tcc-stupidos/lib/bt-exe.c
herman ten brugge 18808e325f Update dwarf2 support
tccgen.c:
- add anon support. So tcc_state in tcc works now.
- add function pointer support
- remove DW_FORM_implicit_const from DW_TAG_pointer_type

tccrun.c:
- set initial file name
- correctly use pc in DW_LNE_set_address (see lib/bt-exe.c)
- add DW_LNE_define_file support (even if it is deprecated)

tccelf.c
- do not include debug/test_coverage information for stub functions

lib/bt-exe.c
- use num_callers=-1 to mark dll
2022-05-07 06:54:13 +02:00

46 lines
1.3 KiB
C

/* ------------------------------------------------------------- */
/* for linking rt_printline and the signal/exception handler
from tccrun.c into executables. */
#define CONFIG_TCC_BACKTRACE_ONLY
#include "../tccrun.c"
int (*__rt_error)(void*, void*, const char *, va_list);
#ifndef _WIN32
# define __declspec(n)
#endif
__declspec(dllexport)
void __bt_init(rt_context *p, int num_callers)
{
__attribute__((weak)) int main();
__attribute__((weak)) void __bound_init(void*, int);
struct rt_context *rc = &g_rtctxt;
//fprintf(stderr, "__bt_init %d %p %p\n", num_callers, p->stab_sym, p->bounds_start), fflush(stderr);
/* call __bound_init here due to redirection of sigaction */
/* needed to add global symbols */
if (__bound_init && p->bounds_start)
__bound_init(p->bounds_start, -1);
if (num_callers) {
memcpy(rc, p, offsetof(rt_context, next));
rc->num_callers = num_callers - 1;
rc->top_func = main;
__rt_error = _rt_error;
set_exception_handler();
} else {
p->num_callers = -1;
p->next = rc->next, rc->next = p;
}
}
/* copy a string and truncate it. */
static char *pstrcpy(char *buf, size_t buf_size, const char *s)
{
int l = strlen(s);
if (l >= buf_size)
l = buf_size - 1;
memcpy(buf, s, l);
buf[l] = 0;
return buf;
}