x86 gcc assembly output help please

Posted by rayfinkle on Stack Overflow See other posts from Stack Overflow or by rayfinkle
Published on 2010-05-24T00:19:40Z Indexed on 2010/05/24 0:20 UTC
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Pasted below is unoptimized GCC assembly output for "int main(){}". I'm relatively good with x86 assembly, but some of this is unfamiliar. Could someone please do a line-by-line walk-through of what's going on here?

Thanks!

    .text
.globl _main
_main:
LFB2:
    pushq   %rbp
LCFI0:
    movq    %rsp, %rbp
LCFI1:
    leave
    ret
LFE2:
    .section __TEXT,__eh_frame,coalesced,no_toc+strip_static_syms+live_support
EH_frame1:
    .set L$set$0,LECIE1-LSCIE1
    .long L$set$0
LSCIE1:
    .long   0x0
    .byte   0x1
    .ascii "zR\0"
    .byte   0x1
    .byte   0x78
    .byte   0x10
    .byte   0x1
    .byte   0x10
    .byte   0xc
    .byte   0x7
    .byte   0x8
    .byte   0x90
    .byte   0x1
    .align 3
LECIE1:
.globl _main.eh
_main.eh:
LSFDE1:
    .set L$set$1,LEFDE1-LASFDE1
    .long L$set$1
LASFDE1:
    .long   LASFDE1-EH_frame1
    .quad   LFB2-.
    .set L$set$2,LFE2-LFB2
    .quad L$set$2
    .byte   0x0
    .byte   0x4
    .set L$set$3,LCFI0-LFB2
    .long L$set$3
    .byte   0xe
    .byte   0x10
    .byte   0x86
    .byte   0x2
    .byte   0x4
    .set L$set$4,LCFI1-LCFI0
    .long L$set$4
    .byte   0xd
    .byte   0x6
    .align 3
LEFDE1:
    .subsections_via_symbols

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x86 gcc assembly output help please - Developer IT

x86 gcc assembly output help please

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