projects / deliverable / binutils-gdb.git / blame
| Commit | Line | Data |
|---|---|---|
| 2ebaa23b AM |
1 | .text |
| 2 | ||
| 3 | #; func_locvars | |
| 4 | #; - function with a space on the stack | |
| 5 | #; allocated for local variables | |
| 6 | ||
| 2ebaa23b AM |
7 | func_locvars: |
| 8 | .cfi_startproc | |
| 9 | ||
| 10 | #; alocate space for local vars | |
| 11 | sub $0x1234,%esp | |
| 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,%esp | |
| 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 | ||
| 2ebaa23b AM |
27 | func_prologue: |
| 28 | .cfi_startproc | |
| 29 | ||
| 30 | #; prologue, CFI is valid after | |
| 31 | #; each instruction. | |
| 32 | pushl %ebp | |
| 33 | .cfi_def_cfa_offset 8 | |
| 34 | .cfi_offset ebp,-8 | |
| 35 | movl %esp, %ebp | |
| 36 | .cfi_def_cfa_register ebp | |
| 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 | leave | |
| 45 | .cfi_def_cfa_register esp | |
| 46 | ret | |
| 47 | .cfi_endproc | |
| 48 | ||
| 49 | #; func_otherreg | |
| 50 | #; - function that moves frame pointer to | |
| a60de03c | 51 | #; another register (ebx) and then allocates |
| 2ebaa23b AM |
52 | #; a space for local variables |
| 53 | ||
| 2ebaa23b AM |
54 | func_otherreg: |
| 55 | .cfi_startproc | |
| 56 | ||
| 57 | #; save frame pointer to ebx | |
| 58 | mov %esp,%ebx | |
| 59 | .cfi_def_cfa_register ebx | |
| 60 | ||
| 61 | #; alocate space for local vars | |
| 62 | #; (no .cfi_{def,adjust}_cfa_offset here, | |
| a60de03c | 63 | #; because CFA is computed from ebx!) |
| 2ebaa23b AM |
64 | sub $100,%esp |
| 65 | ||
| 66 | #; function body | |
| 67 | call func_prologue | |
| 68 | add $2, %eax | |
| 69 | ||
| a60de03c | 70 | #; restore frame pointer from ebx |
| 2ebaa23b AM |
71 | mov %ebx,%esp |
| 72 | .cfi_def_cfa esp,4 | |
| 73 | ret | |
| 74 | .cfi_endproc | |
| 75 | ||
| 76 | #; main | |
| 77 | #; - typical function | |
| 2ebaa23b AM |
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 | ||
| 2ebaa23b AM |
92 | .globl _start |
| 93 | _start: | |
| 94 | .cfi_startproc | |
| 95 | call main | |
| 96 | movl %eax,%edi | |
| 97 | movl $0x1,%eax | |
| 98 | int $0x80 | |
| 99 | hlt | |
| 100 | .cfi_endproc | |
| a60de03c JB |
101 | |
| 102 | #; func_all_registers | |
| 103 | #; - test for all .cfi register numbers. | |
| 104 | #; This function is never called and the CFI info doesn't make sense. | |
| 105 | ||
| a60de03c JB |
106 | func_all_registers: |
| 107 | .cfi_startproc simple | |
| 108 | ||
| 109 | .cfi_undefined eip ; nop | |
| 110 | .cfi_undefined eax ; nop | |
| 111 | .cfi_undefined ecx ; nop | |
| 112 | .cfi_undefined edx ; nop | |
| 113 | .cfi_undefined ebx ; nop | |
| 114 | .cfi_undefined esp ; nop | |
| 115 | .cfi_undefined ebp ; nop | |
| 116 | .cfi_undefined esi ; nop | |
| 117 | .cfi_undefined edi ; nop | |
| 118 | .cfi_undefined eflags ; nop | |
| 119 | ||
| 120 | .cfi_undefined es ; nop | |
| 121 | .cfi_undefined cs ; nop | |
| 122 | .cfi_undefined ds ; nop | |
| 123 | .cfi_undefined ss ; nop | |
| 124 | .cfi_undefined fs ; nop | |
| 125 | .cfi_undefined gs ; nop | |
| 126 | .cfi_undefined tr ; nop | |
| 127 | .cfi_undefined ldtr ; nop | |
| 128 | ||
| 129 | .cfi_undefined mxcsr ; nop | |
| 130 | .cfi_undefined xmm0 ; nop | |
| 131 | .cfi_undefined xmm1 ; nop | |
| 132 | .cfi_undefined xmm2 ; nop | |
| 133 | .cfi_undefined xmm3 ; nop | |
| 134 | .cfi_undefined xmm4 ; nop | |
| 135 | .cfi_undefined xmm5 ; nop | |
| 136 | .cfi_undefined xmm6 ; nop | |
| 137 | .cfi_undefined xmm7 ; nop | |
| 138 | ||
| 139 | .cfi_undefined fcw ; nop | |
| 140 | .cfi_undefined fsw ; nop | |
| 141 | .cfi_undefined st ; nop | |
| 142 | .cfi_undefined st(1) ; nop | |
| 143 | .cfi_undefined st(2) ; nop | |
| 144 | .cfi_undefined st(3) ; nop | |
| 145 | .cfi_undefined st(4) ; nop | |
| 146 | .cfi_undefined st(5) ; nop | |
| 147 | .cfi_undefined st(6) ; nop | |
| 148 | .cfi_undefined st(7) ; nop | |
| 149 | ||
| 150 | .cfi_undefined mm0 ; nop | |
| 151 | .cfi_undefined mm1 ; nop | |
| 152 | .cfi_undefined mm2 ; nop | |
| 153 | .cfi_undefined mm3 ; nop | |
| 154 | .cfi_undefined mm4 ; nop | |
| 155 | .cfi_undefined mm5 ; nop | |
| 156 | .cfi_undefined mm6 ; nop | |
| 157 | .cfi_undefined mm7 ; nop | |
| 158 | ||
| 43234a1e L |
159 | .cfi_undefined k0 ; nop |
| 160 | .cfi_undefined k1 ; nop | |
| 161 | .cfi_undefined k2 ; nop | |
| 162 | .cfi_undefined k3 ; nop | |
| 163 | .cfi_undefined k4 ; nop | |
| 164 | .cfi_undefined k5 ; nop | |
| 165 | .cfi_undefined k6 ; nop | |
| 166 | .cfi_undefined k7 ; nop | |
| 167 | ||
| a60de03c | 168 | .cfi_endproc |