1 /* Fetch live process registers from TID. 2 This file is part of elfutils. 3 4 This file is free software; you can redistribute it and/or modify 5 it under the terms of either 6 7 * the GNU Lesser General Public License as published by the Free 8 Software Foundation; either version 3 of the License, or (at 9 your option) any later version 10 11 or 12 13 * the GNU General Public License as published by the Free 14 Software Foundation; either version 2 of the License, or (at 15 your option) any later version 16 17 or both in parallel, as here. 18 19 elfutils is distributed in the hope that it will be useful, but 20 WITHOUT ANY WARRANTY; without even the implied warranty of 21 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 22 General Public License for more details. 23 24 You should have received copies of the GNU General Public License and 25 the GNU Lesser General Public License along with this program. If 26 not, see <http://www.gnu.org/licenses/>. */ 27 28 #ifdef HAVE_CONFIG_H 29 # include <config.h> 30 #endif 31 32 #include "system.h" 33 #include <assert.h> 34 #if defined __riscv && defined __linux__ 35 # include <sys/uio.h> 36 # include <sys/procfs.h> 37 # include <sys/ptrace.h> 38 #endif 39 40 #define BACKEND riscv_ 41 #include "libebl_CPU.h" 42 43 bool 44 riscv_set_initial_registers_tid (pid_t tid __attribute__ ((unused)), 45 ebl_tid_registers_t *setfunc __attribute__ ((unused)), 46 void *arg __attribute__ ((unused))) 47 { 48 #if !defined __riscv || !defined __linux__ 49 return false; 50 #else /* __riscv */ 51 52 /* General registers. */ 53 elf_gregset_t gregs; 54 struct iovec iovec; 55 iovec.iov_base = &gregs; 56 iovec.iov_len = sizeof (gregs); 57 if (ptrace (PTRACE_GETREGSET, tid, NT_PRSTATUS, &iovec) != 0) 58 return false; 59 60 /* X0 is constant 0. */ 61 Dwarf_Word zero = 0; 62 if (! setfunc (0, 1, &zero, arg)) 63 return false; 64 65 /* X1..X31. */ 66 if (! setfunc (1, 32, (Dwarf_Word *) &gregs[1], arg)) 67 return false; 68 69 /* PC. */ 70 if (! setfunc (-1, 1, (Dwarf_Word *) &gregs[0], arg)) 71 return false; 72 73 /* FP registers not yet supported. */ 74 75 return true; 76 #endif /* __riscv */ 77 } 78
