How to understand the output of gcc -S *.cpp?
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by user198729
on Stack Overflow
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Published on 2010-03-29T03:07:27Z
Indexed on
2010/03/29
3:13 UTC
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Hit count: 488
A sample one as follows:
.file "hw.cpp"
.section .rdata,"dr"
LC0:
.ascii "Oh shit really bad~!\15\12\0"
.text
.align 2
.globl __Z3badv
.def __Z3badv; .scl 2; .type 32; .endef
__Z3badv:
pushl %ebp
movl %esp, %ebp
subl $8, %esp
movl $LC0, (%esp)
call _printf
leave
ret
.section .rdata,"dr"
LC1:
.ascii "WOW\0"
.text
.align 2
.globl __Z3foov
.def __Z3foov; .scl 2; .type 32; .endef
__Z3foov:
pushl %ebp
movl %esp, %ebp
subl $4, %esp
movl LC1, %eax
movl %eax, -4(%ebp)
movl $__Z3badv, 4(%ebp)
leave
ret
.def ___main; .scl 2; .type 32; .endef
.align 2
.globl _main
.def _main; .scl 2; .type 32; .endef
_main:
pushl %ebp
movl %esp, %ebp
subl $8, %esp
andl $-16, %esp
movl $0, %eax
addl $15, %eax
addl $15, %eax
shrl $4, %eax
sall $4, %eax
movl %eax, -4(%ebp)
movl -4(%ebp), %eax
call __alloca
call ___main
call __Z3foov
movl $0, %eax
leave
ret
.def _printf; .scl 2; .type 32; .endef
Has anyone tried to understand it?
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