Hi everyone,
I am a undergradaute student, and this semester I have a project to port TCC to
a new OS written by our prof.
Basically I want to implement the function that we type in a string in the OS,
and we can compile the string into memory, and get the result. Same as the
illustration for the libtcc.
But I encounter a problem that after I compile my string, I can not get the
main function from symbol table. I am unable to find out why and what happened.
I am thinking it might because I didn’t fill the address for main in when I
invoke tcc_compile_string. But I don’t know how can I check.
Any help will be so great.
Best,
Xuan
#include "tcc.h"
main_func handle_tcc_script(char *tcc_program) {
nk_vc_printf("\nBegin handle_tcc_script 0..");
TCCState *s;
int (*func)();
s = tcc_new();
nk_vc_printf("..10..");
if (!s) {
nk_vc_printf("\nCould not create tcc state\n");
return NULL;
}
nk_vc_printf("..20..");
tcc_set_output_type(s, TCC_OUTPUT_MEMORY);
nk_vc_printf("..30..");
if (tcc_compile_string(s,tcc_program) == -1) {
nk_vc_printf("\nCould not compile program\n");
return NULL;
}
nk_vc_printf("..40..");
if (tcc_relocate(s, TCC_RELOCATE_AUTO) < 0) {
nk_vc_printf("\nCould not relocate program\n");
return NULL;
}
nk_vc_printf("..50..");
func = tcc_get_symbol(s, "main");
if (!func) {
nk_vc_printf("\nCould not find main()\n");
return NULL;
}
nk_vc_printf("..100.. Done handle_tcc_script\n");
return func;
}_______________________________________________
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