diff options
Diffstat (limited to 'src/third_party/unwind/dist/src/aarch64/getcontext.S')
| -rw-r--r-- | src/third_party/unwind/dist/src/aarch64/getcontext.S | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/src/third_party/unwind/dist/src/aarch64/getcontext.S b/src/third_party/unwind/dist/src/aarch64/getcontext.S new file mode 100644 index 00000000000..25ed5b66be7 --- /dev/null +++ b/src/third_party/unwind/dist/src/aarch64/getcontext.S @@ -0,0 +1,52 @@ +/* libunwind - a platform-independent unwind library + Copyright (C) 2008 Google, Inc + Contributed by Paul Pluzhnikov <ppluzhnikov@google.com> + Copyright (C) 2010 Konstantin Belousov <kib@freebsd.org> + +This file is part of libunwind. + +Permission is hereby granted, free of charge, to any person obtaining +a copy of this software and associated documentation files (the +"Software"), to deal in the Software without restriction, including +without limitation the rights to use, copy, modify, merge, publish, +distribute, sublicense, and/or sell copies of the Software, and to +permit persons to whom the Software is furnished to do so, subject to +the following conditions: + +The above copyright notice and this permission notice shall be +included in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE +LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION +WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ + +#include "offsets.h" + +/* int _Uaarch64_getcontext_trace (unw_tdep_context_t *ucp) + + Saves limited machine context in UCP necessary for fast trace. If fast trace + fails, caller will have to get the full context. +*/ + + .global _Uaarch64_getcontext_trace + .hidden _Uaarch64_getcontext_trace + .type _Uaarch64_getcontext_trace, @function +_Uaarch64_getcontext_trace: + .cfi_startproc + + /* Save only FP, SP, PC - exclude this call. */ + str x29, [x0, #(LINUX_UC_MCONTEXT_OFF + LINUX_SC_X29_OFF)] + mov x9, sp + str x9, [x0, #(LINUX_UC_MCONTEXT_OFF + LINUX_SC_SP_OFF)] + str x30, [x0, #(LINUX_UC_MCONTEXT_OFF + LINUX_SC_PC_OFF)] + + ret + .cfi_endproc + .size _Uaarch64_getcontext_trace, . - _Uaarch64_getcontext_trace + + /* We do not need executable stack. */ + .section .note.GNU-stack,"",@progbits |