| 1 | #; $ as -o test.o gas-cfi-test.s && gcc -nostdlib -o test test.o |
| 2 | |
| 3 | .text |
| 4 | |
| 5 | #; func_locvars |
| 6 | #; - function with a space on the stack |
| 7 | #; allocated for local variables |
| 8 | |
| 9 | .type func_locvars,@function |
| 10 | func_locvars: |
| 11 | .cfi_startproc |
| 12 | |
| 13 | #; alocate space for local vars |
| 14 | suba.w #0x1234,%sp |
| 15 | .cfi_adjust_cfa_offset 0x1234 |
| 16 | |
| 17 | #; dummy body |
| 18 | moveq.l #1,%d0 |
| 19 | |
| 20 | #; release space of local vars and return |
| 21 | adda.w #0x1234,%sp |
| 22 | .cfi_adjust_cfa_offset -0x1234 |
| 23 | rts |
| 24 | .cfi_endproc |
| 25 | |
| 26 | #; func_prologue |
| 27 | #; - functions that begins with standard |
| 28 | #; prologue: "link %a6,#0" |
| 29 | |
| 30 | .type func_prologue,@function |
| 31 | func_prologue: |
| 32 | .cfi_startproc |
| 33 | |
| 34 | #; prologue, CFI is valid after |
| 35 | #; each instruction. |
| 36 | link %a6,#0 |
| 37 | .cfi_def_cfa_offset 8 |
| 38 | .cfi_offset a6,-8 |
| 39 | .cfi_def_cfa_register a6 |
| 40 | |
| 41 | #; function body |
| 42 | jbsr func_locvars |
| 43 | addq.l #3, %d0 |
| 44 | |
| 45 | #; epilogue with valid CFI |
| 46 | #; (we're better than gcc :-) |
| 47 | unlk %a6 |
| 48 | .cfi_def_cfa_register sp |
| 49 | rts |
| 50 | .cfi_endproc |
| 51 | |
| 52 | #; main |
| 53 | #; - typical function |
| 54 | .type main,@function |
| 55 | main: |
| 56 | .cfi_startproc |
| 57 | |
| 58 | #; only function body that doesn't |
| 59 | #; touch the stack at all. |
| 60 | jbsr func_prologue |
| 61 | |
| 62 | #; return |
| 63 | rts |
| 64 | .cfi_endproc |