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Merge pull request #12667 from JosJuice/ipl-oob

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Core: Fix IPL device m_cursor overflow
This commit is contained in:
Admiral H. Curtiss 2024-03-26 05:10:52 +01:00 committed by GitHub
commit 1efda863e4
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1 changed files with 13 additions and 16 deletions
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29
Source/Core/Core/HW/EXI/EXI_DeviceIPL.cpp
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@ -296,10 +296,6 @@ void CEXIIPL::TransferByte(u8& data)
DEBUG_LOG_FMT(EXPANSIONINTERFACE, "IPL-DEV data {} {:08x} {:02x}",
m_command.is_write() ? "write" : "read", address, data);
#define IN_RANGE(x) (address >= x##_BASE && address < x##_BASE + x##_SIZE)
#define DEV_ADDR(x) (address - x##_BASE)
#define DEV_ADDR_CURSOR(x) (DEV_ADDR(x) + m_cursor++)
auto UartFifoAccess = [&]() {
if (m_command.is_write())
{
@ -323,7 +319,9 @@ void CEXIIPL::TransferByte(u8& data)
{
if (!m_command.is_write())
{
u32 dev_addr = DEV_ADDR_CURSOR(ROM);
u32 dev_addr = address - ROM_BASE + m_cursor++;
// TODO: Is this address wrapping correct? Needs a hardware test
dev_addr %= ROM_SIZE;
// Technically we should descramble here iff descrambling logic is enabled.
// At the moment, we pre-decrypt the whole thing and
// ignore the "enabled" bit - see CEXIIPL::CEXIIPL
@ -346,18 +344,20 @@ void CEXIIPL::TransferByte(u8& data)
}
}
}
else if (IN_RANGE(SRAM))
else if (address >= SRAM_BASE && address < SRAM_BASE + SRAM_SIZE)
{
auto& sram = m_system.GetSRAM();
u32 dev_addr = DEV_ADDR_CURSOR(SRAM);
u32 dev_addr = address - SRAM_BASE + m_cursor++;
// TODO: Is this address wrapping correct? Needs a hardware test
dev_addr %= SRAM_SIZE;
if (m_command.is_write())
sram[dev_addr] = data;
else
data = sram[dev_addr];
}
else if (IN_RANGE(UART))
else if (address >= UART_BASE && address < UART_BASE + UART_SIZE)
{
switch (DEV_ADDR(UART))
switch (address - UART_BASE)
{
case 0:
// Seems to be 16byte fifo
@ -371,16 +371,17 @@ void CEXIIPL::TransferByte(u8& data)
break;
}
}
else if (IN_RANGE(WII_RTC) && DEV_ADDR(WII_RTC) == 0x20)
else if (address >= WII_RTC_BASE && address < WII_RTC_BASE + WII_RTC_SIZE &&
address - WII_RTC_BASE == 0x20)
{
if (m_command.is_write())
g_rtc_flags.m_hex = data;
else
data = g_rtc_flags.m_hex;
}
else if (IN_RANGE(EUART))
else if (address >= EUART_BASE && address < EUART_BASE + EUART_SIZE)
{
switch (DEV_ADDR(EUART))
switch (address - EUART_BASE)
{
case 0:
// Writes 0xf2 then 0xf3 on EUART init. Just need to return non-zero
@ -395,10 +396,6 @@ void CEXIIPL::TransferByte(u8& data)
{
NOTICE_LOG_FMT(EXPANSIONINTERFACE, "IPL-DEV Accessing unknown device");
}
#undef DEV_ADDR_CURSOR
#undef DEV_ADDR
#undef IN_RANGE
}
}