direct-io.hg

view linux-2.6-xen-sparse/arch/x86_64/ia32/vsyscall-int80.S @ 11690:38f9bd7a4ce6

[NET] Make MAX_SKBUFF_ORDER page-size independent.
Original patch from Isaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: Keir Fraser <keir@xensource.com>
author kfraser@localhost.localdomain
date Tue Oct 03 11:39:22 2006 +0100 (2006-10-03)
parents 2494b4e00cbb
children
line source
1 /*
2 * Code for the vsyscall page. This version uses the old int $0x80 method.
3 *
4 * NOTE:
5 * 1) __kernel_vsyscall _must_ be first in this page.
6 * 2) there are alignment constraints on this stub, see vsyscall-sigreturn.S
7 * for details.
8 */
9 #include <asm/ia32_unistd.h>
10 #include <asm/asm-offsets.h>
12 .code32
13 .text
14 .section .text.vsyscall,"ax"
15 .globl __kernel_vsyscall
16 .type __kernel_vsyscall,@function
17 __kernel_vsyscall:
18 .LSTART_vsyscall:
19 int $0x80
20 ret
21 .LEND_vsyscall:
22 .size __kernel_vsyscall,.-.LSTART_vsyscall
23 .previous
25 .section .eh_frame,"a",@progbits
26 .LSTARTFRAME:
27 .long .LENDCIE-.LSTARTCIE
28 .LSTARTCIE:
29 .long 0 /* CIE ID */
30 .byte 1 /* Version number */
31 .string "zR" /* NUL-terminated augmentation string */
32 .uleb128 1 /* Code alignment factor */
33 .sleb128 -4 /* Data alignment factor */
34 .byte 8 /* Return address register column */
35 .uleb128 1 /* Augmentation value length */
36 .byte 0x1b /* DW_EH_PE_pcrel|DW_EH_PE_sdata4. */
37 .byte 0x0c /* DW_CFA_def_cfa */
38 .uleb128 4
39 .uleb128 4
40 .byte 0x88 /* DW_CFA_offset, column 0x8 */
41 .uleb128 1
42 .align 4
43 .LENDCIE:
45 .long .LENDFDE1-.LSTARTFDE1 /* Length FDE */
46 .LSTARTFDE1:
47 .long .LSTARTFDE1-.LSTARTFRAME /* CIE pointer */
48 .long .LSTART_vsyscall-. /* PC-relative start address */
49 .long .LEND_vsyscall-.LSTART_vsyscall
50 .uleb128 0 /* Augmentation length */
51 .align 4
52 .LENDFDE1:
54 /*
55 * Get the common code for the sigreturn entry points.
56 */
57 #define SYSCALL_ENTER_KERNEL int $0x80
58 #include "vsyscall-sigreturn.S"