Ingo Molnar | 0c2bd5a | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 1 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | * Some macros to handle stack frames in assembly. |
Ingo Molnar | 0c2bd5a | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 3 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | |
Ingo Molnar | 0c2bd5a | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 5 | #define R15 0 |
| 6 | #define R14 8 |
| 7 | #define R13 16 |
| 8 | #define R12 24 |
| 9 | #define RBP 32 |
| 10 | #define RBX 40 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 11 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | /* arguments: interrupts/non tracing syscalls only save upto here*/ |
Ingo Molnar | 0c2bd5a | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 13 | #define R11 48 |
| 14 | #define R10 56 |
| 15 | #define R9 64 |
| 16 | #define R8 72 |
| 17 | #define RAX 80 |
| 18 | #define RCX 88 |
| 19 | #define RDX 96 |
| 20 | #define RSI 104 |
| 21 | #define RDI 112 |
| 22 | #define ORIG_RAX 120 /* + error_code */ |
| 23 | /* end of arguments */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | |
Ingo Molnar | 0c2bd5a | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 25 | /* cpu exception frame or undefined in case of fast syscall. */ |
| 26 | #define RIP 128 |
| 27 | #define CS 136 |
| 28 | #define EFLAGS 144 |
| 29 | #define RSP 152 |
| 30 | #define SS 160 |
| 31 | |
| 32 | #define ARGOFFSET R11 |
| 33 | #define SWFRAME ORIG_RAX |
| 34 | |
| 35 | .macro SAVE_ARGS addskip=0, norcx=0, nor891011=0 |
| 36 | subq $9*8+\addskip, %rsp |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | CFI_ADJUST_CFA_OFFSET 9*8+\addskip |
Ingo Molnar | 0c2bd5a | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 38 | movq %rdi, 8*8(%rsp) |
| 39 | CFI_REL_OFFSET rdi, 8*8 |
| 40 | movq %rsi, 7*8(%rsp) |
| 41 | CFI_REL_OFFSET rsi, 7*8 |
| 42 | movq %rdx, 6*8(%rsp) |
| 43 | CFI_REL_OFFSET rdx, 6*8 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | .if \norcx |
| 45 | .else |
Ingo Molnar | 0c2bd5a | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 46 | movq %rcx, 5*8(%rsp) |
| 47 | CFI_REL_OFFSET rcx, 5*8 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | .endif |
Ingo Molnar | 0c2bd5a | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 49 | movq %rax, 4*8(%rsp) |
| 50 | CFI_REL_OFFSET rax, 4*8 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | .if \nor891011 |
| 52 | .else |
Ingo Molnar | 0c2bd5a | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 53 | movq %r8, 3*8(%rsp) |
| 54 | CFI_REL_OFFSET r8, 3*8 |
| 55 | movq %r9, 2*8(%rsp) |
| 56 | CFI_REL_OFFSET r9, 2*8 |
| 57 | movq %r10, 1*8(%rsp) |
| 58 | CFI_REL_OFFSET r10, 1*8 |
| 59 | movq %r11, (%rsp) |
| 60 | CFI_REL_OFFSET r11, 0*8 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | .endif |
| 62 | .endm |
| 63 | |
Ingo Molnar | 0c2bd5a | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 64 | #define ARG_SKIP 9*8 |
| 65 | |
| 66 | .macro RESTORE_ARGS skiprax=0, addskip=0, skiprcx=0, skipr11=0, \ |
| 67 | skipr8910=0, skiprdx=0 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | .if \skipr11 |
| 69 | .else |
Ingo Molnar | 0c2bd5a | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 70 | movq (%rsp), %r11 |
Jan Beulich | 7effaa8 | 2005-09-12 18:49:24 +0200 | [diff] [blame] | 71 | CFI_RESTORE r11 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | .endif |
| 73 | .if \skipr8910 |
| 74 | .else |
Ingo Molnar | 0c2bd5a | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 75 | movq 1*8(%rsp), %r10 |
Jan Beulich | 7effaa8 | 2005-09-12 18:49:24 +0200 | [diff] [blame] | 76 | CFI_RESTORE r10 |
Ingo Molnar | 0c2bd5a | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 77 | movq 2*8(%rsp), %r9 |
Jan Beulich | 7effaa8 | 2005-09-12 18:49:24 +0200 | [diff] [blame] | 78 | CFI_RESTORE r9 |
Ingo Molnar | 0c2bd5a | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 79 | movq 3*8(%rsp), %r8 |
Jan Beulich | 7effaa8 | 2005-09-12 18:49:24 +0200 | [diff] [blame] | 80 | CFI_RESTORE r8 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | .endif |
| 82 | .if \skiprax |
| 83 | .else |
Ingo Molnar | 0c2bd5a | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 84 | movq 4*8(%rsp), %rax |
Jan Beulich | 7effaa8 | 2005-09-12 18:49:24 +0200 | [diff] [blame] | 85 | CFI_RESTORE rax |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | .endif |
| 87 | .if \skiprcx |
| 88 | .else |
Ingo Molnar | 0c2bd5a | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 89 | movq 5*8(%rsp), %rcx |
Jan Beulich | 7effaa8 | 2005-09-12 18:49:24 +0200 | [diff] [blame] | 90 | CFI_RESTORE rcx |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | .endif |
| 92 | .if \skiprdx |
| 93 | .else |
Ingo Molnar | 0c2bd5a | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 94 | movq 6*8(%rsp), %rdx |
Jan Beulich | 7effaa8 | 2005-09-12 18:49:24 +0200 | [diff] [blame] | 95 | CFI_RESTORE rdx |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | .endif |
Ingo Molnar | 0c2bd5a | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 97 | movq 7*8(%rsp), %rsi |
Jan Beulich | 7effaa8 | 2005-09-12 18:49:24 +0200 | [diff] [blame] | 98 | CFI_RESTORE rsi |
Ingo Molnar | 0c2bd5a | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 99 | movq 8*8(%rsp), %rdi |
Jan Beulich | 7effaa8 | 2005-09-12 18:49:24 +0200 | [diff] [blame] | 100 | CFI_RESTORE rdi |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | .if ARG_SKIP+\addskip > 0 |
Ingo Molnar | 0c2bd5a | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 102 | addq $ARG_SKIP+\addskip, %rsp |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | CFI_ADJUST_CFA_OFFSET -(ARG_SKIP+\addskip) |
| 104 | .endif |
Ingo Molnar | 0c2bd5a | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 105 | .endm |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | |
Roland McGrath | d4d6715 | 2008-07-09 02:38:07 -0700 | [diff] [blame^] | 107 | .macro LOAD_ARGS offset, skiprax=0 |
Ingo Molnar | 0c2bd5a | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 108 | movq \offset(%rsp), %r11 |
| 109 | movq \offset+8(%rsp), %r10 |
| 110 | movq \offset+16(%rsp), %r9 |
| 111 | movq \offset+24(%rsp), %r8 |
| 112 | movq \offset+40(%rsp), %rcx |
| 113 | movq \offset+48(%rsp), %rdx |
| 114 | movq \offset+56(%rsp), %rsi |
| 115 | movq \offset+64(%rsp), %rdi |
Roland McGrath | d4d6715 | 2008-07-09 02:38:07 -0700 | [diff] [blame^] | 116 | .if \skiprax |
| 117 | .else |
Ingo Molnar | 0c2bd5a | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 118 | movq \offset+72(%rsp), %rax |
Roland McGrath | d4d6715 | 2008-07-09 02:38:07 -0700 | [diff] [blame^] | 119 | .endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | .endm |
Ingo Molnar | 0c2bd5a | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 121 | |
| 122 | #define REST_SKIP 6*8 |
| 123 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | .macro SAVE_REST |
Ingo Molnar | 0c2bd5a | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 125 | subq $REST_SKIP, %rsp |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | CFI_ADJUST_CFA_OFFSET REST_SKIP |
Ingo Molnar | 0c2bd5a | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 127 | movq %rbx, 5*8(%rsp) |
| 128 | CFI_REL_OFFSET rbx, 5*8 |
| 129 | movq %rbp, 4*8(%rsp) |
| 130 | CFI_REL_OFFSET rbp, 4*8 |
| 131 | movq %r12, 3*8(%rsp) |
| 132 | CFI_REL_OFFSET r12, 3*8 |
| 133 | movq %r13, 2*8(%rsp) |
| 134 | CFI_REL_OFFSET r13, 2*8 |
| 135 | movq %r14, 1*8(%rsp) |
| 136 | CFI_REL_OFFSET r14, 1*8 |
| 137 | movq %r15, (%rsp) |
| 138 | CFI_REL_OFFSET r15, 0*8 |
| 139 | .endm |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 140 | |
| 141 | .macro RESTORE_REST |
Ingo Molnar | 0c2bd5a | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 142 | movq (%rsp), %r15 |
Jan Beulich | 7effaa8 | 2005-09-12 18:49:24 +0200 | [diff] [blame] | 143 | CFI_RESTORE r15 |
Ingo Molnar | 0c2bd5a | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 144 | movq 1*8(%rsp), %r14 |
Jan Beulich | 7effaa8 | 2005-09-12 18:49:24 +0200 | [diff] [blame] | 145 | CFI_RESTORE r14 |
Ingo Molnar | 0c2bd5a | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 146 | movq 2*8(%rsp), %r13 |
Jan Beulich | 7effaa8 | 2005-09-12 18:49:24 +0200 | [diff] [blame] | 147 | CFI_RESTORE r13 |
Ingo Molnar | 0c2bd5a | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 148 | movq 3*8(%rsp), %r12 |
Jan Beulich | 7effaa8 | 2005-09-12 18:49:24 +0200 | [diff] [blame] | 149 | CFI_RESTORE r12 |
Ingo Molnar | 0c2bd5a | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 150 | movq 4*8(%rsp), %rbp |
Jan Beulich | 7effaa8 | 2005-09-12 18:49:24 +0200 | [diff] [blame] | 151 | CFI_RESTORE rbp |
Ingo Molnar | 0c2bd5a | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 152 | movq 5*8(%rsp), %rbx |
Jan Beulich | 7effaa8 | 2005-09-12 18:49:24 +0200 | [diff] [blame] | 153 | CFI_RESTORE rbx |
Ingo Molnar | 0c2bd5a | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 154 | addq $REST_SKIP, %rsp |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | CFI_ADJUST_CFA_OFFSET -(REST_SKIP) |
| 156 | .endm |
Ingo Molnar | 0c2bd5a | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 157 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | .macro SAVE_ALL |
| 159 | SAVE_ARGS |
| 160 | SAVE_REST |
| 161 | .endm |
Ingo Molnar | 0c2bd5a | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 162 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | .macro RESTORE_ALL addskip=0 |
| 164 | RESTORE_REST |
Ingo Molnar | 0c2bd5a | 2008-01-30 13:32:49 +0100 | [diff] [blame] | 165 | RESTORE_ARGS 0, \addskip |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | .endm |
| 167 | |
| 168 | .macro icebp |
| 169 | .byte 0xf1 |
| 170 | .endm |