mirror of
https://github.com/JakeHillion/drgn.git
synced 2024-12-23 17:53:07 +00:00
1cedca8ff4
Based on: c950e8a9 config: Fix spec file, add manpages and new GFDL license. With the following patches: configure: Add --disable-programs configure: Add --disable-shared configure: Fix -D_FORTIFY_SOURCE=2 check when CFLAGS contains -Wno-error libcpu: compile i386_lex.c with -Wno-implicit-fallthrough The plan is to stop relying on the distribution's version of elfutils and instead ship our own. This gives us freedom to assume that we're using the latest version and even ship our own patches (starting with a few build system improvements). More details are in scripts/update-elfutils.sh, which was used to generate this commit.
93 lines
2.6 KiB
C
93 lines
2.6 KiB
C
/* Fetch live process registers from TID.
|
|
Copyright (C) 2013, 2014 Red Hat, Inc.
|
|
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(__aarch64__) && defined(__linux__)
|
|
# include <linux/uio.h>
|
|
# include <sys/user.h>
|
|
# include <sys/ptrace.h>
|
|
/* Deal with old glibc defining user_pt_regs instead of user_regs_struct. */
|
|
# ifndef HAVE_SYS_USER_REGS
|
|
# define user_regs_struct user_pt_regs
|
|
# define user_fpsimd_struct user_fpsimd_state
|
|
# endif
|
|
#endif
|
|
|
|
#define BACKEND aarch64_
|
|
#include "libebl_CPU.h"
|
|
|
|
bool
|
|
aarch64_set_initial_registers_tid (pid_t tid __attribute__ ((unused)),
|
|
ebl_tid_registers_t *setfunc __attribute__ ((unused)),
|
|
void *arg __attribute__ ((unused)))
|
|
{
|
|
#if !defined(__aarch64__) || !defined(__linux__)
|
|
return false;
|
|
#else /* __aarch64__ */
|
|
|
|
/* General registers. */
|
|
struct user_regs_struct 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..X30 plus SP. */
|
|
if (! setfunc (0, 32, (Dwarf_Word *) &gregs.regs[0], arg))
|
|
return false;
|
|
|
|
/* PC. */
|
|
if (! setfunc (-1, 1, (Dwarf_Word *) &gregs.pc, arg))
|
|
return false;
|
|
|
|
/* ELR cannot be found. */
|
|
|
|
/* FP registers (only 64bits are used). */
|
|
struct user_fpsimd_struct fregs;
|
|
iovec.iov_base = &fregs;
|
|
iovec.iov_len = sizeof (fregs);
|
|
if (ptrace (PTRACE_GETREGSET, tid, NT_FPREGSET, &iovec) != 0)
|
|
return false;
|
|
|
|
Dwarf_Word dwarf_fregs[32];
|
|
for (int r = 0; r < 32; r++)
|
|
dwarf_fregs[r] = fregs.vregs[r] & 0xFFFFFFFF;
|
|
|
|
if (! setfunc (64, 32, dwarf_fregs, arg))
|
|
return false;
|
|
|
|
return true;
|
|
#endif /* __aarch64__ */
|
|
}
|