kk Blog —— 通用基础


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ARM汇编简单样例

例一

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.section .data
	.align 2
	.LC0: .string "gggghhhii"

.section .text
	.align 2
	.global main
	.type   main, %function
main:
	stmfd   sp!, {fp, lr} 
	ldr     r0, .L0 
	bl      puts
	ldmfd   sp!, {fp, pc} 

.L0: .word .LC0
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android-ndk-r9d/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/arm-linux-androideabi-as b.s -o b.o

/home/kk/android/android-ndk-r9d/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/arm-linux-androideabi-ld -dynamic-linker /system/bin/linker -X -m armelf_linux_eabi -z noexecstack -z relro -z now crtbegin_dynamic.o -L/home/kk/android/android-ndk-r9d/platforms/android-19/arch-arm/usr/lib/ -L/home/kk/android/android-ndk-r9d/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6 -L/home/kk/android/android-ndk-r9d/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/../lib/gcc -L/home/kk/android/android-ndk-r9d/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/../lib/gcc/arm-linux-androideabi/4.6/../../../../arm-linux-androideabi/lib b.o -lgcc -lc -ldl -lgcc crtend_android.o -o b.out

例二

a.c

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#include <stdio.h>

int i=12;
int j;

int main()
{
	i = 34; 
	j = 56; 
	printf("Hello World\n");
	return 0;
}
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/home/kk/android/android-ndk-r9d/toolchains/arm-linux-androideabi-4.6/prebuilt/linux-x86_64/bin/arm-linux-androideabi-gcc -I/home/kk/android/android-ndk-r9d/platforms/android-19/arch-arm/usr/include -L/home/kk/android/android-ndk-r9d/platforms/android-19/arch-arm/usr/lib/ -S a.c
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.arch armv5te
.fpu softvfp
.eabi_attribute 20, 1
.eabi_attribute 21, 1
.eabi_attribute 23, 3
.eabi_attribute 24, 1
.eabi_attribute 25, 1
.eabi_attribute 26, 2
.eabi_attribute 30, 6
.eabi_attribute 18, 4
.file   "a.c"
.global i
.data
.align  2
.type   i, %object
.size   i, 4
i:
.word   12  
.comm   j,4,4
.section        .rodata
.align  2
.LC0:
.ascii  "Hello World\000"
.text
.align  2
.global main
.type   main, %function
main:
@ args = 0, pretend = 0, frame = 0 
@ frame_needed = 1, uses_anonymous_args = 0 
stmfd   sp!, {fp, lr} 
add     fp, sp, #4
ldr     r3, .L2 
.LPIC0:
add     r3, pc, r3
ldr     r2, .L2+4
ldr     r2, [r3, r2] 
mov     r1, #34 
str     r1, [r2, #0] 
ldr     r2, .L2+8
ldr     r3, [r3, r2] 
mov     r2, #56 
str     r2, [r3, #0] 
ldr     r3, .L2+12
.LPIC1:
add     r3, pc, r3
mov     r0, r3
bl      puts(PLT)
mov     r3, #0
mov     r0, r3
ldmfd   sp!, {fp, pc}
.L3:
.align  2
.L2:
.word   _GLOBAL_OFFSET_TABLE_-(.LPIC0+8)
.word   i(GOT)
.word   j(GOT)
.word   .LC0-(.LPIC1+8)
.size   main, .-main
.ident  "GCC: (GNU) 4.6 20120106 (prerelease)"
.section        .note.GNU-stack,"",%progbits