// just like pre_call, wow!
void function_context_begin_invocation(ZzHookFunctionEntry *entry, zpointer next_hop, RegState *rs,
zpointer caller_ret_addr) {
Xdebug("target %p call begin-invocation", entry->target_ptr);
ZzThreadStack *threadstack = ZzGetCurrentThreadStack(entry->thread_local_key);
if (!threadstack) {
threadstack = ZzNewThreadStack(entry->thread_local_key);
}
ZzCallStack *callstack = ZzNewCallStack();
ZzPushCallStack(threadstack, callstack);
/* call pre_call */
if (entry->pre_call) {
PRECALL pre_call;
pre_call = entry->pre_call;
(*pre_call)(rs, (ThreadStack *)threadstack, (CallStack *)callstack);
}
/* set next hop */
if (entry->replace_call) {
*(zpointer *)next_hop = entry->replace_call;
} else {
*(zpointer *)next_hop = entry->on_invoke_trampoline;
}
if (entry->hook_type == HOOK_FUNCTION_TYPE) {
callstack->caller_ret_addr = *(zpointer *)caller_ret_addr;
*(zpointer *)caller_ret_addr = entry->on_leave_trampoline;
}
}
// just like post_call, wow!
void function_context_end_invocation(ZzHookFunctionEntry *entry, zz_ptr_t next_hop, RegState *rs) {
ZZ_DEBUG_LOG("%p call end-invocation", entry->target_ptr);
ZzThreadStack *stack = ZzGetCurrentThreadStack(entry->thread_local_key);
if (!stack) {
#if defined(DEBUG_MODE)
debug_break();
#endif
}
ZzCallStack *callstack = ZzPopCallStack(stack);
/* call post_call */
if (entry->post_call) {
POSTCALL post_call;
HookEntryInfo entry_info;
entry_info.hook_id = entry->id;
entry_info.hook_address = entry->target_ptr;
post_call = entry->post_call;
(*post_call)(rs, (ThreadStack *)stack, (CallStack *)callstack, (const HookEntryInfo *)&entry_info);
}
/* set next hop */
*(zz_ptr_t *)next_hop = callstack->caller_ret_addr;
ZzFreeCallStack(callstack);
}
// just like post_call, wow!
void function_context_end_invocation(ZzHookFunctionEntry *entry, zpointer next_hop, RegState *rs) {
Xdebug("%p call end-invocation", entry->target_ptr);
ZzThreadStack *threadstack = ZzGetCurrentThreadStack(entry->thread_local_key);
if (!threadstack) {
#if defined(DEBUG_MODE)
debug_break();
#endif
}
ZzCallStack *callstack = ZzPopCallStack(threadstack);
/* call post_call */
if (entry->post_call) {
POSTCALL post_call;
post_call = entry->post_call;
(*post_call)(rs, (ThreadStack *)threadstack, (CallStack *)callstack);
}
/* set next hop */
*(zpointer *)next_hop = callstack->caller_ret_addr;
ZzFreeCallStack(callstack);
}
// just like pre_call, wow!
void function_context_begin_invocation(ZzHookFunctionEntry *entry, zz_ptr_t next_hop, RegState *rs,
zz_ptr_t caller_ret_addr) {
ZZ_DEBUG_LOG("target %p call begin-invocation", entry->target_ptr);
/* for easy debug */
// if (!strcmp((char *)(rs->general.regs.x1), "_beginBackgroundTaskWithName:expirationHandler:")) {
// }
ZzThreadStack *stack = ZzGetCurrentThreadStack(entry->thread_local_key);
if (!stack) {
stack = ZzNewThreadStack(entry->thread_local_key);
}
ZzCallStack *callstack = ZzNewCallStack();
ZzPushCallStack(stack, callstack);
/* call pre_call */
if (entry->pre_call) {
PRECALL pre_call;
HookEntryInfo entry_info;
entry_info.hook_id = entry->id;
entry_info.hook_address = entry->target_ptr;
pre_call = entry->pre_call;
(*pre_call)(rs, (ThreadStack *)stack, (CallStack *)callstack, &entry_info);
}
/* set next hop */
if (entry->replace_call) {
*(zz_ptr_t *)next_hop = entry->replace_call;
} else {
*(zz_ptr_t *)next_hop = entry->on_invoke_trampoline;
}
if (entry->hook_type == HOOK_FUNCTION_TYPE) {
callstack->caller_ret_addr = *(zz_ptr_t *)caller_ret_addr;
*(zz_ptr_t *)caller_ret_addr = entry->on_leave_trampoline;
}
}
void function_context_half_invocation(ZzHookFunctionEntry *entry, zpointer next_hop, RegState *rs,
zpointer caller_ret_addr) {
Xdebug("target %p call half-invocation", entry->target_ptr);
ZzThreadStack *threadstack = ZzGetCurrentThreadStack(entry->thread_local_key);
if (!threadstack) {
#if defined(DEBUG_MODE)
debug_break();
#endif
}
ZzCallStack *callstack = ZzPopCallStack(threadstack);
/* call half_call */
if (entry->half_call) {
HALFCALL half_call;
half_call = entry->half_call;
(*half_call)(rs, (ThreadStack *)threadstack, (CallStack *)callstack);
}
/* set next hop */
*(zpointer *)next_hop = (zpointer)entry->target_half_ret_addr;
ZzFreeCallStack(callstack);
}
