mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-19 18:53:52 +08:00
276c974ac7
When compiling uml on x86_64: MODPOST vmlinux.o WARNING: vmlinux.o (.__syscall_stub.2): unexpected non-allocatable section. Did you forget to use "ax"/"aw" in a .S file? Note that for example <linux/init.h> contains section definitions for use in .S files. Because modpost checks for missing SHF_ALLOC section flag. So just add it. Signed-off-by: WANG Cong <amwang@redhat.com> Cc: Jeff Dike <jdike@addtoit.com> Cc: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
52 lines
764 B
ArmAsm
52 lines
764 B
ArmAsm
#include "as-layout.h"
|
|
|
|
.globl syscall_stub
|
|
.section .__syscall_stub, "ax"
|
|
|
|
.globl batch_syscall_stub
|
|
batch_syscall_stub:
|
|
/* load pointer to first operation */
|
|
mov $(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, STUB_DATA+4
|
|
cmpl $0, %eax
|
|
jz done
|
|
|
|
/* save current pointer */
|
|
mov %esp, 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, STUB_DATA
|
|
|
|
/* stop */
|
|
int3
|