asm compilation C - c

Question

I have a small program in C that uses the asm() function to use assembly instructions. However, at the time of compilation, it gives me a link error that I can't correct. Indeed as the use of -m32 is necessary in order to use the instruction 'move' I think that it is wrong 'lib' to use.
main.c:
#include <stdio.h>
#include "myJump.h"
static struct ctx_s pctx_buf;
int main() {
int prod1;
prod1 = mul(0);
printf("prod1 = %d\n", prod1);
int prod2;
prod2 = tryIt(&pctx_buf, shintMule, 0);
printf("prod2 = %d\n", prod2);
}
myJump.c:
#include "myJump.h"
#include <stdio.h>
#include <assert.h>
#define CTXMAGIC 0x73478336
static int thr;
static struct ctx_s pctx_buf;
int mul(int d) {
int i;
switch (scanf("%d", &i)) {
case EOF:
return 1;
case 0:
return mul(d + 1);
case 1:
if (i) {
return i * mul(d + 1);
} else {
return 0;
}
}
return 0;
}
int tryIt(struct ctx_s *pctx, funct_t *f, int arg) {
copyBuf(*pctx);
asm("movl %0, %%esp"
:
:"r"(pctx->ctx_esp));
asm("movl %0, %%ebp"
:
:"r"(pctx->ctx_ebp));
pctx->ctx_magic = CTXMAGIC;
return f(arg);
}
void copyBuf(struct ctx_s pctx){
pctx_buf.ctx_ebp = pctx.ctx_ebp;
pctx_buf.ctx_esp = pctx.ctx_esp;
pctx_buf.ctx_magic = pctx.ctx_magic;
}
int throwIt(struct ctx_s *pctx, int r) {
assert( pctx->ctx_magic == CTXMAGIC );
thr = r;
asm("movl %%esp, %0"
:"=r"(pctx->ctx_esp));
asm("movl %%ebp, %0"
:"=r"(pctx->ctx_ebp));
return thr;
}
int shintMule(int d) {
int i;
switch (scanf("%d", &i)) {
case EOF:
return 1;
case 0:
return mul(d + 1);
case 1:
if (i) {
return i * mul(d + 1);
} else {
throwIt(&pctx_buf, 0);
}
}
}
MAKEFILE:
all : main
main : main.o myJump
main.o : main.c myJump.h
gcc -c -O2 -Wall -march='x86-64' main.c
myJump : myJump.o
myJump.o : myJump.c myJump.h
gcc -c -O2 -Wall -march='x86-64' -m32 myJump.c
clean :
rm *.o main
The error after make all:
gcc -c -O2 -Wall -march='x86-64' main.c
gcc -c -O2 -Wall -march='x86-64' -m32 myJump.c
cc myJump.o -o myJump
/usr/bin/ld : architecture i386 du fichier d'entrée « %B » est incompatible avec la sortie ЛZV�U
/usr/bin/ld : /usr/lib/gcc/x86_64-linux-gnu/10/../../../x86_64-linux-gnu/Scrt1.o : dans la fonction « _start » :
(.text+0x20) : référence indéfinie vers « main »
collect2: error: ld returned 1 exit status
make: *** [<commande interne> : myJump] Erreur 1
EDIT1: pass to 64bits
main.c:
the printf it's for debug
#include <stdio.h>
#include "myJump.h"
int main() {
int prod1;
prod1 = mul(0);
printf("prod1 = %d\n", prod1);
printf("0");
struct ctx_s pctx_buf;
int prod2;
printf("1");
prod2 = tryIt(&pctx_buf, shintMule, 0);
printf("10");
printf("prod2 = %d\n", prod2);
}
myJump.c:
#include "myJump.h"
#include <stdio.h>
#include <assert.h>
#define CTXMAGIC 0xDEADBEAF
static int thr;
static struct ctx_s pctx_buf;
int mul(int d) {
int i;
switch (scanf("%d", &i)) {
case EOF:
return 1;
case 0:
return mul(d + 1);
case 1:
if (i) {
return i * mul(d + 1);
} else {
return 0;
}
}
return 0;
}
int tryIt(struct ctx_s *pctx, funct_t *f, int arg) {
copyBuf(*pctx);
asm("mov %0, %%rsp"
:
:"r"(pctx->ctx_rsp));
asm("mov %0, %%rbp"
:
:"r"(pctx->ctx_rbp));
pctx->ctx_magic = CTXMAGIC;
return f(arg);
}
void copyBuf(struct ctx_s pctx){
pctx_buf.ctx_rbp = pctx.ctx_rbp;
pctx_buf.ctx_rsp = pctx.ctx_rsp;
pctx_buf.ctx_magic = pctx.ctx_magic;
}
int throwIt(struct ctx_s *pctx, int r) {
assert( pctx->ctx_magic == CTXMAGIC );
thr = r;
asm("mov %%rsp, %0"
:"=r"(pctx->ctx_rsp));
asm("mov %%rbp, %0"
:"=r"(pctx->ctx_rbp));
return thr;
}
int shintMule(int d) {
int i;
switch (scanf("%d", &i)) {
case EOF:
return 1;
case 0:
return mul(d + 1);
case 1:
if (i) {
return i * mul(d + 1);
} else {
throwIt(&pctx_buf, 0);
}
}
return 0;
}