//------------------------------------------------------------------------
// Compiler::unwindSetFrameRegCFI: Record a cfi info for a frame register set.
//
// Arguments:
// reg - The register being set as the frame register.
// offset - The offset from the current stack pointer that the frame pointer will point at.
//
void Compiler::unwindSetFrameRegCFI(regNumber reg, unsigned offset)
{
#if defined(_TARGET_ARM_)
assert(compGeneratingEpilog);
#else
assert(compGeneratingProlog);
#endif
FuncInfoDsc* func = funCurrentFunc();
unsigned int cbProlog = 0;
if (compGeneratingProlog)
{
cbProlog = unwindGetCurrentOffset(func);
noway_assert((BYTE)cbProlog == cbProlog);
}
createCfiCode(func, cbProlog, CFI_DEF_CFA_REGISTER, mapRegNumToDwarfReg(reg));
if (offset != 0)
{
// before: cfa = rsp + old_cfa_offset;
// rbp = rsp + offset;
// after: cfa should be based on rbp, but points to the old address:
// rsp + old_cfa_offset == rbp + old_cfa_offset + adjust;
// adjust = -offset;
int adjust = -(int)offset;
createCfiCode(func, cbProlog, CFI_ADJUST_CFA_OFFSET, DWARF_REG_ILLEGAL, adjust);
}
}
void Compiler::unwindPushPopCFI(regNumber reg)
{
#if defined(_TARGET_ARM_)
assert(compGeneratingEpilog);
#else
assert(compGeneratingProlog);
#endif
FuncInfoDsc* func = funCurrentFunc();
unsigned int cbProlog = 0;
if (compGeneratingProlog)
{
cbProlog = unwindGetCurrentOffset(func);
noway_assert((BYTE)cbProlog == cbProlog);
createCfiCode(func, cbProlog, CFI_ADJUST_CFA_OFFSET, DWARF_REG_ILLEGAL, REGSIZE_BYTES == 8 ? 8 : 4);
}
if ((RBM_CALLEE_SAVED & genRegMask(reg))
#if defined(UNIX_AMD64_ABI)
#if ETW_EBP_FRAMED
// In case of ETW_EBP_FRAMED defined the REG_FPBASE (RBP)
// is excluded from the callee-save register list.
// Make sure the register gets PUSH unwind info in this case,
// since it is pushed as a frame register.
|| (reg == REG_FPBASE)
#endif // ETW_EBP_FRAMED
#endif
)
{
createCfiCode(func, cbProlog, CFI_REL_OFFSET, mapRegNumToDwarfReg(reg));
}
}
void Compiler::unwindSetFrameRegCFI(regNumber reg, unsigned offset)
{
assert(compGeneratingProlog);
FuncInfoDsc* func = funCurrentFunc();
unsigned int cbProlog = unwindGetCurrentOffset(func);
noway_assert((BYTE)cbProlog == cbProlog);
createCfiCode(func, cbProlog, CFI_DEF_CFA_REGISTER, mapRegNumToDwarfReg(reg));
if (offset != 0)
{
createCfiCode(func, cbProlog, CFI_ADJUST_CFA_OFFSET, DWARF_REG_ILLEGAL, offset);
}
}
void Compiler::unwindAllocStackCFI(unsigned size)
{
assert(compGeneratingProlog);
FuncInfoDsc* func = funCurrentFunc();
unsigned int cbProlog = unwindGetCurrentOffset(func);
noway_assert((BYTE)cbProlog == cbProlog);
createCfiCode(func, cbProlog, CFI_ADJUST_CFA_OFFSET, DWARF_REG_ILLEGAL, size);
}
void Compiler::unwindSaveRegCFI(regNumber reg, unsigned offset)
{
assert(compGeneratingProlog);
if (RBM_CALLEE_SAVED & genRegMask(reg))
{
FuncInfoDsc* func = funCurrentFunc();
unsigned int cbProlog = unwindGetCurrentOffset(func);
noway_assert((BYTE)cbProlog == cbProlog);
createCfiCode(func, cbProlog, CFI_REL_OFFSET, mapRegNumToDwarfReg(reg), offset);
}
}
void Compiler::unwindAllocStackCFI(unsigned size)
{
#if defined(_TARGET_ARM_)
assert(compGeneratingEpilog);
#else
assert(compGeneratingProlog);
#endif
FuncInfoDsc* func = funCurrentFunc();
unsigned int cbProlog = 0;
if (compGeneratingProlog)
{
cbProlog = unwindGetCurrentOffset(func);
noway_assert((BYTE)cbProlog == cbProlog);
}
createCfiCode(func, cbProlog, CFI_ADJUST_CFA_OFFSET, DWARF_REG_ILLEGAL, size);
}
