPY_FILE_RANGE, HAVE_BPF, HAVE_STATX are forced to 0.
Setting HAVE_NAME_TO_HANDLE_AT to 0 causes an issue, but it's not because of
the define, but because of struct file_handle.
2018-02-21 14:04:50 +01:00
|
|
|
|
|
|
|
# define name_to_handle_at missing_name_to_handle_at
|
2016-03-17 18:26:13 +01:00
|
|
|
#endif
|
|
|
|
|
|
|
|
/* ======================================================================= */
|
|
|
|
|
2020-08-22 16:38:29 +02:00
|
|
|
#if defined __aarch64__
|
|
|
|
# define systemd_NR_setns 268
|
|
|
|
#elif defined __arm__
|
|
|
|
# define systemd_NR_setns 375
|
|
|
|
#elif defined(__x86_64__)
|
2020-08-18 09:22:20 +02:00
|
|
|
# define systemd_NR_setns 308
|
|
|
|
#elif defined(__i386__)
|
|
|
|
# define systemd_NR_setns 346
|
2020-08-22 16:38:29 +02:00
|
|
|
#elif defined(__powerpc__)
|
|
|
|
# define systemd_NR_setns 350
|
|
|
|
#elif defined __s390__ || defined __s390x__
|
|
|
|
# define systemd_NR_setns 339
|
2020-08-18 09:22:20 +02:00
|
|
|
#elif defined(__arc__)
|
|
|
|
# define systemd_NR_setns 268
|
|
|
|
#else
|
|
|
|
# warning "setns() syscall number unknown for your architecture"
|
|
|
|
#endif
|
|
|
|
|
2019-08-15 03:08:36 +02:00
|
|
|
/* may be (invalid) negative number due to libseccomp, see PR 13319 */
|
2020-08-18 09:22:20 +02:00
|
|
|
#if defined __NR_setns && __NR_setns >= 0
|
|
|
|
# if defined systemd_NR_setns
|
|
|
|
assert_cc(__NR_setns == systemd_NR_setns);
|
|
|
|
# endif
|
|
|
|
#else
|
|
|
|
# if defined __NR_setns
|
|
|
|
# undef __NR_setns
|
2016-03-17 18:26:13 +01:00
|
|
|
# endif
|
2020-08-18 09:22:20 +02:00
|
|
|
# if defined systemd_NR_setns
|
|
|
|
# define __NR_setns systemd_NR_setns
|
|
|
|
# endif
|
|
|
|
#endif
|
2016-03-17 18:26:13 +01:00
|
|
|
|
2020-08-18 09:22:20 +02:00
|
|
|
#if !HAVE_SETNS
|
missing_syscall: when adding syscall replacements, use different names (#8229)
In meson.build we check that functions are available using:
meson.get_compiler('c').has_function('foo')
which checks the following:
- if __stub_foo or __stub___foo are defined, return false
- if foo is declared (a pointer to the function can be taken), return true
- otherwise check for __builtin_memfd_create
_stub is documented by glibc as
It defines a symbol '__stub_FUNCTION' for each function
in the C library which is a stub, meaning it will fail
every time called, usually setting errno to ENOSYS.
So if __stub is defined, we know we don't want to use the glibc version, but
this doesn't tell us if the name itself is defined or not. If it _is_ defined,
and we define our replacement as an inline static function, we get an error:
In file included from ../src/basic/missing.h:1358:0,
from ../src/basic/util.h:47,
from ../src/basic/calendarspec.h:29,
from ../src/basic/calendarspec.c:34:
../src/basic/missing_syscall.h:65:19: error: static declaration of 'memfd_create' follows non-static declaration
static inline int memfd_create(const char *name, unsigned int flags) {
^~~~~~~~~~~~
.../usr/include/bits/mman-shared.h:46:5: note: previous declaration of 'memfd_create' was here
int memfd_create (const char *__name, unsigned int __flags) __THROW;
^~~~~~~~~~~~
To avoid this problem, call our inline functions different than glibc,
and use a #define to map the official name to our replacement.
Fixes #8099.
v2:
- use "missing_" as the prefix instead of "_"
v3:
- rebase and update for statx()
Unfortunately "statx" is also present in "struct statx", so the define
causes issues. Work around this by using a typedef.
I checked that systemd compiles with current glibc
(glibc-devel-2.26-24.fc27.x86_64) if HAVE_MEMFD_CREATE, HAVE_GETTID,
HAVE_PIVOT_ROOT, HAVE_SETNS, HAVE_RENAMEAT2, HAVE_KCMP, HAVE_KEYCTL,
HAVE_COPY_FILE_RANGE, HAVE_BPF, HAVE_STATX are forced to 0.
Setting HAVE_NAME_TO_HANDLE_AT to 0 causes an issue, but it's not because of
the define, but because of struct file_handle.
2018-02-21 14:04:50 +01:00
|
|
|
static inline int missing_setns(int fd, int nstype) {
|
2016-03-17 18:26:13 +01:00
|
|
|
# ifdef __NR_setns
|
|
|
|
return syscall(__NR_setns, fd, nstype);
|
|
|
|
# else
|
|
|
|
errno = ENOSYS;
|
|
|
|
return -1;
|
|
|
|
# endif
|
|
|
|
}
|
missing_syscall: when adding syscall replacements, use different names (#8229)
In meson.build we check that functions are available using:
meson.get_compiler('c').has_function('foo')
which checks the following:
- if __stub_foo or __stub___foo are defined, return false
- if foo is declared (a pointer to the function can be taken), return true
- otherwise check for __builtin_memfd_create
_stub is documented by glibc as
It defines a symbol '__stub_FUNCTION' for each function
in the C library which is a stub, meaning it will fail
every time called, usually setting errno to ENOSYS.
So if __stub is defined, we know we don't want to use the glibc version, but
this doesn't tell us if the name itself is defined or not. If it _is_ defined,
and we define our replacement as an inline static function, we get an error:
In file included from ../src/basic/missing.h:1358:0,
from ../src/basic/util.h:47,
from ../src/basic/calendarspec.h:29,
from ../src/basic/calendarspec.c:34:
../src/basic/missing_syscall.h:65:19: error: static declaration of 'memfd_create' follows non-static declaration
static inline int memfd_create(const char *name, unsigned int flags) {
^~~~~~~~~~~~
.../usr/include/bits/mman-shared.h:46:5: note: previous declaration of 'memfd_create' was here
int memfd_create (const char *__name, unsigned int __flags) __THROW;
^~~~~~~~~~~~
To avoid this problem, call our inline functions different than glibc,
and use a #define to map the official name to our replacement.
Fixes #8099.
v2:
- use "missing_" as the prefix instead of "_"
v3:
- rebase and update for statx()
Unfortunately "statx" is also present in "struct statx", so the define
causes issues. Work around this by using a typedef.
I checked that systemd compiles with current glibc
(glibc-devel-2.26-24.fc27.x86_64) if HAVE_MEMFD_CREATE, HAVE_GETTID,
HAVE_PIVOT_ROOT, HAVE_SETNS, HAVE_RENAMEAT2, HAVE_KCMP, HAVE_KEYCTL,
HAVE_COPY_FILE_RANGE, HAVE_BPF, HAVE_STATX are forced to 0.
Setting HAVE_NAME_TO_HANDLE_AT to 0 causes an issue, but it's not because of
the define, but because of struct file_handle.
2018-02-21 14:04:50 +01:00
|
|
|
|
|
|
|
# define setns missing_setns
|
2016-03-17 18:26:13 +01:00
|
|
|
#endif
|
|
|
|
|
|
|
|
/* ======================================================================= */
|
|
|
|
|
|
|
|
static inline pid_t raw_getpid(void) {
|
|
|
|
#if defined(__alpha__)
|
|
|
|
return (pid_t) syscall(__NR_getxpid);
|
|
|
|
#else
|
|
|
|
return (pid_t) syscall(__NR_getpid);
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
|
|
|
/* ======================================================================= */
|
|
|
|
|
2020-08-18 09:22:20 +02:00
|
|
|
#if defined __x86_64__
|
|
|
|
# define systemd_NR_renameat2 316
|
|
|
|
#elif defined __arm__
|
|
|
|
# define systemd_NR_renameat2 382
|
|
|
|
#elif defined __aarch64__
|
|
|
|
# define systemd_NR_renameat2 276
|
|
|
|
#elif defined _MIPS_SIM
|
|
|
|
# if _MIPS_SIM == _MIPS_SIM_ABI32
|
|
|
|
# define systemd_NR_renameat2 4351
|
|
|
|
# endif
|
|
|
|
# if _MIPS_SIM == _MIPS_SIM_NABI32
|
|
|
|
# define systemd_NR_renameat2 6315
|
|
|
|
# endif
|
|
|
|
# if _MIPS_SIM == _MIPS_SIM_ABI64
|
|
|
|
# define systemd_NR_renameat2 5311
|
|
|
|
# endif
|
|
|
|
#elif defined __i386__
|
|
|
|
# define systemd_NR_renameat2 353
|
|
|
|
#elif defined __powerpc64__
|
|
|
|
# define systemd_NR_renameat2 357
|
|
|
|
#elif defined __s390__ || defined __s390x__
|
|
|
|
# define systemd_NR_renameat2 347
|
|
|
|
#elif defined __arc__
|
|
|
|
# define systemd_NR_renameat2 276
|
|
|
|
#else
|
|
|
|
# warning "renameat2() syscall number unknown for your architecture"
|
|
|
|
#endif
|
|
|
|
|
2019-08-15 03:08:36 +02:00
|
|
|
/* may be (invalid) negative number due to libseccomp, see PR 13319 */
|
2020-08-18 09:22:20 +02:00
|
|
|
#if defined __NR_renameat2 && __NR_renameat2 >= 0
|
|
|
|
# if defined systemd_NR_renameat2
|
|
|
|
assert_cc(__NR_renameat2 == systemd_NR_renameat2);
|
|
|
|
# endif
|
|
|
|
#else
|
|
|
|
# if defined __NR_renameat2
|
|
|
|
# undef __NR_renameat2
|
2016-03-17 18:26:13 +01:00
|
|
|
# endif
|
2020-08-18 09:22:20 +02:00
|
|
|
# if defined systemd_NR_renameat2
|
|
|
|
# define __NR_renameat2 systemd_NR_renameat2
|
|
|
|
# endif
|
|
|
|
#endif
|
2016-03-17 18:26:13 +01:00
|
|
|
|
2020-08-18 09:22:20 +02:00
|
|
|
#if !HAVE_RENAMEAT2
|
missing_syscall: when adding syscall replacements, use different names (#8229)
In meson.build we check that functions are available using:
meson.get_compiler('c').has_function('foo')
which checks the following:
- if __stub_foo or __stub___foo are defined, return false
- if foo is declared (a pointer to the function can be taken), return true
- otherwise check for __builtin_memfd_create
_stub is documented by glibc as
It defines a symbol '__stub_FUNCTION' for each function
in the C library which is a stub, meaning it will fail
every time called, usually setting errno to ENOSYS.
So if __stub is defined, we know we don't want to use the glibc version, but
this doesn't tell us if the name itself is defined or not. If it _is_ defined,
and we define our replacement as an inline static function, we get an error:
In file included from ../src/basic/missing.h:1358:0,
from ../src/basic/util.h:47,
from ../src/basic/calendarspec.h:29,
from ../src/basic/calendarspec.c:34:
../src/basic/missing_syscall.h:65:19: error: static declaration of 'memfd_create' follows non-static declaration
static inline int memfd_create(const char *name, unsigned int flags) {
^~~~~~~~~~~~
.../usr/include/bits/mman-shared.h:46:5: note: previous declaration of 'memfd_create' was here
int memfd_create (const char *__name, unsigned int __flags) __THROW;
^~~~~~~~~~~~
To avoid this problem, call our inline functions different than glibc,
and use a #define to map the official name to our replacement.
Fixes #8099.
v2:
- use "missing_" as the prefix instead of "_"
v3:
- rebase and update for statx()
Unfortunately "statx" is also present in "struct statx", so the define
causes issues. Work around this by using a typedef.
I checked that systemd compiles with current glibc
(glibc-devel-2.26-24.fc27.x86_64) if HAVE_MEMFD_CREATE, HAVE_GETTID,
HAVE_PIVOT_ROOT, HAVE_SETNS, HAVE_RENAMEAT2, HAVE_KCMP, HAVE_KEYCTL,
HAVE_COPY_FILE_RANGE, HAVE_BPF, HAVE_STATX are forced to 0.
Setting HAVE_NAME_TO_HANDLE_AT to 0 causes an issue, but it's not because of
the define, but because of struct file_handle.
2018-02-21 14:04:50 +01:00
|
|
|
static inline int missing_renameat2(int oldfd, const char *oldname, int newfd, const char *newname, unsigned flags) {
|
2016-03-17 18:26:13 +01:00
|
|
|
# ifdef __NR_renameat2
|
|
|
|
return syscall(__NR_renameat2, oldfd, oldname, newfd, newname, flags);
|
|
|
|
# else
|
|
|
|
errno = ENOSYS;
|
|
|
|
return -1;
|
|
|
|
# endif
|
|
|
|
}
|
missing_syscall: when adding syscall replacements, use different names (#8229)
In meson.build we check that functions are available using:
meson.get_compiler('c').has_function('foo')
which checks the following:
- if __stub_foo or __stub___foo are defined, return false
- if foo is declared (a pointer to the function can be taken), return true
- otherwise check for __builtin_memfd_create
_stub is documented by glibc as
It defines a symbol '__stub_FUNCTION' for each function
in the C library which is a stub, meaning it will fail
every time called, usually setting errno to ENOSYS.
So if __stub is defined, we know we don't want to use the glibc version, but
this doesn't tell us if the name itself is defined or not. If it _is_ defined,
and we define our replacement as an inline static function, we get an error:
In file included from ../src/basic/missing.h:1358:0,
from ../src/basic/util.h:47,
from ../src/basic/calendarspec.h:29,
from ../src/basic/calendarspec.c:34:
../src/basic/missing_syscall.h:65:19: error: static declaration of 'memfd_create' follows non-static declaration
static inline int memfd_create(const char *name, unsigned int flags) {
^~~~~~~~~~~~
.../usr/include/bits/mman-shared.h:46:5: note: previous declaration of 'memfd_create' was here
int memfd_create (const char *__name, unsigned int __flags) __THROW;
^~~~~~~~~~~~
To avoid this problem, call our inline functions different than glibc,
and use a #define to map the official name to our replacement.
Fixes #8099.
v2:
- use "missing_" as the prefix instead of "_"
v3:
- rebase and update for statx()
Unfortunately "statx" is also present in "struct statx", so the define
causes issues. Work around this by using a typedef.
I checked that systemd compiles with current glibc
(glibc-devel-2.26-24.fc27.x86_64) if HAVE_MEMFD_CREATE, HAVE_GETTID,
HAVE_PIVOT_ROOT, HAVE_SETNS, HAVE_RENAMEAT2, HAVE_KCMP, HAVE_KEYCTL,
HAVE_COPY_FILE_RANGE, HAVE_BPF, HAVE_STATX are forced to 0.
Setting HAVE_NAME_TO_HANDLE_AT to 0 causes an issue, but it's not because of
the define, but because of struct file_handle.
2018-02-21 14:04:50 +01:00
|
|
|
|
|
|
|
# define renameat2 missing_renameat2
|
2016-03-17 18:26:13 +01:00
|
|
|
#endif
|
|
|
|
|
|
|
|
/* ======================================================================= */
|
|
|
|
|
2017-10-03 10:32:34 +02:00
|
|
|
#if !HAVE_KCMP
|
missing_syscall: when adding syscall replacements, use different names (#8229)
In meson.build we check that functions are available using:
meson.get_compiler('c').has_function('foo')
which checks the following:
- if __stub_foo or __stub___foo are defined, return false
- if foo is declared (a pointer to the function can be taken), return true
- otherwise check for __builtin_memfd_create
_stub is documented by glibc as
It defines a symbol '__stub_FUNCTION' for each function
in the C library which is a stub, meaning it will fail
every time called, usually setting errno to ENOSYS.
So if __stub is defined, we know we don't want to use the glibc version, but
this doesn't tell us if the name itself is defined or not. If it _is_ defined,
and we define our replacement as an inline static function, we get an error:
In file included from ../src/basic/missing.h:1358:0,
from ../src/basic/util.h:47,
from ../src/basic/calendarspec.h:29,
from ../src/basic/calendarspec.c:34:
../src/basic/missing_syscall.h:65:19: error: static declaration of 'memfd_create' follows non-static declaration
static inline int memfd_create(const char *name, unsigned int flags) {
^~~~~~~~~~~~
.../usr/include/bits/mman-shared.h:46:5: note: previous declaration of 'memfd_create' was here
int memfd_create (const char *__name, unsigned int __flags) __THROW;
^~~~~~~~~~~~
To avoid this problem, call our inline functions different than glibc,
and use a #define to map the official name to our replacement.
Fixes #8099.
v2:
- use "missing_" as the prefix instead of "_"
v3:
- rebase and update for statx()
Unfortunately "statx" is also present in "struct statx", so the define
causes issues. Work around this by using a typedef.
I checked that systemd compiles with current glibc
(glibc-devel-2.26-24.fc27.x86_64) if HAVE_MEMFD_CREATE, HAVE_GETTID,
HAVE_PIVOT_ROOT, HAVE_SETNS, HAVE_RENAMEAT2, HAVE_KCMP, HAVE_KEYCTL,
HAVE_COPY_FILE_RANGE, HAVE_BPF, HAVE_STATX are forced to 0.
Setting HAVE_NAME_TO_HANDLE_AT to 0 causes an issue, but it's not because of
the define, but because of struct file_handle.
2018-02-21 14:04:50 +01:00
|
|
|
static inline int missing_kcmp(pid_t pid1, pid_t pid2, int type, unsigned long idx1, unsigned long idx2) {
|
2019-12-06 20:28:13 +01:00
|
|
|
# if defined __NR_kcmp && __NR_kcmp >= 0
|
2016-03-17 18:26:13 +01:00
|
|
|
return syscall(__NR_kcmp, pid1, pid2, type, idx1, idx2);
|
|
|
|
# else
|
|
|
|
errno = ENOSYS;
|
|
|
|
return -1;
|
|
|
|
# endif
|
|
|
|
}
|
missing_syscall: when adding syscall replacements, use different names (#8229)
In meson.build we check that functions are available using:
meson.get_compiler('c').has_function('foo')
which checks the following:
- if __stub_foo or __stub___foo are defined, return false
- if foo is declared (a pointer to the function can be taken), return true
- otherwise check for __builtin_memfd_create
_stub is documented by glibc as
It defines a symbol '__stub_FUNCTION' for each function
in the C library which is a stub, meaning it will fail
every time called, usually setting errno to ENOSYS.
So if __stub is defined, we know we don't want to use the glibc version, but
this doesn't tell us if the name itself is defined or not. If it _is_ defined,
and we define our replacement as an inline static function, we get an error:
In file included from ../src/basic/missing.h:1358:0,
from ../src/basic/util.h:47,
from ../src/basic/calendarspec.h:29,
from ../src/basic/calendarspec.c:34:
../src/basic/missing_syscall.h:65:19: error: static declaration of 'memfd_create' follows non-static declaration
static inline int memfd_create(const char *name, unsigned int flags) {
^~~~~~~~~~~~
.../usr/include/bits/mman-shared.h:46:5: note: previous declaration of 'memfd_create' was here
int memfd_create (const char *__name, unsigned int __flags) __THROW;
^~~~~~~~~~~~
To avoid this problem, call our inline functions different than glibc,
and use a #define to map the official name to our replacement.
Fixes #8099.
v2:
- use "missing_" as the prefix instead of "_"
v3:
- rebase and update for statx()
Unfortunately "statx" is also present in "struct statx", so the define
causes issues. Work around this by using a typedef.
I checked that systemd compiles with current glibc
(glibc-devel-2.26-24.fc27.x86_64) if HAVE_MEMFD_CREATE, HAVE_GETTID,
HAVE_PIVOT_ROOT, HAVE_SETNS, HAVE_RENAMEAT2, HAVE_KCMP, HAVE_KEYCTL,
HAVE_COPY_FILE_RANGE, HAVE_BPF, HAVE_STATX are forced to 0.
Setting HAVE_NAME_TO_HANDLE_AT to 0 causes an issue, but it's not because of
the define, but because of struct file_handle.
2018-02-21 14:04:50 +01:00
|
|
|
|
|
|
|
# define kcmp missing_kcmp
|
2016-03-17 18:26:13 +01:00
|
|
|
#endif
|
|
|
|
|
|
|
|
/* ======================================================================= */
|
|
|
|
|
2017-10-03 10:32:34 +02:00
|
|
|
#if !HAVE_KEYCTL
|
2018-12-06 06:32:41 +01:00
|
|
|
static inline long missing_keyctl(int cmd, unsigned long arg2, unsigned long arg3, unsigned long arg4, unsigned long arg5) {
|
2019-12-06 20:28:13 +01:00
|
|
|
# if defined __NR_keyctl && __NR_keyctl >= 0
|
2016-03-17 18:26:13 +01:00
|
|
|
return syscall(__NR_keyctl, cmd, arg2, arg3, arg4, arg5);
|
|
|
|
# else
|
|
|
|
errno = ENOSYS;
|
|
|
|
return -1;
|
|
|
|
# endif
|
missing_syscall: when adding syscall replacements, use different names (#8229)
In meson.build we check that functions are available using:
meson.get_compiler('c').has_function('foo')
which checks the following:
- if __stub_foo or __stub___foo are defined, return false
- if foo is declared (a pointer to the function can be taken), return true
- otherwise check for __builtin_memfd_create
_stub is documented by glibc as
It defines a symbol '__stub_FUNCTION' for each function
in the C library which is a stub, meaning it will fail
every time called, usually setting errno to ENOSYS.
So if __stub is defined, we know we don't want to use the glibc version, but
this doesn't tell us if the name itself is defined or not. If it _is_ defined,
and we define our replacement as an inline static function, we get an error:
In file included from ../src/basic/missing.h:1358:0,
from ../src/basic/util.h:47,
from ../src/basic/calendarspec.h:29,
from ../src/basic/calendarspec.c:34:
../src/basic/missing_syscall.h:65:19: error: static declaration of 'memfd_create' follows non-static declaration
static inline int memfd_create(const char *name, unsigned int flags) {
^~~~~~~~~~~~
.../usr/include/bits/mman-shared.h:46:5: note: previous declaration of 'memfd_create' was here
int memfd_create (const char *__name, unsigned int __flags) __THROW;
^~~~~~~~~~~~
To avoid this problem, call our inline functions different than glibc,
and use a #define to map the official name to our replacement.
Fixes #8099.
v2:
- use "missing_" as the prefix instead of "_"
v3:
- rebase and update for statx()
Unfortunately "statx" is also present in "struct statx", so the define
causes issues. Work around this by using a typedef.
I checked that systemd compiles with current glibc
(glibc-devel-2.26-24.fc27.x86_64) if HAVE_MEMFD_CREATE, HAVE_GETTID,
HAVE_PIVOT_ROOT, HAVE_SETNS, HAVE_RENAMEAT2, HAVE_KCMP, HAVE_KEYCTL,
HAVE_COPY_FILE_RANGE, HAVE_BPF, HAVE_STATX are forced to 0.
Setting HAVE_NAME_TO_HANDLE_AT to 0 causes an issue, but it's not because of
the define, but because of struct file_handle.
2018-02-21 14:04:50 +01:00
|
|
|
|
|
|
|
# define keyctl missing_keyctl
|
2016-03-17 18:26:13 +01:00
|
|
|
}
|
|
|
|
|
missing_syscall: when adding syscall replacements, use different names (#8229)
In meson.build we check that functions are available using:
meson.get_compiler('c').has_function('foo')
which checks the following:
- if __stub_foo or __stub___foo are defined, return false
- if foo is declared (a pointer to the function can be taken), return true
- otherwise check for __builtin_memfd_create
_stub is documented by glibc as
It defines a symbol '__stub_FUNCTION' for each function
in the C library which is a stub, meaning it will fail
every time called, usually setting errno to ENOSYS.
So if __stub is defined, we know we don't want to use the glibc version, but
this doesn't tell us if the name itself is defined or not. If it _is_ defined,
and we define our replacement as an inline static function, we get an error:
In file included from ../src/basic/missing.h:1358:0,
from ../src/basic/util.h:47,
from ../src/basic/calendarspec.h:29,
from ../src/basic/calendarspec.c:34:
../src/basic/missing_syscall.h:65:19: error: static declaration of 'memfd_create' follows non-static declaration
static inline int memfd_create(const char *name, unsigned int flags) {
^~~~~~~~~~~~
.../usr/include/bits/mman-shared.h:46:5: note: previous declaration of 'memfd_create' was here
int memfd_create (const char *__name, unsigned int __flags) __THROW;
^~~~~~~~~~~~
To avoid this problem, call our inline functions different than glibc,
and use a #define to map the official name to our replacement.
Fixes #8099.
v2:
- use "missing_" as the prefix instead of "_"
v3:
- rebase and update for statx()
Unfortunately "statx" is also present in "struct statx", so the define
causes issues. Work around this by using a typedef.
I checked that systemd compiles with current glibc
(glibc-devel-2.26-24.fc27.x86_64) if HAVE_MEMFD_CREATE, HAVE_GETTID,
HAVE_PIVOT_ROOT, HAVE_SETNS, HAVE_RENAMEAT2, HAVE_KCMP, HAVE_KEYCTL,
HAVE_COPY_FILE_RANGE, HAVE_BPF, HAVE_STATX are forced to 0.
Setting HAVE_NAME_TO_HANDLE_AT to 0 causes an issue, but it's not because of
the define, but because of struct file_handle.
2018-02-21 14:04:50 +01:00
|
|
|
static inline key_serial_t missing_add_key(const char *type, const char *description, const void *payload, size_t plen, key_serial_t ringid) {
|
2019-12-06 20:28:13 +01:00
|
|
|
# if defined __NR_add_key && __NR_add_key >= 0
|
2016-03-17 18:26:13 +01:00
|
|
|
return syscall(__NR_add_key, type, description, payload, plen, ringid);
|
|
|
|
# else
|
|
|
|
errno = ENOSYS;
|
|
|
|
return -1;
|
|
|
|
# endif
|
missing_syscall: when adding syscall replacements, use different names (#8229)
In meson.build we check that functions are available using:
meson.get_compiler('c').has_function('foo')
which checks the following:
- if __stub_foo or __stub___foo are defined, return false
- if foo is declared (a pointer to the function can be taken), return true
- otherwise check for __builtin_memfd_create
_stub is documented by glibc as
It defines a symbol '__stub_FUNCTION' for each function
in the C library which is a stub, meaning it will fail
every time called, usually setting errno to ENOSYS.
So if __stub is defined, we know we don't want to use the glibc version, but
this doesn't tell us if the name itself is defined or not. If it _is_ defined,
and we define our replacement as an inline static function, we get an error:
In file included from ../src/basic/missing.h:1358:0,
from ../src/basic/util.h:47,
from ../src/basic/calendarspec.h:29,
from ../src/basic/calendarspec.c:34:
../src/basic/missing_syscall.h:65:19: error: static declaration of 'memfd_create' follows non-static declaration
static inline int memfd_create(const char *name, unsigned int flags) {
^~~~~~~~~~~~
.../usr/include/bits/mman-shared.h:46:5: note: previous declaration of 'memfd_create' was here
int memfd_create (const char *__name, unsigned int __flags) __THROW;
^~~~~~~~~~~~
To avoid this problem, call our inline functions different than glibc,
and use a #define to map the official name to our replacement.
Fixes #8099.
v2:
- use "missing_" as the prefix instead of "_"
v3:
- rebase and update for statx()
Unfortunately "statx" is also present in "struct statx", so the define
causes issues. Work around this by using a typedef.
I checked that systemd compiles with current glibc
(glibc-devel-2.26-24.fc27.x86_64) if HAVE_MEMFD_CREATE, HAVE_GETTID,
HAVE_PIVOT_ROOT, HAVE_SETNS, HAVE_RENAMEAT2, HAVE_KCMP, HAVE_KEYCTL,
HAVE_COPY_FILE_RANGE, HAVE_BPF, HAVE_STATX are forced to 0.
Setting HAVE_NAME_TO_HANDLE_AT to 0 causes an issue, but it's not because of
the define, but because of struct file_handle.
2018-02-21 14:04:50 +01:00
|
|
|
|
|
|
|
# define add_key missing_add_key
|
2016-03-17 18:26:13 +01:00
|
|
|
}
|
|
|
|
|
missing_syscall: when adding syscall replacements, use different names (#8229)
In meson.build we check that functions are available using:
meson.get_compiler('c').has_function('foo')
which checks the following:
- if __stub_foo or __stub___foo are defined, return false
- if foo is declared (a pointer to the function can be taken), return true
- otherwise check for __builtin_memfd_create
_stub is documented by glibc as
It defines a symbol '__stub_FUNCTION' for each function
in the C library which is a stub, meaning it will fail
every time called, usually setting errno to ENOSYS.
So if __stub is defined, we know we don't want to use the glibc version, but
this doesn't tell us if the name itself is defined or not. If it _is_ defined,
and we define our replacement as an inline static function, we get an error:
In file included from ../src/basic/missing.h:1358:0,
from ../src/basic/util.h:47,
from ../src/basic/calendarspec.h:29,
from ../src/basic/calendarspec.c:34:
../src/basic/missing_syscall.h:65:19: error: static declaration of 'memfd_create' follows non-static declaration
static inline int memfd_create(const char *name, unsigned int flags) {
^~~~~~~~~~~~
.../usr/include/bits/mman-shared.h:46:5: note: previous declaration of 'memfd_create' was here
int memfd_create (const char *__name, unsigned int __flags) __THROW;
^~~~~~~~~~~~
To avoid this problem, call our inline functions different than glibc,
and use a #define to map the official name to our replacement.
Fixes #8099.
v2:
- use "missing_" as the prefix instead of "_"
v3:
- rebase and update for statx()
Unfortunately "statx" is also present in "struct statx", so the define
causes issues. Work around this by using a typedef.
I checked that systemd compiles with current glibc
(glibc-devel-2.26-24.fc27.x86_64) if HAVE_MEMFD_CREATE, HAVE_GETTID,
HAVE_PIVOT_ROOT, HAVE_SETNS, HAVE_RENAMEAT2, HAVE_KCMP, HAVE_KEYCTL,
HAVE_COPY_FILE_RANGE, HAVE_BPF, HAVE_STATX are forced to 0.
Setting HAVE_NAME_TO_HANDLE_AT to 0 causes an issue, but it's not because of
the define, but because of struct file_handle.
2018-02-21 14:04:50 +01:00
|
|
|
static inline key_serial_t missing_request_key(const char *type, const char *description, const char * callout_info, key_serial_t destringid) {
|
2019-12-06 20:28:13 +01:00
|
|
|
# if defined __NR_request_key && __NR_request_key >= 0
|
2016-03-17 18:26:13 +01:00
|
|
|
return syscall(__NR_request_key, type, description, callout_info, destringid);
|
|
|
|
# else
|
|
|
|
errno = ENOSYS;
|
|
|
|
return -1;
|
|
|
|
# endif
|
missing_syscall: when adding syscall replacements, use different names (#8229)
In meson.build we check that functions are available using:
meson.get_compiler('c').has_function('foo')
which checks the following:
- if __stub_foo or __stub___foo are defined, return false
- if foo is declared (a pointer to the function can be taken), return true
- otherwise check for __builtin_memfd_create
_stub is documented by glibc as
It defines a symbol '__stub_FUNCTION' for each function
in the C library which is a stub, meaning it will fail
every time called, usually setting errno to ENOSYS.
So if __stub is defined, we know we don't want to use the glibc version, but
this doesn't tell us if the name itself is defined or not. If it _is_ defined,
and we define our replacement as an inline static function, we get an error:
In file included from ../src/basic/missing.h:1358:0,
from ../src/basic/util.h:47,
from ../src/basic/calendarspec.h:29,
from ../src/basic/calendarspec.c:34:
../src/basic/missing_syscall.h:65:19: error: static declaration of 'memfd_create' follows non-static declaration
static inline int memfd_create(const char *name, unsigned int flags) {
^~~~~~~~~~~~
.../usr/include/bits/mman-shared.h:46:5: note: previous declaration of 'memfd_create' was here
int memfd_create (const char *__name, unsigned int __flags) __THROW;
^~~~~~~~~~~~
To avoid this problem, call our inline functions different than glibc,
and use a #define to map the official name to our replacement.
Fixes #8099.
v2:
- use "missing_" as the prefix instead of "_"
v3:
- rebase and update for statx()
Unfortunately "statx" is also present in "struct statx", so the define
causes issues. Work around this by using a typedef.
I checked that systemd compiles with current glibc
(glibc-devel-2.26-24.fc27.x86_64) if HAVE_MEMFD_CREATE, HAVE_GETTID,
HAVE_PIVOT_ROOT, HAVE_SETNS, HAVE_RENAMEAT2, HAVE_KCMP, HAVE_KEYCTL,
HAVE_COPY_FILE_RANGE, HAVE_BPF, HAVE_STATX are forced to 0.
Setting HAVE_NAME_TO_HANDLE_AT to 0 causes an issue, but it's not because of
the define, but because of struct file_handle.
2018-02-21 14:04:50 +01:00
|
|
|
|
|
|
|
# define request_key missing_request_key
|
2016-03-17 18:26:13 +01:00
|
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/* ======================================================================= */
|
|
|
|
|
2020-08-18 09:22:20 +02:00
|
|
|
#if defined(__x86_64__)
|
|
|
|
# define systemd_NR_copy_file_range 326
|
|
|
|
#elif defined(__i386__)
|
|
|
|
# define systemd_NR_copy_file_range 377
|
|
|
|
#elif defined __s390__
|
|
|
|
# define systemd_NR_copy_file_range 375
|
|
|
|
#elif defined __arm__
|
|
|
|
# define systemd_NR_copy_file_range 391
|
|
|
|
#elif defined __aarch64__
|
|
|
|
# define systemd_NR_copy_file_range 285
|
|
|
|
#elif defined __powerpc__
|
|
|
|
# define systemd_NR_copy_file_range 379
|
|
|
|
#elif defined __arc__
|
|
|
|
# define systemd_NR_copy_file_range 285
|
|
|
|
#else
|
|
|
|
# warning "copy_file_range() syscall number unknown for your architecture"
|
|
|
|
#endif
|
|
|
|
|
2019-08-15 03:08:36 +02:00
|
|
|
/* may be (invalid) negative number due to libseccomp, see PR 13319 */
|
2020-08-18 09:22:20 +02:00
|
|
|
#if defined __NR_copy_file_range && __NR_copy_file_range >= 0
|
|
|
|
# if defined systemd_NR_copy_file_range
|
|
|
|
assert_cc(__NR_copy_file_range == systemd_NR_copy_file_range);
|
2016-03-17 18:26:13 +01:00
|
|
|
# endif
|
2020-08-18 09:22:20 +02:00
|
|
|
#else
|
|
|
|
# if defined __NR_copy_file_range
|
|
|
|
# undef __NR_copy_file_range
|
|
|
|
# endif
|
|
|
|
# if defined systemd_NR_copy_file_range
|
|
|
|
# define __NR_copy_file_range systemd_NR_copy_file_range
|
|
|
|
# endif
|
|
|
|
#endif
|
2016-03-17 18:26:13 +01:00
|
|
|
|
2020-08-18 09:22:20 +02:00
|
|
|
#if !HAVE_COPY_FILE_RANGE
|
missing_syscall: when adding syscall replacements, use different names (#8229)
In meson.build we check that functions are available using:
meson.get_compiler('c').has_function('foo')
which checks the following:
- if __stub_foo or __stub___foo are defined, return false
- if foo is declared (a pointer to the function can be taken), return true
- otherwise check for __builtin_memfd_create
_stub is documented by glibc as
It defines a symbol '__stub_FUNCTION' for each function
in the C library which is a stub, meaning it will fail
every time called, usually setting errno to ENOSYS.
So if __stub is defined, we know we don't want to use the glibc version, but
this doesn't tell us if the name itself is defined or not. If it _is_ defined,
and we define our replacement as an inline static function, we get an error:
In file included from ../src/basic/missing.h:1358:0,
from ../src/basic/util.h:47,
from ../src/basic/calendarspec.h:29,
from ../src/basic/calendarspec.c:34:
../src/basic/missing_syscall.h:65:19: error: static declaration of 'memfd_create' follows non-static declaration
static inline int memfd_create(const char *name, unsigned int flags) {
^~~~~~~~~~~~
.../usr/include/bits/mman-shared.h:46:5: note: previous declaration of 'memfd_create' was here
int memfd_create (const char *__name, unsigned int __flags) __THROW;
^~~~~~~~~~~~
To avoid this problem, call our inline functions different than glibc,
and use a #define to map the official name to our replacement.
Fixes #8099.
v2:
- use "missing_" as the prefix instead of "_"
v3:
- rebase and update for statx()
Unfortunately "statx" is also present in "struct statx", so the define
causes issues. Work around this by using a typedef.
I checked that systemd compiles with current glibc
(glibc-devel-2.26-24.fc27.x86_64) if HAVE_MEMFD_CREATE, HAVE_GETTID,
HAVE_PIVOT_ROOT, HAVE_SETNS, HAVE_RENAMEAT2, HAVE_KCMP, HAVE_KEYCTL,
HAVE_COPY_FILE_RANGE, HAVE_BPF, HAVE_STATX are forced to 0.
Setting HAVE_NAME_TO_HANDLE_AT to 0 causes an issue, but it's not because of
the define, but because of struct file_handle.
2018-02-21 14:04:50 +01:00
|
|
|
static inline ssize_t missing_copy_file_range(int fd_in, loff_t *off_in,
|
|
|
|
int fd_out, loff_t *off_out,
|
|
|
|
size_t len,
|
|
|
|
unsigned int flags) {
|
2016-03-17 18:26:13 +01:00
|
|
|
# ifdef __NR_copy_file_range
|
|
|
|
return syscall(__NR_copy_file_range, fd_in, off_in, fd_out, off_out, len, flags);
|
|
|
|
# else
|
|
|
|
errno = ENOSYS;
|
|
|
|
return -1;
|
|
|
|
# endif
|
|
|
|
}
|
missing_syscall: when adding syscall replacements, use different names (#8229)
In meson.build we check that functions are available using:
meson.get_compiler('c').has_function('foo')
which checks the following:
- if __stub_foo or __stub___foo are defined, return false
- if foo is declared (a pointer to the function can be taken), return true
- otherwise check for __builtin_memfd_create
_stub is documented by glibc as
It defines a symbol '__stub_FUNCTION' for each function
in the C library which is a stub, meaning it will fail
every time called, usually setting errno to ENOSYS.
So if __stub is defined, we know we don't want to use the glibc version, but
this doesn't tell us if the name itself is defined or not. If it _is_ defined,
and we define our replacement as an inline static function, we get an error:
In file included from ../src/basic/missing.h:1358:0,
from ../src/basic/util.h:47,
from ../src/basic/calendarspec.h:29,
from ../src/basic/calendarspec.c:34:
../src/basic/missing_syscall.h:65:19: error: static declaration of 'memfd_create' follows non-static declaration
static inline int memfd_create(const char *name, unsigned int flags) {
^~~~~~~~~~~~
.../usr/include/bits/mman-shared.h:46:5: note: previous declaration of 'memfd_create' was here
int memfd_create (const char *__name, unsigned int __flags) __THROW;
^~~~~~~~~~~~
To avoid this problem, call our inline functions different than glibc,
and use a #define to map the official name to our replacement.
Fixes #8099.
v2:
- use "missing_" as the prefix instead of "_"
v3:
- rebase and update for statx()
Unfortunately "statx" is also present in "struct statx", so the define
causes issues. Work around this by using a typedef.
I checked that systemd compiles with current glibc
(glibc-devel-2.26-24.fc27.x86_64) if HAVE_MEMFD_CREATE, HAVE_GETTID,
HAVE_PIVOT_ROOT, HAVE_SETNS, HAVE_RENAMEAT2, HAVE_KCMP, HAVE_KEYCTL,
HAVE_COPY_FILE_RANGE, HAVE_BPF, HAVE_STATX are forced to 0.
Setting HAVE_NAME_TO_HANDLE_AT to 0 causes an issue, but it's not because of
the define, but because of struct file_handle.
2018-02-21 14:04:50 +01:00
|
|
|
|
|
|
|
# define copy_file_range missing_copy_file_range
|
2016-03-17 18:26:13 +01:00
|
|
|
#endif
|
2016-10-18 17:57:10 +02:00
|
|
|
|
2017-11-13 09:27:53 +01:00
|
|
|
/* ======================================================================= */
|
|
|
|
|
2020-08-18 09:22:20 +02:00
|
|
|
#if defined __i386__
|
|
|
|
# define systemd_NR_bpf 357
|
|
|
|
#elif defined __x86_64__
|
|
|
|
# define systemd_NR_bpf 321
|
|
|
|
#elif defined __aarch64__
|
|
|
|
# define systemd_NR_bpf 280
|
|
|
|
#elif defined __arm__
|
|
|
|
# define systemd_NR_bpf 386
|
2020-08-22 16:38:29 +02:00
|
|
|
#elif defined(__powerpc__)
|
|
|
|
# define systemd_NR_bpf 361
|
2020-08-18 09:22:20 +02:00
|
|
|
#elif defined __sparc__
|
|
|
|
# define systemd_NR_bpf 349
|
|
|
|
#elif defined __s390__
|
|
|
|
# define systemd_NR_bpf 351
|
|
|
|
#elif defined __tilegx__
|
|
|
|
# define systemd_NR_bpf 280
|
|
|
|
#else
|
|
|
|
# warning "bpf() syscall number unknown for your architecture"
|
|
|
|
#endif
|
|
|
|
|
2019-08-15 03:08:36 +02:00
|
|
|
/* may be (invalid) negative number due to libseccomp, see PR 13319 */
|
2020-08-18 09:22:20 +02:00
|
|
|
#if defined __NR_bpf && __NR_bpf >= 0
|
|
|
|
# if defined systemd_NR_bpf
|
|
|
|
assert_cc(__NR_bpf == systemd_NR_bpf);
|
|
|
|
# endif
|
|
|
|
#else
|
|
|
|
# if defined __NR_bpf
|
|
|
|
# undef __NR_bpf
|
2016-10-18 17:57:10 +02:00
|
|
|
# endif
|
2020-08-18 09:22:20 +02:00
|
|
|
# if defined systemd_NR_bpf
|
|
|
|
# define __NR_bpf systemd_NR_bpf
|
|
|
|
# endif
|
|
|
|
#endif
|
2016-10-18 17:57:10 +02:00
|
|
|
|
2020-08-18 09:22:20 +02:00
|
|
|
#if !HAVE_BPF
|
2016-10-18 17:57:10 +02:00
|
|
|
union bpf_attr;
|
|
|
|
|
missing_syscall: when adding syscall replacements, use different names (#8229)
In meson.build we check that functions are available using:
meson.get_compiler('c').has_function('foo')
which checks the following:
- if __stub_foo or __stub___foo are defined, return false
- if foo is declared (a pointer to the function can be taken), return true
- otherwise check for __builtin_memfd_create
_stub is documented by glibc as
It defines a symbol '__stub_FUNCTION' for each function
in the C library which is a stub, meaning it will fail
every time called, usually setting errno to ENOSYS.
So if __stub is defined, we know we don't want to use the glibc version, but
this doesn't tell us if the name itself is defined or not. If it _is_ defined,
and we define our replacement as an inline static function, we get an error:
In file included from ../src/basic/missing.h:1358:0,
from ../src/basic/util.h:47,
from ../src/basic/calendarspec.h:29,
from ../src/basic/calendarspec.c:34:
../src/basic/missing_syscall.h:65:19: error: static declaration of 'memfd_create' follows non-static declaration
static inline int memfd_create(const char *name, unsigned int flags) {
^~~~~~~~~~~~
.../usr/include/bits/mman-shared.h:46:5: note: previous declaration of 'memfd_create' was here
int memfd_create (const char *__name, unsigned int __flags) __THROW;
^~~~~~~~~~~~
To avoid this problem, call our inline functions different than glibc,
and use a #define to map the official name to our replacement.
Fixes #8099.
v2:
- use "missing_" as the prefix instead of "_"
v3:
- rebase and update for statx()
Unfortunately "statx" is also present in "struct statx", so the define
causes issues. Work around this by using a typedef.
I checked that systemd compiles with current glibc
(glibc-devel-2.26-24.fc27.x86_64) if HAVE_MEMFD_CREATE, HAVE_GETTID,
HAVE_PIVOT_ROOT, HAVE_SETNS, HAVE_RENAMEAT2, HAVE_KCMP, HAVE_KEYCTL,
HAVE_COPY_FILE_RANGE, HAVE_BPF, HAVE_STATX are forced to 0.
Setting HAVE_NAME_TO_HANDLE_AT to 0 causes an issue, but it's not because of
the define, but because of struct file_handle.
2018-02-21 14:04:50 +01:00
|
|
|
static inline int missing_bpf(int cmd, union bpf_attr *attr, size_t size) {
|
2016-10-18 17:57:10 +02:00
|
|
|
#ifdef __NR_bpf
|
|
|
|
return (int) syscall(__NR_bpf, cmd, attr, size);
|
|
|
|
#else
|
|
|
|
errno = ENOSYS;
|
|
|
|
return -1;
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
|
missing_syscall: when adding syscall replacements, use different names (#8229)
In meson.build we check that functions are available using:
meson.get_compiler('c').has_function('foo')
which checks the following:
- if __stub_foo or __stub___foo are defined, return false
- if foo is declared (a pointer to the function can be taken), return true
- otherwise check for __builtin_memfd_create
_stub is documented by glibc as
It defines a symbol '__stub_FUNCTION' for each function
in the C library which is a stub, meaning it will fail
every time called, usually setting errno to ENOSYS.
So if __stub is defined, we know we don't want to use the glibc version, but
this doesn't tell us if the name itself is defined or not. If it _is_ defined,
and we define our replacement as an inline static function, we get an error:
In file included from ../src/basic/missing.h:1358:0,
from ../src/basic/util.h:47,
from ../src/basic/calendarspec.h:29,
from ../src/basic/calendarspec.c:34:
../src/basic/missing_syscall.h:65:19: error: static declaration of 'memfd_create' follows non-static declaration
static inline int memfd_create(const char *name, unsigned int flags) {
^~~~~~~~~~~~
.../usr/include/bits/mman-shared.h:46:5: note: previous declaration of 'memfd_create' was here
int memfd_create (const char *__name, unsigned int __flags) __THROW;
^~~~~~~~~~~~
To avoid this problem, call our inline functions different than glibc,
and use a #define to map the official name to our replacement.
Fixes #8099.
v2:
- use "missing_" as the prefix instead of "_"
v3:
- rebase and update for statx()
Unfortunately "statx" is also present in "struct statx", so the define
causes issues. Work around this by using a typedef.
I checked that systemd compiles with current glibc
(glibc-devel-2.26-24.fc27.x86_64) if HAVE_MEMFD_CREATE, HAVE_GETTID,
HAVE_PIVOT_ROOT, HAVE_SETNS, HAVE_RENAMEAT2, HAVE_KCMP, HAVE_KEYCTL,
HAVE_COPY_FILE_RANGE, HAVE_BPF, HAVE_STATX are forced to 0.
Setting HAVE_NAME_TO_HANDLE_AT to 0 causes an issue, but it's not because of
the define, but because of struct file_handle.
2018-02-21 14:04:50 +01:00
|
|
|
# define bpf missing_bpf
|
2016-10-18 17:57:10 +02:00
|
|
|
#endif
|
2017-11-13 09:27:53 +01:00
|
|
|
|
|
|
|
/* ======================================================================= */
|
|
|
|
|
|
|
|
#ifndef __IGNORE_pkey_mprotect
|
2020-08-18 09:22:20 +02:00
|
|
|
# if defined __i386__
|
|
|
|
# define systemd_NR_pkey_mprotect 380
|
|
|
|
# elif defined __x86_64__
|
|
|
|
# define systemd_NR_pkey_mprotect 329
|
|
|
|
# elif defined __aarch64__
|
2020-08-22 16:55:56 +02:00
|
|
|
# define systemd_NR_pkey_mprotect 288
|
|
|
|
# elif defined __arm__
|
2020-08-18 09:22:20 +02:00
|
|
|
# define systemd_NR_pkey_mprotect 394
|
|
|
|
# elif defined __powerpc__
|
|
|
|
# define systemd_NR_pkey_mprotect 386
|
|
|
|
# elif defined __s390__
|
|
|
|
# define systemd_NR_pkey_mprotect 384
|
|
|
|
# elif defined _MIPS_SIM
|
|
|
|
# if _MIPS_SIM == _MIPS_SIM_ABI32
|
|
|
|
# define systemd_NR_pkey_mprotect 4363
|
|
|
|
# endif
|
|
|
|
# if _MIPS_SIM == _MIPS_SIM_NABI32
|
|
|
|
# define systemd_NR_pkey_mprotect 6327
|
|
|
|
# endif
|
|
|
|
# if _MIPS_SIM == _MIPS_SIM_ABI64
|
|
|
|
# define systemd_NR_pkey_mprotect 5323
|
|
|
|
# endif
|
|
|
|
# else
|
|
|
|
# warning "pkey_mprotect() syscall number unknown for your architecture"
|
|
|
|
# endif
|
|
|
|
|
2019-08-15 03:08:36 +02:00
|
|
|
/* may be (invalid) negative number due to libseccomp, see PR 13319 */
|
2020-08-18 09:22:20 +02:00
|
|
|
# if defined __NR_pkey_mprotect && __NR_pkey_mprotect >= 0
|
|
|
|
# if defined systemd_NR_pkey_mprotect
|
|
|
|
assert_cc(__NR_pkey_mprotect == systemd_NR_pkey_mprotect);
|
|
|
|
# endif
|
|
|
|
# else
|
2019-07-25 13:57:30 +02:00
|
|
|
# if defined __NR_pkey_mprotect
|
|
|
|
# undef __NR_pkey_mprotect
|
|
|
|
# endif
|
2020-08-18 09:22:20 +02:00
|
|
|
# if defined systemd_NR_pkey_mprotect
|
|
|
|
# define __NR_pkey_mprotect systemd_NR_pkey_mprotect
|
2017-11-13 09:27:53 +01:00
|
|
|
# endif
|
|
|
|
# endif
|
|
|
|
#endif
|
2018-02-20 12:48:33 +01:00
|
|
|
|
missing_syscall: when adding syscall replacements, use different names (#8229)
In meson.build we check that functions are available using:
meson.get_compiler('c').has_function('foo')
which checks the following:
- if __stub_foo or __stub___foo are defined, return false
- if foo is declared (a pointer to the function can be taken), return true
- otherwise check for __builtin_memfd_create
_stub is documented by glibc as
It defines a symbol '__stub_FUNCTION' for each function
in the C library which is a stub, meaning it will fail
every time called, usually setting errno to ENOSYS.
So if __stub is defined, we know we don't want to use the glibc version, but
this doesn't tell us if the name itself is defined or not. If it _is_ defined,
and we define our replacement as an inline static function, we get an error:
In file included from ../src/basic/missing.h:1358:0,
from ../src/basic/util.h:47,
from ../src/basic/calendarspec.h:29,
from ../src/basic/calendarspec.c:34:
../src/basic/missing_syscall.h:65:19: error: static declaration of 'memfd_create' follows non-static declaration
static inline int memfd_create(const char *name, unsigned int flags) {
^~~~~~~~~~~~
.../usr/include/bits/mman-shared.h:46:5: note: previous declaration of 'memfd_create' was here
int memfd_create (const char *__name, unsigned int __flags) __THROW;
^~~~~~~~~~~~
To avoid this problem, call our inline functions different than glibc,
and use a #define to map the official name to our replacement.
Fixes #8099.
v2:
- use "missing_" as the prefix instead of "_"
v3:
- rebase and update for statx()
Unfortunately "statx" is also present in "struct statx", so the define
causes issues. Work around this by using a typedef.
I checked that systemd compiles with current glibc
(glibc-devel-2.26-24.fc27.x86_64) if HAVE_MEMFD_CREATE, HAVE_GETTID,
HAVE_PIVOT_ROOT, HAVE_SETNS, HAVE_RENAMEAT2, HAVE_KCMP, HAVE_KEYCTL,
HAVE_COPY_FILE_RANGE, HAVE_BPF, HAVE_STATX are forced to 0.
Setting HAVE_NAME_TO_HANDLE_AT to 0 causes an issue, but it's not because of
the define, but because of struct file_handle.
2018-02-21 14:04:50 +01:00
|
|
|
/* ======================================================================= */
|
|
|
|
|
2020-08-22 16:55:56 +02:00
|
|
|
#if defined __aarch64__
|
|
|
|
# define systemd_NR_statx 291
|
|
|
|
#elif defined __arm__
|
2020-08-18 09:22:20 +02:00
|
|
|
# define systemd_NR_statx 397
|
|
|
|
#elif defined __alpha__
|
|
|
|
# define systemd_NR_statx 522
|
|
|
|
#elif defined __i386__ || defined __powerpc64__
|
|
|
|
# define systemd_NR_statx 383
|
2020-08-22 16:38:29 +02:00
|
|
|
#elif defined __s390__ || defined __s390x__
|
|
|
|
# define systemd_NR_statx 379
|
2020-08-18 09:22:20 +02:00
|
|
|
#elif defined __sparc__
|
|
|
|
# define systemd_NR_statx 360
|
|
|
|
#elif defined __x86_64__
|
|
|
|
# define systemd_NR_statx 332
|
|
|
|
#else
|
|
|
|
# warning "statx() syscall number unknown for your architecture"
|
|
|
|
#endif
|
|
|
|
|
2019-08-15 03:08:36 +02:00
|
|
|
/* may be (invalid) negative number due to libseccomp, see PR 13319 */
|
2020-08-18 09:22:20 +02:00
|
|
|
#if defined __NR_statx && __NR_statx >= 0
|
|
|
|
# if defined systemd_NR_statx
|
|
|
|
assert_cc(__NR_statx == systemd_NR_statx);
|
|
|
|
# endif
|
|
|
|
#else
|
|
|
|
# if defined __NR_statx
|
|
|
|
# undef __NR_statx
|
|
|
|
# endif
|
|
|
|
# if defined systemd_NR_statx
|
|
|
|
# define __NR_statx systemd_NR_statx
|
2018-02-20 12:48:33 +01:00
|
|
|
# endif
|
missing_syscall: when adding syscall replacements, use different names (#8229)
In meson.build we check that functions are available using:
meson.get_compiler('c').has_function('foo')
which checks the following:
- if __stub_foo or __stub___foo are defined, return false
- if foo is declared (a pointer to the function can be taken), return true
- otherwise check for __builtin_memfd_create
_stub is documented by glibc as
It defines a symbol '__stub_FUNCTION' for each function
in the C library which is a stub, meaning it will fail
every time called, usually setting errno to ENOSYS.
So if __stub is defined, we know we don't want to use the glibc version, but
this doesn't tell us if the name itself is defined or not. If it _is_ defined,
and we define our replacement as an inline static function, we get an error:
In file included from ../src/basic/missing.h:1358:0,
from ../src/basic/util.h:47,
from ../src/basic/calendarspec.h:29,
from ../src/basic/calendarspec.c:34:
../src/basic/missing_syscall.h:65:19: error: static declaration of 'memfd_create' follows non-static declaration
static inline int memfd_create(const char *name, unsigned int flags) {
^~~~~~~~~~~~
.../usr/include/bits/mman-shared.h:46:5: note: previous declaration of 'memfd_create' was here
int memfd_create (const char *__name, unsigned int __flags) __THROW;
^~~~~~~~~~~~
To avoid this problem, call our inline functions different than glibc,
and use a #define to map the official name to our replacement.
Fixes #8099.
v2:
- use "missing_" as the prefix instead of "_"
v3:
- rebase and update for statx()
Unfortunately "statx" is also present in "struct statx", so the define
causes issues. Work around this by using a typedef.
I checked that systemd compiles with current glibc
(glibc-devel-2.26-24.fc27.x86_64) if HAVE_MEMFD_CREATE, HAVE_GETTID,
HAVE_PIVOT_ROOT, HAVE_SETNS, HAVE_RENAMEAT2, HAVE_KCMP, HAVE_KEYCTL,
HAVE_COPY_FILE_RANGE, HAVE_BPF, HAVE_STATX are forced to 0.
Setting HAVE_NAME_TO_HANDLE_AT to 0 causes an issue, but it's not because of
the define, but because of struct file_handle.
2018-02-21 14:04:50 +01:00
|
|
|
#endif
|
|
|
|
|
|
|
|
#if !HAVE_STATX
|
2020-08-18 09:22:20 +02:00
|
|
|
struct statx;
|
|
|
|
|
missing_syscall: when adding syscall replacements, use different names (#8229)
In meson.build we check that functions are available using:
meson.get_compiler('c').has_function('foo')
which checks the following:
- if __stub_foo or __stub___foo are defined, return false
- if foo is declared (a pointer to the function can be taken), return true
- otherwise check for __builtin_memfd_create
_stub is documented by glibc as
It defines a symbol '__stub_FUNCTION' for each function
in the C library which is a stub, meaning it will fail
every time called, usually setting errno to ENOSYS.
So if __stub is defined, we know we don't want to use the glibc version, but
this doesn't tell us if the name itself is defined or not. If it _is_ defined,
and we define our replacement as an inline static function, we get an error:
In file included from ../src/basic/missing.h:1358:0,
from ../src/basic/util.h:47,
from ../src/basic/calendarspec.h:29,
from ../src/basic/calendarspec.c:34:
../src/basic/missing_syscall.h:65:19: error: static declaration of 'memfd_create' follows non-static declaration
static inline int memfd_create(const char *name, unsigned int flags) {
^~~~~~~~~~~~
.../usr/include/bits/mman-shared.h:46:5: note: previous declaration of 'memfd_create' was here
int memfd_create (const char *__name, unsigned int __flags) __THROW;
^~~~~~~~~~~~
To avoid this problem, call our inline functions different than glibc,
and use a #define to map the official name to our replacement.
Fixes #8099.
v2:
- use "missing_" as the prefix instead of "_"
v3:
- rebase and update for statx()
Unfortunately "statx" is also present in "struct statx", so the define
causes issues. Work around this by using a typedef.
I checked that systemd compiles with current glibc
(glibc-devel-2.26-24.fc27.x86_64) if HAVE_MEMFD_CREATE, HAVE_GETTID,
HAVE_PIVOT_ROOT, HAVE_SETNS, HAVE_RENAMEAT2, HAVE_KCMP, HAVE_KEYCTL,
HAVE_COPY_FILE_RANGE, HAVE_BPF, HAVE_STATX are forced to 0.
Setting HAVE_NAME_TO_HANDLE_AT to 0 causes an issue, but it's not because of
the define, but because of struct file_handle.
2018-02-21 14:04:50 +01:00
|
|
|
static inline ssize_t missing_statx(int dfd, const char *filename, unsigned flags, unsigned int mask, struct statx *buffer) {
|
2018-02-20 12:48:33 +01:00
|
|
|
# ifdef __NR_statx
|
|
|
|
return syscall(__NR_statx, dfd, filename, flags, mask, buffer);
|
|
|
|
# else
|
|
|
|
errno = ENOSYS;
|
|
|
|
return -1;
|
|
|
|
# endif
|
|
|
|
}
|
2020-08-18 09:22:20 +02:00
|
|
|
#endif
|
|
|
|
|
|
|
|
/* This typedef is supposed to be always defined. */
|
|
|
|
typedef struct statx struct_statx;
|
missing_syscall: when adding syscall replacements, use different names (#8229)
In meson.build we check that functions are available using:
meson.get_compiler('c').has_function('foo')
which checks the following:
- if __stub_foo or __stub___foo are defined, return false
- if foo is declared (a pointer to the function can be taken), return true
- otherwise check for __builtin_memfd_create
_stub is documented by glibc as
It defines a symbol '__stub_FUNCTION' for each function
in the C library which is a stub, meaning it will fail
every time called, usually setting errno to ENOSYS.
So if __stub is defined, we know we don't want to use the glibc version, but
this doesn't tell us if the name itself is defined or not. If it _is_ defined,
and we define our replacement as an inline static function, we get an error:
In file included from ../src/basic/missing.h:1358:0,
from ../src/basic/util.h:47,
from ../src/basic/calendarspec.h:29,
from ../src/basic/calendarspec.c:34:
../src/basic/missing_syscall.h:65:19: error: static declaration of 'memfd_create' follows non-static declaration
static inline int memfd_create(const char *name, unsigned int flags) {
^~~~~~~~~~~~
.../usr/include/bits/mman-shared.h:46:5: note: previous declaration of 'memfd_create' was here
int memfd_create (const char *__name, unsigned int __flags) __THROW;
^~~~~~~~~~~~
To avoid this problem, call our inline functions different than glibc,
and use a #define to map the official name to our replacement.
Fixes #8099.
v2:
- use "missing_" as the prefix instead of "_"
v3:
- rebase and update for statx()
Unfortunately "statx" is also present in "struct statx", so the define
causes issues. Work around this by using a typedef.
I checked that systemd compiles with current glibc
(glibc-devel-2.26-24.fc27.x86_64) if HAVE_MEMFD_CREATE, HAVE_GETTID,
HAVE_PIVOT_ROOT, HAVE_SETNS, HAVE_RENAMEAT2, HAVE_KCMP, HAVE_KEYCTL,
HAVE_COPY_FILE_RANGE, HAVE_BPF, HAVE_STATX are forced to 0.
Setting HAVE_NAME_TO_HANDLE_AT to 0 causes an issue, but it's not because of
the define, but because of struct file_handle.
2018-02-21 14:04:50 +01:00
|
|
|
|
2020-08-18 09:22:20 +02:00
|
|
|
#if !HAVE_STATX
|
2020-08-05 23:28:21 +02:00
|
|
|
# define statx(dfd, filename, flags, mask, buffer) missing_statx(dfd, filename, flags, mask, buffer)
|
2018-02-20 12:48:33 +01:00
|
|
|
#endif
|
2019-03-12 18:58:26 +01:00
|
|
|
|
2020-08-18 09:22:20 +02:00
|
|
|
/* ======================================================================= */
|
2019-03-12 18:58:26 +01:00
|
|
|
|
2020-08-18 09:22:20 +02:00
|
|
|
#if !HAVE_SET_MEMPOLICY
|
2019-03-12 18:58:26 +01:00
|
|
|
enum {
|
|
|
|
MPOL_DEFAULT,
|
|
|
|
MPOL_PREFERRED,
|
|
|
|
MPOL_BIND,
|
|
|
|
MPOL_INTERLEAVE,
|
|
|
|
MPOL_LOCAL,
|
|
|
|
};
|
|
|
|
|
|
|
|
static inline long missing_set_mempolicy(int mode, const unsigned long *nodemask,
|
|
|
|
unsigned long maxnode) {
|
|
|
|
long i;
|
2019-12-06 20:28:13 +01:00
|
|
|
# if defined __NR_set_mempolicy && __NR_set_mempolicy >= 0
|
2019-03-12 18:58:26 +01:00
|
|
|
i = syscall(__NR_set_mempolicy, mode, nodemask, maxnode);
|
|
|
|
# else
|
|
|
|
errno = ENOSYS;
|
|
|
|
i = -1;
|
|
|
|
# endif
|
|
|
|
return i;
|
|
|
|
}
|
|
|
|
|
|
|
|
# define set_mempolicy missing_set_mempolicy
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#if !HAVE_GET_MEMPOLICY
|
|
|
|
static inline long missing_get_mempolicy(int *mode, unsigned long *nodemask,
|
|
|
|
unsigned long maxnode, void *addr,
|
|
|
|
unsigned long flags) {
|
|
|
|
long i;
|
2020-08-15 18:54:18 +02:00
|
|
|
# if defined __NR_get_mempolicy && __NR_get_mempolicy >= 0
|
2019-03-12 18:58:26 +01:00
|
|
|
i = syscall(__NR_get_mempolicy, mode, nodemask, maxnode, addr, flags);
|
|
|
|
# else
|
|
|
|
errno = ENOSYS;
|
|
|
|
i = -1;
|
|
|
|
# endif
|
|
|
|
return i;
|
|
|
|
}
|
|
|
|
|
2020-08-16 16:19:29 +02:00
|
|
|
# define get_mempolicy missing_get_mempolicy
|
2019-03-12 18:58:26 +01:00
|
|
|
#endif
|
2019-10-25 16:06:06 +02:00
|
|
|
|
2020-08-18 09:22:20 +02:00
|
|
|
/* ======================================================================= */
|
|
|
|
|
2020-08-15 19:01:23 +02:00
|
|
|
/* should be always defined, see kernel 39036cd2727395c3369b1051005da74059a85317 */
|
2020-08-18 09:22:20 +02:00
|
|
|
#if defined(__alpha__)
|
|
|
|
# define systemd_NR_pidfd_send_signal 534
|
|
|
|
#else
|
|
|
|
# define systemd_NR_pidfd_send_signal 424
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/* may be (invalid) negative number due to libseccomp, see PR 13319 */
|
|
|
|
#if defined __NR_pidfd_send_signal && __NR_pidfd_send_signal >= 0
|
|
|
|
# if defined systemd_NR_pidfd_send_signal
|
|
|
|
assert_cc(__NR_pidfd_send_signal == systemd_NR_pidfd_send_signal);
|
2020-08-15 19:01:23 +02:00
|
|
|
# endif
|
2020-08-18 09:22:20 +02:00
|
|
|
#else
|
|
|
|
# if defined __NR_pidfd_send_signal
|
|
|
|
# undef __NR_pidfd_send_signal
|
|
|
|
# endif
|
|
|
|
# define __NR_pidfd_send_signal systemd_NR_pidfd_send_signal
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#if !HAVE_PIDFD_SEND_SIGNAL
|
2020-08-16 16:19:29 +02:00
|
|
|
static inline int missing_pidfd_send_signal(int fd, int sig, siginfo_t *info, unsigned flags) {
|
2020-08-15 19:01:23 +02:00
|
|
|
# ifdef __NR_pidfd_open
|
2019-10-25 16:06:06 +02:00
|
|
|
return syscall(__NR_pidfd_send_signal, fd, sig, info, flags);
|
2020-08-15 19:01:23 +02:00
|
|
|
# else
|
2019-10-25 16:06:06 +02:00
|
|
|
errno = ENOSYS;
|
|
|
|
return -1;
|
2020-08-15 19:01:23 +02:00
|
|
|
# endif
|
|
|
|
}
|
2020-08-16 16:19:29 +02:00
|
|
|
|
|
|
|
# define pidfd_send_signal missing_pidfd_send_signal
|
2019-10-25 16:06:06 +02:00
|
|
|
#endif
|
2020-08-15 19:01:23 +02:00
|
|
|
|
|
|
|
/* should be always defined, see kernel 7615d9e1780e26e0178c93c55b73309a5dc093d7 */
|
2020-08-18 09:22:20 +02:00
|
|
|
#if defined(__alpha__)
|
|
|
|
# define systemd_NR_pidfd_open 544
|
|
|
|
#else
|
|
|
|
# define systemd_NR_pidfd_open 434
|
|
|
|
#endif
|
|
|
|
|
|
|
|
/* may be (invalid) negative number due to libseccomp, see PR 13319 */
|
|
|
|
#if defined __NR_pidfd_open && __NR_pidfd_open >= 0
|
|
|
|
# if defined systemd_NR_pidfd_open
|
|
|
|
assert_cc(__NR_pidfd_open == systemd_NR_pidfd_open);
|
2020-08-15 19:01:23 +02:00
|
|
|
# endif
|
2020-08-18 09:22:20 +02:00
|
|
|
#else
|
|
|
|
# if defined __NR_pidfd_open
|
|
|
|
# undef __NR_pidfd_open
|
|
|
|
# endif
|
|
|
|
# define __NR_pidfd_open systemd_NR_pidfd_open
|
|
|
|
#endif
|
|
|
|
|
|
|
|
#if !HAVE_PIDFD_OPEN
|
2020-08-16 16:19:29 +02:00
|
|
|
static inline int missing_pidfd_open(pid_t pid, unsigned flags) {
|
2020-08-15 19:01:23 +02:00
|
|
|
# ifdef __NR_pidfd_open
|
|
|
|
return syscall(__NR_pidfd_open, pid, flags);
|
|
|
|
# else
|
|
|
|
errno = ENOSYS;
|
|
|
|
return -1;
|
|
|
|
# endif
|
2019-10-25 16:06:06 +02:00
|
|
|
}
|
2020-08-16 16:19:29 +02:00
|
|
|
|
|
|
|
# define pidfd_open missing_pidfd_open
|
2019-10-25 16:06:06 +02:00
|
|
|
#endif
|
2019-10-30 16:29:42 +01:00
|
|
|
|
2020-08-18 09:22:20 +02:00
|
|
|
/* ======================================================================= */
|
|
|
|
|
2019-10-30 16:29:42 +01:00
|
|
|
#if !HAVE_RT_SIGQUEUEINFO
|
2020-08-16 16:19:29 +02:00
|
|
|
static inline int missing_rt_sigqueueinfo(pid_t tgid, int sig, siginfo_t *info) {
|
2020-08-18 09:22:20 +02:00
|
|
|
# if defined __NR_rt_sigqueueinfo && __NR_rt_sigqueueinfo >= 0
|
2019-10-30 16:29:42 +01:00
|
|
|
return syscall(__NR_rt_sigqueueinfo, tgid, sig, info);
|
2020-08-18 09:22:20 +02:00
|
|
|
# else
|
|
|
|
# error "__NR_rt_sigqueueinfo not defined"
|
|
|
|
# endif
|
2019-10-30 16:29:42 +01:00
|
|
|
}
|
2020-08-16 16:19:29 +02:00
|
|
|
|
|
|
|
# define rt_sigqueueinfo missing_rt_sigqueueinfo
|
2019-10-30 16:29:42 +01:00
|
|
|
#endif
|