#; $ as -o test.o gas-cfi-test.s && gcc -nostdlib -o test test.o
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#; $ as -o test.o gas-cfi-test.s && gcc -nostdlib -o test test.o
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.text
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.text
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#; func_locvars
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#; func_locvars
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#; - function with a space on the stack
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#; - function with a space on the stack
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#; allocated for local variables
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#; allocated for local variables
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.type func_locvars,@function
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.type func_locvars,@function
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func_locvars:
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func_locvars:
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.cfi_startproc
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.cfi_startproc
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#; alocate space for local vars
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#; alocate space for local vars
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suba.w #0x1234,%sp
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suba.w #0x1234,%sp
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.cfi_adjust_cfa_offset 0x1234
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.cfi_adjust_cfa_offset 0x1234
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#; dummy body
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#; dummy body
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moveq.l #1,%d0
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moveq.l #1,%d0
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#; release space of local vars and return
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#; release space of local vars and return
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adda.w #0x1234,%sp
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adda.w #0x1234,%sp
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.cfi_adjust_cfa_offset -0x1234
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.cfi_adjust_cfa_offset -0x1234
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rts
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rts
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.cfi_endproc
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.cfi_endproc
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#; func_prologue
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#; func_prologue
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#; - functions that begins with standard
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#; - functions that begins with standard
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#; prologue: "link %a6,#0"
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#; prologue: "link %a6,#0"
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.type func_prologue,@function
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.type func_prologue,@function
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func_prologue:
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func_prologue:
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.cfi_startproc
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.cfi_startproc
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#; prologue, CFI is valid after
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#; prologue, CFI is valid after
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#; each instruction.
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#; each instruction.
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link %a6,#0
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link %a6,#0
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.cfi_def_cfa_offset 8
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.cfi_def_cfa_offset 8
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.cfi_offset a6,-8
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.cfi_offset a6,-8
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.cfi_def_cfa_register a6
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.cfi_def_cfa_register a6
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#; function body
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#; function body
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jbsr func_locvars
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jbsr func_locvars
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addq.l #3, %d0
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addq.l #3, %d0
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#; epilogue with valid CFI
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#; epilogue with valid CFI
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#; (we're better than gcc :-)
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#; (we're better than gcc :-)
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unlk %a6
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unlk %a6
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.cfi_def_cfa_register sp
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.cfi_def_cfa_register sp
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rts
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rts
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.cfi_endproc
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.cfi_endproc
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#; main
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#; main
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#; - typical function
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#; - typical function
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.type main,@function
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.type main,@function
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main:
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main:
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.cfi_startproc
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.cfi_startproc
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#; only function body that doesn't
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#; only function body that doesn't
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#; touch the stack at all.
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#; touch the stack at all.
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jbsr func_prologue
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jbsr func_prologue
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#; return
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#; return
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rts
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rts
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.cfi_endproc
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.cfi_endproc
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