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