Gresume.c revision 1e10c2931d970d0ae5426bba6ba9e1c2998c7451
13842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz/* libunwind - a platform-independent unwind library 23842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz Copyright (C) 2008 CodeSourcery 31e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner Copyright 2011 Linaro Limited 43842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz 53842dac7333e42aa44531eda34ba55200b99ccf8Daniel JacobowitzThis file is part of libunwind. 63842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz 73842dac7333e42aa44531eda34ba55200b99ccf8Daniel JacobowitzPermission is hereby granted, free of charge, to any person obtaining 83842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitza copy of this software and associated documentation files (the 93842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz"Software"), to deal in the Software without restriction, including 103842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitzwithout limitation the rights to use, copy, modify, merge, publish, 113842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitzdistribute, sublicense, and/or sell copies of the Software, and to 123842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitzpermit persons to whom the Software is furnished to do so, subject to 133842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitzthe following conditions: 143842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz 153842dac7333e42aa44531eda34ba55200b99ccf8Daniel JacobowitzThe above copyright notice and this permission notice shall be 163842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitzincluded in all copies or substantial portions of the Software. 173842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz 183842dac7333e42aa44531eda34ba55200b99ccf8Daniel JacobowitzTHE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, 193842dac7333e42aa44531eda34ba55200b99ccf8Daniel JacobowitzEXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 203842dac7333e42aa44531eda34ba55200b99ccf8Daniel JacobowitzMERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND 213842dac7333e42aa44531eda34ba55200b99ccf8Daniel JacobowitzNONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE 223842dac7333e42aa44531eda34ba55200b99ccf8Daniel JacobowitzLIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION 233842dac7333e42aa44531eda34ba55200b99ccf8Daniel JacobowitzOF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION 243842dac7333e42aa44531eda34ba55200b99ccf8Daniel JacobowitzWITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ 253842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz 263842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz#include "unwind_i.h" 273842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz 283842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz#ifndef UNW_REMOTE_ONLY 293842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz 303842dac7333e42aa44531eda34ba55200b99ccf8Daniel JacobowitzHIDDEN inline int 313842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitzarm_local_resume (unw_addr_space_t as, unw_cursor_t *cursor, void *arg) 323842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz{ 331e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner#ifdef __linux__ 341e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner struct cursor *c = (struct cursor *) cursor; 351e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner ucontext_t *uc = c->dwarf.as_arg; 361e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner unsigned long regs[10]; 371e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner 381e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner /* Copy the register contents to be restored. */ 391e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner regs[0] = uc->uc_mcontext.arm_r4; 401e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner regs[1] = uc->uc_mcontext.arm_r5; 411e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner regs[2] = uc->uc_mcontext.arm_r6; 421e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner regs[3] = uc->uc_mcontext.arm_r7; 431e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner regs[4] = uc->uc_mcontext.arm_r8; 441e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner regs[5] = uc->uc_mcontext.arm_r9; 451e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner regs[6] = uc->uc_mcontext.arm_r10; 461e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner regs[7] = uc->uc_mcontext.arm_fp; 471e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner regs[8] = uc->uc_mcontext.arm_sp; 481e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner regs[9] = uc->uc_mcontext.arm_lr; 491e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner 501e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner /* Restore the registers. */ 511e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner asm __volatile__ ( 521e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner "ldmia %0, {r4-r12, lr}\n" 531e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner "mov sp, r12\n" 541e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner "bx lr\n" 551e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner : : "r" (regs) : 561e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner ); 571e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner#else 581e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner printf ("%s: implement me\n", __FUNCTION__); 591e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner#endif 603842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz return -UNW_EINVAL; 613842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz} 623842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz 633842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz#endif /* !UNW_REMOTE_ONLY */ 643842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz 651e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Wernerstatic inline void 661e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Wernerestablish_machine_state (struct cursor *c) 671e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner{ 681e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner unw_addr_space_t as = c->dwarf.as; 691e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner void *arg = c->dwarf.as_arg; 701e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner unw_fpreg_t fpval; 711e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner unw_word_t val; 721e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner int reg; 731e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner 741e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner Debug (8, "copying out cursor state\n"); 751e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner 761e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner for (reg = 0; reg <= UNW_REG_LAST; ++reg) 771e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner { 781e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner Debug (16, "copying %s %d\n", unw_regname (reg), reg); 791e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner if (unw_is_fpreg (reg)) 801e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner { 811e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner if (tdep_access_fpreg (c, reg, &fpval, 0) >= 0) 821e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner as->acc.access_fpreg (as, reg, &fpval, 1, arg); 831e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner } 841e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner else 851e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner { 861e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner if (tdep_access_reg (c, reg, &val, 0) >= 0) 871e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner as->acc.access_reg (as, reg, &val, 1, arg); 881e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner } 891e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner } 901e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner} 911e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner 923842dac7333e42aa44531eda34ba55200b99ccf8Daniel JacobowitzPROTECTED int 933842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitzunw_resume (unw_cursor_t *cursor) 943842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz{ 951e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner struct cursor *c = (struct cursor *) cursor; 961e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner 971e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner Debug (1, "(cursor=%p)\n", c); 981e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner 991e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner if (!c->dwarf.ip) 1001e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner { 1011e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner /* This can happen easily when the frame-chain gets truncated 1021e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner due to bad or missing unwind-info. */ 1031e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner Debug (1, "refusing to resume execution at address 0\n"); 1041e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner return -UNW_EINVAL; 1051e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner } 1061e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner 1071e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner establish_machine_state (c); 1081e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner 1091e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner return (*c->dwarf.as->acc.resume) (c->dwarf.as, (unw_cursor_t *) c, 1101e10c2931d970d0ae5426bba6ba9e1c2998c7451Ken Werner c->dwarf.as_arg); 1113842dac7333e42aa44531eda34ba55200b99ccf8Daniel Jacobowitz} 112