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1 : : /* Fetch live process registers from TID. 2 : : Copyright (C) 2014 Red Hat, Inc. 3 : : This file is part of elfutils. 4 : : 5 : : This file is free software; you can redistribute it and/or modify 6 : : it under the terms of either 7 : : 8 : : * the GNU Lesser General Public License as published by the Free 9 : : Software Foundation; either version 3 of the License, or (at 10 : : your option) any later version 11 : : 12 : : or 13 : : 14 : : * the GNU General Public License as published by the Free 15 : : Software Foundation; either version 2 of the License, or (at 16 : : your option) any later version 17 : : 18 : : or both in parallel, as here. 19 : : 20 : : elfutils is distributed in the hope that it will be useful, but 21 : : WITHOUT ANY WARRANTY; without even the implied warranty of 22 : : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 23 : : General Public License for more details. 24 : : 25 : : You should have received copies of the GNU General Public License and 26 : : the GNU Lesser General Public License along with this program. If 27 : : not, see <http://www.gnu.org/licenses/>. */ 28 : : 29 : : #ifdef HAVE_CONFIG_H 30 : : # include <config.h> 31 : : #endif 32 : : 33 : : #ifdef __linux__ 34 : : #if defined __arm__ 35 : : # include <sys/types.h> 36 : : # include <sys/user.h> 37 : : # include <sys/ptrace.h> 38 : : #endif 39 : : 40 : : #ifdef __aarch64__ 41 : : # include <linux/uio.h> 42 : : # include <sys/user.h> 43 : : # include <sys/ptrace.h> 44 : : /* Deal with old glibc defining user_pt_regs instead of user_regs_struct. */ 45 : : # ifndef HAVE_SYS_USER_REGS 46 : : # define user_regs_struct user_pt_regs 47 : : # endif 48 : : #endif 49 : : #endif 50 : : 51 : : #define BACKEND arm_ 52 : : #include "libebl_CPU.h" 53 : : 54 : : bool 55 : 0 : arm_set_initial_registers_tid (pid_t tid __attribute__ ((unused)), 56 : : ebl_tid_registers_t *setfunc __attribute__ ((unused)), 57 : : void *arg __attribute__ ((unused))) 58 : : { 59 : : #if !defined(__linux__) || (!defined __arm__ && !defined __aarch64__) 60 : 0 : return false; 61 : : #else /* __arm__ || __aarch64__ */ 62 : : #if defined __arm__ 63 : : struct user_regs user_regs; 64 : : if (ptrace (PTRACE_GETREGS, tid, NULL, &user_regs) != 0) 65 : : return false; 66 : : 67 : : Dwarf_Word dwarf_regs[16]; 68 : : /* R0..R12 SP LR PC */ 69 : : for (int i = 0; i < 16; i++) 70 : : dwarf_regs[i] = user_regs.uregs[i]; 71 : : 72 : : return setfunc (0, 16, dwarf_regs, arg); 73 : : #elif defined __aarch64__ 74 : : /* Compat mode: arm compatible code running on aarch64 */ 75 : : int i; 76 : : struct user_regs_struct gregs; 77 : : struct iovec iovec; 78 : : iovec.iov_base = &gregs; 79 : : iovec.iov_len = sizeof (gregs); 80 : : if (ptrace (PTRACE_GETREGSET, tid, NT_PRSTATUS, &iovec) != 0) 81 : : return false; 82 : : 83 : : Dwarf_Word dwarf_regs[16]; 84 : : /* R0..R12 SP LR PC, encoded as 32 bit quantities */ 85 : : uint32_t *u32_ptr = (uint32_t *) &gregs.regs[0]; 86 : : for (i = 0; i < 16; i++) 87 : : dwarf_regs[i] = u32_ptr[i]; 88 : : 89 : : return setfunc (0, 16, dwarf_regs, arg); 90 : : #else 91 : : # error "source file error, it cannot happen" 92 : : #endif 93 : : #endif 94 : : }