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Use table-offset signature for Brutal Peeps HP patch

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Incentive
2026-06-06 21:59:05 -04:00
parent 942dbbc5b9
commit eba565c381
2 changed files with 38 additions and 34 deletions
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system/client-functions/PsoPeepsBrutalPeepsHPBB.s
+27 -25
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@@ -14,28 +14,27 @@ start:
push esi
push edi
push ebp
push 0 # [esp] = last matched table base / 0
jmp get_data_ptr
get_data_ptr_ret:
pop ebx # ebx = suffix payload
pop ebx # ebx = suffix payload
mov esi, [ebx] # scan_start
mov esi, [ebx] # scan_start, scans for signature address, not table base
scan_again:
mov edx, [ebx + 4] # scan_end
mov ecx, [ebx + 8] # signature_size
sub edx, ecx # scan limit = end - sig_size
mov edx, [ebx + 4] # scan_end
mov ecx, [ebx + 12] # signature_size
sub edx, ecx # scan limit = end - sig_size
cmp esi, edx
ja return
ja not_found
xor ebp, ebp
lea edi, [ebx + 16] # signature ptr
lea edi, [ebx + 20] # signature ptr
compare_again:
cmp ebp, ecx
jae found_table
jae found_signature
mov al, [esi + ebp]
cmp al, [edi + ebp]
@@ -48,33 +47,35 @@ next_candidate:
inc esi
jmp scan_again
found_table:
# esi = one matching BattleParam table base
mov [esp], esi # remember last match for return_value
found_signature:
# esi = signature address; table base = esi - signature_offset
mov ebp, esi
sub ebp, [ebx + 8] # ebp = BattleParam table base
mov ecx, [ebx + 12] # patch entry count
mov edi, [ebx + 8] # signature_size
lea edi, [ebx + edi + 16] # patch entries after header+signature
mov ecx, [ebx + 16] # patch entry count
mov edi, [ebx + 12] # signature_size
lea edi, [ebx + edi + 20] # patch entries after header+signature
patch_again:
test ecx, ecx
jz after_patch
jz done
mov edx, [edi] # offset from table base
mov al, [edi + 4] # byte value
mov [esi + edx], al
mov edx, [edi] # offset from table base
mov al, [edi + 4] # byte value
mov [ebp + edx], al
add edi, 5
dec ecx
jmp patch_again
after_patch:
inc esi # continue scanning after this match
jmp scan_again
done:
mov eax, ebp # return found table base
jmp return
not_found:
xor eax, eax
return:
mov eax, [esp] # 0 if none found, else last matched base
add esp, 4
pop ebp
pop edi
pop esi
@@ -87,9 +88,10 @@ get_data_ptr:
# Server suffix starts here:
# uint32_t scan_start
# uint32_t scan_end
# uint32_t signature_offset
# uint32_t signature_size
# uint32_t patch_entry_count
# signature bytes
# signature bytes from table+signature_offset
# repeated patch entries:
# uint32_t offset
# uint8_t value