88 lines
2.5 KiB
C
88 lines
2.5 KiB
C
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/* Fetch live process registers from TID. C-SKY version.
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Copyright (C) 2019 Hangzhou C-SKY Microsystems co.,ltd.
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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 __CSKY__ && 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 csky_
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#include "libebl_CPU.h"
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bool
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csky_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 __CSKY__ || !defined __linux__
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return false;
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#else /* __CSKY__ */
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struct pt_regs user_regs;
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struct iovec iovec;
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iovec.iov_base = &user_regs;
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iovec.iov_len = sizeof (user_regs);
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if (ptrace (PTRACE_GETREGSET, tid, NT_PRSTATUS, &iovec) != 0)
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return false;
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Dwarf_Word dwarf_regs[38];
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/* lr. */
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dwarf_regs[15] = user_regs.lr;
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/* sp. */
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dwarf_regs[14] = user_regs.usp;
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/* r0 ~ r13. */
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dwarf_regs[0] = user_regs.a0;
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dwarf_regs[1] = user_regs.a1;
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dwarf_regs[2] = user_regs.a2;
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dwarf_regs[3] = user_regs.a3;
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for (int i = 4; i < 14; i++)
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dwarf_regs[i] = user_regs.regs[i - 4];
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/* r ~ r13. */
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for (int i = 16; i < 31; i++)
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dwarf_regs[i] = user_regs.exregs[i - 16];
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/* tls. */
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dwarf_regs[31] = user_regs.tls;
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/* hi. */
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dwarf_regs[36] = user_regs.rhi;
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/* lo. */
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dwarf_regs[37] = user_regs.rlo;
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/* pc. */
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dwarf_regs[32] = user_regs.pc;
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setfunc (-1, 1, &dwarf_regs[32], arg);
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return setfunc (0, 38, dwarf_regs, arg);
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#endif
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}
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