diff options
Diffstat (limited to 'contrib/syslinux-4.02/gpxe/src/arch/i386/core/setjmp.S')
| -rw-r--r-- | contrib/syslinux-4.02/gpxe/src/arch/i386/core/setjmp.S | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/contrib/syslinux-4.02/gpxe/src/arch/i386/core/setjmp.S b/contrib/syslinux-4.02/gpxe/src/arch/i386/core/setjmp.S new file mode 100644 index 0000000..0372714 --- /dev/null +++ b/contrib/syslinux-4.02/gpxe/src/arch/i386/core/setjmp.S @@ -0,0 +1,42 @@ +/* setjmp and longjmp. Use of these functions is deprecated. */ + +FILE_LICENCE ( GPL2_OR_LATER ) + + .text + .arch i386 + .code32 + +/************************************************************************** +SETJMP - Save stack context for non-local goto +**************************************************************************/ + .globl setjmp +setjmp: + movl 4(%esp),%ecx /* jmpbuf */ + movl 0(%esp),%edx /* return address */ + movl %edx,0(%ecx) + movl %ebx,4(%ecx) + movl %esp,8(%ecx) + movl %ebp,12(%ecx) + movl %esi,16(%ecx) + movl %edi,20(%ecx) + movl $0,%eax + ret + +/************************************************************************** +LONGJMP - Non-local jump to a saved stack context +**************************************************************************/ + .globl longjmp +longjmp: + movl 4(%esp),%edx /* jumpbuf */ + movl 8(%esp),%eax /* result */ + movl 0(%edx),%ecx + movl 4(%edx),%ebx + movl 8(%edx),%esp + movl 12(%edx),%ebp + movl 16(%edx),%esi + movl 20(%edx),%edi + cmpl $0,%eax + jne 1f + movl $1,%eax +1: movl %ecx,0(%esp) + ret |