/* Target-dependent code for the IA-64 for GDB, the GNU debugger.
- Copyright 2000
- Free Software Foundation, Inc.
+
+ Copyright 2000, 2004, 2005 Free Software Foundation, Inc.
This file is part of GDB.
Boston, MA 02111-1307, 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"
/* 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
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];
return 0;
}
}
+
+static void
+ia64_linux_write_pc (CORE_ADDR pc, ptid_t ptid)
+{
+ ia64_write_pc (pc, ptid);
+
+ /* 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. */
+ write_register_pid (IA64_GR10_REGNUM, 0, ptid);
+}
+
+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_gdbarch_write_pc (gdbarch, ia64_linux_write_pc);
+
+ /* 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);
+}