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