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 | ||
| 7 | .type func_locvars,@function | |
| 8 | func_locvars: | |
| 9 | .cfi_startproc | |
| 10 | ||
| 11 | #; alocate space for local vars | |
| 12 | sub $0x1234,%rsp | |
| 13 | .cfi_adjust_cfa_offset 0x1234 | |
| 14 | ||
| 15 | #; dummy body | |
| 16 | movl $1,%eax | |
| 17 | ||
| 18 | #; release space of local vars and return | |
| 19 | add $0x1234,%rsp | |
| 20 | .cfi_adjust_cfa_offset -0x1234 | |
| 21 | ret | |
| 22 | .cfi_endproc | |
| 23 | ||
| 24 | #; func_prologue | |
| 25 | #; - functions that begins with standard | |
| 26 | #; prologue: "pushq %rbp; movq %rsp,%rbp" | |
| 27 | ||
| 28 | .type func_prologue,@function | |
| 29 | func_prologue: | |
| 30 | .cfi_startproc | |
| 31 | ||
| 32 | #; prologue, CFI is valid after | |
| 33 | #; each instruction. | |
| 34 | pushq %rbp | |
| 35 | .cfi_def_cfa_offset 16 | |
| 4b7d318b | 36 | .cfi_offset %rbp, -16 |
| 2ebaa23b | 37 | movq %rsp, %rbp |
| 4b7d318b | 38 | .cfi_def_cfa_register %rbp |
| 2ebaa23b AM |
39 | |
| 40 | #; function body | |
| 41 | call func_locvars | |
| 42 | addl $3, %eax | |
| 43 | ||
| 44 | #; epilogue with valid CFI | |
| 45 | #; (we're better than gcc :-) | |
| 46 | leaveq | |
| 4b7d318b | 47 | .cfi_def_cfa %rsp, 8 |
| 2ebaa23b AM |
48 | ret |
| 49 | .cfi_endproc | |
| 50 | ||
| 51 | #; func_otherreg | |
| 52 | #; - function that moves frame pointer to | |
| 53 | #; another register (r12) and then allocates | |
| 54 | #; a space for local variables | |
| 55 | ||
| 56 | .type func_otherreg,@function | |
| 57 | func_otherreg: | |
| 58 | .cfi_startproc | |
| 59 | ||
| 4b7d318b L |
60 | #; save frame pointer to r8 |
| 61 | movq %rsp,%r8 | |
| 62 | .cfi_def_cfa_register r8 | |
| 2ebaa23b AM |
63 | |
| 64 | #; alocate space for local vars | |
| 65 | #; (no .cfi_{def,adjust}_cfa_offset here, | |
| 4b7d318b | 66 | #; because CFA is computed from r8!) |
| 2ebaa23b AM |
67 | sub $100,%rsp |
| 68 | ||
| 69 | #; function body | |
| 70 | call func_prologue | |
| 71 | addl $2, %eax | |
| 72 | ||
| 4b7d318b L |
73 | #; restore frame pointer from r8 |
| 74 | movq %r8,%rsp | |
| 2ebaa23b AM |
75 | .cfi_def_cfa_register rsp |
| 76 | ret | |
| 77 | .cfi_endproc | |
| 78 | ||
| 79 | #; main | |
| 80 | #; - typical function | |
| 81 | .type main,@function | |
| 82 | main: | |
| 83 | .cfi_startproc | |
| 84 | ||
| 85 | #; only function body that doesn't | |
| 86 | #; touch the stack at all. | |
| 87 | call func_otherreg | |
| 88 | ||
| 89 | #; return | |
| 90 | ret | |
| 91 | .cfi_endproc | |
| 92 | ||
| 93 | #; _start | |
| 94 | #; - standard entry point | |
| 95 | ||
| 96 | .type _start,@function | |
| 97 | .globl _start | |
| 98 | _start: | |
| 99 | .cfi_startproc | |
| 100 | call main | |
| 101 | movq %rax,%rdi | |
| 102 | movq $0x3c,%rax | |
| 103 | syscall | |
| 104 | hlt | |
| 105 | .cfi_endproc | |
| 4b7d318b L |
106 | |
| 107 | #; func_alldirectives | |
| 108 | #; - test for all .cfi directives. | |
| 109 | #; This function is never called and the CFI info doesn't make sense. | |
| 110 | ||
| 111 | .type func_alldirectives,@function | |
| 112 | func_alldirectives: | |
| 113 | .cfi_startproc simple | |
| 114 | .cfi_def_cfa rsp,8 | |
| 115 | nop | |
| 116 | .cfi_def_cfa_offset 16 | |
| 117 | nop | |
| 118 | .cfi_def_cfa_register r8 | |
| 119 | nop | |
| 120 | .cfi_adjust_cfa_offset 0x1234 | |
| 121 | nop | |
| 122 | .cfi_offset %rsi, 0x10 | |
| 123 | nop | |
| 124 | .cfi_register %r8, %r9 | |
| 125 | nop | |
| 126 | .cfi_remember_state | |
| 127 | nop | |
| 128 | .cfi_restore %rbp | |
| 129 | nop | |
| 130 | .cfi_undefined %rip | |
| 131 | nop | |
| 132 | .cfi_same_value rbx | |
| 133 | nop | |
| 134 | .cfi_restore_state | |
| 135 | ret | |
| 136 | .cfi_endproc | |
| a60de03c JB |
137 | |
| 138 | #; func_all_registers | |
| 139 | #; - test for all .cfi register numbers. | |
| 140 | #; This function is never called and the CFI info doesn't make sense. | |
| 141 | ||
| 142 | .type func_all_registers,@function | |
| 143 | func_all_registers: | |
| 144 | .cfi_startproc simple | |
| 145 | ||
| 146 | .cfi_undefined rip ; nop | |
| 147 | .cfi_undefined rax ; nop | |
| 148 | .cfi_undefined rcx ; nop | |
| 149 | .cfi_undefined rdx ; nop | |
| 150 | .cfi_undefined rbx ; nop | |
| 151 | .cfi_undefined rsp ; nop | |
| 152 | .cfi_undefined rbp ; nop | |
| 153 | .cfi_undefined rsi ; nop | |
| 154 | .cfi_undefined rdi ; nop | |
| 155 | .cfi_undefined r8 ; nop | |
| 156 | .cfi_undefined r9 ; nop | |
| 157 | .cfi_undefined r10 ; nop | |
| 158 | .cfi_undefined r11 ; nop | |
| 159 | .cfi_undefined r12 ; nop | |
| 160 | .cfi_undefined r13 ; nop | |
| 161 | .cfi_undefined r14 ; nop | |
| 162 | .cfi_undefined r15 ; nop | |
| 163 | .cfi_undefined rflags ; nop | |
| 164 | ||
| 165 | .cfi_undefined es ; nop | |
| 166 | .cfi_undefined cs ; nop | |
| 167 | .cfi_undefined ds ; nop | |
| 168 | .cfi_undefined ss ; nop | |
| 169 | .cfi_undefined fs ; nop | |
| 170 | .cfi_undefined gs ; nop | |
| 171 | .cfi_undefined tr ; nop | |
| 172 | .cfi_undefined ldtr ; nop | |
| 173 | .cfi_undefined fs.base ; nop | |
| 174 | .cfi_undefined gs.base ; nop | |
| 175 | ||
| 176 | .cfi_undefined mxcsr ; nop | |
| 177 | .cfi_undefined xmm0 ; nop | |
| 178 | .cfi_undefined xmm1 ; nop | |
| 179 | .cfi_undefined xmm2 ; nop | |
| 180 | .cfi_undefined xmm3 ; nop | |
| 181 | .cfi_undefined xmm4 ; nop | |
| 182 | .cfi_undefined xmm5 ; nop | |
| 183 | .cfi_undefined xmm6 ; nop | |
| 184 | .cfi_undefined xmm7 ; nop | |
| 185 | .cfi_undefined xmm8 ; nop | |
| 186 | .cfi_undefined xmm9 ; nop | |
| 187 | .cfi_undefined xmm10 ; nop | |
| 188 | .cfi_undefined xmm11 ; nop | |
| 189 | .cfi_undefined xmm12 ; nop | |
| 190 | .cfi_undefined xmm13 ; nop | |
| 191 | .cfi_undefined xmm14 ; nop | |
| 192 | .cfi_undefined xmm15 ; nop | |
| 193 | ||
| 194 | .cfi_undefined fcw ; nop | |
| 195 | .cfi_undefined fsw ; nop | |
| 196 | .cfi_undefined st ; nop | |
| 197 | .cfi_undefined st(1) ; nop | |
| 198 | .cfi_undefined st(2) ; nop | |
| 199 | .cfi_undefined st(3) ; nop | |
| 200 | .cfi_undefined st(4) ; nop | |
| 201 | .cfi_undefined st(5) ; nop | |
| 202 | .cfi_undefined st(6) ; nop | |
| 203 | .cfi_undefined st(7) ; nop | |
| 204 | ||
| 205 | .cfi_undefined mm0 ; nop | |
| 206 | .cfi_undefined mm1 ; nop | |
| 207 | .cfi_undefined mm2 ; nop | |
| 208 | .cfi_undefined mm3 ; nop | |
| 209 | .cfi_undefined mm4 ; nop | |
| 210 | .cfi_undefined mm5 ; nop | |
| 211 | .cfi_undefined mm6 ; nop | |
| 212 | .cfi_undefined mm7 ; nop | |
| 213 | ||
| 214 | .cfi_endproc |