Subversion Repositories openrisc_2011-10-31

#; $ as -o test.o gas-cfi-test.s && gcc -nostdlib -o test test.o

        .text

#; func_locvars

#; - function with a space on the stack 

#;   allocated for local variables

        .type   func_locvars,@function

func_locvars:

        .cfi_startproc

        #; alocate space for local vars

        suba.w  #0x1234,%sp

        .cfi_adjust_cfa_offset  0x1234

        #; dummy body

        moveq.l #1,%d0

        #; release space of local vars and return

        adda.w  #0x1234,%sp

        .cfi_adjust_cfa_offset  -0x1234

        rts

        .cfi_endproc

#; func_prologue

#; - functions that begins with standard

#;   prologue: "link %a6,#0"

        .type   func_prologue,@function

func_prologue:

        .cfi_startproc

        #; prologue, CFI is valid after 

        #; each instruction.

        link    %a6,#0

        .cfi_def_cfa_offset     8

        .cfi_offset             a6,-8

        .cfi_def_cfa_register   a6

        #; function body

        jbsr    func_locvars

        addq.l  #3, %d0

        #; epilogue with valid CFI

        #; (we're better than gcc :-)

        unlk    %a6

        .cfi_def_cfa_register   sp

        rts

        .cfi_endproc

#; main

#; - typical function

        .type   main,@function

main:

        .cfi_startproc

        #; only function body that doesn't

        #; touch the stack at all.

        jbsr    func_prologue

        #; return

        rts

        .cfi_endproc