Comments (1)
Xhook usually configures ELFs that need to be hooked by regular expressions. So ”not finding a symbol name in an ELF“ is not an error.
In addition, hooking are executed asynchronously in batches, and do not return whether the hooking is successful. See:
static void xh_core_hook_impl(xh_core_map_info_t *mi)
{
//init
if(0 != xh_elf_init(&(mi->elf), mi->base_addr, mi->pathname)) return;
//hook
xh_core_hook_info_t *hi;
xh_core_ignore_info_t *ii;
int ignore;
TAILQ_FOREACH(hi, &xh_core_hook_info, link) //find hook info
{
if(0 == regexec(&(hi->pathname_regex), mi->pathname, 0, NULL, 0))
{
ignore = 0;
TAILQ_FOREACH(ii, &xh_core_ignore_info, link) //find ignore info
{
if(0 == regexec(&(ii->pathname_regex), mi->pathname, 0, NULL, 0))
{
if(NULL == ii->symbol) //ignore all symbols
return;
if(0 == strcmp(ii->symbol, hi->symbol)) //ignore the current symbol
{
ignore = 1;
break;
}
}
}
if(0 == ignore)
xh_elf_hook(&(mi->elf), hi->symbol, hi->new_func, hi->old_func);
}
}
}
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