| /* | |
| * Some macros to handle stack frames in assembly. | |
| */ | |
| #define R15 0 | |
| #define R14 8 | |
| #define R13 16 | |
| #define R12 24 | |
| #define RBP 32 | |
| #define RBX 40 | |
| /* arguments: interrupts/non tracing syscalls only save upto here*/ | |
| #define R11 48 | |
| #define R10 56 | |
| #define R9 64 | |
| #define R8 72 | |
| #define RAX 80 | |
| #define RCX 88 | |
| #define RDX 96 | |
| #define RSI 104 | |
| #define RDI 112 | |
| #define ORIG_RAX 120 /* + error_code */ | |
| /* end of arguments */ | |
| /* cpu exception frame or undefined in case of fast syscall. */ | |
| #define RIP 128 | |
| #define CS 136 | |
| #define EFLAGS 144 | |
| #define RSP 152 | |
| #define SS 160 | |
| #define ARGOFFSET R11 | |
| #define SWFRAME ORIG_RAX | |
| .macro SAVE_ARGS addskip=0, norcx=0, nor891011=0 | |
| subq $9*8+\addskip, %rsp | |
| CFI_ADJUST_CFA_OFFSET 9*8+\addskip | |
| movq %rdi, 8*8(%rsp) | |
| CFI_REL_OFFSET rdi, 8*8 | |
| movq %rsi, 7*8(%rsp) | |
| CFI_REL_OFFSET rsi, 7*8 | |
| movq %rdx, 6*8(%rsp) | |
| CFI_REL_OFFSET rdx, 6*8 | |
| .if \norcx | |
| .else | |
| movq %rcx, 5*8(%rsp) | |
| CFI_REL_OFFSET rcx, 5*8 | |
| .endif | |
| movq %rax, 4*8(%rsp) | |
| CFI_REL_OFFSET rax, 4*8 | |
| .if \nor891011 | |
| .else | |
| movq %r8, 3*8(%rsp) | |
| CFI_REL_OFFSET r8, 3*8 | |
| movq %r9, 2*8(%rsp) | |
| CFI_REL_OFFSET r9, 2*8 | |
| movq %r10, 1*8(%rsp) | |
| CFI_REL_OFFSET r10, 1*8 | |
| movq %r11, (%rsp) | |
| CFI_REL_OFFSET r11, 0*8 | |
| .endif | |
| .endm | |
| #define ARG_SKIP 9*8 | |
| .macro RESTORE_ARGS skiprax=0, addskip=0, skiprcx=0, skipr11=0, \ | |
| skipr8910=0, skiprdx=0 | |
| .if \skipr11 | |
| .else | |
| movq (%rsp), %r11 | |
| CFI_RESTORE r11 | |
| .endif | |
| .if \skipr8910 | |
| .else | |
| movq 1*8(%rsp), %r10 | |
| CFI_RESTORE r10 | |
| movq 2*8(%rsp), %r9 | |
| CFI_RESTORE r9 | |
| movq 3*8(%rsp), %r8 | |
| CFI_RESTORE r8 | |
| .endif | |
| .if \skiprax | |
| .else | |
| movq 4*8(%rsp), %rax | |
| CFI_RESTORE rax | |
| .endif | |
| .if \skiprcx | |
| .else | |
| movq 5*8(%rsp), %rcx | |
| CFI_RESTORE rcx | |
| .endif | |
| .if \skiprdx | |
| .else | |
| movq 6*8(%rsp), %rdx | |
| CFI_RESTORE rdx | |
| .endif | |
| movq 7*8(%rsp), %rsi | |
| CFI_RESTORE rsi | |
| movq 8*8(%rsp), %rdi | |
| CFI_RESTORE rdi | |
| .if ARG_SKIP+\addskip > 0 | |
| addq $ARG_SKIP+\addskip, %rsp | |
| CFI_ADJUST_CFA_OFFSET -(ARG_SKIP+\addskip) | |
| .endif | |
| .endm | |
| .macro LOAD_ARGS offset | |
| movq \offset(%rsp), %r11 | |
| movq \offset+8(%rsp), %r10 | |
| movq \offset+16(%rsp), %r9 | |
| movq \offset+24(%rsp), %r8 | |
| movq \offset+40(%rsp), %rcx | |
| movq \offset+48(%rsp), %rdx | |
| movq \offset+56(%rsp), %rsi | |
| movq \offset+64(%rsp), %rdi | |
| movq \offset+72(%rsp), %rax | |
| .endm | |
| #define REST_SKIP 6*8 | |
| .macro SAVE_REST | |
| subq $REST_SKIP, %rsp | |
| CFI_ADJUST_CFA_OFFSET REST_SKIP | |
| movq %rbx, 5*8(%rsp) | |
| CFI_REL_OFFSET rbx, 5*8 | |
| movq %rbp, 4*8(%rsp) | |
| CFI_REL_OFFSET rbp, 4*8 | |
| movq %r12, 3*8(%rsp) | |
| CFI_REL_OFFSET r12, 3*8 | |
| movq %r13, 2*8(%rsp) | |
| CFI_REL_OFFSET r13, 2*8 | |
| movq %r14, 1*8(%rsp) | |
| CFI_REL_OFFSET r14, 1*8 | |
| movq %r15, (%rsp) | |
| CFI_REL_OFFSET r15, 0*8 | |
| .endm | |
| .macro RESTORE_REST | |
| movq (%rsp), %r15 | |
| CFI_RESTORE r15 | |
| movq 1*8(%rsp), %r14 | |
| CFI_RESTORE r14 | |
| movq 2*8(%rsp), %r13 | |
| CFI_RESTORE r13 | |
| movq 3*8(%rsp), %r12 | |
| CFI_RESTORE r12 | |
| movq 4*8(%rsp), %rbp | |
| CFI_RESTORE rbp | |
| movq 5*8(%rsp), %rbx | |
| CFI_RESTORE rbx | |
| addq $REST_SKIP, %rsp | |
| CFI_ADJUST_CFA_OFFSET -(REST_SKIP) | |
| .endm | |
| .macro SAVE_ALL | |
| SAVE_ARGS | |
| SAVE_REST | |
| .endm | |
| .macro RESTORE_ALL addskip=0 | |
| RESTORE_REST | |
| RESTORE_ARGS 0, \addskip | |
| .endm | |
| .macro icebp | |
| .byte 0xf1 | |
| .endm | |