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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 : 0 : 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 : 0 : 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 : : }