316bbf6b92
the reference is from https://gcc.gnu.org/onlinedocs/gcc.pdf (5.0.0 pre-release）， section 6.43 （How to Use Inline Assembly Language in C Code） and http://www.ibiblio.org/gferg/ldp/GCC-Inline-Assembly-HOWTO.html syntax of basic asm statement: asm [ volatile ] ( Assembler Instructions ) syntax of extended asm statement asm [volatile] ( Assembler Template : Output Operands [ : Input Operands [ : Clobbers ] ]) Alanpsc, thanks you!
41 lines
1.0 KiB
C
41 lines
1.0 KiB
C
#include <stdio.h>
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void A();
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void B(int a, int b, int c);
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int main()
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{
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A();
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return 0;
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}
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void A()
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{
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unsigned int a = 1;
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unsigned int b = 2;
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unsigned int c = 3;
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B(a,b,c);
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}
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void B(int d, int e, int f)
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{
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int g;
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unsigned int _ebp;
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__asm__(
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"movl %%ebp,%0\n\t" \
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:"=r" (_ebp));
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g=4;
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printf(" [ebp-12] --?? = %p --- %d \n [ebp-08] --?? = %p --- %d \n [ebp-04] --?? = %p --- %d \n [ebp+00] -oebp= %p --- %p \n [ebp+04] -ret = %p --- %p \n [ebp+08] -- d = %p --- %d \n [ebp+12] -- e = %p --- %d \n [ebp+16] -- f = %p --- %d \n ",
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(unsigned *)(_ebp-12), *(unsigned *)(_ebp-12),
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(unsigned *)(_ebp-8), *(unsigned *)(_ebp-8),
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(unsigned *)(_ebp-4), *(unsigned *)(_ebp-4),
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(unsigned *)(_ebp), *(unsigned *)(_ebp),
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(unsigned *)(_ebp+4), *(unsigned *)(_ebp+4),
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(unsigned *)(_ebp+8), *(unsigned *)(_ebp+8),
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(unsigned *)(_ebp+12), *(unsigned *)(_ebp+12),
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(unsigned *)(_ebp+16), *(unsigned *)(_ebp+16));
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}
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