80486DX2-66/86Box-fork
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Fixed ISA PNP segmentation faults when card is NULL, fixes the Shuttle HOT-557.

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This commit is contained in:
OBattler
2021-03-20 05:50:37 +01:00
parent 2822e8015a
commit 587d7330e1
1 changed files with 34 additions and 0 deletions
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34
src/device/isapnp.c
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@@ -211,6 +211,11 @@ isapnp_read_data(uint16_t addr, void *priv)
case 0x04: /* Resource Data */
CHECK_CURRENT_CARD();
/* The break; inside CHECK_CURRENT_CARD(); only breaks out of the do { ... } while (0);
so make sure to break again here. */
if (!card)
break;
isapnp_log("ISAPnP: Read resource data index %02X (%02X) from CSN %02X\n", card->rom_pos, card->rom[card->rom_pos], card->csn);
if (card->rom_pos >= card->rom_size)
ret = 0xff;
@@ -223,6 +228,11 @@ isapnp_read_data(uint16_t addr, void *priv)
ret = 0x00;
CHECK_CURRENT_CARD();
/* The break; inside CHECK_CURRENT_CARD(); only breaks out of the do { ... } while (0);
so make sure to break again here. */
if (!card)
break;
isapnp_log("ISAPnP: Query status for CSN %02X\n", card->csn);
ret = 0x01;
@@ -232,6 +242,11 @@ isapnp_read_data(uint16_t addr, void *priv)
ret = 0x00;
CHECK_CURRENT_CARD();
/* The break; inside CHECK_CURRENT_CARD(); only breaks out of the do { ... } while (0);
so make sure to break again here. */
if (!card)
break;
isapnp_log("ISAPnP: Query CSN %02X\n", card->csn);
ret = card->csn;
@@ -251,7 +266,14 @@ isapnp_read_data(uint16_t addr, void *priv)
case 0x28: case 0x29: case 0x2a: case 0x2b:
case 0x2c: case 0x2d: case 0x2e: case 0x2f:
CHECK_CURRENT_CARD();
/* The break; inside CHECK_CURRENT_CARD(); only breaks out of the do { ... } while (0);
so make sure to break again here. */
if (!card)
break;
isapnp_log("ISAPnP: Read vendor-defined register %02X from CSN %02X\n", dev->reg, card->csn);
if (card->read_vendor_reg)
ret = card->read_vendor_reg(0, dev->reg, card->priv);
break;
@@ -422,6 +444,11 @@ isapnp_write_data(uint16_t addr, uint8_t val, void *priv)
case 0x07: /* Logical Device Number */
CHECK_CURRENT_CARD();
/* The break; inside CHECK_CURRENT_CARD(); only breaks out of the do { ... } while (0);
so make sure to break again here. */
if (!card)
break;
ld = card->first_ld;
while (ld) {
if (ld->number == val) {
@@ -486,7 +513,14 @@ isapnp_write_data(uint16_t addr, uint8_t val, void *priv)
case 0x28: case 0x29: case 0x2a: case 0x2b:
case 0x2c: case 0x2d: case 0x2e: case 0x2f:
CHECK_CURRENT_CARD();
/* The break; inside CHECK_CURRENT_CARD(); only breaks out of the do { ... } while (0);
so make sure to break again here. */
if (!card)
break;
isapnp_log("ISAPnP: Write %02X to vendor-defined register %02X on CSN %02X\n", val, dev->reg, card->csn);
if (card->write_vendor_reg)
card->write_vendor_reg(0, dev->reg, val, card->priv);
break;