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Add check for ACPI version during parsing tables, fix #1883

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Tomasz Gajewski 2016-02-14 12:24:56 +01:00 committed by Christian Helmuth
parent ed54bb2724
commit 74dd356dcd
1 changed files with 2 additions and 1 deletions
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repos/os/src/drivers/acpi/acpi.cc
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@ -1223,10 +1223,11 @@ class Acpi_table
addr_t const rsdt = rsdp->rsdt; addr_t const rsdt = rsdp->rsdt;
addr_t const xsdt = rsdp->xsdt; addr_t const xsdt = rsdp->xsdt;
uint8_t const acpi_revision = rsdp->revision;
/* drop rsdp io_mem mapping since rsdt/xsdt may overlap */ /* drop rsdp io_mem mapping since rsdt/xsdt may overlap */
env()->parent()->close(io_mem); env()->parent()->close(io_mem);
if (xsdt && sizeof(addr_t) != sizeof(uint32_t)) { if (acpi_revision != 0 && xsdt && sizeof(addr_t) != sizeof(uint32_t)) {
/* running 64bit and xsdt is valid */ /* running 64bit and xsdt is valid */
Table_wrapper table(xsdt); Table_wrapper table(xsdt);
uint64_t * entries = reinterpret_cast<uint64_t *>(table.table() + 1); uint64_t * entries = reinterpret_cast<uint64_t *>(table.table() + 1);