* Makefile.in (c-exp.tab.o): Remove notice about shift/reduce conflicts

[binutils-gdb.git] / gdb / coredep.c

diff --git a/gdb/coredep.c b/gdb/coredep.c
index 87011c445fc33ea898949cd989b3787f7b14ea27..ae309800c8fecd70e32f09c410db3f90df06a974 100644 (file)
--- a/gdb/coredep.c
+++ b/gdb/coredep.c
@@ -21,37 +21,67 @@ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
    this file is more machine-specific.  */
 
 #include "defs.h"
-#include "param.h"
+#include <sys/types.h>
+#include <sys/param.h>
 #include "gdbcore.h"
+#include "value.h" /* For supply_register.  */
 
-/* Some of these are needed on various systems, perhaps, to expand
-   REGISTER_U_ADDR appropriately?  */
-/* #include <sys/core.h> */
-#include <sys/param.h>
+/* These are needed on various systems to expand REGISTER_U_ADDR.  */
+#ifndef USG
 #include <sys/dir.h>
 #include <sys/file.h>
 #include <sys/stat.h>
 #include <sys/user.h>
-#ifndef USG
-#include <sys/ptrace.h>
+#ifndef NO_PTRACE_H
+# ifdef PTRACE_IN_WRONG_PLACE
+#  include <ptrace.h>
+# else /* !PTRACE_IN_WRONG_PLACE */
+#  include <sys/ptrace.h>
+# endif /* !PTRACE_IN_WRONG_PLACE */
+#endif /* NO_PTRACE_H */
 #endif
 
+#ifdef NEED_SYS_CORE_H
+#include <sys/core.h>
+#endif
 
 /* Extract the register values out of the core file and store
-   them where `read_register' will find them.  */
+   them where `read_register' will find them.
+
+   CORE_REG_SECT points to the register values themselves, read into memory.
+   CORE_REG_SIZE is the size of that area.
+   WHICH says which set of registers we are handling (0 = int, 2 = float
+         on machines where they are discontiguous).
+   REG_ADDR is the offset from u.u_ar0 to the register values relative to
+            core_reg_sect.  This is used with old-fashioned core files to
+           locate the registers in a large upage-plus-stack ".reg" section.
+           Original upage address X is at location core_reg_sect+x+reg_addr.
+ */
 
 void
-fetch_core_registers (core_reg_sect, core_reg_size)
+fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
      char *core_reg_sect;
      unsigned core_reg_size;
+     int which;
+     unsigned reg_addr;
 {
   register int regno;
   register unsigned int addr;
   int bad_reg = -1;
+  register reg_ptr = -reg_addr;                /* Original u.u_ar0 is -reg_addr. */
+
+  /* If u.u_ar0 was an absolute address in the core file, relativize it now,
+     so we can use it as an offset into core_reg_sect.  When we're done,
+     "register 0" will be at core_reg_sect+reg_ptr, and we can use
+     register_addr to offset to the other registers.  If this is a modern
+     core file without a upage, reg_ptr will be zero and this is all a big
+     NOP.  */
+  if (reg_ptr > core_reg_size)
+    reg_ptr -= KERNEL_U_ADDR;
 
   for (regno = 0; regno < NUM_REGS; regno++)
     {
-      addr = register_addr (regno, core_reg_size);
+      addr = register_addr (regno, reg_ptr);
       if (addr >= core_reg_size) {
        if (bad_reg < 0)
          bad_reg = regno;
@@ -59,7 +89,7 @@ fetch_core_registers (core_reg_sect, core_reg_size)
        supply_register (regno, core_reg_sect + addr);
       }
     }
-  if (bad_reg > 0)
+  if (bad_reg >= 0)
     {
       error ("Register %s not found in core file.", reg_names[bad_reg]);
     }