162 lines
3 KiB
C
162 lines
3 KiB
C
/*
|
|
* 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
|