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llvm-libunwind: use conventional (non-Darwin) X86 register numbers

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For historical reasons Darwin/i386 has ebp and esp swapped in the
eh_frame register numbering.  That is:

             Darwin      Other
    Reg #    eh_frame    eh_frame    DWARF
    =====    ========    ========    =====
      4        ebp         esp        esp
      5        esp         ebp        ebp

Although the UNW_X86_* constants are not supposed to be coupled to
DWARF / eh_frame numbering they are currently conflated in LLVM
libunwind, and thus we require the non-Darwin numbering.

MFC after:	3 days
Sponsored by:	The FreeBSD Foundation
This commit is contained in:
emaste 2016-07-19 00:47:00 +00:00
parent 8222001d47
commit f9f6c123cd
1 changed files with 2 additions and 2 deletions
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4
contrib/llvm/projects/libunwind/include/libunwind.h
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@ -151,8 +151,8 @@ enum {
UNW_X86_ECX = 1,
UNW_X86_EDX = 2,
UNW_X86_EBX = 3,
UNW_X86_EBP = 4,
UNW_X86_ESP = 5,
UNW_X86_ESP = 4,
UNW_X86_EBP = 5,
UNW_X86_ESI = 6,
UNW_X86_EDI = 7
};