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author | Ingo Molnar <mingo@kernel.org> | 2015-06-03 16:05:44 (GMT) |
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committer | Ingo Molnar <mingo@kernel.org> | 2015-06-03 16:51:37 (GMT) |
commit | d603c8e184d882cc3f55c599f4185bad956ee0a7 (patch) | |
tree | 9af00f42ddd7fbdc1192e5708caaa3ef85103175 /arch/x86/entry/vdso/vdso32/int80.S | |
parent | 19a433f45135656d065bdf1bbe543796b194ba3a (diff) | |
download | linux-d603c8e184d882cc3f55c599f4185bad956ee0a7.tar.xz |
x86/asm/entry, x86/vdso: Move the vDSO code to arch/x86/entry/vdso/
Cc: Borislav Petkov <bp@alien8.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/entry/vdso/vdso32/int80.S')
-rw-r--r-- | arch/x86/entry/vdso/vdso32/int80.S | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/arch/x86/entry/vdso/vdso32/int80.S b/arch/x86/entry/vdso/vdso32/int80.S new file mode 100644 index 0000000..b15b7c0 --- /dev/null +++ b/arch/x86/entry/vdso/vdso32/int80.S @@ -0,0 +1,56 @@ +/* + * Code for the vDSO. This version uses the old int $0x80 method. + * + * First get the common code for the sigreturn entry points. + * This must come first. + */ +#include "sigreturn.S" + + .text + .globl __kernel_vsyscall + .type __kernel_vsyscall,@function + ALIGN +__kernel_vsyscall: +.LSTART_vsyscall: + int $0x80 + ret +.LEND_vsyscall: + .size __kernel_vsyscall,.-.LSTART_vsyscall + .previous + + .section .eh_frame,"a",@progbits +.LSTARTFRAMEDLSI: + .long .LENDCIEDLSI-.LSTARTCIEDLSI +.LSTARTCIEDLSI: + .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 +.LENDCIEDLSI: + .long .LENDFDEDLSI-.LSTARTFDEDLSI /* Length FDE */ +.LSTARTFDEDLSI: + .long .LSTARTFDEDLSI-.LSTARTFRAMEDLSI /* CIE pointer */ + .long .LSTART_vsyscall-. /* PC-relative start address */ + .long .LEND_vsyscall-.LSTART_vsyscall + .uleb128 0 + .align 4 +.LENDFDEDLSI: + .previous + + /* + * Pad out the segment to match the size of the sysenter.S version. + */ +VDSO32_vsyscall_eh_frame_size = 0x40 + .section .data,"aw",@progbits + .space VDSO32_vsyscall_eh_frame_size-(.LENDFDEDLSI-.LSTARTFRAMEDLSI), 0 + .previous |