13842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz/* libunwind - a platform-independent unwind library 23842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz Copyright (C) 2008 CodeSourcery 33842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz 43842dac7333e42aa44531eda34ba55200b99ccf8Daniel JacobowitzThis file is part of libunwind. 53842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz 63842dac7333e42aa44531eda34ba55200b99ccf8Daniel JacobowitzPermission is hereby granted, free of charge, to any person obtaining 73842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitza copy of this software and associated documentation files (the 83842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz"Software"), to deal in the Software without restriction, including 93842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitzwithout limitation the rights to use, copy, modify, merge, publish, 103842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitzdistribute, sublicense, and/or sell copies of the Software, and to 113842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitzpermit persons to whom the Software is furnished to do so, subject to 123842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitzthe following conditions: 133842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz 143842dac7333e42aa44531eda34ba55200b99ccf8Daniel JacobowitzThe above copyright notice and this permission notice shall be 153842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitzincluded in all copies or substantial portions of the Software. 163842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz 173842dac7333e42aa44531eda34ba55200b99ccf8Daniel JacobowitzTHE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 183842dac7333e42aa44531eda34ba55200b99ccf8Daniel JacobowitzEXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 193842dac7333e42aa44531eda34ba55200b99ccf8Daniel JacobowitzMERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 203842dac7333e42aa44531eda34ba55200b99ccf8Daniel JacobowitzNONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 213842dac7333e42aa44531eda34ba55200b99ccf8Daniel JacobowitzLIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 223842dac7333e42aa44531eda34ba55200b99ccf8Daniel JacobowitzOF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 233842dac7333e42aa44531eda34ba55200b99ccf8Daniel JacobowitzWITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ 243842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz 253842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz#include "offsets.h" 263842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz 273842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz .text 283842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz .arm 293842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz 303842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz .global _Uarm_getcontext 313842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz .type _Uarm_getcontext, %function 323842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz @ This is a stub version of getcontext() for ARM which only stores core 333842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz @ registers. It must be called in a special way, not as a regular 343842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz @ function -- see also the libunwind-arm.h:unw_tdep_getcontext macro. 353842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz_Uarm_getcontext: 363842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz stmfd sp!, {r0, r1} 373842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz @ store r0 383842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz str r0, [r0, #LINUX_UC_MCONTEXT_OFF + LINUX_SC_R0_OFF] 393842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz add r0, r0, #LINUX_UC_MCONTEXT_OFF + LINUX_SC_R0_OFF 403842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz @ store r1 to r12 413842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz stmib r0, {r1-r12} 423842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz @ reconstruct r13 at call site, then store 433842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz add r1, sp, #12 443842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz str r1, [r0, #13 * 4] 453842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz @ retrieve r14 from call site, then store 463842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz ldr r1, [sp, #8] 473842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz str r1, [r0, #14 * 4] 483842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz @ point lr to instruction after call site's stack adjustment 493842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz add r1, lr, #4 503842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz str r1, [r0, #15 * 4] 513842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz ldmfd sp!, {r0, r1} 523842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz bx lr 5300aed9631b112d7aa7adc98054b62549cfc857daArun Sharma#ifdef __linux__ 5400aed9631b112d7aa7adc98054b62549cfc857daArun Sharma /* We do not need executable stack. */ 5500aed9631b112d7aa7adc98054b62549cfc857daArun Sharma .section .note.GNU-stack,"",%progbits 5600aed9631b112d7aa7adc98054b62549cfc857daArun Sharma#endif 57