kmemcheck: move 64-bit ifdef out of kmemcheck_opcode_decode()
This patch moves the CONFIG_X86_64 ifdef out of kmemcheck_opcode_decode() by introducing a version of the function that always returns false for CONFIG_X86_32. Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com>
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@ -16,10 +16,17 @@ static bool opcode_is_prefix(uint8_t b)
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|| b == 0x67;
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}
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#ifdef CONFIG_X86_64
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static bool opcode_is_rex_prefix(uint8_t b)
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{
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return (b & 0xf0) == 0x40;
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}
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#else
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static bool opcode_is_rex_prefix(uint8_t b)
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{
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return false;
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}
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#endif
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#define REX_W (1 << 3)
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@ -40,7 +47,6 @@ void kmemcheck_opcode_decode(const uint8_t *op, unsigned int *size)
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operand_size_override = 2;
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}
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#ifdef CONFIG_X86_64
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/* REX prefix */
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if (opcode_is_rex_prefix(*op)) {
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uint8_t rex = *op;
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@ -72,7 +78,6 @@ void kmemcheck_opcode_decode(const uint8_t *op, unsigned int *size)
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return;
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}
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}
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#endif
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/* escape opcode */
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if (*op == 0x0f) {
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