diff options
Diffstat (limited to 'sysdeps/i386/elf/setjmp.S')
| -rw-r--r-- | sysdeps/i386/elf/setjmp.S | 55 |
1 files changed, 27 insertions, 28 deletions
diff --git a/sysdeps/i386/elf/setjmp.S b/sysdeps/i386/elf/setjmp.S index e734809bf8..1d600a489f 100644 --- a/sysdeps/i386/elf/setjmp.S +++ b/sysdeps/i386/elf/setjmp.S @@ -21,50 +21,49 @@ #define _ASM #define _SETJMP_H #include <bits/setjmp.h> +#include "bp-sym.h" #include "bp-asm.h" -#define PARMS LINKAGE /* no space for saved regs */ -#define JBUF PARMS -#define SGMSK JBUF+PRT_SIZE - /* We include the BSD entry points here as well but we make them weak. */ -ENTRY (setjmp) - .weak C_SYMBOL_NAME (setjmp) - popl %eax /* Pop return PC. */ - popl %ecx /* Pop jmp_buf argument. */ - pushl $1 /* Push second argument of zero. */ - pushl %ecx /* Push back first argument. */ - pushl %eax /* Push back return PC. */ +ENTRY (BP_SYM (setjmp)) + .weak C_SYMBOL_NAME (BP_SYM (setjmp)) + PUSH_SIGNAL_MASK (1) /* Note that we have to use a non-exported symbol in the next jump since otherwise gas will emit it as a jump through the PLT which is what we cannot use here. */ jmp .Linternal_sigsetjmp -END (setjmp) +END (BP_SYM (setjmp)) /* Binary compatibility entry point. */ -ENTRY (_setjmp) - .weak C_SYMBOL_NAME (_setjmp) -ENTRY (__setjmp) - popl %eax /* Pop return address. */ - popl %ecx /* Pop jmp_buf. */ - pushl $0 /* Push zero argument. */ - pushl %ecx /* Push jmp_buf. */ - pushl %eax /* Push back return address. */ +ENTRY (BP_SYM (_setjmp)) + .weak C_SYMBOL_NAME (BP_SYM (_setjmp)) +ENTRY (BP_SYM (__setjmp)) + PUSH_SIGNAL_MASK (0) + /* FALL THROUGH */ + +#define PARMS LINKAGE /* no space for saved regs */ +#define JMPBUF PARMS +#define SIGMSK JMPBUF+PTR_SIZE + +ENTRY (BP_SYM (__sigsetjmp)) +.Linternal_sigsetjmp = BP_SYM (__sigsetjmp) + ENTER + + movl JMPBUF(%esp), %eax + CHECK_BOUNDS_BOTH_WIDE (%eax, JMPBUF(%esp), $JB_SIZE) -ENTRY (__sigsetjmp) -.Linternal_sigsetjmp = __sigsetjmp - movl 4(%esp), %eax /* User's jmp_buf in %eax. */ /* Save registers. */ movl %ebx, (JB_BX*4)(%eax) movl %esi, (JB_SI*4)(%eax) movl %edi, (JB_DI*4)(%eax) movl %ebp, (JB_BP*4)(%eax) - leal JBUF(%esp), %ecx /* Save SP as it will be after we return. */ + leal JMPBUF(%esp), %ecx /* Save SP as it will be after we return. */ movl %ecx, (JB_SP*4)(%eax) - movl 0(%esp), %ecx /* Save PC we are returning to now. */ + movl PCOFF(%esp), %ecx /* Save PC we are returning to now. */ movl %ecx, (JB_PC*4)(%eax) + LEAVE /* pop frame pointer to prepare for tail-call. */ /* Make a tail call to __sigjmp_save; it takes the same args. */ #ifdef PIC /* We cannot use the PLT, because it requires that %ebx be set, but @@ -74,9 +73,9 @@ ENTRY (__sigsetjmp) call here here: popl %ecx addl $_GLOBAL_OFFSET_TABLE_+[.-here], %ecx - movl C_SYMBOL_NAME(__sigjmp_save@GOT)(%ecx), %ecx + movl C_SYMBOL_NAME (BP_SYM (__sigjmp_save)@GOT)(%ecx), %ecx jmp *%ecx #else - jmp __sigjmp_save + jmp BP_SYM (__sigjmp_save) #endif -END (__sigsetjmp) +END (BP_SYM (__sigsetjmp)) |