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/*
* 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