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* support patching multiple DLDI interfaces

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* fix the DLDI size entry
fixes the Smash demo
This commit is contained in:
Arisotura 2022-03-12 21:52:29 +01:00
parent cce9de5ee1
commit f7fa0dda50
3 changed files with 34 additions and 35 deletions
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66
src/NDSCart.cpp
View File

@ -1291,40 +1291,8 @@ void CartHomebrew::ROMCommandFinish(u8* cmd, u8* data, u32 len)
}
}
void CartHomebrew::ApplyDLDIPatch(const u8* patch, u32 patchlen, bool readonly)
void CartHomebrew::ApplyDLDIPatchAt(u8* binary, u32 dldioffset, const u8* patch, u32 patchlen, bool readonly)
{
u32 offset = *(u32*)&ROM[0x20];
u32 size = *(u32*)&ROM[0x2C];
u8* binary = &ROM[offset];
u32 dldioffset = 0;
for (u32 i = 0; i < size; i++)
{
if (*(u32*)&binary[i ] == 0xBF8DA5ED &&
*(u32*)&binary[i+4] == 0x69684320 &&
*(u32*)&binary[i+8] == 0x006D6873)
{
dldioffset = i;
break;
}
}
if (!dldioffset)
{
return;
}
printf("DLDI structure found at %08X (%08X)\n", dldioffset, offset+dldioffset);
if (*(u32*)&patch[0] != 0xBF8DA5ED ||
*(u32*)&patch[4] != 0x69684320 ||
*(u32*)&patch[8] != 0x006D6873)
{
printf("bad DLDI patch\n");
return;
}
if (patch[0x0D] > binary[dldioffset+0x0F])
{
printf("DLDI driver ain't gonna fit, sorry\n");
@ -1421,7 +1389,37 @@ void CartHomebrew::ApplyDLDIPatch(const u8* patch, u32 patchlen, bool readonly)
*(u32*)&binary[writesec_addr+0x04] = 0xE12FFF1E; // bx lr
}
printf("applied DLDI patch\n");
printf("applied DLDI patch at %08X\n", dldioffset);
}
void CartHomebrew::ApplyDLDIPatch(const u8* patch, u32 patchlen, bool readonly)
{
if (*(u32*)&patch[0] != 0xBF8DA5ED ||
*(u32*)&patch[4] != 0x69684320 ||
*(u32*)&patch[8] != 0x006D6873)
{
printf("bad DLDI patch\n");
return;
}
u32 offset = *(u32*)&ROM[0x20];
u32 size = *(u32*)&ROM[0x2C];
u8* binary = &ROM[offset];
for (u32 i = 0; i < size; )
{
if (*(u32*)&binary[i ] == 0xBF8DA5ED &&
*(u32*)&binary[i+4] == 0x69684320 &&
*(u32*)&binary[i+8] == 0x006D6873)
{
printf("DLDI structure found at %08X (%08X)\n", i, offset+i);
ApplyDLDIPatchAt(binary, i, patch, patchlen, readonly);
i += patchlen;
}
else
i++;
}
}
void CartHomebrew::ReadROM_B7(u32 addr, u32 len, u8* data, u32 offset)

1
src/NDSCart.h
View File

@ -188,6 +188,7 @@ public:
void ROMCommandFinish(u8* cmd, u8* data, u32 len) override;
private:
void ApplyDLDIPatchAt(u8* binary, u32 dldioffset, const u8* patch, u32 patchlen, bool readonly);
void ApplyDLDIPatch(const u8* patch, u32 patchlen, bool readonly);
void ReadROM_B7(u32 addr, u32 len, u8* data, u32 offset);

2
src/melonDLDI.h
View File

@ -21,7 +21,7 @@
const u8 melonDLDI[] =
{
0xED, 0xA5, 0x8D, 0xBF, 0x20, 0x43, 0x68, 0x69, 0x73, 0x68, 0x6D, 0x00, 0x01, 0x01, 0x00, 0x00,
0xED, 0xA5, 0x8D, 0xBF, 0x20, 0x43, 0x68, 0x69, 0x73, 0x68, 0x6D, 0x00, 0x01, 0x09, 0x00, 0x00,
0x6D, 0x65, 0x6C, 0x6F, 0x6E, 0x44, 0x53, 0x20, 0x44, 0x4C, 0x44, 0x49, 0x20, 0x64, 0x72, 0x69,
0x76, 0x65, 0x72, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,