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93 lines
2.6 KiB
93 lines
2.6 KiB
/* Fetch live process registers from TID.
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Copyright (C) 2013, 2014 Red Hat, Inc.
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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(__aarch64__) && defined(__linux__)
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# include <linux/uio.h>
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# include <sys/user.h>
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# include <sys/ptrace.h>
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/* Deal with old glibc defining user_pt_regs instead of user_regs_struct. */
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# ifndef HAVE_SYS_USER_REGS
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# define user_regs_struct user_pt_regs
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# define user_fpsimd_struct user_fpsimd_state
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# endif
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#endif
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#define BACKEND aarch64_
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#include "libebl_CPU.h"
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bool
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aarch64_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(__aarch64__) || !defined(__linux__)
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return false;
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#else /* __aarch64__ */
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/* General registers. */
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struct user_regs_struct 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..X30 plus SP. */
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if (! setfunc (0, 32, (Dwarf_Word *) &gregs.regs[0], arg))
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return false;
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/* PC. */
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if (! setfunc (-1, 1, (Dwarf_Word *) &gregs.pc, arg))
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return false;
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/* ELR cannot be found. */
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/* FP registers (only 64bits are used). */
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struct user_fpsimd_struct fregs;
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iovec.iov_base = &fregs;
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iovec.iov_len = sizeof (fregs);
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if (ptrace (PTRACE_GETREGSET, tid, NT_FPREGSET, &iovec) != 0)
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return false;
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Dwarf_Word dwarf_fregs[32];
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for (int r = 0; r < 32; r++)
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dwarf_fregs[r] = fregs.vregs[r] & 0xFFFFFFFF;
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if (! setfunc (64, 32, dwarf_fregs, arg))
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return false;
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return true;
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#endif /* __aarch64__ */
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}
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