| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| Roland McGrath | 69d0627 | 2008-01-30 13:30:44 +0100 | [diff] [blame] | 2 | * Code for the vDSO. This version uses the old int $0x80 method. |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
| Roland McGrath | 69d0627 | 2008-01-30 13:30:44 +0100 | [diff] [blame] | 4 | * First get the common code for the sigreturn entry points. |
| 5 | * This must come first. |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 6 | */ |
| Roland McGrath | 69d0627 | 2008-01-30 13:30:44 +0100 | [diff] [blame] | 7 | #include "sigreturn.S" |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | |
| 9 | .text |
| 10 | .globl __kernel_vsyscall |
| 11 | .type __kernel_vsyscall,@function |
| Roland McGrath | 69d0627 | 2008-01-30 13:30:44 +0100 | [diff] [blame] | 12 | ALIGN |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | |
| Roland McGrath | 69d0627 | 2008-01-30 13:30:44 +0100 | [diff] [blame] | 50 | /* |
| 51 | * Pad out the segment to match the size of the sysenter.S version. |
| 52 | */ |
| Roland McGrath | cadd516 | 2008-01-30 13:30:44 +0100 | [diff] [blame] | 53 | VDSO32_vsyscall_eh_frame_size = 0x40 |
| Roland McGrath | 69d0627 | 2008-01-30 13:30:44 +0100 | [diff] [blame] | 54 | .section .data,"aw",@progbits |
| 55 | .space VDSO32_vsyscall_eh_frame_size-(.LENDFDEDLSI-.LSTARTFRAMEDLSI), 0 |
| 56 | .previous |