how do i move the value of %eax to the memory location of %0
int size 10;
long *list = (long*) malloc(size*sizeof(long));
asm(
movl $999, %%eax
movl %eax, (%0) // this is what im trying, how do i fix it?
:"=r"(list)
:"0"(list), "a"(strLen)
);
how do i move the value of %eax to the memory location of %0
int size 10;
long *list = (long*) malloc(size*sizeof(long));
asm(
movl $999, %%eax
movl %eax, (%0) // this is what im trying, how do i fix it?
:"=r"(list)
:"0"(list), "a"(strLen)
);
Jump to PostTry something like below
#include <stdio.h> #include <stdlib.h> unsigned long *lptr = NULL; int main() { lptr = (unsigned long*)malloc(sizeof(unsigned long)); /*check if allocation failed*/ __asm__ ( "movq %0, %%rax\n\t" "movq $6, (%%rax)\n\t" :"=m"(lptr) ); fprintf(stdout, "ans->%lu\n", *lptr); return 0; }
Try something like below
#include <stdio.h>
#include <stdlib.h>
unsigned long *lptr = NULL;
int main()
{
lptr = (unsigned long*)malloc(sizeof(unsigned long));
/*check if allocation failed*/
__asm__ (
"movq %0, %%rax\n\t"
"movq $6, (%%rax)\n\t"
:"=m"(lptr)
);
fprintf(stdout, "ans->%lu\n", *lptr);
return 0;
}
yah..=D that works for me..
and a other question.. if my system is 32bit, i coulnt use 64bit registers?
yah..=D that works for me..
and a other question.. if my system is 32bit, i coulnt use 64bit registers?
Then just replace "%%rax" with "%%eax" and "movq" with "movl"
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