/* Target-dependent code for the IA-64 for GDB, the GNU debugger.
- Copyright 2000
- Free Software Foundation, Inc.
+
+ Copyright (C) 2000, 2004, 2005, 2007 Free Software Foundation, Inc.
This file is part of GDB.
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. */
+ Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA. */
#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 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);
+
+ /* Enable TLS support. */
+ set_gdbarch_fetch_tls_load_module_address (gdbarch,
+ svr4_fetch_objfile_link_map);
+}
+
+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