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Detect MMIO writes via eieio

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Sajid
2024-11-24 15:36:50 +06:00
parent 4357a55eff
commit e5317bda48
3 changed files with 43 additions and 17 deletions
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16
PowerUtils/ppc_context.h
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@@ -29,11 +29,27 @@
#define PPC_LOAD_U32(x) __builtin_bswap32(*(volatile uint32_t*)(base + (x)))
#define PPC_LOAD_U64(x) __builtin_bswap64(*(volatile uint64_t*)(base + (x)))
// TODO: Implement.
// These are currently unused. However, MMIO loads could possibly be handled statically with some profiling and a fallback.
// The fallback would be a runtime exception handler which will intercept reads from MMIO regions
// and log the PC for compiling to static code later.
#define PPC_MM_LOAD_U8(x) PPC_LOAD_U8 (x)
#define PPC_MM_LOAD_U16(x) PPC_LOAD_U16(x)
#define PPC_MM_LOAD_U32(x) PPC_LOAD_U32(x)
#define PPC_MM_LOAD_U64(x) PPC_LOAD_U64(x)
#define PPC_STORE_U8(x, y) *(volatile uint8_t*)(base + (x)) = (y)
#define PPC_STORE_U16(x, y) *(volatile uint16_t*)(base + (x)) = __builtin_bswap16(y)
#define PPC_STORE_U32(x, y) *(volatile uint32_t*)(base + (x)) = __builtin_bswap32(y)
#define PPC_STORE_U64(x, y) *(volatile uint64_t*)(base + (x)) = __builtin_bswap64(y)
// MMIO Store handling is completely reliant on being preeceded by eieio.
// TODO: Verify if that's always the case.
#define PPC_MM_STORE_U8(x, y) PPC_STORE_U8 (x, y)
#define PPC_MM_STORE_U16(x, y) PPC_STORE_U16(x, y)
#define PPC_MM_STORE_U32(x, y) PPC_STORE_U32(x, y)
#define PPC_MM_STORE_U64(x, y) PPC_STORE_U64(x, y)
#define PPC_CALL_FUNC(x) x(ctx, base)
#define PPC_CALL_INDIRECT_FUNC(x) (*(PPCFunc**)(ctx.fn + uint64_t(x) * 2))(ctx, base)