/* Target-dependent code for the IA-64 for GDB, the GNU debugger.
- Copyright 2000
+
+ Copyright (C) 2000, 2004, 2005, 2007, 2008, 2009
Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
+#include "ia64-tdep.h"
+#include "arch-utils.h"
+#include "gdbcore.h"
+#include "regcache.h"
+#include "osabi.h"
+#include "solib-svr4.h"
+#include "symtab.h"
/* The sigtramp code is in a non-readable (executable-only) region
of memory called the ``gate page''. The addresses in question
overly generous to allow for different pages sizes. */
#define GATE_AREA_START 0xa000000000000100LL
-#define GATE_AREA_END 0xa000000000010000LL
+#define GATE_AREA_END 0xa000000000020000LL
/* Offset to sigcontext structure from frame of handler */
-#define IA64_LINUX_SIGCONTEXT_OFFSET 160
+#define IA64_LINUX_SIGCONTEXT_OFFSET 192
-int
-ia64_linux_in_sigtramp (CORE_ADDR pc, char *func_name)
+static int
+ia64_linux_pc_in_sigtramp (CORE_ADDR pc)
{
return (pc >= (CORE_ADDR) GATE_AREA_START && pc < (CORE_ADDR) GATE_AREA_END);
}
found. 0 is returned for registers which aren't stored in the the
sigcontext structure. */
-CORE_ADDR
+static CORE_ADDR
ia64_linux_sigcontext_register_address (CORE_ADDR sp, int regno)
{
+ char buf[8];
+ CORE_ADDR sigcontext_addr = 0;
+
+ /* The address of the sigcontext area is found at offset 16 in the sigframe. */
+ read_memory (sp + 16, buf, 8);
+ sigcontext_addr = extract_unsigned_integer (buf, 8);
+
if (IA64_GR0_REGNUM <= regno && regno <= IA64_GR31_REGNUM)
- return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 200 + 8 * (regno - IA64_GR0_REGNUM);
+ return sigcontext_addr + 200 + 8 * (regno - IA64_GR0_REGNUM);
else if (IA64_BR0_REGNUM <= regno && regno <= IA64_BR7_REGNUM)
- return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 136 + 8 * (regno - IA64_BR0_REGNUM);
+ return sigcontext_addr + 136 + 8 * (regno - IA64_BR0_REGNUM);
else if (IA64_FR0_REGNUM <= regno && regno <= IA64_FR127_REGNUM)
- return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 464 + 16 * (regno - IA64_FR0_REGNUM);
+ return sigcontext_addr + 464 + 16 * (regno - IA64_FR0_REGNUM);
else
switch (regno)
{
case IA64_IP_REGNUM :
- return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 40;
+ return sigcontext_addr + 40;
case IA64_CFM_REGNUM :
- return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 48;
+ return sigcontext_addr + 48;
case IA64_PSR_REGNUM :
- return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 56; /* user mask only */
+ return sigcontext_addr + 56; /* user mask only */
/* sc_ar_rsc is provided, from which we could compute bspstore, but
I don't think it's worth it. Anyway, if we want it, it's at offset
64 */
case IA64_BSP_REGNUM :
- return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 72;
+ return sigcontext_addr + 72;
case IA64_RNAT_REGNUM :
- return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 80;
+ return sigcontext_addr + 80;
case IA64_CCV_REGNUM :
- return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 88;
+ return sigcontext_addr + 88;
case IA64_UNAT_REGNUM :
- return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 96;
+ return sigcontext_addr + 96;
case IA64_FPSR_REGNUM :
- return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 104;
+ return sigcontext_addr + 104;
case IA64_PFS_REGNUM :
- return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 112;
+ return sigcontext_addr + 112;
case IA64_LC_REGNUM :
- return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 120;
+ return sigcontext_addr + 120;
case IA64_PR_REGNUM :
- return sp + IA64_LINUX_SIGCONTEXT_OFFSET + 128;
+ return sigcontext_addr + 128;
default :
return 0;
}
}
+
+static void
+ia64_linux_write_pc (struct regcache *regcache, CORE_ADDR pc)
+{
+ ia64_write_pc (regcache, pc);
+
+ /* We must be careful with modifying the instruction-pointer: if we
+ just interrupt a system call, the kernel would ordinarily try to
+ restart it when we resume the inferior, which typically results
+ in SIGSEGV or SIGILL. We prevent this by clearing r10, which
+ will tell the kernel that r8 does NOT contain a valid error code
+ and hence it will skip system-call restart.
+
+ The clearing of r10 is safe as long as ia64_write_pc() is only
+ called as part of setting up an inferior call. */
+ regcache_cooked_write_unsigned (regcache, IA64_GR10_REGNUM, 0);
+}
+
+static void
+ia64_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ /* Set the method of obtaining the sigcontext addresses at which
+ registers are saved. */
+ tdep->sigcontext_register_address = ia64_linux_sigcontext_register_address;
+
+ /* Set the pc_in_sigtramp method. */
+ tdep->pc_in_sigtramp = ia64_linux_pc_in_sigtramp;
+
+ set_gdbarch_write_pc (gdbarch, ia64_linux_write_pc);
+
+ set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
+
+ set_solib_svr4_fetch_link_map_offsets
+ (gdbarch, svr4_lp64_fetch_link_map_offsets);
+
+ /* Enable TLS support. */
+ set_gdbarch_fetch_tls_load_module_address (gdbarch,
+ svr4_fetch_objfile_link_map);
+}
+
+/* Provide a prototype to silence -Wmissing-prototypes. */
+extern initialize_file_ftype _initialize_ia64_linux_tdep;
+
+void
+_initialize_ia64_linux_tdep (void)
+{
+ gdbarch_register_osabi (bfd_arch_ia64, 0, GDB_OSABI_LINUX,
+ ia64_linux_init_abi);
+}
projects / deliverable / binutils-gdb.git / blobdiff