* mips-tdep.c (mips32_scan_prologue): Move the implementation up

[deliverable/binutils-gdb.git] / gdb / ia64-linux-tdep.c

diff --git a/gdb/ia64-linux-tdep.c b/gdb/ia64-linux-tdep.c
index 25902c57000b6adf66a68e0d81ec2e76fe630d94..c3fa443a3655deef6ae344f7d4bc219a3c195f39 100644 (file)
--- a/gdb/ia64-linux-tdep.c
+++ b/gdb/ia64-linux-tdep.c
@@ -1,6 +1,6 @@
 /* Target-dependent code for the IA-64 for GDB, the GNU debugger.
-   Copyright 2000
-   Free Software Foundation, Inc.
+
+   Copyright 2000, 2004 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -20,8 +20,10 @@
    Boston, MA 02111-1307, USA.  */
 
 #include "defs.h"
+#include "ia64-tdep.h"
 #include "arch-utils.h"
 #include "gdbcore.h"
+#include "regcache.h"
 
 /* The sigtramp code is in a non-readable (executable-only) region
    of memory called the ``gate page''.  The addresses in question
@@ -29,7 +31,7 @@
    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
@@ -93,3 +95,20 @@ ia64_linux_sigcontext_register_address (CORE_ADDR sp, int regno)
        return 0;
       }
 }
+
+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);
+}