gas/testsuite/gas/cfi/cfi-x86_64.s

   1         .text
   2
   3 #; func_locvars
   4 #; - function with a space on the stack
   5 #;   allocated for local variables
   6
   7 func_locvars:
   8         .cfi_startproc
   9
  10         #; alocate space for local vars
  11         sub     $0x1234,%rsp
  12         .cfi_adjust_cfa_offset  0x1234
  13
  14         #; dummy body
  15         movl    $1,%eax
  16
  17         #; release space of local vars and return
  18         add     $0x1234,%rsp
  19         .cfi_adjust_cfa_offset  -0x1234
  20         ret
  21         .cfi_endproc
  22
  23 #; func_prologue
  24 #; - functions that begins with standard
  25 #;   prologue: "pushq %rbp; movq %rsp,%rbp"
  26
  27 func_prologue:
  28         .cfi_startproc
  29
  30         #; prologue, CFI is valid after
  31         #; each instruction.
  32         pushq   %rbp
  33         .cfi_def_cfa_offset     16
  34         .cfi_offset             %rbp, -16
  35         movq    %rsp, %rbp
  36         .cfi_def_cfa_register   %rbp
  37
  38         #; function body
  39         call    func_locvars
  40         addl    $3, %eax
  41
  42         #; epilogue with valid CFI
  43         #; (we're better than gcc :-)
  44         leaveq
  45         .cfi_def_cfa            %rsp, 8
  46         ret
  47         .cfi_endproc
  48
  49 #; func_otherreg
  50 #; - function that moves frame pointer to
  51 #;   another register (r12) and then allocates
  52 #;   a space for local variables
  53
  54 func_otherreg:
  55         .cfi_startproc
  56
  57         #; save frame pointer to r8
  58         movq    %rsp,%r8
  59         .cfi_def_cfa_register   r8
  60
  61         #; alocate space for local vars
  62         #;  (no .cfi_{def,adjust}_cfa_offset here,
  63         #;   because CFA is computed from r8!)
  64         sub     $100,%rsp
  65
  66         #; function body
  67         call    func_prologue
  68         addl    $2, %eax
  69
  70         #; restore frame pointer from r8
  71         movq    %r8,%rsp
  72         .cfi_def_cfa_register   rsp
  73         ret
  74         .cfi_endproc
  75
  76 #; main
  77 #; - typical function
  78 main:
  79         .cfi_startproc
  80
  81         #; only function body that doesn't
  82         #; touch the stack at all.
  83         call    func_otherreg
  84
  85         #; return
  86         ret
  87         .cfi_endproc
  88
  89 #; _start
  90 #; - standard entry point
  91
  92         .globl  _start
  93 _start:
  94         .cfi_startproc
  95         call    main
  96         movq    %rax,%rdi
  97         movq    $0x3c,%rax
  98         syscall
  99         hlt
 100         .cfi_endproc
 101
 102 #; func_alldirectives
 103 #; - test for all .cfi directives.
 104 #;   This function is never called and the CFI info doesn't make sense.
 105
 106 func_alldirectives:
 107         .cfi_startproc simple
 108         .cfi_def_cfa    rsp,8
 109         nop
 110         .cfi_def_cfa_offset     16
 111         nop
 112         .cfi_def_cfa_register   r8
 113         nop
 114         .cfi_adjust_cfa_offset  0x1234
 115         nop
 116         .cfi_offset     %rsi, 0x10
 117         nop
 118         .cfi_register   %r8, %r9
 119         nop
 120         .cfi_remember_state
 121         nop
 122         .cfi_restore %rbp
 123         nop
 124         .cfi_undefined %rip
 125         nop
 126         .cfi_same_value rbx
 127         nop
 128         .cfi_restore_state
 129         ret
 130         .cfi_endproc
 131
 132 #; func_all_registers
 133 #; - test for all .cfi register numbers.
 134 #;   This function is never called and the CFI info doesn't make sense.
 135
 136 func_all_registers:
 137         .cfi_startproc simple
 138
 139         .cfi_undefined rip      ; nop
 140         .cfi_undefined rax      ; nop
 141         .cfi_undefined rcx      ; nop
 142         .cfi_undefined rdx      ; nop
 143         .cfi_undefined rbx      ; nop
 144         .cfi_undefined rsp      ; nop
 145         .cfi_undefined rbp      ; nop
 146         .cfi_undefined rsi      ; nop
 147         .cfi_undefined rdi      ; nop
 148         .cfi_undefined r8       ; nop
 149         .cfi_undefined r9       ; nop
 150         .cfi_undefined r10      ; nop
 151         .cfi_undefined r11      ; nop
 152         .cfi_undefined r12      ; nop
 153         .cfi_undefined r13      ; nop
 154         .cfi_undefined r14      ; nop
 155         .cfi_undefined r15      ; nop
 156         .cfi_undefined rflags   ; nop
 157
 158         .cfi_undefined es       ; nop
 159         .cfi_undefined cs       ; nop
 160         .cfi_undefined ds       ; nop
 161         .cfi_undefined ss       ; nop
 162         .cfi_undefined fs       ; nop
 163         .cfi_undefined gs       ; nop
 164         .cfi_undefined tr       ; nop
 165         .cfi_undefined ldtr     ; nop
 166         .cfi_undefined fs.base  ; nop
 167         .cfi_undefined gs.base  ; nop
 168
 169         .cfi_undefined mxcsr    ; nop
 170         .cfi_undefined xmm0     ; nop
 171         .cfi_undefined xmm1     ; nop
 172         .cfi_undefined xmm2     ; nop
 173         .cfi_undefined xmm3     ; nop
 174         .cfi_undefined xmm4     ; nop
 175         .cfi_undefined xmm5     ; nop
 176         .cfi_undefined xmm6     ; nop
 177         .cfi_undefined xmm7     ; nop
 178         .cfi_undefined xmm8     ; nop
 179         .cfi_undefined xmm9     ; nop
 180         .cfi_undefined xmm10    ; nop
 181         .cfi_undefined xmm11    ; nop
 182         .cfi_undefined xmm12    ; nop
 183         .cfi_undefined xmm13    ; nop
 184         .cfi_undefined xmm14    ; nop
 185         .cfi_undefined xmm15    ; nop
 186
 187         .cfi_undefined fcw      ; nop
 188         .cfi_undefined fsw      ; nop
 189         .cfi_undefined st       ; nop
 190         .cfi_undefined st(1)    ; nop
 191         .cfi_undefined st(2)    ; nop
 192         .cfi_undefined st(3)    ; nop
 193         .cfi_undefined st(4)    ; nop
 194         .cfi_undefined st(5)    ; nop
 195         .cfi_undefined st(6)    ; nop
 196         .cfi_undefined st(7)    ; nop
 197
 198         .cfi_undefined mm0      ; nop
 199         .cfi_undefined mm1      ; nop
 200         .cfi_undefined mm2      ; nop
 201         .cfi_undefined mm3      ; nop
 202         .cfi_undefined mm4      ; nop
 203         .cfi_undefined mm5      ; nop
 204         .cfi_undefined mm6      ; nop
 205         .cfi_undefined mm7      ; nop
 206
 207         .cfi_endproc