Unix Assembly

Unix Assembly is an actively used assembly language created in 1972. x86 assembly language is a family of backward-compatible assembly languages, which provide some level of compatibility all the way back to the Intel 8008 introduced in April 1972. x86 assembly languages are used to produce object code for the x86 class of processors. Like all assembly languages, it uses short mnemonics to represent the fundamental instructions that the CPU in a computer can understand and follow. Read more on Wikipedia...

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• Unix Assembly ranks in the top 20% of languages
• the Unix Assembly wikipedia page
• Unix Assembly first appeared in 1972
• file extensions for Unix Assembly include s and ms
• See also: assembly-language, x86-isa, mmx, unix, nasm, gas
• I have 45 facts about Unix Assembly. what would you like to know? email me and let me know how I can help.

Example code from Linguist:

 .cstring
LC0:
 .ascii "Hello World\0"
 .text
.globl _main
_main:
LFB3:
 pushq %rbp
LCFI0:
 movq  %rsp, %rbp
LCFI1:
 leaq  LC0(%rip), %rdi
 call  _puts
 movl  $0, %eax
 leave
 ret
LFE3:
 .section __TEXT,__eh_frame,coalesced,no_toc+strip_static_syms+live_support
EH_frame1:
 .set L$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$1
LASFDE1:
 .long LASFDE1-EH_frame1
 .quad LFB3-.
 .set L$set$2,LFE3-LFB3
 .quad L$set$2
 .byte 0x0
 .byte 0x4
 .set L$set$3,LCFI0-LFB3
 .long L$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

Example code from Wikipedia:

cmp	eax, ebx
	jne	do_something
	; ...
do_something:
	; do something here

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Last updated October 14th, 2019