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x86: Add limited support for extracting function call arguments

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Add support for extracting the first 6 64-bit integer argumements to a
function call in X86ISA::getArgument().
This commit is contained in:
Andreas Sandberg 2013-09-30 09:37:17 +02:00
parent 30841926a3
commit 3af2d8eab0
1 changed files with 19 additions and 2 deletions
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21
src/arch/x86/utility.cc
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@ -51,8 +51,25 @@ namespace X86ISA {
uint64_t uint64_t
getArgument(ThreadContext *tc, int &number, uint16_t size, bool fp) getArgument(ThreadContext *tc, int &number, uint16_t size, bool fp)
{ {
panic("getArgument() not implemented for x86!\n"); if (!FullSystem) {
M5_DUMMY_RETURN panic("getArgument() only implemented for full system mode.\n");
} else if (fp) {
panic("getArgument(): Floating point arguments not implemented\n");
} else if (size != 8) {
panic("getArgument(): Can only handle 64-bit arguments.\n");
}
// The first 6 integer arguments are passed in registers, the rest
// are passed on the stack.
const int int_reg_map[] = {
INTREG_RDI, INTREG_RSI, INTREG_RDX,
INTREG_RCX, INTREG_R8, INTREG_R9
};
if (number < sizeof(int_reg_map) / sizeof(*int_reg_map)) {
return tc->readIntReg(int_reg_map[number]);
} else {
panic("getArgument(): Don't know how to handle stack arguments.\n");
}
} }
void initCPU(ThreadContext *tc, int cpuId) void initCPU(ThreadContext *tc, int cpuId)