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Use raw HP diffs with simple BattleParam scanner

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This commit is contained in:
Incentive
2026-06-06 22:06:06 -04:00
parent eba565c381
commit c7fb0cf5f6
2 changed files with 23 additions and 29 deletions
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src/SendCommands.cc
+9 -11
View File
@@ -846,10 +846,9 @@ static std::shared_ptr<AsyncPromise<C_ExecuteCodeResult_B3>> send_brutal_peeps_h
constexpr uint32_t scan_start = 0x16760000;
constexpr uint32_t scan_end = 0x16A90000;
constexpr uint32_t signature_offset = 0x00002800;
constexpr uint32_t signature_size = 0x80;
constexpr uint32_t signature_size = 64;
if (bp_entry->size < (signature_offset + signature_size)) {
if (bp_entry->size < signature_size) {
c->log.warning_f("Skipping Brutal Peeps HP client patch: BattleParamEntry_on.dat too small for signature");
return nullptr;
}
@@ -864,10 +863,9 @@ static std::shared_ptr<AsyncPromise<C_ExecuteCodeResult_B3>> send_brutal_peeps_h
std::string suffix;
append_u32l(suffix, scan_start);
append_u32l(suffix, scan_end);
append_u32l(suffix, signature_offset);
append_u32l(suffix, signature_size);
append_u32l(suffix, 0); // patched below after diff generation
suffix.append(vanilla_data + signature_offset, signature_size);
suffix.append(vanilla_data, signature_size);
uint32_t patch_entry_count = 0;
for (uint32_t offset = 0; offset < target_data.size(); offset++) {
@@ -882,10 +880,10 @@ static std::shared_ptr<AsyncPromise<C_ExecuteCodeResult_B3>> send_brutal_peeps_h
patch_entry_count++;
}
suffix[16] = static_cast<char>(patch_entry_count & 0xFF);
suffix[17] = static_cast<char>((patch_entry_count >> 8) & 0xFF);
suffix[18] = static_cast<char>((patch_entry_count >> 16) & 0xFF);
suffix[19] = static_cast<char>((patch_entry_count >> 24) & 0xFF);
suffix[12] = static_cast<char>(patch_entry_count & 0xFF);
suffix[13] = static_cast<char>((patch_entry_count >> 8) & 0xFF);
suffix[14] = static_cast<char>((patch_entry_count >> 16) & 0xFF);
suffix[15] = static_cast<char>((patch_entry_count >> 24) & 0xFF);
auto fn = s->client_functions->get("PsoPeepsBrutalPeepsHP", c->specific_version);
@@ -902,8 +900,8 @@ static std::shared_ptr<AsyncPromise<C_ExecuteCodeResult_B3>> send_brutal_peeps_h
c->enabled_flags |= fn->client_flag;
c->log.info_f("Brutal Peeps HP client patch sent: tier={} mult={:g} patch_entries={} signature_offset={:05X} scan={:08X}-{:08X}",
tier, mult, patch_entry_count, signature_offset, scan_start, scan_end);
c->log.info_f("Brutal Peeps HP client patch sent: tier={} mult={:g} patch_entries={} scan={:08X}-{:08X}",
tier, mult, patch_entry_count, scan_start, scan_end);
return promise;
system/client-functions/PsoPeepsBrutalPeepsHPBB.s
+14 -18
View File
@@ -20,21 +20,21 @@ start:
get_data_ptr_ret:
pop ebx # ebx = suffix payload
mov esi, [ebx] # scan_start, scans for signature address, not table base
mov esi, [ebx] # scan_start
mov edx, [ebx + 4] # scan_end
mov ecx, [ebx + 8] # signature_size
sub edx, ecx # scan limit = end - sig_size
lea edi, [ebx + 16] # signature ptr
scan_again:
mov edx, [ebx + 4] # scan_end
mov ecx, [ebx + 12] # signature_size
sub edx, ecx # scan limit = end - sig_size
cmp esi, edx
ja not_found
xor ebp, ebp
lea edi, [ebx + 20] # signature ptr
compare_again:
cmp ebp, ecx
jae found_signature
jae found_table
mov al, [esi + ebp]
cmp al, [edi + ebp]
@@ -47,14 +47,11 @@ next_candidate:
inc esi
jmp scan_again
found_signature:
# esi = signature address; table base = esi - signature_offset
mov ebp, esi
sub ebp, [ebx + 8] # ebp = BattleParam table base
mov ecx, [ebx + 16] # patch entry count
mov edi, [ebx + 12] # signature_size
lea edi, [ebx + edi + 20] # patch entries after header+signature
found_table:
# esi = BattleParamEntry_on.dat base
mov ecx, [ebx + 12] # patch entry count
mov edi, [ebx + 8] # signature_size
lea edi, [ebx + edi + 16] # patch entries after header+signature
patch_again:
test ecx, ecx
@@ -62,14 +59,14 @@ patch_again:
mov edx, [edi] # offset from table base
mov al, [edi + 4] # byte value
mov [ebp + edx], al
mov [esi + edx], al
add edi, 5
dec ecx
jmp patch_again
done:
mov eax, ebp # return found table base
mov eax, esi # return found table base
jmp return
not_found:
@@ -88,10 +85,9 @@ 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 from table+signature_offset
# signature bytes from table start
# repeated patch entries:
# uint32_t offset
# uint8_t value