1 /* Fetch live process registers from TID. 2 Copyright (C) 2013, 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 #include "system.h" 34 #include <assert.h> 35 #ifdef __aarch64__ 36 # include <linux/uio.h> 37 # include <sys/user.h> 38 # include <sys/ptrace.h> 39 /* Deal with old glibc defining user_pt_regs instead of user_regs_struct. */ 40 # ifndef HAVE_SYS_USER_REGS 41 # define user_regs_struct user_pt_regs 42 # define user_fpsimd_struct user_fpsimd_state 43 # endif 44 #endif 45 46 #define BACKEND aarch64_ 47 #include "libebl_CPU.h" 48 49 bool 50 aarch64_set_initial_registers_tid (pid_t tid __attribute__ ((unused)), 51 ebl_tid_registers_t *setfunc __attribute__ ((unused)), 52 void *arg __attribute__ ((unused))) 53 { 54 #ifndef __aarch64__ 55 return false; 56 #else /* __aarch64__ */ 57 58 /* General registers. */ 59 struct user_regs_struct gregs; 60 struct iovec iovec; 61 iovec.iov_base = &gregs; 62 iovec.iov_len = sizeof (gregs); 63 if (ptrace (PTRACE_GETREGSET, tid, NT_PRSTATUS, &iovec) != 0) 64 return false; 65 66 /* X0..X30 plus SP. */ 67 if (! setfunc (0, 32, (Dwarf_Word *) &gregs.regs[0], arg)) 68 return false; 69 70 /* PC. */ 71 if (! setfunc (-1, 1, (Dwarf_Word *) &gregs.pc, arg)) 72 return false; 73 74 /* ELR cannot be found. */ 75 76 /* FP registers (only 64bits are used). */ 77 struct user_fpsimd_struct fregs; 78 iovec.iov_base = &fregs; 79 iovec.iov_len = sizeof (fregs); 80 if (ptrace (PTRACE_GETREGSET, tid, NT_FPREGSET, &iovec) != 0) 81 return false; 82 83 Dwarf_Word dwarf_fregs[32]; 84 for (int r = 0; r < 32; r++) 85 dwarf_fregs[r] = fregs.vregs[r] & 0xFFFFFFFF; 86 87 if (! setfunc (64, 32, dwarf_fregs, arg)) 88 return false; 89 90 return true; 91 #endif /* __aarch64__ */ 92 } 93
