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ppcmmu: Check 8 byte alignment spanning pages.

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joevt 2024-03-20 01:34:59 -07:00 committed by dingusdev
parent b9c12e44a4
commit d9b02ecd8d
1 changed files with 12 additions and 6 deletions
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18
cpu/ppc/ppcmmu.cpp
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@ -1197,6 +1197,12 @@ template void mmu_write_vmem<uint64_t>(uint32_t guest_va, uint64_t value);
template <class T> template <class T>
static T read_unaligned(uint32_t guest_va, uint8_t *host_va) static T read_unaligned(uint32_t guest_va, uint8_t *host_va)
{ {
if ((sizeof(T) == 8) && (guest_va & 3)) {
#ifndef PPC_TESTS
ppc_alignment_exception(guest_va);
#endif
}
T result = 0; T result = 0;
// is it a misaligned cross-page read? // is it a misaligned cross-page read?
@ -1222,9 +1228,6 @@ static T read_unaligned(uint32_t guest_va, uint8_t *host_va)
case 4: case 4:
return READ_DWORD_BE_U(host_va); return READ_DWORD_BE_U(host_va);
case 8: case 8:
if (guest_va & 3) {
ppc_alignment_exception(guest_va);
}
return READ_QWORD_BE_U(host_va); return READ_QWORD_BE_U(host_va);
} }
} }
@ -1239,6 +1242,12 @@ template uint64_t read_unaligned<uint64_t>(uint32_t guest_va, uint8_t *host_va);
template <class T> template <class T>
static void write_unaligned(uint32_t guest_va, uint8_t *host_va, T value) static void write_unaligned(uint32_t guest_va, uint8_t *host_va, T value)
{ {
if ((sizeof(T) == 8) && (guest_va & 3)) {
#ifndef PPC_TESTS
ppc_alignment_exception(guest_va);
#endif
}
// is it a misaligned cross-page write? // is it a misaligned cross-page write?
if (((guest_va & 0xFFF) + sizeof(T)) > 0x1000) { if (((guest_va & 0xFFF) + sizeof(T)) > 0x1000) {
#ifdef MMU_PROFILING #ifdef MMU_PROFILING
@ -1268,9 +1277,6 @@ static void write_unaligned(uint32_t guest_va, uint8_t *host_va, T value)
WRITE_DWORD_BE_U(host_va, value); WRITE_DWORD_BE_U(host_va, value);
break; break;
case 8: case 8:
if (guest_va & 3) {
ppc_alignment_exception(guest_va);
}
WRITE_QWORD_BE_U(host_va, value); WRITE_QWORD_BE_U(host_va, value);
break; break;
} }