File: [Development] / linux-2.6-xfs / arch / um / sys-i386 / stub.S (download)
Revision 1.3, Mon Dec 3 16:26:37 2007 UTC (9 years, 10 months ago) by lachlan.longdrop.melbourne.sgi.com
Branch: MAIN
Changes since 1.2: +5 -4
lines
Merge up to 2.6.24-rc3
Merge of 2.6.x-xfs-melb:linux:30183b by kenmcd.
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#include "uml-config.h"
#include "as-layout.h"
.globl syscall_stub
.section .__syscall_stub, "x"
.globl batch_syscall_stub
batch_syscall_stub:
/* load pointer to first operation */
mov $(ASM_STUB_DATA+8), %esp
again:
/* load length of additional data */
mov 0x0(%esp), %eax
/* if(length == 0) : end of list */
/* write possible 0 to header */
mov %eax, ASM_STUB_DATA+4
cmpl $0, %eax
jz done
/* save current pointer */
mov %esp, ASM_STUB_DATA+4
/* skip additional data */
add %eax, %esp
/* load syscall-# */
pop %eax
/* load syscall params */
pop %ebx
pop %ecx
pop %edx
pop %esi
pop %edi
pop %ebp
/* execute syscall */
int $0x80
/* check return value */
pop %ebx
cmp %ebx, %eax
je again
done:
/* save return value */
mov %eax, ASM_STUB_DATA
/* stop */
int3