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| author | John Baldwin <jhb@FreeBSD.org> | 2018-02-27 21:24:02 +0000 |
|---|---|---|
| committer | John Baldwin <jhb@FreeBSD.org> | 2018-02-27 21:24:02 +0000 |
| commit | 0594aee52fad70d2a0b44b321579b857b8cf9244 (patch) | |
| tree | 6f14b96634dacd317fc854d49c16e19c8ce7a905 /libunwind/src/libunwind.cpp | |
| parent | 5337efc69cdd59950faf0579043eb7aa8b9a3f2e (diff) | |
| download | bcm5719-llvm-0594aee52fad70d2a0b44b321579b857b8cf9244.tar.gz bcm5719-llvm-0594aee52fad70d2a0b44b321579b857b8cf9244.zip | |
[libunwind][MIPS]: Add support for unwinding in N32 processes.
Summary:
N32 uses the same register context as N64. However, N32 requires one
change to properly fetch addresses from registers stored in memory.
Since N32 is an ILP32 platform, getP() only fetches the first 32-bits
of a stored register. For a big-endian platform this fetches the
upper 32-bits which will be zero. To fix this, add a new
getRegister() method to AddressSpace which is responsible for
extracting the address stored in a register in memory. This matches
getP() for all current ABIs except for N32 where it reads the 64-bit
register and returns the low 32-bits as an address. The
DwarfInstructions::getSavedRegister() method uses
AddressSpace::getRegister() instead of AddressSpace::getP().
Reviewers: sdardis, compnerd
Reviewed By: sdardis
Differential Revision: https://reviews.llvm.org/D39074
llvm-svn: 326250
Diffstat (limited to 'libunwind/src/libunwind.cpp')
| -rw-r--r-- | libunwind/src/libunwind.cpp | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/libunwind/src/libunwind.cpp b/libunwind/src/libunwind.cpp index 4079de38847..c7318fb7cce 100644 --- a/libunwind/src/libunwind.cpp +++ b/libunwind/src/libunwind.cpp @@ -61,9 +61,10 @@ _LIBUNWIND_EXPORT int unw_init_local(unw_cursor_t *cursor, # define REGISTER_KIND Registers_arm #elif defined(__or1k__) # define REGISTER_KIND Registers_or1k -#elif defined(__mips__) && defined(_ABIO32) && defined(__mips_soft_float) +#elif defined(__mips__) && defined(_ABIO32) && _MIPS_SIM == _ABIO32 && \ + defined(__mips_soft_float) # define REGISTER_KIND Registers_mips_o32 -#elif defined(__mips__) && defined(_ABI64) && defined(__mips_soft_float) +#elif defined(__mips64) && defined(__mips_soft_float) # define REGISTER_KIND Registers_mips_newabi #elif defined(__mips__) # warning The MIPS architecture is not supported with this ABI and environment! |
