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Unwind: define more interfaces more often 

These are also part of the Unwind interfaces.  However, their implementation is
different in EHABI vs frame tables based exception handling.  Always provide a
definition.  This partially undoes a movement change from earlier to make the
handling a bit simpler rather than grouping the two implementations together.

llvm-svn: 231690
This commit is contained in:
Saleem Abdulrasool 2015-03-09 19:35:12 +00:00
parent d46aeffc54
commit 762ff68a95
1 changed files with 36 additions and 40 deletions
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76
libcxxabi/src/Unwind/UnwindLevel1.c
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@ -23,7 +23,7 @@
#include "unwind.h"
#include "config.h"
#if _LIBUNWIND_BUILD_ZERO_COST_APIS && !LIBCXXABI_ARM_EHABI
#if !LIBCXXABI_ARM_EHABI
static _Unwind_Reason_Code
unwind_phase1(unw_context_t *uc, _Unwind_Exception *exception_object) {
@ -454,44 +454,6 @@ _Unwind_DeleteException(_Unwind_Exception *exception_object) {
exception_object);
}
#endif // _LIBUNWIND_BUILD_ZERO_COST_APIS && !LIBCXXABI_ARM_EHABI
#if LIBCXXABI_ARM_EHABI
_LIBUNWIND_EXPORT uintptr_t
_Unwind_GetGR(struct _Unwind_Context *context, int index) {
uintptr_t value = 0;
_Unwind_VRS_Get(context, _UVRSC_CORE, (uint32_t)index, _UVRSD_UINT32, &value);
_LIBUNWIND_TRACE_API("_Unwind_GetGR(context=%p, reg=%d) => 0x%" PRIx64 "\n",
(void *)context, index, (uint64_t)value);
return value;
}
_LIBUNWIND_EXPORT void _Unwind_SetGR(struct _Unwind_Context *context, int index,
uintptr_t value) {
_LIBUNWIND_TRACE_API("_Unwind_SetGR(context=%p, reg=%d, value=0x%0"PRIx64")\n",
(void *)context, index, (uint64_t)value);
_Unwind_VRS_Set(context, _UVRSC_CORE, (uint32_t)index, _UVRSD_UINT32, &value);
}
_LIBUNWIND_EXPORT uintptr_t _Unwind_GetIP(struct _Unwind_Context *context) {
// remove the thumb-bit before returning
uintptr_t value = _Unwind_GetGR(context, 15) & (~(uintptr_t)0x1);
_LIBUNWIND_TRACE_API("_Unwind_GetIP(context=%p) => 0x%" PRIx64 "\n",
(void *)context, (uint64_t)value);
return value;
}
_LIBUNWIND_EXPORT void _Unwind_SetIP(struct _Unwind_Context *context,
uintptr_t value) {
_LIBUNWIND_TRACE_API("_Unwind_SetIP(context=%p, value=0x%0" PRIx64 ")\n",
(void *)context, (uint64_t)value);
uintptr_t thumb_bit = _Unwind_GetGR(context, 15) & ((uintptr_t)0x1);
_Unwind_SetGR(context, 15, value | thumb_bit);
}
#else
/// Called by personality handler during phase 2 to get register values.
_LIBUNWIND_EXPORT uintptr_t
_Unwind_GetGR(struct _Unwind_Context *context, int index) {
@ -534,5 +496,39 @@ _LIBUNWIND_EXPORT void _Unwind_SetIP(struct _Unwind_Context *context,
unw_set_reg(cursor, UNW_REG_IP, value);
}
#endif
#else
_LIBUNWIND_EXPORT uintptr_t
_Unwind_GetGR(struct _Unwind_Context *context, int index) {
uintptr_t value = 0;
_Unwind_VRS_Get(context, _UVRSC_CORE, (uint32_t)index, _UVRSD_UINT32, &value);
_LIBUNWIND_TRACE_API("_Unwind_GetGR(context=%p, reg=%d) => 0x%" PRIx64 "\n",
(void *)context, index, (uint64_t)value);
return value;
}
_LIBUNWIND_EXPORT void _Unwind_SetGR(struct _Unwind_Context *context, int index,
uintptr_t value) {
_LIBUNWIND_TRACE_API("_Unwind_SetGR(context=%p, reg=%d, value=0x%0"PRIx64")\n",
(void *)context, index, (uint64_t)value);
_Unwind_VRS_Set(context, _UVRSC_CORE, (uint32_t)index, _UVRSD_UINT32, &value);
}
_LIBUNWIND_EXPORT uintptr_t _Unwind_GetIP(struct _Unwind_Context *context) {
// remove the thumb-bit before returning
uintptr_t value = _Unwind_GetGR(context, 15) & (~(uintptr_t)0x1);
_LIBUNWIND_TRACE_API("_Unwind_GetIP(context=%p) => 0x%" PRIx64 "\n",
(void *)context, (uint64_t)value);
return value;
}
_LIBUNWIND_EXPORT void _Unwind_SetIP(struct _Unwind_Context *context,
uintptr_t value) {
_LIBUNWIND_TRACE_API("_Unwind_SetIP(context=%p, value=0x%0" PRIx64 ")\n",
(void *)context, (uint64_t)value);
uintptr_t thumb_bit = _Unwind_GetGR(context, 15) & ((uintptr_t)0x1);
_Unwind_SetGR(context, 15, value | thumb_bit);
}
#endif // !LIBCXXABI_ARM_EHABI