Sat Jan 6 16:39:14 1996 Roland McGrath <roland@churchy.gnu.ai.mit.edu> cvs/libc-960108 cvs/libc-960107

	* Makefile (subdirs): Added db.

	* resolv/Makefile (routines): Add res_data.
	* resolv/res_data.c, resolv/res_debug.c, resolv/resolv.h:
	Updated from BIND 4.9.3 final release.

	* elf/dynamic-link.h (elf_get_dynamic_info): Handle
	processor-specific tags.
	(ELF_DYNAMIC_DO_REL, ELF_DYNAMIC_DO_RELA): Handle absent DT_PLTREL tag.

	* elf/elf.h (DT_MIPS_NUM, DT_PROCNUM): New macros.
	* elf/link.h (struct link_map): Extend `l_info' by DT_PROCNUM.

	* sysdeps/i386/dl-machine.h (elf_machine_runtime_setup): Take new
	arg LAZY.  Only do our work if LAZY and there is a DT_JMPREL record.
	* elf/dl-reloc.c (_dl_relocate_object): Call
	elf_machine_runtime_setup unconditionally, and pass it LAZY flag.

	* elf/dl-load.c: Fixed ELFMAG check to work for either byte order.
	Align end of load segment only to page size, not to segment alignment.

4 files changed, 28 insertions, 16 deletions

diff --git a/elf/dl-reloc.c b/elf/dl-reloc.c
index 7e4f4992a7..b7d484d2df 100644
--- a/elf/dl-reloc.c
+++ b/elf/dl-reloc.c
@@ -1,5 +1,5 @@
 /* Relocate a shared object and resolve its references to other loaded objects.
-Copyright (C) 1995 Free Software Foundation, Inc.
+Copyright (C) 1995, 1996 Free Software Foundation, Inc.
 This file is part of the GNU C Library.
 
 The GNU C Library is free software; you can redistribute it and/or
@@ -93,10 +93,9 @@ _dl_relocate_object (struct link_map *l, int lazy)
       l->l_prev->l_next = l;
   }
 
-  if (l->l_info[DT_JMPREL] && lazy)
-    /* Set up the PLT so its unrelocated entries will
-       jump to _dl_runtime_resolve, which will relocate them.  */
-    elf_machine_runtime_setup (l);
+  /* Set up the PLT so its unrelocated entries will
+     jump to _dl_runtime_resolve, which will relocate them.  */
+  elf_machine_runtime_setup (l, lazy);
 
   l->l_relocated = 1;
 
diff --git a/elf/dynamic-link.h b/elf/dynamic-link.h
index 84d440ec5b..0c4e99d2b6 100644
--- a/elf/dynamic-link.h
+++ b/elf/dynamic-link.h
@@ -25,11 +25,11 @@ Cambridge, MA 02139, USA.  */
 /* Read the dynamic section at DYN and fill in INFO with indices DT_*.  */
 
 static inline void
-elf_get_dynamic_info (Elf32_Dyn *dyn, Elf32_Dyn *info[DT_NUM])
+elf_get_dynamic_info (Elf32_Dyn *dyn, Elf32_Dyn *info[DT_NUM + DT_PROCNUM])
 {
   unsigned int i;
 
-  for (i = 0; i < DT_NUM; ++i)
+  for (i = 0; i < DT_NUM + DT_PROCNUM; ++i)
     info[i] = NULL;
 
   if (! dyn)
@@ -37,8 +37,14 @@ elf_get_dynamic_info (Elf32_Dyn *dyn, Elf32_Dyn *info[DT_NUM])
 
   while (dyn->d_tag != DT_NULL)
     {
-      assert (dyn->d_tag < DT_NUM);
-      info[dyn->d_tag] = dyn++;
+      if (dyn->d_tag < DT_NUM)
+	info[dyn->d_tag] = dyn;
+      else if (dyn->d_tag >= DT_LOPROC &&
+	       dyn->d_tag < DT_LOPROC + DT_PROCNUM)
+	info[dyn->d_tag - DT_LOPROC + DT_NUM] = dyn;
+      else
+	assert (! "bad dynamic tag");	
+      dyn++;
     }
 
   if (info[DT_RELA])
@@ -60,7 +66,8 @@ elf_get_dynamic_info (Elf32_Dyn *dyn, Elf32_Dyn *info[DT_NUM])
 #define ELF_DYNAMIC_DO_REL(map, lazy, resolve)				      \
   if ((map)->l_info[DT_REL])						      \
     elf_dynamic_do_rel ((map), DT_REL, DT_RELSZ, (resolve), 0);		      \
-  if ((map)->l_info[DT_PLTREL]->d_un.d_val == DT_REL)			      \
+  if ((map)->l_info[DT_PLTREL] &&					      \
+      (map)->l_info[DT_PLTREL]->d_un.d_val == DT_REL)			      \
     elf_dynamic_do_rel ((map), DT_JMPREL, DT_PLTRELSZ, (resolve), (lazy));
 #else
 #define ELF_DYNAMIC_DO_RELA(map, lazy, resolve) /* Nothing to do.  */
@@ -72,7 +79,8 @@ elf_get_dynamic_info (Elf32_Dyn *dyn, Elf32_Dyn *info[DT_NUM])
 #define ELF_DYNAMIC_DO_RELA(map, lazy, resolve)				      \
   if ((map)->l_info[DT_RELA])						      \
     elf_dynamic_do_rela ((map), DT_RELA, DT_RELASZ, (resolve), 0);	      \
-  if ((map)->l_info[DT_PLTREL]->d_un.d_val == DT_RELA)			      \
+  if ((map)->l_info[DT_PLTREL] &&					      \
+      (map)->l_info[DT_PLTREL]->d_un.d_val == DT_RELA)			      \
     elf_dynamic_do_rela ((map), DT_JMPREL, DT_PLTRELSZ, (resolve), (lazy));
 #else
 #define ELF_DYNAMIC_DO_RELA(map, lazy, resolve) /* Nothing to do.  */
diff --git a/elf/elf.h b/elf/elf.h
index 85c992cf16..6eaf31fc08 100644
--- a/elf/elf.h
+++ b/elf/elf.h
@@ -1,5 +1,5 @@
 /* This file defines standard ELF types, structures, and macros.
-Copyright (C) 1995 Free Software Foundation, Inc.
+Copyright (C) 1995, 1996 Free Software Foundation, Inc.
 Contributed by Ian Lance Taylor (ian@cygnus.com).
 
 This file is part of the GNU C Library.
@@ -326,9 +326,10 @@ typedef struct
 #define DT_DEBUG	21		/* For debugging; unspecified */
 #define DT_TEXTREL	22		/* Reloc might modify .text */
 #define DT_JMPREL	23		/* Address of PLT relocs */
-#define	DT_NUM		24		/* Number used.  */
+#define	DT_NUM		24		/* Number used */
 #define DT_LOPROC	0x70000000	/* Start of processor-specific */
 #define DT_HIPROC	0x7fffffff	/* End of processor-specific */
+#define	DT_PROCNUM	DT_MIPS_NUM	/* Most used by any processor */
 
 /* Standard 64 bit ELF types.  */
 
@@ -573,6 +574,7 @@ typedef struct
 #define DT_MIPS_UNREFEXTNO   0x70000012	/* First external DYNSYM */
 #define DT_MIPS_GOTSYM	     0x70000013	/* First GOT entry in DYNSYM */
 #define DT_MIPS_HIPAGENO     0x70000014	/* Number of GOT page table entries */
+#define DT_MIPS_NUM	     0x15
 
 /* Legal values for DT_MIPS_FLAG Elf32_Dyn entry.  */
 
diff --git a/elf/link.h b/elf/link.h
index 4848f4b99b..bdcfcf27f4 100644
--- a/elf/link.h
+++ b/elf/link.h
@@ -1,5 +1,5 @@
 /* Run-time dynamic linker data structures for loaded ELF shared objects.
-Copyright (C) 1995 Free Software Foundation, Inc.
+Copyright (C) 1995, 1996 Free Software Foundation, Inc.
 This file is part of the GNU C Library.
 
 The GNU C Library is free software; you can redistribute it and/or
@@ -82,7 +82,10 @@ struct link_map
        They may change without notice.  */
 
     const char *l_libname;	/* Name requested (before search).  */
-    Elf32_Dyn *l_info[DT_NUM];	/* Indexed pointers to dynamic section.  */
+    /* Indexed pointers to dynamic section.
+       [0,DT_NUM) are indexed by the processor-independent tags.
+       [DT_NUM,DT_NUM+DT_PROCNUM] are indexed by the tag minus DT_LOPROC.  */
+    Elf32_Dyn *l_info[DT_NUM + DT_PROCNUM];
     const Elf32_Phdr *l_phdr;	/* Pointer to program header table in core.  */
     Elf32_Word l_phnum;		/* Number of program header entries.  */
     Elf32_Addr l_entry;		/* Entry point location.  */
@@ -141,7 +144,7 @@ extern int _dl_secure;
    zero; OBJECT is the name of the problematical shared object, or null if
    it is a general problem; ERRSTRING is a string describing the specific
    problem.  */
-   
+
 extern void _dl_signal_error (int errcode,
 			      const char *object,
 			      const char *errstring)