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* setjmp/setjmp.h: Cleanup definition of setjmp macro.
This commit is contained in:
Ulrich Drepper 2001-01-17 01:01:02 +00:00
parent 376c348c91
commit eca90c85f5
3 changed files with 32 additions and 24 deletions
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2
ChangeLog
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@ -1,5 +1,7 @@
2001-01-16 Ulrich Drepper <drepper@redhat.com>
* setjmp/setjmp.h: Cleanup definition of setjmp macro.
* sysdeps/i386/elf/bsd-setjmp.S: Real implementation.
* sysdeps/i386/elf/bsd-_setjmp.S: Removed.
* sysdeps/i386/elf/setjmp.S (setjmp): Removed here.

35
setjmp/setjmp.h
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@ -1,4 +1,4 @@
/* Copyright (C) 1991,92,93,94,95,96,97,98,99 Free Software Foundation, Inc.
/* Copyright (C) 1991-1999, 2001 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
@ -34,36 +34,39 @@ __BEGIN_DECLS
typedef struct __jmp_buf_tag /* C++ doesn't like tagless structs. */
{
/* NOTE: The machine-dependent definitions of `__sigsetjmp'
assume that a `jmp_buf' begins with a `__jmp_buf'.
Do not move this member or add others before it. */
assume that a `jmp_buf' begins with a `__jmp_buf' and that
`__mask_was_saved' follows it. Do not move these members
or add others before it. */
__jmp_buf __jmpbuf; /* Calling environment. */
int __mask_was_saved; /* Saved the signal mask? */
__sigset_t __saved_mask; /* Saved signal mask. */
} jmp_buf[1];
/* Store the calling environment in ENV, also saving the signal mask.
Return 0. */
extern int setjmp (jmp_buf __env) __THROW;
/* Store the calling environment in ENV, not saving the signal mask.
Return 0. */
extern int _setjmp (jmp_buf __env) __THROW;
/* Store the calling environment in ENV, also saving the
signal mask if SAVEMASK is nonzero. Return 0.
This is the internal name for `sigsetjmp'. */
extern int __sigsetjmp (jmp_buf __env, int __savemask) __THROW;
#ifndef __FAVOR_BSD
/* Set ENV to the current position and return 0, not saving the signal mask.
This is just like `sigsetjmp (ENV, 0)'.
The ISO C standard says `setjmp' is a macro. */
# define setjmp(env) __sigsetjmp ((env), 0)
/* Do not save the signal mask. This is equivalent to the `_setjmp'
BSD function. */
# define setjmp(env) _setjmp (env)
#else
/* We are in 4.3 BSD-compatibility mode in which `setjmp'
saves the signal mask like `sigsetjmp (ENV, 1)'. */
# define setjmp(env) __sigsetjmp ((env), 1)
saves the signal mask like `sigsetjmp (ENV, 1)'. We have to
define a macro since ISO C says `setjmp' is one. */
# define setjmp(env) setjmp (env)
#endif /* Favor BSD. */
#if defined __USE_BSD || defined __USE_XOPEN
/* Set ENV to the current position and return 0, not saving the signal mask.
This is the 4.3 BSD name for ISO `setjmp'. */
# define _setjmp(env) __sigsetjmp ((env), 0)
#endif
/* Jump to the environment saved in ENV, making the
`setjmp' call there return VAL, or 1 if VAL is 0. */
@ -86,7 +89,7 @@ typedef jmp_buf sigjmp_buf;
/* Store the calling environment in ENV, also saving the
signal mask if SAVEMASK is nonzero. Return 0. */
# define sigsetjmp(env, savemask) __sigsetjmp ((env), (savemask))
# define sigsetjmp(env, savemask) __sigsetjmp (env, savemask)
/* Jump to the environment saved in ENV, making the
sigsetjmp call there return VAL, or 1 if VAL is 0.

19
sysdeps/i386/bsd-_setjmp.S
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@ -35,18 +35,21 @@
ENTRY (BP_SYM (_setjmp))
ENTER
movl JMPBUF(%esp), %eax
CHECK_BOUNDS_BOTH_WIDE (%eax, JMPBUF(%esp), $JB_SIZE)
xorl %eax, %eax
movl JMPBUF(%esp), %edx
CHECK_BOUNDS_BOTH_WIDE (%edx, JMPBUF(%esp), $(JB_SIZE+4))
/* Save registers. */
movl %ebx, (JB_BX*4)(%eax)
movl %esi, (JB_SI*4)(%eax)
movl %edi, (JB_DI*4)(%eax)
movl %ebx, (JB_BX*4)(%edx)
movl %esi, (JB_SI*4)(%edx)
movl %edi, (JB_DI*4)(%edx)
leal JMPBUF(%esp), %ecx /* Save SP as it will be after we return. */
movl %ecx, (JB_SP*4)(%eax)
movl %ecx, (JB_SP*4)(%edx)
movl PCOFF(%esp), %ecx /* Save PC we are returning to now. */
movl %ecx, (JB_PC*4)(%eax)
movl %ecx, (JB_PC*4)(%edx)
LEAVE
movl %ebp, (JB_BP*4)(%eax) /* Save caller's frame pointer. */
movl %ebp, (JB_BP*4)(%edx) /* Save caller's frame pointer. */
movl %eax, JB_SIZE(%edx) /* No signal mask set. */
ret
END (BP_SYM (_setjmp))