| /* Fetch live process registers from TID. |
| This file is part of elfutils. |
| |
| This file is free software; you can redistribute it and/or modify |
| it under the terms of either |
| |
| * the GNU Lesser General Public License as published by the Free |
| Software Foundation; either version 3 of the License, or (at |
| your option) any later version |
| |
| or |
| |
| * the GNU General Public License as published by the Free |
| Software Foundation; either version 2 of the License, or (at |
| your option) any later version |
| |
| or both in parallel, as here. |
| |
| elfutils is distributed in the hope that it will be useful, but |
| WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| General Public License for more details. |
| |
| You should have received copies of the GNU General Public License and |
| the GNU Lesser General Public License along with this program. If |
| not, see <http://www.gnu.org/licenses/>. */ |
| |
| #ifdef HAVE_CONFIG_H |
| # include <config.h> |
| #endif |
| |
| #include "system.h" |
| #include <assert.h> |
| #if defined __riscv && defined __linux__ |
| # include <sys/uio.h> |
| # include <sys/procfs.h> |
| # include <sys/ptrace.h> |
| #endif |
| |
| #define BACKEND riscv_ |
| #include "libebl_CPU.h" |
| |
| bool |
| riscv_set_initial_registers_tid (pid_t tid __attribute__ ((unused)), |
| ebl_tid_registers_t *setfunc __attribute__ ((unused)), |
| void *arg __attribute__ ((unused))) |
| { |
| #if !defined __riscv || !defined __linux__ |
| return false; |
| #else /* __riscv */ |
| |
| /* General registers. */ |
| elf_gregset_t gregs; |
| struct iovec iovec; |
| iovec.iov_base = &gregs; |
| iovec.iov_len = sizeof (gregs); |
| if (ptrace (PTRACE_GETREGSET, tid, NT_PRSTATUS, &iovec) != 0) |
| return false; |
| |
| /* X0 is constant 0. */ |
| Dwarf_Word zero = 0; |
| if (! setfunc (0, 1, &zero, arg)) |
| return false; |
| |
| /* X1..X31. */ |
| if (! setfunc (1, 32, (Dwarf_Word *) &gregs[1], arg)) |
| return false; |
| |
| /* PC. */ |
| if (! setfunc (-1, 1, (Dwarf_Word *) &gregs[0], arg)) |
| return false; |
| |
| /* FP registers not yet supported. */ |
| |
| return true; |
| #endif /* __riscv */ |
| } |