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Removed jit for trampolines

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This commit is contained in:
asmodai 2017-01-13 02:12:09 +03:00
parent 6e1a6f8a02
commit 855e14b95e
1 changed files with 15 additions and 43 deletions
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58
metamod/src/callback_jit.cpp
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@ -108,6 +108,10 @@ void CForwardCallbackJIT::naked_main()
// call pre
for (int i = 0, hookid = 0; i < m_jitdata->plugins_count; i++) {
auto plug = &m_jitdata->plugins[i];
if (plug->m_status < PL_RUNNING)
continue;
size_t fn_table = *(size_t *)(size_t(plug) + m_jitdata->table_offset);
// plugin don't want any hooks from that table
@ -185,6 +189,10 @@ void CForwardCallbackJIT::naked_main()
// call post
for (int i = 0, hookid = 0; i < m_jitdata->plugins_count; i++) {
auto plug = &m_jitdata->plugins[i];
if (plug->m_status < PL_RUNNING)
continue;
size_t fn_table = *(size_t *)(size_t(plug) + m_jitdata->post_table_offset);
// plugin don't want any hooks from that table
@ -279,42 +287,6 @@ void CForwardCallbackJIT::call_func(jitasm::Frontend::Reg32 addr)
add(esp, m_jitdata->args_count * sizeof(int));
}
class CSimpleJmp : public jitasm::function<void, CSimpleJmp>
{
public:
CSimpleJmp(size_t addr/*, size_t hook, size_t hook_time, size_t ret_backup*/);
void naked_main();
private:
size_t m_addr;
/*size_t m_hook;
size_t m_hook_time;
size_t m_ret_backup;*/
};
CSimpleJmp::CSimpleJmp(size_t addr/*, size_t hook, size_t hook_time, size_t ret_backup*/) : m_addr(addr)/*, m_hook(hook), m_hook_time(hook_time), m_ret_backup(ret_backup)*/
{
}
void CSimpleJmp::naked_main()
{
/*if (m_hook && m_hook_time == P_PRE) {
mov(ecx, m_hook);
pop(dword_ptr[m_ret_backup]);
call(ecx);
push(dword_ptr[m_ret_backup]);
}*/
jmp(dword_ptr[m_addr]);
/*if (m_hook && m_hook_time == P_POST) {
mov(ecx, m_hook);
pop(dword_ptr[m_ret_backup]);
call(ecx);
push(dword_ptr[m_ret_backup]);
}*/
}
CJit::CJit() : m_callback_allocator(static_allocator::mp_rwx), m_tramp_allocator(static_allocator::mp_rwx)
{
}
@ -335,16 +307,16 @@ size_t CJit::compile_callback(jitdata_t* jitdata)
return (size_t)memcpy(ptr, code, codeSize);
}
size_t CJit::compile_tramp(size_t ptr_to_func/*, size_t hook, size_t hook_time*/)
size_t CJit::compile_tramp(size_t ptr_to_func)
{
CSimpleJmp jmp(ptr_to_func/*, hook, hook_time, size_t(m_static_allocator.allocate(sizeof(int)))*/);
jmp.Assemble();
auto code = (uint8 *)m_tramp_allocator.allocate(2 + sizeof(int));
auto code = jmp.GetCode();
auto codeSize = jmp.GetCodeSize();
auto ptr = m_tramp_allocator.allocate(codeSize);
// jmp dword [ptr_to_func]
code[0] = 0xFFu;
code[1] = 0x25u;
*(size_t *)&code[2] = ptr_to_func;
return (size_t)memcpy(ptr, code, codeSize);
return (size_t)code;
}
void CJit::clear_callbacks()