diff options
| -rw-r--r-- | src/arch/x86/utility.cc | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/src/arch/x86/utility.cc b/src/arch/x86/utility.cc index 7f5ae980a..41f5aee0b 100644 --- a/src/arch/x86/utility.cc +++ b/src/arch/x86/utility.cc @@ -51,8 +51,25 @@ namespace X86ISA { uint64_t getArgument(ThreadContext *tc, int &number, uint16_t size, bool fp) { - panic("getArgument() not implemented for x86!\n"); - M5_DUMMY_RETURN + if (!FullSystem) { + 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) |