c - gcc - structures as label for debugging -

context:

linux 64.

i way tell gcc keep structure when generating assembly gcc -o0 -s -g myprog.c

by that, mean: instead of referencing structure address, them referenced label. ease parsing without reading source code again.

so, example:

struct mystruct{     int32_t a;     char * b; } 

would become like:

label_mystruct:     -4(label_mystruct)     -12(label_mystruct) 

and example, referenced by:

add $56, -4(label_mystruct) 

currently, referenced like

.globl _main _main: lfb13: lm157:     pushq %rbp  # lcfi27:     movq %rsp, %rbp#, lcfi28:     subq $80, %rsp#,     movl %edi,-68(%rbp) # argc, argc,     movq %rsi,-80(%rbp) # argv, argv      next line culprit:     movq -56(%rbp), %rdx # list, d.3781     movq -16(%rbp), %rax # arr, d.3780     movq %rdx, %rsi # d.3781,     movq %rax, %rdi # d.3780,     call _myaddhu   # 

i

label_mystruct:     -4(label_mystruct)     -12(label_mystruct)  .globl _main _main: lfb13: lm157:     pushq %rbp  # lcfi27:     movq %rsp, %rbp#, lcfi28:     subq $80, %rsp#,     movl %edi,-68(%rbp) # argc, argc,     movq %rsi,-80(%rbp) # argv, argv      fine:     movq label_mystruct, %rdx # list, d.3781     movq -16(%rbp), %rax # arr, d.3780     movq %rdx, %rsi # d.3781,     movq %rax, %rdi # d.3780,     call _myaddhu   # 

question:

is possible gcc , without using external tools?

you if put struct static storage. of course alters meaning of code. example, code

struct {     int a, b; } test;  int settest(int a, b) {     test.a = a;     test.b = b; } 

compiles (cleaned up):

settest:     movl    %edi, test(%rip)     movl    %esi, test+4(%rip)     ret      .comm   test,8,4 

you try pass option -fverbose-asm gcc instructs gcc add annotations might make assembly easier read.