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Util: Fill out and fix big-endian byteswap load/stores

This commit is contained in:
Vicki Pfau 2020-08-29 16:14:00 -07:00
parent f6523e2c01
commit c8028e1a60
2 changed files with 23 additions and 12 deletions
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31
include/mgba-util/common.h
View File

@ -126,7 +126,12 @@ typedef intptr_t ssize_t;
#endif
#if defined __BIG_ENDIAN__
#define LOAD_64BE(DEST, ADDR, ARR) DEST = *(uint64_t*) ((uintptr_t) (ARR) + (size_t) (ADDR))
#define LOAD_32BE(DEST, ADDR, ARR) DEST = *(uint32_t*) ((uintptr_t) (ARR) + (size_t) (ADDR))
#define LOAD_16BE(DEST, ADDR, ARR) DEST = *(uint16_t*) ((uintptr_t) (ARR) + (size_t) (ADDR))
#define STORE_64BE(SRC, ADDR, ARR) *(uint64_t*) ((uintptr_t) (ARR) + (size_t) (ADDR)) = SRC
#define STORE_32BE(SRC, ADDR, ARR) *(uint32_t*) ((uintptr_t) (ARR) + (size_t) (ADDR)) = SRC
#define STORE_16BE(SRC, ADDR, ARR) *(uint16_t*) ((uintptr_t) (ARR) + (size_t) (ADDR)) = SRC
#if defined(__PPC__) || defined(__POWERPC__)
#define LOAD_32LE(DEST, ADDR, ARR) { \
size_t _addr = (ADDR); \
@ -200,12 +205,12 @@ typedef intptr_t ssize_t;
#endif
#elif defined(__llvm__) || (__GNUC__ > 4) || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8)
#define LOAD_64LE(DEST, ADDR, ARR) DEST = __builtin_bswap64(((uint64_t*) ARR)[(ADDR) >> 3])
#define LOAD_32LE(DEST, ADDR, ARR) DEST = __builtin_bswap32(((uint32_t*) ARR)[(ADDR) >> 2])
#define LOAD_16LE(DEST, ADDR, ARR) DEST = __builtin_bswap16(((uint16_t*) ARR)[(ADDR) >> 1])
#define STORE_64LE(SRC, ADDR, ARR) ((uint64_t*) ARR)[(ADDR) >> 3] = __builtin_bswap64(SRC)
#define STORE_32LE(SRC, ADDR, ARR) ((uint32_t*) ARR)[(ADDR) >> 2] = __builtin_bswap32(SRC)
#define STORE_16LE(SRC, ADDR, ARR) ((uint16_t*) ARR)[(ADDR) >> 1] = __builtin_bswap16(SRC)
#define LOAD_64LE(DEST, ADDR, ARR) DEST = __builtin_bswap64(*(uint64_t*) ((uintptr_t) (ARR) + (size_t) (ADDR)))
#define LOAD_32LE(DEST, ADDR, ARR) DEST = __builtin_bswap32(*(uint32_t*) ((uintptr_t) (ARR) + (size_t) (ADDR)))
#define LOAD_16LE(DEST, ADDR, ARR) DEST = __builtin_bswap16(*(uint16_t*) ((uintptr_t) (ARR) + (size_t) (ADDR)))
#define STORE_64LE(SRC, ADDR, ARR) *(uint64_t*) ((uintptr_t) (ARR) + (size_t) (ADDR)) = __builtin_bswap64(SRC)
#define STORE_32LE(SRC, ADDR, ARR) *(uint32_t*) ((uintptr_t) (ARR) + (size_t) (ADDR)) = __builtin_bswap32(SRC)
#define STORE_16LE(SRC, ADDR, ARR) *(uint16_t*) ((uintptr_t) (ARR) + (size_t) (ADDR)) = __builtin_bswap16(SRC)
#else
#error Big endian build not supported on this platform.
#endif
@ -217,9 +222,19 @@ typedef intptr_t ssize_t;
#define STORE_32LE(SRC, ADDR, ARR) *(uint32_t*) ((uintptr_t) (ARR) + (size_t) (ADDR)) = SRC
#define STORE_16LE(SRC, ADDR, ARR) *(uint16_t*) ((uintptr_t) (ARR) + (size_t) (ADDR)) = SRC
#ifdef _MSC_VER
#define LOAD_32BE(DEST, ADDR, ARR) DEST = _byteswap_ulong(((uint32_t*) ARR)[(ADDR) >> 2])
#define LOAD_64BE(DEST, ADDR, ARR) DEST = _byteswap_uint64(*(uint64_t*) ((uintptr_t) (ARR) + (size_t) (ADDR)))
#define LOAD_32BE(DEST, ADDR, ARR) DEST = _byteswap_ulong(*(uint32_t*) ((uintptr_t) (ARR) + (size_t) (ADDR)))
#define LOAD_16BE(DEST, ADDR, ARR) DEST = _byteswap_ushort(*(uint16_t*) ((uintptr_t) (ARR) + (size_t) (ADDR)))
#define STORE_64BE(SRC, ADDR, ARR) *(uint64_t*) ((uintptr_t) (ARR) + (size_t) (ADDR)) = _byteswap_uint64(SRC)
#define STORE_32BE(SRC, ADDR, ARR) *(uint32_t*) ((uintptr_t) (ARR) + (size_t) (ADDR)) = _byteswap_ulong(SRC)
#define STORE_16BE(SRC, ADDR, ARR) *(uint16_t*) ((uintptr_t) (ARR) + (size_t) (ADDR)) = _byteswap_ushort(SRC)
#else
#define LOAD_32BE(DEST, ADDR, ARR) DEST = __builtin_bswap32(((uint32_t*) ARR)[(ADDR) >> 2])
#define LOAD_64BE(DEST, ADDR, ARR) DEST = __builtin_bswap64(*(uint64_t*) ((uintptr_t) (ARR) + (size_t) (ADDR)))
#define LOAD_32BE(DEST, ADDR, ARR) DEST = __builtin_bswap32(*(uint32_t*) ((uintptr_t) (ARR) + (size_t) (ADDR)))
#define LOAD_16BE(DEST, ADDR, ARR) DEST = __builtin_bswap16(*(uint16_t*) ((uintptr_t) (ARR) + (size_t) (ADDR)))
#define STORE_64BE(SRC, ADDR, ARR) *(uint64_t*) ((uintptr_t) (ARR) + (size_t) (ADDR)) = __builtin_bswap64(SRC)
#define STORE_32BE(SRC, ADDR, ARR) *(uint32_t*) ((uintptr_t) (ARR) + (size_t) (ADDR)) = __builtin_bswap32(SRC)
#define STORE_16BE(SRC, ADDR, ARR) *(uint16_t*) ((uintptr_t) (ARR) + (size_t) (ADDR)) = __builtin_bswap16(SRC)
#endif
#endif

4
src/debugger/gdb-stub.c
View File

@ -362,11 +362,7 @@ static void _writeRegister(struct GDBStub* stub, const char* message) {
uint32_t value = _readHex(readAddress, &i);
#ifdef _MSC_VER
value = _byteswap_ulong(value);
#else
LOAD_32BE(value, 0, &value);
#endif
if (reg <= ARM_PC) {
cpu->gprs[reg] = value;