diff options
| -rw-r--r-- | ChangeLog | 2 | ||||
| -rw-r--r-- | setjmp/setjmp.h | 35 | ||||
| -rw-r--r-- | sysdeps/i386/bsd-_setjmp.S | 19 |
3 files changed, 32 insertions, 24 deletions
@@ -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. diff --git a/setjmp/setjmp.h b/setjmp/setjmp.h index 44bd8d7..af48446 100644 --- a/setjmp/setjmp.h +++ b/setjmp/setjmp.h @@ -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. diff --git a/sysdeps/i386/bsd-_setjmp.S b/sysdeps/i386/bsd-_setjmp.S index aa9b8ed..5b215f0 100644 --- a/sysdeps/i386/bsd-_setjmp.S +++ b/sysdeps/i386/bsd-_setjmp.S @@ -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)) |