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| author | gameblabla | 2019-07-18 01:55:57 +0200 |
|---|---|---|
| committer | gameblabla | 2019-07-18 01:55:57 +0200 |
| commit | bd48ba5ea8c87bf8c771550bc5320f7e6f73c9a6 (patch) | |
| tree | 48dfb8f5a7f91e2fbfe9a11bbfe3c3651b901ec1 /libpcsxcore | |
| parent | 76b81516963f0f50049be59172c651b559d9fabf (diff) | |
| download | pcsx_rearmed-bd48ba5ea8c87bf8c771550bc5320f7e6f73c9a6.tar.gz pcsx_rearmed-bd48ba5ea8c87bf8c771550bc5320f7e6f73c9a6.tar.bz2 pcsx_rearmed-bd48ba5ea8c87bf8c771550bc5320f7e6f73c9a6.zip | |
psxbios: Add checks for card_write, card_read
This also implements a bug which allows writes to 0x400
(Is supposed to only accept sector number between 0..3FFh).
Function should return 0 if sector is invalid.
Diffstat (limited to 'libpcsxcore')
| -rw-r--r-- | libpcsxcore/psxbios.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/libpcsxcore/psxbios.c b/libpcsxcore/psxbios.c index 265dbfd..d4a38e1 100644 --- a/libpcsxcore/psxbios.c +++ b/libpcsxcore/psxbios.c @@ -2146,7 +2146,13 @@ void psxBios__card_write() { // 0x4e #ifdef PSXBIOS_LOG PSXBIOS_LOG("psxBios_%s: %x,%x,%x\n", biosB0n[0x4e], a0, a1, a2); #endif - + /* Function also accepts sector 400h (a bug) */ + if (!(a1 <= 0x400)) + { + /* Invalid sectors */ + v0 = 0; pc0 = ra; + return; + } card_active_chan = a0; port = a0 >> 4; @@ -2173,7 +2179,13 @@ void psxBios__card_read() { // 0x4f #ifdef PSXBIOS_LOG PSXBIOS_LOG("psxBios_%s\n", biosB0n[0x4f]); #endif - + /* Function also accepts sector 400h (a bug) */ + if (!(a1 <= 0x400)) + { + /* Invalid sectors */ + v0 = 0; pc0 = ra; + return; + } card_active_chan = a0; port = a0 >> 4; |