Pull ec into test branch

[linux-2.6-omap-h63xx.git] / arch / um / sys-i386 / stub.S

diff --git a/arch/um/sys-i386/stub.S b/arch/um/sys-i386/stub.S
index 2f2c70a8f043440ef99f68c20332158292407972..6a70d9ab5c2905177429ba9b0f3ae2c1fc084fad 100644 (file)
--- a/arch/um/sys-i386/stub.S
+++ b/arch/um/sys-i386/stub.S
@@ -2,7 +2,50 @@
 
        .globl syscall_stub
 .section .__syscall_stub, "x"
-syscall_stub:
-       int     $0x80
+
+       .globl batch_syscall_stub
+batch_syscall_stub:
+       /* load pointer to first operation */
+       mov     $(UML_CONFIG_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, UML_CONFIG_STUB_DATA+4
+       cmpl    $0, %eax
+       jz      done
+
+       /* save current pointer */
+       mov     %esp, UML_CONFIG_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, UML_CONFIG_STUB_DATA
+
+       /* stop */
        int3