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 10 .text 11 .globl __kernel_vsyscall 12 .type __kernel_vsyscall,@function 13__kernel_vsyscall: 14.LSTART_vsyscall: 15 int $0x80 16 ret 17.LEND_vsyscall: 18 .size __kernel_vsyscall,.-.LSTART_vsyscall 19 .previous 20 21 .section .eh_frame,"a",@progbits 22.LSTARTFRAMEDLSI: 23 .long .LENDCIEDLSI-.LSTARTCIEDLSI 24.LSTARTCIEDLSI: 25 .long 0 /* CIE ID */ 26 .byte 1 /* Version number */ 27 .string "zR" /* NUL-terminated augmentation string */ 28 .uleb128 1 /* Code alignment factor */ 29 .sleb128 -4 /* Data alignment factor */ 30 .byte 8 /* Return address register column */ 31 .uleb128 1 /* Augmentation value length */ 32 .byte 0x1b /* DW_EH_PE_pcrel|DW_EH_PE_sdata4. */ 33 .byte 0x0c /* DW_CFA_def_cfa */ 34 .uleb128 4 35 .uleb128 4 36 .byte 0x88 /* DW_CFA_offset, column 0x8 */ 37 .uleb128 1 38 .align 4 39.LENDCIEDLSI: 40 .long .LENDFDEDLSI-.LSTARTFDEDLSI /* Length FDE */ 41.LSTARTFDEDLSI: 42 .long .LSTARTFDEDLSI-.LSTARTFRAMEDLSI /* CIE pointer */ 43 .long .LSTART_vsyscall-. /* PC-relative start address */ 44 .long .LEND_vsyscall-.LSTART_vsyscall 45 .uleb128 0 46 .align 4 47.LENDFDEDLSI: 48 .previous 49 50/* 51 * Get the common code for the sigreturn entry points. 52 */ 53#include "vsyscall-sigreturn.S" 54