1/* libunwind - a platform-independent unwind library 2 Copyright (C) 2008 Google, Inc 3 Contributed by Paul Pluzhnikov <ppluzhnikov@google.com> 4 Copyright (C) 2010 Konstantin Belousov <kib@freebsd.org> 5 6This file is part of libunwind. 7 8Permission is hereby granted, free of charge, to any person obtaining 9a copy of this software and associated documentation files (the 10"Software"), to deal in the Software without restriction, including 11without limitation the rights to use, copy, modify, merge, publish, 12distribute, sublicense, and/or sell copies of the Software, and to 13permit persons to whom the Software is furnished to do so, subject to 14the following conditions: 15 16The above copyright notice and this permission notice shall be 17included in all copies or substantial portions of the Software. 18 19THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 20EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 21MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 22NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 23LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 24OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 25WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ 26 27#include "offsets.h" 28 29/* int _Uaarch64_getcontext_trace (unw_tdep_context_t *ucp) 30 31 Saves limited machine context in UCP necessary for fast trace. If fast trace 32 fails, caller will have to get the full context. 33*/ 34 35 .global _Uaarch64_getcontext_trace 36 .hidden _Uaarch64_getcontext_trace 37 .type _Uaarch64_getcontext_trace, @function 38_Uaarch64_getcontext_trace: 39 .cfi_startproc 40 41 /* Save only FP, SP, PC - exclude this call. */ 42 str x29, [x0, #(LINUX_UC_MCONTEXT_OFF + LINUX_SC_X29_OFF)] 43 mov x9, sp 44 str x9, [x0, #(LINUX_UC_MCONTEXT_OFF + LINUX_SC_SP_OFF)] 45 str x30, [x0, #(LINUX_UC_MCONTEXT_OFF + LINUX_SC_PC_OFF)] 46 47 ret 48 .cfi_endproc 49 .size _Uaarch64_getcontext_trace, . - _Uaarch64_getcontext_trace 50 51 /* We do not need executable stack. */ 52 .section .note.GNU-stack,"",@progbits 53