diff options
Diffstat (limited to 'arch/x86/include/asm/calling.h')
| -rw-r--r-- | arch/x86/include/asm/calling.h | 170 |
1 files changed, 170 insertions, 0 deletions
diff --git a/arch/x86/include/asm/calling.h b/arch/x86/include/asm/calling.h new file mode 100644 index 000000000000..2bc162e0ec6e --- /dev/null +++ b/arch/x86/include/asm/calling.h @@ -0,0 +1,170 @@ +/* + * 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, skiprax=0 + 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 + .if \skiprax + .else + movq \offset+72(%rsp), %rax + .endif + .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 |