ea27835442
1998-03-05 Ulrich Drepper <drepper@cygnus.com> * elf/rtld.c: Speed up processing of environment variables. Do only one run on the environment by avoiding to call getenv. * sysdeps/generic/dl-sysdep.c (_dl_next_ld_env_entry): New function. Used by patch above. 1998-03-05 10:25 Ulrich Drepper <drepper@cygnus.com> * nss/getXXbyYY_r.c: Don't try to contact nscd every time when it failed. Only do this every NSS_NSCD_RETRY times. * nss/nsswitch.c: Define __nss_nscd_not_available, used by above change. * nscd/nscd_getgr_r.c (__nscd_getgr_r): Return 2 if contacting the daemon failed. * nscd/nscd_getpw_r.c (__nscd_getpw_r): Likewise. 1998-03-05 Ulrich Drepper <drepper@cygnus.com> * nss/nsswitch.c (nss_lookup_function): Don't modify errno if NSS module cannot be found. Reported by Andreas Jaeger. 1998-03-05 11:40 Franz Sirl <Franz.Sirl-kernel@lauterbach.com> * nscd/nscd_getgr_r.c: Change char to int to avoid compiler warning on platforms which default to unsigned chars. * nscd/nscd_getpw_r.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/sysdep.h: Undefine L before defining it. 1998-03-05 Andreas Jaeger <aj@arthur.rhein-neckar.de> * elf/Makefile (install-bin): Change = to += for sprof to install ldd also.
145 lines
4.5 KiB
C
145 lines
4.5 KiB
C
/* Copyright (C) 1992, 1997, 1998 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include <sysdeps/unix/sysdep.h>
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/* For Linux we can use the system call table in the header file
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/usr/include/asm/unistd.h
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of the kernel. But these symbols do not follow the SYS_* syntax
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so we have to redefine the `SYS_ify' macro here. */
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#undef SYS_ify
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#ifdef __STDC__
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# define SYS_ify(syscall_name) __NR_##syscall_name
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#else
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# define SYS_ify(syscall_name) __NR_/**/syscall_name
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#endif
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#ifdef ASSEMBLER
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/* This seems to always be the case on PPC. */
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#define ALIGNARG(log2) log2
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/* For ELF we need the `.type' directive to make shared libs work right. */
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#define ASM_TYPE_DIRECTIVE(name,typearg) .type name,typearg;
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#define ASM_SIZE_DIRECTIVE(name) .size name,.-name
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/* If compiled for profiling, call `_mcount' at the start of each function. */
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#ifdef PROF
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/* The mcount code relies on a the return address being on the stack
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to locate our caller and so it can restore it; so store one just
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for its benefit. */
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#ifdef PIC
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#define CALL_MCOUNT \
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.pushsection; \
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.section ".data"; \
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.align ALIGNARG(2); \
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0:.long 0; \
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.previous; \
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mflr %r0; \
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stw %r0,4(%r1); \
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bl _GLOBAL_OFFSET_TABLE_@local-4; \
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mflr %r11; \
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lwz %r0,0b@got(%r11); \
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bl JUMPTARGET(_mcount);
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#else /* PIC */
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#define CALL_MCOUNT \
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.section ".data"; \
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.align ALIGNARG(2); \
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0:.long 0; \
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.previous; \
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mflr %r0; \
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lis %r11,0b@ha; \
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stw %r0,4(%r1); \
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addi %r0,%r11,0b@l; \
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bl JUMPTARGET(_mcount);
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#endif /* PIC */
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#else /* PROF */
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#define CALL_MCOUNT /* Do nothing. */
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#endif /* PROF */
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#define ENTRY(name) \
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ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(name); \
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ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function) \
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.align ALIGNARG(2); \
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C_LABEL(name) \
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CALL_MCOUNT
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#define EALIGN_W_0 /* No words to insert. */
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#define EALIGN_W_1 nop
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#define EALIGN_W_2 nop;nop
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#define EALIGN_W_3 nop;nop;nop
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#define EALIGN_W_4 EALIGN_W_3;nop
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#define EALIGN_W_5 EALIGN_W_4;nop
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#define EALIGN_W_6 EALIGN_W_5;nop
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#define EALIGN_W_7 EALIGN_W_6;nop
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/* EALIGN is like ENTRY, but does alignment to 'words'*4 bytes
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past a 2^align boundary. */
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#ifdef PROF
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#define EALIGN(name, alignt, words) \
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ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(name); \
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ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function) \
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.align ALIGNARG(2); \
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C_LABEL(name) \
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CALL_MCOUNT \
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b 0f; \
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.align ALIGNARG(alignt); \
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EALIGN_W_##words; \
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0:
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#else /* PROF */
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#define EALIGN(name, alignt, words) \
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ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(name); \
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ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function) \
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.align ALIGNARG(alignt); \
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EALIGN_W_##words; \
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C_LABEL(name)
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#endif
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#undef END
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#define END(name) \
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ASM_SIZE_DIRECTIVE(name)
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#define DO_CALL(syscall) \
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li 0,syscall; \
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sc
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#ifdef PIC
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#define JUMPTARGET(name) name##@plt
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#else
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#define JUMPTARGET(name) name
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#endif
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#define PSEUDO(name, syscall_name, args) \
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.section ".text"; \
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ENTRY (name) \
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DO_CALL (SYS_ify (syscall_name));
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#define PSEUDO_RET \
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bnslr; \
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b JUMPTARGET(__syscall_error)
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#define ret PSEUDO_RET
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#undef PSEUDO_END
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#define PSEUDO_END(name) \
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END (name)
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/* Local labels stripped out by the linker. */
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#undef L
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#define L(x) .L##x
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#endif /* ASSEMBLER */
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