Add ifdefs around ELF specific parts of UnwindRegisters*.S for arm

This allows using dwarf exceptions on MinGW/ARM.

Differential Revision: https://reviews.llvm.org/D39534

llvm-svn: 317423

libunwind/docs/index.rst

@@ -52,7 +52,7 @@ Linux        ARM                  Clang, GCC   EHABI
 Linux        i386, x86_64, ARM64  Clang, GCC   DWARF CFI
 Mac OS X     i386, x86_64         Clang, GCC   DWARF CFI
 NetBSD       x86_64               Clang, GCC   DWARF CFI
-Windows      i386, x86_64         Clang        DWARF CFI
+Windows      i386, x86_64, ARM    Clang        DWARF CFI
 ============ ==================== ============ ========================
 
 The following minimum compiler versions are strongly recommended.

libunwind/src/UnwindRegistersRestore.S

@@ -391,7 +391,9 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm20restoreCoreAndJu
 @  values pointer is in r0
 @
   .p2align 2
+#if defined(__ELF__)
   .fpu vfpv3-d16
+#endif
 DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm19restoreVFPWithFLDMDEPy)
   @ VFP and iwMMX instructions are only available when compiling with the flags
   @ that enable them. We do not want to do that in the library (because we do not
@@ -410,7 +412,9 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm19restoreVFPWithFL
 @  values pointer is in r0
 @
   .p2align 2
+#if defined(__ELF__)
   .fpu vfpv3-d16
+#endif
 DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm19restoreVFPWithFLDMXEPy)
   vldmia r0, {d0-d15} @ fldmiax is deprecated in ARMv7+ and now behaves like vldmia
   JMP(lr)
@@ -422,7 +426,9 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm19restoreVFPWithFL
 @  values pointer is in r0
 @
   .p2align 2
+#if defined(__ELF__)
   .fpu vfpv3
+#endif
 DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm12restoreVFPv3EPy)
   vldmia r0, {d16-d31}
   JMP(lr)
@@ -436,7 +442,9 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm12restoreVFPv3EPy)
 @  values pointer is in r0
 @
   .p2align 2
+#if defined(__ELF__)
   .arch armv5te
+#endif
 DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm12restoreiWMMXEPy)
   ldcl p1, cr0, [r0], #8  @ wldrd wR0, [r0], #8
   ldcl p1, cr1, [r0], #8  @ wldrd wR1, [r0], #8
@@ -463,7 +471,9 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm12restoreiWMMXEPy)
 @  values pointer is in r0
 @
   .p2align 2
+#if defined(__ELF__)
   .arch armv5te
+#endif
 DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm19restoreiWMMXControlEPj)
   ldc2 p1, cr8, [r0], #4  @ wldrw wCGR0, [r0], #4
   ldc2 p1, cr9, [r0], #4  @ wldrw wCGR1, [r0], #4

libunwind/src/UnwindRegistersSave.S

@@ -375,7 +375,9 @@ DEFINE_LIBUNWIND_FUNCTION(unw_getcontext)
 @  values pointer is in r0
 @
   .p2align 2
+#if defined(__ELF__)
   .fpu vfpv3-d16
+#endif
 DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm16saveVFPWithFSTMDEPy)
   vstmia r0, {d0-d15}
   JMP(lr)
@@ -387,7 +389,9 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm16saveVFPWithFSTMD
 @  values pointer is in r0
 @
   .p2align 2
+#if defined(__ELF__)
   .fpu vfpv3-d16
+#endif
 DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm16saveVFPWithFSTMXEPy)
   vstmia r0, {d0-d15} @ fstmiax is deprecated in ARMv7+ and now behaves like vstmia
   JMP(lr)
@@ -399,7 +403,9 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm16saveVFPWithFSTMX
 @  values pointer is in r0
 @
   .p2align 2
+#if defined(__ELF__)
   .fpu vfpv3
+#endif
 DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm9saveVFPv3EPy)
   @ VFP and iwMMX instructions are only available when compiling with the flags
   @ that enable them. We do not want to do that in the library (because we do not
@@ -420,7 +426,9 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm9saveVFPv3EPy)
 @  values pointer is in r0
 @
   .p2align 2
+#if defined(__ELF__)
   .arch armv5te
+#endif
 DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm9saveiWMMXEPy)
   stcl p1, cr0, [r0], #8  @ wstrd wR0, [r0], #8
   stcl p1, cr1, [r0], #8  @ wstrd wR1, [r0], #8
@@ -447,7 +455,9 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm9saveiWMMXEPy)
 @  values pointer is in r0
 @
   .p2align 2
+#if defined(__ELF__)
   .arch armv5te
+#endif
 DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm16saveiWMMXControlEPj)
   stc2 p1, cr8, [r0], #4  @ wstrw wCGR0, [r0], #4
   stc2 p1, cr9, [r0], #4  @ wstrw wCGR1, [r0], #4