* dwarf2read.c (lookup_dwo_comp_unit): Enhance comment.

[deliverable/binutils-gdb.git] / gdb / solib-som.c

diff --git a/gdb/solib-som.c b/gdb/solib-som.c
index 758db07ee28bc73894ed0cf1bad91baf72f0a59b..6100cbe6748f83fb7803d8f63a3817dcff16eb6b 100644 (file)
--- a/gdb/solib-som.c
+++ b/gdb/solib-som.c
@@ -1,7 +1,6 @@
 /* Handle SOM shared libraries.
 
 /* Handle SOM shared libraries.
 

-   Copyright (C) 2004, 2005, 2007, 2008, 2009, 2010
-   Free Software Foundation, Inc.
+   Copyright (C) 2004-2005, 2007-2012 Free Software Foundation, Inc.

 
    This file is part of GDB.
 
 
    This file is part of GDB.
 


@@ -32,7 +31,6 @@
 #include "solib.h"
 #include "solib-som.h"
 
 #include "solib.h"
 #include "solib-som.h"
 

-#include <sys/utsname.h>

 #include <string.h>
 
 #undef SOLIB_SOM_DBG 
 #include <string.h>
 
 #undef SOLIB_SOM_DBG 


@@ -40,8 +38,8 @@
 /* These ought to be defined in some public interface, but aren't.  They
    define the meaning of the various bits in the distinguished __dld_flags
    variable that is declared in every debuggable a.out on HP-UX, and that
 /* These ought to be defined in some public interface, but aren't.  They
    define the meaning of the various bits in the distinguished __dld_flags
    variable that is declared in every debuggable a.out on HP-UX, and that

-   is shared between the debugger and the dynamic linker.
- */
+   is shared between the debugger and the dynamic linker.  */
+

 #define DLD_FLAGS_MAPPRIVATE    0x1
 #define DLD_FLAGS_HOOKVALID     0x2
 #define DLD_FLAGS_LISTVALID     0x4
 #define DLD_FLAGS_MAPPRIVATE    0x1
 #define DLD_FLAGS_HOOKVALID     0x2
 #define DLD_FLAGS_LISTVALID     0x4


@@ -49,7 +47,8 @@
 
 struct lm_info
   {
 
 struct lm_info
   {

-    /* Version of this structure (it is expected to change again in hpux10).  */
+    /* Version of this structure (it is expected to change again in
+       hpux10).  */

     unsigned char struct_version;
 
     /* Binding mode for this library.  */
     unsigned char struct_version;
 
     /* Binding mode for this library.  */


@@ -87,8 +86,8 @@ struct lm_info
   };
 
 /* These addresses should be filled in by som_solib_create_inferior_hook.
   };
 
 /* These addresses should be filled in by som_solib_create_inferior_hook.

-   They are also used elsewhere in this module.
- */
+   They are also used elsewhere in this module.  */
+

 typedef struct
   {
     CORE_ADDR address;
 typedef struct
   {
     CORE_ADDR address;


@@ -96,7 +95,7 @@ typedef struct
   }
 addr_and_unwind_t;
 
   }
 addr_and_unwind_t;
 

-/* When adding fields, be sure to clear them in _initialize_som_solib. */
+/* When adding fields, be sure to clear them in _initialize_som_solib.  */

 static struct
   {
     int is_valid;
 static struct
   {
     int is_valid;


@@ -130,24 +129,23 @@ som_relocate_section_addresses (struct so_list *so,
     ;
 }
 
     ;
 }
 

-/* Get HP-UX major release number.  Returns zero if the
-   release is not known.  */

 
 

-static int
-get_hpux_major_release (void)
-{
-  static int hpux_major_release = -1;
+/* Variable storing HP-UX major release number.

 
 

-  if (hpux_major_release == -1)
-    {
-      struct utsname x;
-      char *p;
+   On non-native system, simply assume that the major release number
+   is 11.  On native systems, hppa-hpux-nat.c initialization code
+   sets this number to the real one on startup.
+   
+   We cannot compute this value here, because we need to make a native
+   call to "uname".  We are are not allowed to do that from here, as
+   this file is used for both native and cross debugging.  */

 
 

-      uname (&x);
-      p = strchr (x.release, '.');
-      hpux_major_release = p ? atoi (p + 1) : 0;
-    }
+#define DEFAULT_HPUX_MAJOR_RELEASE 11
+int hpux_major_release = DEFAULT_HPUX_MAJOR_RELEASE;

 
 

+static int
+get_hpux_major_release (void)
+{

   return hpux_major_release;
 }
 
   return hpux_major_release;
 }
 


@@ -183,7 +181,7 @@ struct {
    means running until the "_start" is called.  */
 
 static void
    means running until the "_start" is called.  */
 
 static void

-som_solib_create_inferior_hook (void)
+som_solib_create_inferior_hook (int from_tty)

 {
   enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch);
   struct minimal_symbol *msymbol;
 {
   enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch);
   struct minimal_symbol *msymbol;


@@ -192,10 +190,6 @@ som_solib_create_inferior_hook (void)
   char buf[4];
   CORE_ADDR anaddr;
 
   char buf[4];
   CORE_ADDR anaddr;
 

-  /* First, remove all the solib event breakpoints.  Their addresses
-     may have changed since the last time we ran the program.  */
-  remove_solib_event_breakpoints ();
-

   if (symfile_objfile == NULL)
     return;
 
   if (symfile_objfile == NULL)
     return;
 


@@ -242,8 +236,8 @@ GDB will be unable to track shl_load/shl_unload calls"));
      Note that the above is the pre-HP-UX 9.0 behaviour.  At 9.0 and above,
      the dld provides an export stub named "__d_trap" as well as the
      function named "__d_trap" itself, but doesn't provide "_DLD_HOOK".
      Note that the above is the pre-HP-UX 9.0 behaviour.  At 9.0 and above,
      the dld provides an export stub named "__d_trap" as well as the
      function named "__d_trap" itself, but doesn't provide "_DLD_HOOK".

-     We'll look first for the old flavor and then the new.
-   */
+     We'll look first for the old flavor and then the new.  */
+

   msymbol = lookup_minimal_symbol ("_DLD_HOOK", NULL, symfile_objfile);
   if (msymbol == NULL)
     msymbol = lookup_minimal_symbol ("__d_trap", NULL, symfile_objfile);
   msymbol = lookup_minimal_symbol ("_DLD_HOOK", NULL, symfile_objfile);
   if (msymbol == NULL)
     msymbol = lookup_minimal_symbol ("__d_trap", NULL, symfile_objfile);


@@ -325,10 +319,11 @@ keep_going:
       && (dl_header.flags & SHLIB_TEXT_PRIVATE_ENABLE) == 0
       && (dld_flags & DLD_FLAGS_MAPPRIVATE) == 0)
     warning
       && (dl_header.flags & SHLIB_TEXT_PRIVATE_ENABLE) == 0
       && (dld_flags & DLD_FLAGS_MAPPRIVATE) == 0)
     warning

-      (_("Private mapping of shared library text was not specified\n"
-        "by the executable; setting a breakpoint in a shared library which\n"
-        "is not privately mapped will not work.  See the HP-UX 11i v3 chatr\n"
-        "manpage for methods to privately map shared library text."));
+      (_("\
+Private mapping of shared library text was not specified\n\
+by the executable; setting a breakpoint in a shared library which\n\
+is not privately mapped will not work.  See the HP-UX 11i v3 chatr\n\
+manpage for methods to privately map shared library text."));

 
   /* Turn on the flags we care about.  */
   if (get_hpux_major_release () < 11)
 
   /* Turn on the flags we care about.  */
   if (get_hpux_major_release () < 11)


@@ -340,7 +335,7 @@ keep_going:
   if (status != 0)
     error (_("Unable to write __dld_flags."));
 
   if (status != 0)
     error (_("Unable to write __dld_flags."));
 

-  /* Now find the address of _start and set a breakpoint there. 
+  /* Now find the address of _start and set a breakpoint there.

      We still need this code for two reasons:
 
      * Not all sites have /opt/langtools/lib/end.o, so it's not always
      We still need this code for two reasons:
 
      * Not all sites have /opt/langtools/lib/end.o, so it's not always


@@ -358,7 +353,7 @@ keep_going:
   /* Make the breakpoint at "_start" a shared library event breakpoint.  */
   create_solib_event_breakpoint (target_gdbarch, anaddr);
 
   /* Make the breakpoint at "_start" a shared library event breakpoint.  */
   create_solib_event_breakpoint (target_gdbarch, anaddr);
 

-  clear_symtab_users ();
+  clear_symtab_users (0);

 }
 
 static void
 }
 
 static void


@@ -377,8 +372,8 @@ som_solib_desire_dynamic_linker_symbols (void)
      we've no work to do.
 
      (If you add clauses to this test, be sure to likewise update the
      we've no work to do.
 
      (If you add clauses to this test, be sure to likewise update the

-     test within the loop.)
-   */
+     test within the loop.)  */
+

   if (dld_cache.is_valid)
     return;
 
   if (dld_cache.is_valid)
     return;
 


@@ -417,8 +412,8 @@ som_solib_desire_dynamic_linker_symbols (void)
           cover the body of "shl_unload", the second being 4 bytes past
           the end of the first.  This is a large hack to handle that
           case, but since I don't seem to have any legitimate way to
           cover the body of "shl_unload", the second being 4 bytes past
           the end of the first.  This is a large hack to handle that
           case, but since I don't seem to have any legitimate way to

-          look for this thing via the symbol table...
-        */
+          look for this thing via the symbol table...  */
+

        if (dld_cache.unload.unwind != NULL)
          {
            u = find_unwind_entry (dld_cache.unload.unwind->region_end + 4);
        if (dld_cache.unload.unwind != NULL)
          {
            u = find_unwind_entry (dld_cache.unload.unwind->region_end + 4);


@@ -445,7 +440,7 @@ som_solib_desire_dynamic_linker_symbols (void)
          }
       }
 
          }
       }
 

-    /* Did we find everything we were looking for?  If so, stop. */
+    /* Did we find everything we were looking for?  If so, stop.  */

     if ((dld_cache.load.address != 0)
        && (dld_cache.load_stub.address != 0)
        && (dld_cache.unload.address != 0)
     if ((dld_cache.load.address != 0)
        && (dld_cache.load_stub.address != 0)
        && (dld_cache.unload.address != 0)


@@ -460,8 +455,7 @@ som_solib_desire_dynamic_linker_symbols (void)
   dld_cache.hook_stub.unwind = find_unwind_entry (dld_cache.hook_stub.address);
 
   /* We're prepared not to find some of these symbols, which is why
   dld_cache.hook_stub.unwind = find_unwind_entry (dld_cache.hook_stub.address);
 
   /* We're prepared not to find some of these symbols, which is why

-     this function is a "desire" operation, and not a "require".
-   */
+     this function is a "desire" operation, and not a "require".  */

 }
 
 static int
 }
 
 static int


@@ -477,17 +471,17 @@ som_in_dynsym_resolve_code (CORE_ADDR pc)
      weren't mapped to a (writeable) private region.  However, in
      that case the debugger probably isn't able to set the fundamental
      breakpoint in the dld callback anyways, so this hack should be
      weren't mapped to a (writeable) private region.  However, in
      that case the debugger probably isn't able to set the fundamental
      breakpoint in the dld callback anyways, so this hack should be

-     safe.
-   */
+     safe.  */
+

   if ((pc & (CORE_ADDR) 0xc0000000) == (CORE_ADDR) 0xc0000000)
     return 1;
 
   /* Cache the address of some symbols that are part of the dynamic
   if ((pc & (CORE_ADDR) 0xc0000000) == (CORE_ADDR) 0xc0000000)
     return 1;
 
   /* Cache the address of some symbols that are part of the dynamic

-     linker, if not already known.
-   */
+     linker, if not already known.  */
+

   som_solib_desire_dynamic_linker_symbols ();
 
   som_solib_desire_dynamic_linker_symbols ();
 

-  /* Are we in the dld callback?  Or its export stub? */
+  /* Are we in the dld callback?  Or its export stub?  */

   u_pc = find_unwind_entry (pc);
   if (u_pc == NULL)
     return 0;
   u_pc = find_unwind_entry (pc);
   if (u_pc == NULL)
     return 0;


@@ -495,7 +489,7 @@ som_in_dynsym_resolve_code (CORE_ADDR pc)
   if ((u_pc == dld_cache.hook.unwind) || (u_pc == dld_cache.hook_stub.unwind))
     return 1;
 
   if ((u_pc == dld_cache.hook.unwind) || (u_pc == dld_cache.hook_stub.unwind))
     return 1;
 

-  /* Or the interface of the dld (i.e., "shl_load" or friends)? */
+  /* Or the interface of the dld (i.e., "shl_load" or friends)?  */

   if ((u_pc == dld_cache.load.unwind)
       || (u_pc == dld_cache.unload.unwind)
       || (u_pc == dld_cache.unload2.unwind)
   if ((u_pc == dld_cache.load.unwind)
       || (u_pc == dld_cache.unload.unwind)
       || (u_pc == dld_cache.unload2.unwind)


@@ -503,7 +497,7 @@ som_in_dynsym_resolve_code (CORE_ADDR pc)
       || (u_pc == dld_cache.unload_stub.unwind))
     return 1;
 
       || (u_pc == dld_cache.unload_stub.unwind))
     return 1;
 

-  /* Apparently this address isn't part of the dld's text. */
+  /* Apparently this address isn't part of the dld's text.  */

   return 0;
 }
 
   return 0;
 }
 


@@ -569,7 +563,7 @@ link_map_start (void)
   return extract_unsigned_integer (buf, 4, byte_order);
 }
 
   return extract_unsigned_integer (buf, 4, byte_order);
 }
 

-/* Does this so's name match the main binary? */
+/* Does this so's name match the main binary?  */

 static int
 match_main (const char *name)
 {
 static int
 match_main (const char *name)
 {


@@ -709,7 +703,7 @@ som_open_symbol_file_object (void *from_ttyp)
 
   /* First link map member should be the executable.  */
   if ((lm = link_map_start ()) == 0)
 
   /* First link map member should be the executable.  */
   if ((lm = link_map_start ()) == 0)

-    return 0;  /* failed somehow... */
+    return 0;  /* failed somehow...  */

 
   /* Read address of name from target memory to GDB.  */
   read_memory (lm + offsetof (struct dld_list, name), buf, 4);
 
   /* Read address of name from target memory to GDB.  */
   read_memory (lm + offsetof (struct dld_list, name), buf, 4);


@@ -772,10 +766,11 @@ som_solib_get_got_by_pc (CORE_ADDR addr)
   return got_value;
 }
 
   return got_value;
 }
 

-/* Return the address of the handle of the shared library in which ADDR belongs.
-   If ADDR isn't in any known shared library, return zero.  */
-/* this function is used in initialize_hp_cxx_exception_support in 
-   hppa-hpux-tdep.c  */
+/* Return the address of the handle of the shared library in which
+   ADDR belongs.  If ADDR isn't in any known shared library, return
+   zero.  */
+/* This function is used in initialize_hp_cxx_exception_support in 
+   hppa-hpux-tdep.c.  */

 
 static CORE_ADDR
 som_solib_get_solib_by_pc (CORE_ADDR addr)
 
 static CORE_ADDR
 som_solib_get_solib_by_pc (CORE_ADDR addr)


@@ -820,15 +815,15 @@ void
 som_solib_select (struct gdbarch *gdbarch)
 {
   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
 som_solib_select (struct gdbarch *gdbarch)
 {
   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);

-  set_solib_ops (gdbarch, &som_so_ops);

 
 

+  set_solib_ops (gdbarch, &som_so_ops);

   tdep->solib_thread_start_addr = som_solib_thread_start_addr;
   tdep->solib_get_got_by_pc = som_solib_get_got_by_pc;
   tdep->solib_get_solib_by_pc = som_solib_get_solib_by_pc;
 }
 
 /* The rest of these functions are not part of the solib interface; they 
   tdep->solib_thread_start_addr = som_solib_thread_start_addr;
   tdep->solib_get_got_by_pc = som_solib_get_got_by_pc;
   tdep->solib_get_solib_by_pc = som_solib_get_solib_by_pc;
 }
 
 /* The rest of these functions are not part of the solib interface; they 

-   are used by somread.c or hppa-hpux-tdep.c */
+   are used by somread.c or hppa-hpux-tdep.c.  */

 
 int
 som_solib_section_offsets (struct objfile *objfile,
 
 int
 som_solib_section_offsets (struct objfile *objfile,