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nptl: Introduce <tcb-access.h> for THREAD_* accessors

Browse source 
These are common between most architectures.  Only the x86 targets
are outliers.

Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com>
This commit is contained in:
Florian Weimer 2021-12-09 09:49:32 +01:00
parent 8dbeb0561e
commit ce2248ab91
21 changed files with 301 additions and 376 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
sysdeps/aarch64/nptl/tls.h
View file

@ -98,15 +98,7 @@ typedef struct
# define DB_THREAD_SELF \
CONST_THREAD_AREA (64, sizeof (struct pthread))
/* Access to data in the thread descriptor is easy. */
# define THREAD_GETMEM(descr, member) \
descr->member
# define THREAD_GETMEM_NC(descr, member, idx) \
descr->member[idx]
# define THREAD_SETMEM(descr, member, value) \
descr->member = (value)
# define THREAD_SETMEM_NC(descr, member, idx, value) \
descr->member[idx] = (value)
# include <tcb-access.h>
/* Get and set the global scope generation counter in struct pthread. */
# define THREAD_GSCOPE_FLAG_UNUSED 0

10
sysdeps/alpha/nptl/tls.h
View file

@ -92,15 +92,7 @@ typedef struct
# define DB_THREAD_SELF \
REGISTER (64, 64, 32 * 8, -sizeof (struct pthread))
/* Access to data in the thread descriptor is easy. */
#define THREAD_GETMEM(descr, member) \
descr->member
#define THREAD_GETMEM_NC(descr, member, idx) \
descr->member[idx]
#define THREAD_SETMEM(descr, member, value) \
descr->member = (value)
#define THREAD_SETMEM_NC(descr, member, idx, value) \
descr->member[idx] = (value)
# include <tcb-access.h>
/* Get and set the global scope generation counter in struct pthread. */
#define THREAD_GSCOPE_FLAG_UNUSED 0

10
sysdeps/arc/nptl/tls.h
View file

@ -100,15 +100,7 @@ typedef struct
# define DB_THREAD_SELF \
CONST_THREAD_AREA (32, sizeof (struct pthread))
/* Access to data in the thread descriptor is easy. */
# define THREAD_GETMEM(descr, member) \
descr->member
# define THREAD_GETMEM_NC(descr, member, idx) \
descr->member[idx]
# define THREAD_SETMEM(descr, member, value) \
descr->member = (value)
# define THREAD_SETMEM_NC(descr, member, idx, value) \
descr->member[idx] = (value)
# include <tcb-access.h>
/* Get and set the global scope generation counter in struct pthread. */
#define THREAD_GSCOPE_FLAG_UNUSED 0

10
sysdeps/arm/nptl/tls.h
View file

@ -89,15 +89,7 @@ typedef struct
# define DB_THREAD_SELF \
CONST_THREAD_AREA (32, sizeof (struct pthread))
/* Access to data in the thread descriptor is easy. */
#define THREAD_GETMEM(descr, member) \
descr->member
#define THREAD_GETMEM_NC(descr, member, idx) \
descr->member[idx]
#define THREAD_SETMEM(descr, member, value) \
descr->member = (value)
#define THREAD_SETMEM_NC(descr, member, idx, value) \
descr->member[idx] = (value)
# include <tcb-access.h>
/* Get and set the global scope generation counter in struct pthread. */
#define THREAD_GSCOPE_FLAG_UNUSED 0

10
sysdeps/csky/nptl/tls.h
View file

@ -116,15 +116,7 @@ typedef struct
# define DB_THREAD_SELF \
CONST_THREAD_AREA (32, sizeof (struct pthread))
/* Access to data in the thread descriptor is easy. */
# define THREAD_GETMEM(descr, member) \
descr->member
# define THREAD_GETMEM_NC(descr, member, idx) \
descr->member[idx]
# define THREAD_SETMEM(descr, member, value) \
descr->member = (value)
# define THREAD_SETMEM_NC(descr, member, idx, value) \
descr->member[idx] = (value)
# include <tcb-access.h>
/* Get and set the global scope generation counter in struct pthread. */
# define THREAD_GSCOPE_FLAG_UNUSED 0

10
sysdeps/hppa/nptl/tls.h
View file

@ -107,15 +107,7 @@ typedef struct
# define DB_THREAD_SELF \
REGISTER (32, 32, 53 * 4, -sizeof (struct pthread))
/* Access to data in the thread descriptor is easy. */
# define THREAD_GETMEM(descr, member) \
descr->member
# define THREAD_GETMEM_NC(descr, member, idx) \
descr->member[idx]
# define THREAD_SETMEM(descr, member, value) \
descr->member = (value)
# define THREAD_SETMEM_NC(descr, member, idx, value) \
descr->member[idx] = (value)
# include <tcb-access.h>
static inline struct pthread *__get_cr27(void)
{

123
sysdeps/i386/nptl/tcb-access.h Normal file
View file

@ -0,0 +1,123 @@
/* THREAD_* accessors. i386 version.
Copyright (C) 2002-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
/* Read member of the thread descriptor directly. */
#define THREAD_GETMEM(descr, member) \
({ __typeof (descr->member) __value; \
_Static_assert (sizeof (__value) == 1 \
|| sizeof (__value) == 4 \
|| sizeof (__value) == 8, \
"size of per-thread data"); \
if (sizeof (__value) == 1) \
asm volatile ("movb %%gs:%P2,%b0" \
: "=q" (__value) \
: "0" (0), "i" (offsetof (struct pthread, member))); \
else if (sizeof (__value) == 4) \
asm volatile ("movl %%gs:%P1,%0" \
: "=r" (__value) \
: "i" (offsetof (struct pthread, member))); \
else /* 8 */ \
{ \
asm volatile ("movl %%gs:%P1,%%eax\n\t" \
"movl %%gs:%P2,%%edx" \
: "=A" (__value) \
: "i" (offsetof (struct pthread, member)), \
"i" (offsetof (struct pthread, member) + 4)); \
} \
__value; })
/* Same as THREAD_GETMEM, but the member offset can be non-constant. */
#define THREAD_GETMEM_NC(descr, member, idx) \
({ __typeof (descr->member[0]) __value; \
_Static_assert (sizeof (__value) == 1 \
|| sizeof (__value) == 4 \
|| sizeof (__value) == 8, \
"size of per-thread data"); \
if (sizeof (__value) == 1) \
asm volatile ("movb %%gs:%P2(%3),%b0" \
: "=q" (__value) \
: "0" (0), "i" (offsetof (struct pthread, member[0])), \
"r" (idx)); \
else if (sizeof (__value) == 4) \
asm volatile ("movl %%gs:%P1(,%2,4),%0" \
: "=r" (__value) \
: "i" (offsetof (struct pthread, member[0])), \
"r" (idx)); \
else /* 8 */ \
{ \
asm volatile ("movl %%gs:%P1(,%2,8),%%eax\n\t" \
"movl %%gs:4+%P1(,%2,8),%%edx" \
: "=&A" (__value) \
: "i" (offsetof (struct pthread, member[0])), \
"r" (idx)); \
} \
__value; })
/* Set member of the thread descriptor directly. */
#define THREAD_SETMEM(descr, member, value) \
({ \
_Static_assert (sizeof (descr->member) == 1 \
|| sizeof (descr->member) == 4 \
|| sizeof (descr->member) == 8, \
"size of per-thread data"); \
if (sizeof (descr->member) == 1) \
asm volatile ("movb %b0,%%gs:%P1" : \
: "iq" (value), \
"i" (offsetof (struct pthread, member))); \
else if (sizeof (descr->member) == 4) \
asm volatile ("movl %0,%%gs:%P1" : \
: "ir" (value), \
"i" (offsetof (struct pthread, member))); \
else /* 8 */ \
{ \
asm volatile ("movl %%eax,%%gs:%P1\n\t" \
"movl %%edx,%%gs:%P2" : \
: "A" ((uint64_t) cast_to_integer (value)), \
"i" (offsetof (struct pthread, member)), \
"i" (offsetof (struct pthread, member) + 4)); \
}})
/* Same as THREAD_SETMEM, but the member offset can be non-constant. */
#define THREAD_SETMEM_NC(descr, member, idx, value) \
({ \
_Static_assert (sizeof (descr->member[0]) == 1 \
|| sizeof (descr->member[0]) == 4 \
|| sizeof (descr->member[0]) == 8, \
"size of per-thread data"); \
if (sizeof (descr->member[0]) == 1) \
asm volatile ("movb %b0,%%gs:%P1(%2)" : \
: "iq" (value), \
"i" (offsetof (struct pthread, member)), \
"r" (idx)); \
else if (sizeof (descr->member[0]) == 4) \
asm volatile ("movl %0,%%gs:%P1(,%2,4)" : \
: "ir" (value), \
"i" (offsetof (struct pthread, member)), \
"r" (idx)); \
else /* 8 */ \
{ \
asm volatile ("movl %%eax,%%gs:%P1(,%2,8)\n\t" \
"movl %%edx,%%gs:4+%P1(,%2,8)" : \
: "A" ((uint64_t) cast_to_integer (value)), \
"i" (offsetof (struct pthread, member)), \
"r" (idx)); \
}})

108
sysdeps/i386/nptl/tls.h
View file

@ -250,113 +250,7 @@ tls_fill_user_desc (union user_desc_init *desc,
REGISTER_THREAD_AREA (32, offsetof (struct user_regs_struct, xgs), 3) \
REGISTER_THREAD_AREA (64, 26 * 8, 3) /* x86-64's user_regs_struct->gs */
/* Read member of the thread descriptor directly. */
# define THREAD_GETMEM(descr, member) \
({ __typeof (descr->member) __value; \
_Static_assert (sizeof (__value) == 1 \
|| sizeof (__value) == 4 \
|| sizeof (__value) == 8, \
"size of per-thread data"); \
if (sizeof (__value) == 1) \
asm volatile ("movb %%gs:%P2,%b0" \
: "=q" (__value) \
: "0" (0), "i" (offsetof (struct pthread, member))); \
else if (sizeof (__value) == 4) \
asm volatile ("movl %%gs:%P1,%0" \
: "=r" (__value) \
: "i" (offsetof (struct pthread, member))); \
else /* 8 */ \
{ \
asm volatile ("movl %%gs:%P1,%%eax\n\t" \
"movl %%gs:%P2,%%edx" \
: "=A" (__value) \
: "i" (offsetof (struct pthread, member)), \
"i" (offsetof (struct pthread, member) + 4)); \
} \
__value; })
/* Same as THREAD_GETMEM, but the member offset can be non-constant. */
# define THREAD_GETMEM_NC(descr, member, idx) \
({ __typeof (descr->member[0]) __value; \
_Static_assert (sizeof (__value) == 1 \
|| sizeof (__value) == 4 \
|| sizeof (__value) == 8, \
"size of per-thread data"); \
if (sizeof (__value) == 1) \
asm volatile ("movb %%gs:%P2(%3),%b0" \
: "=q" (__value) \
: "0" (0), "i" (offsetof (struct pthread, member[0])), \
"r" (idx)); \
else if (sizeof (__value) == 4) \
asm volatile ("movl %%gs:%P1(,%2,4),%0" \
: "=r" (__value) \
: "i" (offsetof (struct pthread, member[0])), \
"r" (idx)); \
else /* 8 */ \
{ \
asm volatile ("movl %%gs:%P1(,%2,8),%%eax\n\t" \
"movl %%gs:4+%P1(,%2,8),%%edx" \
: "=&A" (__value) \
: "i" (offsetof (struct pthread, member[0])), \
"r" (idx)); \
} \
__value; })
/* Set member of the thread descriptor directly. */
# define THREAD_SETMEM(descr, member, value) \
({ \
_Static_assert (sizeof (descr->member) == 1 \
|| sizeof (descr->member) == 4 \
|| sizeof (descr->member) == 8, \
"size of per-thread data"); \
if (sizeof (descr->member) == 1) \
asm volatile ("movb %b0,%%gs:%P1" : \
: "iq" (value), \
"i" (offsetof (struct pthread, member))); \
else if (sizeof (descr->member) == 4) \
asm volatile ("movl %0,%%gs:%P1" : \
: "ir" (value), \
"i" (offsetof (struct pthread, member))); \
else /* 8 */ \
{ \
asm volatile ("movl %%eax,%%gs:%P1\n\t" \
"movl %%edx,%%gs:%P2" : \
: "A" ((uint64_t) cast_to_integer (value)), \
"i" (offsetof (struct pthread, member)), \
"i" (offsetof (struct pthread, member) + 4)); \
}})
/* Same as THREAD_SETMEM, but the member offset can be non-constant. */
# define THREAD_SETMEM_NC(descr, member, idx, value) \
({ \
_Static_assert (sizeof (descr->member[0]) == 1 \
|| sizeof (descr->member[0]) == 4 \
|| sizeof (descr->member[0]) == 8, \
"size of per-thread data"); \
if (sizeof (descr->member[0]) == 1) \
asm volatile ("movb %b0,%%gs:%P1(%2)" : \
: "iq" (value), \
"i" (offsetof (struct pthread, member)), \
"r" (idx)); \
else if (sizeof (descr->member[0]) == 4) \
asm volatile ("movl %0,%%gs:%P1(,%2,4)" : \
: "ir" (value), \
"i" (offsetof (struct pthread, member)), \
"r" (idx)); \
else /* 8 */ \
{ \
asm volatile ("movl %%eax,%%gs:%P1(,%2,8)\n\t" \
"movl %%edx,%%gs:4+%P1(,%2,8)" : \
: "A" ((uint64_t) cast_to_integer (value)), \
"i" (offsetof (struct pthread, member)), \
"r" (idx)); \
}})
# include <tcb-access.h>
/* Set the stack guard field in TCB head. */
#define THREAD_SET_STACK_GUARD(value) \

10
sysdeps/ia64/nptl/tls.h
View file

@ -128,15 +128,7 @@ register struct pthread *__thread_self __asm__("r13");
/* Magic for libthread_db to know how to do THREAD_SELF. */
# define DB_THREAD_SELF REGISTER (64, 64, 13 * 8, -TLS_PRE_TCB_SIZE)
/* Access to data in the thread descriptor is easy. */
#define THREAD_GETMEM(descr, member) \
descr->member
#define THREAD_GETMEM_NC(descr, member, idx) \
descr->member[idx]
#define THREAD_SETMEM(descr, member, value) \
descr->member = (value)
#define THREAD_SETMEM_NC(descr, member, idx, value) \
descr->member[idx] = (value)
# include <tcb-access.h>
/* Set the stack guard field in TCB head. */
#define THREAD_SET_STACK_GUARD(value) \

10
sysdeps/m68k/nptl/tls.h
View file

@ -117,15 +117,7 @@ extern void * __m68k_read_tp (void);
# define DB_THREAD_SELF \
CONST_THREAD_AREA (32, TLS_TCB_OFFSET + TLS_PRE_TCB_SIZE)
/* Access to data in the thread descriptor is easy. */
# define THREAD_GETMEM(descr, member) \
descr->member
# define THREAD_GETMEM_NC(descr, member, idx) \
descr->member[idx]
# define THREAD_SETMEM(descr, member, value) \
descr->member = (value)
# define THREAD_SETMEM_NC(descr, member, idx, value) \
descr->member[idx] = (value)
# include <tcb-access.h>
/* l_tls_offset == 0 is perfectly valid on M68K, so we have to use some
different value to mean unset l_tls_offset. */

15
sysdeps/microblaze/nptl/tls.h
View file

@ -100,20 +100,7 @@ typedef struct
# define DB_THREAD_SELF \
CONST_THREAD_AREA (32, sizeof (struct pthread))
/* Read member of the thread descriptor directly. */
# define THREAD_GETMEM(descr, member) (descr->member)
/* Same as THREAD_GETMEM, but the member offset can be non-constant. */
# define THREAD_GETMEM_NC(descr, member, idx) \
(descr->member[idx])
/* Set member of the thread descriptor directly. */
# define THREAD_SETMEM(descr, member, value) \
(descr->member = (value))
/* Same as THREAD_SETMEM, but the member offset can be non-constant. */
# define THREAD_SETMEM_NC(descr, member, idx, value) \
(descr->member[idx] = (value))
# include <tcb-access.h>
/* Get and set the global scope generation counter in struct pthread. */
# define THREAD_GSCOPE_FLAG_UNUSED 0

9
sysdeps/mips/nptl/tls.h
View file

@ -144,14 +144,7 @@ typedef struct
CONST_THREAD_AREA (32, TLS_TCB_OFFSET + TLS_PRE_TCB_SIZE)
/* Access to data in the thread descriptor is easy. */
# define THREAD_GETMEM(descr, member) \
descr->member
# define THREAD_GETMEM_NC(descr, member, idx) \
descr->member[idx]
# define THREAD_SETMEM(descr, member, value) \
descr->member = (value)
# define THREAD_SETMEM_NC(descr, member, idx, value) \
descr->member[idx] = (value)
# include <tcb-access.h>
/* l_tls_offset == 0 is perfectly valid on MIPS, so we have to use some
different value to mean unset l_tls_offset. */

10
sysdeps/nios2/nptl/tls.h
View file

@ -112,15 +112,7 @@ register struct pthread *__thread_self __asm__("r23");
# define DB_THREAD_SELF \
REGISTER (32, 32, 23 * 4, -TLS_PRE_TCB_SIZE - TLS_TCB_OFFSET)
/* Access to data in the thread descriptor is easy. */
# define THREAD_GETMEM(descr, member) \
descr->member
# define THREAD_GETMEM_NC(descr, member, idx) \
descr->member[idx]
# define THREAD_SETMEM(descr, member, value) \
descr->member = (value)
# define THREAD_SETMEM_NC(descr, member, idx, value) \
descr->member[idx] = (value)
# include <tcb-access.h>
# define THREAD_GET_POINTER_GUARD() \
(((tcbhead_t *) (READ_THREAD_POINTER () \

30
sysdeps/nptl/tcb-access.h Normal file
View file

@ -0,0 +1,30 @@
/* THREAD_* accessors. Generic version based on struct pthread pointers.
Copyright (C) 2002-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
/* Note: These are for accessing the TCB of the *current* thread.
descr can be disregarded on some targets as an optimization. See
i386 for an example. */
#define THREAD_GETMEM(descr, member) \
descr->member
#define THREAD_GETMEM_NC(descr, member, idx) \
descr->member[idx]
#define THREAD_SETMEM(descr, member, value) \
descr->member = (value)
#define THREAD_SETMEM_NC(descr, member, idx, value) \
descr->member[idx] = (value)

15
sysdeps/powerpc/nptl/tls.h
View file

@ -176,20 +176,7 @@ typedef struct
REGISTER (64, 64, PT_THREAD_POINTER * 8, \
- TLS_TCB_OFFSET - TLS_PRE_TCB_SIZE)
/* Read member of the thread descriptor directly. */
# define THREAD_GETMEM(descr, member) ((void)(descr), (THREAD_SELF)->member)
/* Same as THREAD_GETMEM, but the member offset can be non-constant. */
# define THREAD_GETMEM_NC(descr, member, idx) \
((void)(descr), (THREAD_SELF)->member[idx])
/* Set member of the thread descriptor directly. */
# define THREAD_SETMEM(descr, member, value) \
((void)(descr), (THREAD_SELF)->member = (value))
/* Same as THREAD_SETMEM, but the member offset can be non-constant. */
# define THREAD_SETMEM_NC(descr, member, idx, value) \
((void)(descr), (THREAD_SELF)->member[idx] = (value))
# include <tcb-access.h>
/* Set the stack guard field in TCB head. */
# define THREAD_SET_STACK_GUARD(value) \

9
sysdeps/riscv/nptl/tls.h
View file

@ -105,14 +105,7 @@ typedef struct
REGISTER (64, 64, 4 * 8, - TLS_TCB_OFFSET - TLS_PRE_TCB_SIZE)
/* Access to data in the thread descriptor is easy. */
# define THREAD_GETMEM(descr, member) \
descr->member
# define THREAD_GETMEM_NC(descr, member, idx) \
descr->member[idx]
# define THREAD_SETMEM(descr, member, value) \
descr->member = (value)
# define THREAD_SETMEM_NC(descr, member, idx, value) \
descr->member[idx] = (value)
# include <tcb-access.h>
/* l_tls_offset == 0 is perfectly valid, so we have to use some different
value to mean unset l_tls_offset. */

10
sysdeps/s390/nptl/tls.h
View file

@ -135,15 +135,7 @@ typedef struct
# define DB_THREAD_SELF REGISTER (32, 32, 18 * 4, 0) \
REGISTER (64, __WORDSIZE, 18 * 8, 0)
/* Access to data in the thread descriptor is easy. */
#define THREAD_GETMEM(descr, member) \
descr->member
#define THREAD_GETMEM_NC(descr, member, idx) \
descr->member[idx]
#define THREAD_SETMEM(descr, member, value) \
descr->member = (value)
#define THREAD_SETMEM_NC(descr, member, idx, value) \
descr->member[idx] = (value)
# include <tcb-access.h>
/* Set the stack guard field in TCB head. */
#define THREAD_SET_STACK_GUARD(value) \

14
sysdeps/sh/nptl/tls.h
View file

@ -113,19 +113,7 @@ typedef struct
# define DB_THREAD_SELF \
REGISTER (32, 32, REG_GBR * 4, -sizeof (struct pthread))
/* Read member of the thread descriptor directly. */
# define THREAD_GETMEM(descr, member) (descr->member)
/* Same as THREAD_GETMEM, but the member offset can be non-constant. */
# define THREAD_GETMEM_NC(descr, member, idx) (descr->member[idx])
/* Set member of the thread descriptor directly. */
# define THREAD_SETMEM(descr, member, value) \
descr->member = (value)
/* Same as THREAD_SETMEM, but the member offset can be non-constant. */
# define THREAD_SETMEM_NC(descr, member, idx, value) \
descr->member[idx] = (value)
# include <tcb-access.h>
#define THREAD_GET_POINTER_GUARD() \
({ tcbhead_t *__tcbp; \

10
sysdeps/sparc/nptl/tls.h
View file

@ -112,15 +112,7 @@ register struct pthread *__thread_self __asm__("%g7");
REGISTER (32, 32, 10 * 4, 0) \
REGISTER (64, __WORDSIZE, (6 * 8) + (__WORDSIZE==64?0:4), 0)
/* Access to data in the thread descriptor is easy. */
#define THREAD_GETMEM(descr, member) \
descr->member
#define THREAD_GETMEM_NC(descr, member, idx) \
descr->member[idx]
#define THREAD_SETMEM(descr, member, value) \
descr->member = (value)
#define THREAD_SETMEM_NC(descr, member, idx, value) \
descr->member[idx] = (value)
# include <tcb-access.h>
/* Set the stack guard field in TCB head. */
#define THREAD_SET_STACK_GUARD(value) \

130
sysdeps/x86_64/nptl/tcb-access.h Normal file
View file

@ -0,0 +1,130 @@
/* THREAD_* accessors. x86_64 version.
Copyright (C) 2002-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
/* Read member of the thread descriptor directly. */
# define THREAD_GETMEM(descr, member) \
({ __typeof (descr->member) __value; \
_Static_assert (sizeof (__value) == 1 \
|| sizeof (__value) == 4 \
|| sizeof (__value) == 8, \
"size of per-thread data"); \
if (sizeof (__value) == 1) \
asm volatile ("movb %%fs:%P2,%b0" \
: "=q" (__value) \
: "0" (0), "i" (offsetof (struct pthread, member))); \
else if (sizeof (__value) == 4) \
asm volatile ("movl %%fs:%P1,%0" \
: "=r" (__value) \
: "i" (offsetof (struct pthread, member))); \
else /* 8 */ \
{ \
asm volatile ("movq %%fs:%P1,%q0" \
: "=r" (__value) \
: "i" (offsetof (struct pthread, member))); \
} \
__value; })
/* Same as THREAD_GETMEM, but the member offset can be non-constant. */
# define THREAD_GETMEM_NC(descr, member, idx) \
({ __typeof (descr->member[0]) __value; \
_Static_assert (sizeof (__value) == 1 \
|| sizeof (__value) == 4 \
|| sizeof (__value) == 8, \
"size of per-thread data"); \
if (sizeof (__value) == 1) \
asm volatile ("movb %%fs:%P2(%q3),%b0" \
: "=q" (__value) \
: "0" (0), "i" (offsetof (struct pthread, member[0])), \
"r" (idx)); \
else if (sizeof (__value) == 4) \
asm volatile ("movl %%fs:%P1(,%q2,4),%0" \
: "=r" (__value) \
: "i" (offsetof (struct pthread, member[0])), "r" (idx));\
else /* 8 */ \
{ \
asm volatile ("movq %%fs:%P1(,%q2,8),%q0" \
: "=r" (__value) \
: "i" (offsetof (struct pthread, member[0])), \
"r" (idx)); \
} \
__value; })
/* Loading addresses of objects on x86-64 needs to be treated special
when generating PIC code. */
#ifdef __pic__
# define IMM_MODE "nr"
#else
# define IMM_MODE "ir"
#endif
/* Set member of the thread descriptor directly. */
# define THREAD_SETMEM(descr, member, value) \
({ \
_Static_assert (sizeof (descr->member) == 1 \
|| sizeof (descr->member) == 4 \
|| sizeof (descr->member) == 8, \
"size of per-thread data"); \
if (sizeof (descr->member) == 1) \
asm volatile ("movb %b0,%%fs:%P1" : \
: "iq" (value), \
"i" (offsetof (struct pthread, member))); \
else if (sizeof (descr->member) == 4) \
asm volatile ("movl %0,%%fs:%P1" : \
: IMM_MODE (value), \
"i" (offsetof (struct pthread, member))); \
else /* 8 */ \
{ \
/* Since movq takes a signed 32-bit immediate or a register source \
operand, use "er" constraint for 32-bit signed integer constant \
or register. */ \
asm volatile ("movq %q0,%%fs:%P1" : \
: "er" ((uint64_t) cast_to_integer (value)), \
"i" (offsetof (struct pthread, member))); \
}})
/* Same as THREAD_SETMEM, but the member offset can be non-constant. */
# define THREAD_SETMEM_NC(descr, member, idx, value) \
({ \
_Static_assert (sizeof (descr->member[0]) == 1 \
|| sizeof (descr->member[0]) == 4 \
|| sizeof (descr->member[0]) == 8, \
"size of per-thread data"); \
if (sizeof (descr->member[0]) == 1) \
asm volatile ("movb %b0,%%fs:%P1(%q2)" : \
: "iq" (value), \
"i" (offsetof (struct pthread, member[0])), \
"r" (idx)); \
else if (sizeof (descr->member[0]) == 4) \
asm volatile ("movl %0,%%fs:%P1(,%q2,4)" : \
: IMM_MODE (value), \
"i" (offsetof (struct pthread, member[0])), \
"r" (idx)); \
else /* 8 */ \
{ \
/* Since movq takes a signed 32-bit immediate or a register source \
operand, use "er" constraint for 32-bit signed integer constant \
or register. */ \
asm volatile ("movq %q0,%%fs:%P1(,%q2,8)" : \
: "er" ((uint64_t) cast_to_integer (value)), \
"i" (offsetof (struct pthread, member[0])), \
"r" (idx)); \
}})

114
sysdeps/x86_64/nptl/tls.h
View file

@ -195,119 +195,7 @@ _Static_assert (offsetof (tcbhead_t, __glibc_unused2) == 0x80,
# define DB_THREAD_SELF_INCLUDE <sys/reg.h> /* For the FS constant. */
# define DB_THREAD_SELF CONST_THREAD_AREA (64, FS)
/* Read member of the thread descriptor directly. */
# define THREAD_GETMEM(descr, member) \
({ __typeof (descr->member) __value; \
_Static_assert (sizeof (__value) == 1 \
|| sizeof (__value) == 4 \
|| sizeof (__value) == 8, \
"size of per-thread data"); \
if (sizeof (__value) == 1) \
asm volatile ("movb %%fs:%P2,%b0" \
: "=q" (__value) \
: "0" (0), "i" (offsetof (struct pthread, member))); \
else if (sizeof (__value) == 4) \
asm volatile ("movl %%fs:%P1,%0" \
: "=r" (__value) \
: "i" (offsetof (struct pthread, member))); \
else /* 8 */ \
{ \
asm volatile ("movq %%fs:%P1,%q0" \
: "=r" (__value) \
: "i" (offsetof (struct pthread, member))); \
} \
__value; })
/* Same as THREAD_GETMEM, but the member offset can be non-constant. */
# define THREAD_GETMEM_NC(descr, member, idx) \
({ __typeof (descr->member[0]) __value; \
_Static_assert (sizeof (__value) == 1 \
|| sizeof (__value) == 4 \
|| sizeof (__value) == 8, \
"size of per-thread data"); \
if (sizeof (__value) == 1) \
asm volatile ("movb %%fs:%P2(%q3),%b0" \
: "=q" (__value) \
: "0" (0), "i" (offsetof (struct pthread, member[0])), \
"r" (idx)); \
else if (sizeof (__value) == 4) \
asm volatile ("movl %%fs:%P1(,%q2,4),%0" \
: "=r" (__value) \
: "i" (offsetof (struct pthread, member[0])), "r" (idx));\
else /* 8 */ \
{ \
asm volatile ("movq %%fs:%P1(,%q2,8),%q0" \
: "=r" (__value) \
: "i" (offsetof (struct pthread, member[0])), \
"r" (idx)); \
} \
__value; })
/* Loading addresses of objects on x86-64 needs to be treated special
when generating PIC code. */
#ifdef __pic__
# define IMM_MODE "nr"
#else
# define IMM_MODE "ir"
#endif
/* Set member of the thread descriptor directly. */
# define THREAD_SETMEM(descr, member, value) \
({ \
_Static_assert (sizeof (descr->member) == 1 \
|| sizeof (descr->member) == 4 \
|| sizeof (descr->member) == 8, \
"size of per-thread data"); \
if (sizeof (descr->member) == 1) \
asm volatile ("movb %b0,%%fs:%P1" : \
: "iq" (value), \
"i" (offsetof (struct pthread, member))); \
else if (sizeof (descr->member) == 4) \
asm volatile ("movl %0,%%fs:%P1" : \
: IMM_MODE (value), \
"i" (offsetof (struct pthread, member))); \
else /* 8 */ \
{ \
/* Since movq takes a signed 32-bit immediate or a register source \
operand, use "er" constraint for 32-bit signed integer constant \
or register. */ \
asm volatile ("movq %q0,%%fs:%P1" : \
: "er" ((uint64_t) cast_to_integer (value)), \
"i" (offsetof (struct pthread, member))); \
}})
/* Same as THREAD_SETMEM, but the member offset can be non-constant. */
# define THREAD_SETMEM_NC(descr, member, idx, value) \
({ \
_Static_assert (sizeof (descr->member[0]) == 1 \
|| sizeof (descr->member[0]) == 4 \
|| sizeof (descr->member[0]) == 8, \
"size of per-thread data"); \
if (sizeof (descr->member[0]) == 1) \
asm volatile ("movb %b0,%%fs:%P1(%q2)" : \
: "iq" (value), \
"i" (offsetof (struct pthread, member[0])), \
"r" (idx)); \
else if (sizeof (descr->member[0]) == 4) \
asm volatile ("movl %0,%%fs:%P1(,%q2,4)" : \
: IMM_MODE (value), \
"i" (offsetof (struct pthread, member[0])), \
"r" (idx)); \
else /* 8 */ \
{ \
/* Since movq takes a signed 32-bit immediate or a register source \
operand, use "er" constraint for 32-bit signed integer constant \
or register. */ \
asm volatile ("movq %q0,%%fs:%P1(,%q2,8)" : \
: "er" ((uint64_t) cast_to_integer (value)), \
"i" (offsetof (struct pthread, member[0])), \
"r" (idx)); \
}})
# include <tcb-access.h>
/* Set the stack guard field in TCB head. */
# define THREAD_SET_STACK_GUARD(value) \