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95 lines
2.6 KiB
95 lines
2.6 KiB
/* Fetch live process registers from TID.
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Copyright (C) 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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#ifdef __linux__
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#if defined __arm__
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# include <sys/types.h>
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# include <sys/user.h>
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# include <sys/ptrace.h>
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#endif
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#ifdef __aarch64__
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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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# endif
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#endif
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#endif
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#define BACKEND arm_
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#include "libebl_CPU.h"
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bool
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arm_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(__linux__) || (!defined __arm__ && !defined __aarch64__)
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return false;
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#else /* __arm__ || __aarch64__ */
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#if defined __arm__
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struct user_regs user_regs;
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if (ptrace (PTRACE_GETREGS, tid, NULL, &user_regs) != 0)
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return false;
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Dwarf_Word dwarf_regs[16];
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/* R0..R12 SP LR PC */
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for (int i = 0; i < 16; i++)
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dwarf_regs[i] = user_regs.uregs[i];
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return setfunc (0, 16, dwarf_regs, arg);
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#elif defined __aarch64__
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/* Compat mode: arm compatible code running on aarch64 */
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int i;
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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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Dwarf_Word dwarf_regs[16];
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/* R0..R12 SP LR PC, encoded as 32 bit quantities */
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uint32_t *u32_ptr = (uint32_t *) &gregs.regs[0];
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for (i = 0; i < 16; i++)
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dwarf_regs[i] = u32_ptr[i];
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return setfunc (0, 16, dwarf_regs, arg);
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#else
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# error "source file error, it cannot happen"
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#endif
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#endif
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}
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