diff options
Diffstat (limited to 'linux-2.6.11-xen-sparse/arch/xen/x86_64/ia32/vsyscall-int80.S')
| -rw-r--r-- | linux-2.6.11-xen-sparse/arch/xen/x86_64/ia32/vsyscall-int80.S | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/linux-2.6.11-xen-sparse/arch/xen/x86_64/ia32/vsyscall-int80.S b/linux-2.6.11-xen-sparse/arch/xen/x86_64/ia32/vsyscall-int80.S new file mode 100644 index 0000000000..6ed66bd8ad --- /dev/null +++ b/linux-2.6.11-xen-sparse/arch/xen/x86_64/ia32/vsyscall-int80.S @@ -0,0 +1,57 @@ +/* + * Code for the vsyscall page. This version uses the old int $0x80 method. + * + * NOTE: + * 1) __kernel_vsyscall _must_ be first in this page. + * 2) there are alignment constraints on this stub, see vsyscall-sigreturn.S + * for details. + */ +#include <asm/ia32_unistd.h> +#include <asm/offset.h> + + .text + .section .text.vsyscall,"ax" + .globl __kernel_vsyscall + .type __kernel_vsyscall,@function +__kernel_vsyscall: +.LSTART_vsyscall: + int $0x80 + ret +.LEND_vsyscall: + .size __kernel_vsyscall,.-.LSTART_vsyscall + .previous + + .section .eh_frame,"a",@progbits +.LSTARTFRAME: + .long .LENDCIE-.LSTARTCIE +.LSTARTCIE: + .long 0 /* CIE ID */ + .byte 1 /* Version number */ + .string "zR" /* NUL-terminated augmentation string */ + .uleb128 1 /* Code alignment factor */ + .sleb128 -4 /* Data alignment factor */ + .byte 8 /* Return address register column */ + .uleb128 1 /* Augmentation value length */ + .byte 0x1b /* DW_EH_PE_pcrel|DW_EH_PE_sdata4. */ + .byte 0x0c /* DW_CFA_def_cfa */ + .uleb128 4 + .uleb128 4 + .byte 0x88 /* DW_CFA_offset, column 0x8 */ + .uleb128 1 + .align 4 +.LENDCIE: + + .long .LENDFDE1-.LSTARTFDE1 /* Length FDE */ +.LSTARTFDE1: + .long .LSTARTFDE1-.LSTARTFRAME /* CIE pointer */ + .long .LSTART_vsyscall-. /* PC-relative start address */ + .long .LEND_vsyscall-.LSTART_vsyscall + .uleb128 0 /* Augmentation length */ + .align 4 +.LENDFDE1: + +/* + * Get the common code for the sigreturn entry points. + */ +#define SYSCALL_ENTER_KERNEL int $0x80 +#include "vsyscall-sigreturn.S" |