1 files changed, 92 insertions, 0 deletions
diff --git a/src/backends/arm_initreg.c b/src/backends/arm_initreg.c
new file mode 100644
index 00000000..a0a9be94
--- /dev/null
+++ b/src/backends/arm_initreg.c
@@ -0,0 +1,92 @@
+/* Fetch live process registers from TID.
+   Copyright (C) 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
+
+#if defined __arm__
+# include <sys/types.h>
+# include <sys/user.h>
+# include <sys/ptrace.h>
+#endif
+
+#ifdef __aarch64__
+# 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
+# endif
+#endif
+
+#define BACKEND arm_
+#include "libebl_CPU.h"
+
+bool
+arm_set_initial_registers_tid (pid_t tid __attribute__ ((unused)),
+			  ebl_tid_registers_t *setfunc __attribute__ ((unused)),
+			       void *arg __attribute__ ((unused)))
+{
+#if !defined __arm__ && !defined __aarch64__
+  return false;
+#else	/* __arm__ || __aarch64__ */
+#if defined __arm__
+  struct user_regs user_regs;
+  if (ptrace (PTRACE_GETREGS, tid, NULL, &user_regs) != 0)
+    return false;
+
+  Dwarf_Word dwarf_regs[16];
+  /* R0..R12 SP LR PC */
+  for (int i = 0; i < 16; i++)
+    dwarf_regs[i] = user_regs.uregs[i];
+
+  return setfunc (0, 16, dwarf_regs, arg);
+#elif defined __aarch64__
+  /* Compat mode: arm compatible code running on aarch64 */
+  int i;
+  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;
+
+  Dwarf_Word dwarf_regs[16];
+  /* R0..R12 SP LR PC, encoded as 32 bit quantities */
+  uint32_t *u32_ptr = (uint32_t *) &gregs.regs[0];
+  for (i = 0; i < 16; i++)
+    dwarf_regs[i] = u32_ptr[i];
+
+  return setfunc (0, 16, dwarf_regs, arg);
+#else
+# error "source file error, it cannot happen"
+#endif
+#endif
+}