include/asm-x86_64/calling.h

   1 /*
   2  * Some macros to handle stack frames in assembly.
   3  */
   4
   5 #include <linux/config.h>
   6
   7 #define R15 0
   8 #define R14 8
   9 #define R13 16
  10 #define R12 24
  11 #define RBP 32
  12 #define RBX 40
  13 /* arguments: interrupts/non tracing syscalls only save upto here*/
  14 #define R11 48
  15 #define R10 56
  16 #define R9 64
  17 #define R8 72
  18 #define RAX 80
  19 #define RCX 88
  20 #define RDX 96
  21 #define RSI 104
  22 #define RDI 112
  23 #define ORIG_RAX 120       /* + error_code */
  24 /* end of arguments */
  25 /* cpu exception frame or undefined in case of fast syscall. */
  26 #define RIP 128
  27 #define CS 136
  28 #define EFLAGS 144
  29 #define RSP 152
  30 #define SS 160
  31 #define ARGOFFSET R11
  32 #define SWFRAME ORIG_RAX
  33
  34         .macro SAVE_ARGS addskip=0,norcx=0,nor891011=0
  35         subq  $9*8+\addskip,%rsp
  36         CFI_ADJUST_CFA_OFFSET   9*8+\addskip
  37         movq  %rdi,8*8(%rsp)
  38         CFI_REL_OFFSET  rdi,8*8
  39         movq  %rsi,7*8(%rsp)
  40         CFI_REL_OFFSET  rsi,7*8
  41         movq  %rdx,6*8(%rsp)
  42         CFI_REL_OFFSET  rdx,6*8
  43         .if \norcx
  44         .else
  45         movq  %rcx,5*8(%rsp)
  46         CFI_REL_OFFSET  rcx,5*8
  47         .endif
  48         movq  %rax,4*8(%rsp)
  49         CFI_REL_OFFSET  rax,4*8
  50         .if \nor891011
  51         .else
  52         movq  %r8,3*8(%rsp)
  53         CFI_REL_OFFSET  r8,3*8
  54         movq  %r9,2*8(%rsp)
  55         CFI_REL_OFFSET  r9,2*8
  56         movq  %r10,1*8(%rsp)
  57         CFI_REL_OFFSET  r10,1*8
  58         movq  %r11,(%rsp)
  59         CFI_REL_OFFSET  r11,0*8
  60         .endif
  61         .endm
  62
  63 #define ARG_SKIP 9*8
  64         .macro RESTORE_ARGS skiprax=0,addskip=0,skiprcx=0,skipr11=0,skipr8910=0,skiprdx=0
  65         .if \skipr11
  66         .else
  67         movq (%rsp),%r11
  68         CFI_RESTORE r11
  69         .endif
  70         .if \skipr8910
  71         .else
  72         movq 1*8(%rsp),%r10
  73         CFI_RESTORE r10
  74         movq 2*8(%rsp),%r9
  75         CFI_RESTORE r9
  76         movq 3*8(%rsp),%r8
  77         CFI_RESTORE r8
  78         .endif
  79         .if \skiprax
  80         .else
  81         movq 4*8(%rsp),%rax
  82         CFI_RESTORE rax
  83         .endif
  84         .if \skiprcx
  85         .else
  86         movq 5*8(%rsp),%rcx
  87         CFI_RESTORE rcx
  88         .endif
  89         .if \skiprdx
  90         .else
  91         movq 6*8(%rsp),%rdx
  92         CFI_RESTORE rdx
  93         .endif
  94         movq 7*8(%rsp),%rsi
  95         CFI_RESTORE rsi
  96         movq 8*8(%rsp),%rdi
  97         CFI_RESTORE rdi
  98         .if ARG_SKIP+\addskip > 0
  99         addq $ARG_SKIP+\addskip,%rsp
 100         CFI_ADJUST_CFA_OFFSET   -(ARG_SKIP+\addskip)
 101         .endif
 102         .endm
 103
 104         .macro LOAD_ARGS offset
 105         movq \offset(%rsp),%r11
 106         movq \offset+8(%rsp),%r10
 107         movq \offset+16(%rsp),%r9
 108         movq \offset+24(%rsp),%r8
 109         movq \offset+40(%rsp),%rcx
 110         movq \offset+48(%rsp),%rdx
 111         movq \offset+56(%rsp),%rsi
 112         movq \offset+64(%rsp),%rdi
 113         movq \offset+72(%rsp),%rax
 114         .endm
 115
 116 #define REST_SKIP 6*8
 117         .macro SAVE_REST
 118         subq $REST_SKIP,%rsp
 119         CFI_ADJUST_CFA_OFFSET   REST_SKIP
 120         movq %rbx,5*8(%rsp)
 121         CFI_REL_OFFSET  rbx,5*8
 122         movq %rbp,4*8(%rsp)
 123         CFI_REL_OFFSET  rbp,4*8
 124         movq %r12,3*8(%rsp)
 125         CFI_REL_OFFSET  r12,3*8
 126         movq %r13,2*8(%rsp)
 127         CFI_REL_OFFSET  r13,2*8
 128         movq %r14,1*8(%rsp)
 129         CFI_REL_OFFSET  r14,1*8
 130         movq %r15,(%rsp)
 131         CFI_REL_OFFSET  r15,0*8
 132         .endm
 133
 134         .macro RESTORE_REST
 135         movq (%rsp),%r15
 136         CFI_RESTORE r15
 137         movq 1*8(%rsp),%r14
 138         CFI_RESTORE r14
 139         movq 2*8(%rsp),%r13
 140         CFI_RESTORE r13
 141         movq 3*8(%rsp),%r12
 142         CFI_RESTORE r12
 143         movq 4*8(%rsp),%rbp
 144         CFI_RESTORE rbp
 145         movq 5*8(%rsp),%rbx
 146         CFI_RESTORE rbx
 147         addq $REST_SKIP,%rsp
 148         CFI_ADJUST_CFA_OFFSET   -(REST_SKIP)
 149         .endm
 150
 151         .macro SAVE_ALL
 152         SAVE_ARGS
 153         SAVE_REST
 154         .endm
 155
 156         .macro RESTORE_ALL addskip=0
 157         RESTORE_REST
 158         RESTORE_ARGS 0,\addskip
 159         .endm
 160
 161         .macro icebp
 162         .byte 0xf1
 163         .endm