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Fix the function _hook_determine_start so the monitor works on modern win10 OS #87

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Fix the function _hook_determine_start so the monitor works on modern win10 OS #87

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1c179cd
fix bug to compile the monitor dll
Jul 22, 2022
ed2935d
fix _hook_determine_start function so the monitor doesn't crash on mo…
Jul 22, 2022
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15 changes: 10 additions & 5 deletions src/hooking.c
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Original file line number Diff line number Diff line change
Expand Up @@ -571,12 +571,17 @@ static int _hook_determine_start(hook_t *h)
continue;
}

// jmp dword [addr]
if(*addr == 0xff && addr[1] == 0x25) {
unhook_detect_add_region(h->funcname, addr, addr, addr, 6);

// jmp dword [addr] / jmp qword [addr]
if((*addr == 0xff && addr[1] == 0x25) || (*addr == 0x48 && addr[1] == 0xff && addr[2] == 0x25)) {
if(*addr == 0xff)
unhook_detect_add_region(h->funcname, addr, addr, addr, 6);
else
unhook_detect_add_region(h->funcname, addr, addr, addr, 7);
#if __x86_64__
addr += *(int32_t *)(addr + 2) + 6;
if(*addr == 0xff)
addr += *(int32_t *)(addr + 2) + 6;
else
addr += *(int32_t *)(addr + 3) + 7;
#else
addr = *(uint8_t **)(addr + 2);
#endif
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4 changes: 2 additions & 2 deletions utils/process.py
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Original file line number Diff line number Diff line change
Expand Up @@ -467,7 +467,7 @@ def process(self):
sigs.append({
"library": insn["module_clean"],
"apiname": insn["funcname"],
"ignore": last == insn["funcname"],
"ignore": last == insn["module"] + insn["funcname"],
"is_insn": True,
"is_hook": True,
"signature": {
Expand All @@ -479,7 +479,7 @@ def process(self):
},
"logging": logging,
})
last = insn["funcname"]
last = insn["module"] + insn["funcname"]

# Assign hook indices accordingly (in a sorted manner).
for idx, sig in enumerate(sigs):
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