Tue Jul 16 00:31:31 1996 Richard Henderson <rth@tamu.edu>cvs/libc-960716

	* sysdeps/alpha/dl-machine.h: Mirror Roland's changes to
	i386/dl-machine.h of 960713.

	* sysdeps/generic/dl-sysdep.c:  Include <sys/mman.h>.
	(_dl_sysdep_read_whole_file): Fix result variable declaration.

Tue Jul 16 00:53:57 1996  Roland McGrath  <roland@delasyd.gnu.ai.mit.edu>

	* sysdeps/mach/hurd/uname.c: Call __gethostname to fill in the
	`nodename' member.

Mon Jul 15 17:23:53 1996  Ulrich Drepper  <drepper@cygnus.com>

	* stdio-common/vfprintf.c (vfprintf): Call parse_one_spec
	with pointer to local variable instead of NULL.

1996-07-15  Paul Eggert  <eggert@twinsun.com>

	* time/strftime.c (strftime): Don't pass empty macro argument to `add'.

Sat Jul 13 09:53:39 1996  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/unix/sysv/linux/Makefile (sysdep_routines): Remove names
	that are already added by other means.

	* sysdeps/unix/sysv/linux/syscalls.list: Add more EXTRA's in the
	caller column to get those syscalls added automagically.

	* elf/rtld.c (dl_main) [ELF_MACHINE_DEBUG_SETUP]: Use this macro
	instead of setting the DT_DEBUG pointer.

	* csu/initfini.c (_init, _fini): Generate .end directives after
	standalone prologues and filter them out from epilogues.

1 files changed, 173 insertions, 171 deletions

diff --git a/sysdeps/alpha/dl-machine.h b/sysdeps/alpha/dl-machine.h
index 8986ed7d58..b900b769ee 100644
--- a/sysdeps/alpha/dl-machine.h
+++ b/sysdeps/alpha/dl-machine.h
@@ -18,14 +18,16 @@ License along with the GNU C Library; see the file COPYING.LIB.  If
 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
 Cambridge, MA 02139, USA.  */
 
-/* This was written in the absense of an ABI -- don't expect
+/* This was written in the absence of an ABI -- don't expect
    it to remain unchanged.  */
 
+#ifndef dl_machine_h
+#define dl_machine_h 1
+
 #define ELF_MACHINE_NAME "alpha"
 
 #include <assert.h>
 #include <string.h>
-#include <link.h>
 
 
 /* Return nonzero iff E_MACHINE is compatible with the running host.  */
@@ -35,7 +37,6 @@ elf_machine_matches_host (Elf64_Word e_machine)
   return e_machine == EM_ALPHA;
 }
 
-
 /* Return the run-time address of the _GLOBAL_OFFSET_TABLE_.
    Must be inlined in a function which uses global data.  */
 static inline Elf64_Addr *
@@ -45,7 +46,6 @@ elf_machine_got (void)
   return (Elf64_Addr *)(gp - 0x8000);
 }
 
-
 /* Return the run-time load address of the shared object.  */
 static inline Elf64_Addr
 elf_machine_load_address (void)
@@ -78,6 +78,164 @@ elf_machine_load_address (void)
   return dot + 4 + zero_disp;
 }
 
+/* Set up the loaded object described by L so its unrelocated PLT
+   entries will jump to the on-demand fixup code in dl-runtime.c.  */
+
+static inline void
+elf_machine_runtime_setup (struct link_map *l, int lazy)
+{
+  Elf64_Addr plt;
+  extern void _dl_runtime_resolve (void);
+
+  if (l->l_info[DT_JMPREL] && lazy)
+    {
+      /* The GOT entries for the functions in the PLT have not been
+	 filled in yet.  Their initial contents are directed to the
+	 PLT which arranges for the dynamic linker to be called.  */
+      plt = l->l_addr + l->l_info[DT_PLTGOT]->d_un.d_ptr;
+
+      /* This function will be called to perform the relocation.  */
+      *(Elf64_Addr *)(plt + 16) = (Elf64_Addr) &_dl_runtime_resolve;
+
+      /* Identify this shared object */
+      *(Elf64_Addr *)(plt + 24) = (Elf64_Addr) l;
+    }
+}
+
+/* This code is used in dl-runtime.c to call the `fixup' function
+   and then redirect to the address it returns.  */
+#define ELF_MACHINE_RUNTIME_TRAMPOLINE asm ( \
+"/* Trampoline for _dl_runtime_resolver */
+	.globl _dl_runtime_resolve
+	.ent _dl_runtime_resolve
+_dl_runtime_resolve:
+	lda	$sp, -168($sp)
+	.frame	$sp, 168, $26
+	/* Preserve all registers that C normally doesn't.  */
+	stq	$26, 0($sp)
+	stq	$0, 8($sp)
+	stq	$1, 16($sp)
+	stq	$2, 24($sp)
+	stq	$3, 32($sp)
+	stq	$4, 40($sp)
+	stq	$5, 48($sp)
+	stq	$6, 56($sp)
+	stq	$7, 64($sp)
+	stq	$8, 72($sp)
+	stq	$16, 80($sp)
+	stq	$17, 88($sp)
+	stq	$18, 96($sp)
+	stq	$19, 104($sp)
+	stq	$20, 112($sp)
+	stq	$21, 120($sp)
+	stq	$22, 128($sp)
+	stq	$23, 136($sp)
+	stq	$24, 144($sp)
+	stq	$25, 152($sp)
+	stq	$29, 160($sp)
+	.mask	0x27ff01ff, -168
+	/* Set up our $gp */
+	br	$gp, .+4
+	ldgp	$gp, 0($gp)
+	.prologue 1
+	/* Set up the arguments for _dl_runtime_resolve. */
+	/* $16 = link_map out of plt0 */
+	ldq	$16, 8($27)
+	/* $17 = offset of reloc entry */
+	mov	$28, $17
+	/* Do the fixup */
+	bsr	$26, fixup..ng
+	/* Move the destination address to a safe place.  */
+	mov	$0, $27
+	/* Restore program registers.  */
+	ldq	$26, 0($sp)
+	ldq	$0, 8($sp)
+	ldq	$1, 16($sp)
+	ldq	$2, 24($sp)
+	ldq	$3, 32($sp)
+	ldq	$4, 40($sp)
+	ldq	$5, 48($sp)
+	ldq	$6, 56($sp)
+	ldq	$7, 64($sp)
+	ldq	$8, 72($sp)
+	ldq	$16, 80($sp)
+	ldq	$17, 88($sp)
+	ldq	$18, 96($sp)
+	ldq	$19, 104($sp)
+	ldq	$20, 112($sp)
+	ldq	$21, 120($sp)
+	ldq	$22, 128($sp)
+	ldq	$23, 136($sp)
+	ldq	$24, 144($sp)
+	ldq	$25, 152($sp)
+	ldq	$29, 160($sp)
+	/* Clean up and turn control to the destination */
+	lda	$sp, 168($sp)
+	jmp	$31, ($27)
+	.end _dl_runtime_resolve");
+
+/* The PLT uses Elf_Rel relocs.  */
+#define elf_machine_relplt elf_machine_rela
+
+/* Mask identifying addresses reserved for the user program,
+   where the dynamic linker should not map anything.  */
+/* FIXME */
+#define ELF_MACHINE_USER_ADDRESS_MASK	(~0x1FFFFFFFFUL)
+
+/* Initial entry point code for the dynamic linker.
+   The C function `_dl_start' is the real entry point;
+   its return value is the user program's entry point.  */
+
+#define RTLD_START asm ("\
+.text
+	.globl _start
+	.globl _dl_start_user
+_start:
+	br	$gp,.+4
+	ldgp	$gp, 0($gp)
+	/* Pass pointer to argument block to _dl_start.  */
+	mov	$sp, $16
+	bsr	$26, _dl_start..ng
+_dl_start_user:
+	/* Save the user entry point address in s0.  */
+	mov	$0, $9
+	/* See if we were run as a command with the executable file
+	   name as an extra leading argument.  If so, adjust the stack
+	   pointer to skip _dl_skip_args words.  */
+	ldl	$1, _dl_skip_args
+	beq	$1, 0f
+	ldq	$2, 0($sp)
+	subq	$2, $1, $2
+	s8addq	$1, $sp, $sp
+	stq	$2, 0($sp)
+	/* Load _dl_default_scope[2] into s1 to pass to _dl_init_next.  */
+0:	ldq	$10, _dl_default_scope+16
+	/* Call _dl_init_next to return the address of an initalizer
+	   function to run.  */
+1:	mov	$10, $16
+	jsr	$26, _dl_init_next
+	ldgp	$gp, 0($26)
+	beq	$0, 2f
+	mov	$0, $27
+	jsr	$26, ($0)
+	ldgp	$gp, 0($26)
+	br	1b
+2:	/* Pass our finalizer function to the user in $0. */
+	lda	$0, _dl_fini
+	/* Jump to the user's entry point.  */
+	mov	$9, $27
+	jmp	($9)");
+
+/* Nonzero iff TYPE describes relocation of a PLT entry, so 
+   PLT entries should not be allowed to define the value.  */
+#define elf_machine_pltrel_p(type)  ((type) == R_ALPHA_JMP_SLOT)
+
+/* The alpha never uses Elf64_Rel relocations.  */
+#define ELF_MACHINE_NO_REL 1
+
+#endif /* !dl_machine_h */
+
+#ifdef RESOLVE
 
 /* Fix up the instructions of a PLT entry to invoke the function
    rather than the dynamic linker.  */
@@ -154,13 +312,11 @@ elf_alpha_fix_plt(struct link_map *l,
 static inline void
 elf_machine_rela (struct link_map *map,
 		  const Elf64_Rela *reloc,
-		  const Elf64_Sym *sym,
-		  Elf64_Addr (*resolve) (const Elf64_Sym **ref,
-					 Elf64_Addr reloc_addr,
-					 int noplt))
+		  const Elf64_Sym *sym)
 {
-  Elf64_Addr *const reloc_addr = (void *)(map->l_addr + reloc->r_offset);
-  unsigned long r_info = ELF64_R_TYPE (reloc->r_info);
+  Elf64_Addr * const reloc_addr = (void *)(map->l_addr + reloc->r_offset);
+  unsigned long const r_info = ELF64_R_TYPE (reloc->r_info);
+
 #ifndef RTLD_BOOTSTRAP
   /* This is defined in rtld.c, but nowhere in the static libc.a; make the
      reference weak so static programs can still link.  This declaration
@@ -175,8 +331,8 @@ elf_machine_rela (struct link_map *map,
 
   if (r_info == R_ALPHA_RELATIVE)
     {
-      /* Already done in dynamic linker.  */
 #ifndef RTLD_BOOTSTRAP
+      /* Already done in dynamic linker.  */
       if (map != &_dl_rtld_map)
 #endif
 	*reloc_addr += map->l_addr;
@@ -187,12 +343,8 @@ elf_machine_rela (struct link_map *map,
     {
       Elf64_Addr loadbase, sym_value;
 
-#ifndef RTLD_BOOTSTRAP
-      loadbase = (*resolve)(&sym, (Elf64_Addr)reloc_addr,
-			    r_info == R_ALPHA_JMP_SLOT);
-#else
-      loadbase = map->l_addr;
-#endif
+      loadbase = RESOLVE (&sym, (Elf64_Addr)reloc_addr,
+			  r_info == R_ALPHA_JMP_SLOT);
       sym_value = sym ? loadbase + sym->st_value : 0;
 
       if (r_info == R_ALPHA_GLOB_DAT)
@@ -233,8 +385,8 @@ elf_machine_rela (struct link_map *map,
 static inline void
 elf_machine_lazy_rel (struct link_map *map, const Elf64_Rela *reloc)
 {
-  Elf64_Addr *const reloc_addr = (void *)(map->l_addr + reloc->r_offset);
-  unsigned long r_info = ELF64_R_TYPE (reloc->r_info);
+  Elf64_Addr * const reloc_addr = (void *)(map->l_addr + reloc->r_offset);
+  unsigned long const r_info = ELF64_R_TYPE (reloc->r_info);
 
   if (r_info == R_ALPHA_JMP_SLOT)
     {
@@ -243,159 +395,9 @@ elf_machine_lazy_rel (struct link_map *map, const Elf64_Rela *reloc)
       *reloc_addr += map->l_addr;
     }
   else if (r_info == R_ALPHA_NONE)
-    ;
+    return;
   else
     assert (! "unexpected PLT reloc type");
 }
 
-/* The alpha never uses Elf_Rel relocations.  */
-#define ELF_MACHINE_NO_REL 1
-
-
-/* Set up the loaded object described by L so its unrelocated PLT
-   entries will jump to the on-demand fixup code in dl-runtime.c.  */
-
-static inline void
-elf_machine_runtime_setup (struct link_map *l, int lazy)
-{
-  Elf64_Addr plt;
-  extern void _dl_runtime_resolve (void);
-
-  if (l->l_info[DT_JMPREL] && lazy)
-    {
-      /* The GOT entries for the functions in the PLT have not been
-	 filled in yet.  Their initial contents are directed to the
-	 PLT which arranges for the dynamic linker to be called.  */
-      plt = l->l_addr + l->l_info[DT_PLTGOT]->d_un.d_ptr;
-
-      /* This function will be called to perform the relocation.  */
-      *(Elf64_Addr *)(plt + 16) = (Elf64_Addr) &_dl_runtime_resolve;
-
-      /* Identify this shared object */
-      *(Elf64_Addr *)(plt + 24) = (Elf64_Addr) l;
-    }
-}
-
-/* This code is used in dl-runtime.c to call the `fixup' function
-   and then redirect to the address it returns.  */
-#define ELF_MACHINE_RUNTIME_TRAMPOLINE asm ( \
-"/* Trampoline for _dl_runtime_resolver */
-	.globl _dl_runtime_resolve
-	.ent _dl_runtime_resolve
-_dl_runtime_resolve:
-	lda	$sp, -168($sp)
-	.frame	$sp, 168, $26
-	/* Preserve all registers that C normally doesn't.  */
-	stq	$26, 0($sp)
-	stq	$0, 8($sp)
-	stq	$1, 16($sp)
-	stq	$2, 24($sp)
-	stq	$3, 32($sp)
-	stq	$4, 40($sp)
-	stq	$5, 48($sp)
-	stq	$6, 56($sp)
-	stq	$7, 64($sp)
-	stq	$8, 72($sp)
-	stq	$16, 80($sp)
-	stq	$17, 88($sp)
-	stq	$18, 96($sp)
-	stq	$19, 104($sp)
-	stq	$20, 112($sp)
-	stq	$21, 120($sp)
-	stq	$22, 128($sp)
-	stq	$23, 136($sp)
-	stq	$24, 144($sp)
-	stq	$25, 152($sp)
-	stq	$29, 160($sp)
-	.mask	0x27ff01ff, -168
-	/* Set up our $gp */
-	br	$gp, .+4
-	ldgp	$gp, 0($gp)
-	.prologue 1
-	/* Set up the arguments for _dl_runtime_resolve. */
-	/* $16 = link_map out of plt0 */
-	ldq	$16, 8($27)
-	/* $17 = offset of reloc entry */
-	mov	$28, $17
-	/* Do the fixup */
-	bsr	$26, fixup..ng
-	/* Move the destination address to a safe place.  */
-	mov	$0, $27
-	/* Restore program registers.  */
-	ldq	$26, 0($sp)
-	ldq	$0, 8($sp)
-	ldq	$1, 16($sp)
-	ldq	$2, 24($sp)
-	ldq	$3, 32($sp)
-	ldq	$4, 40($sp)
-	ldq	$5, 48($sp)
-	ldq	$6, 56($sp)
-	ldq	$7, 64($sp)
-	ldq	$8, 72($sp)
-	ldq	$16, 80($sp)
-	ldq	$17, 88($sp)
-	ldq	$18, 96($sp)
-	ldq	$19, 104($sp)
-	ldq	$20, 112($sp)
-	ldq	$21, 120($sp)
-	ldq	$22, 128($sp)
-	ldq	$23, 136($sp)
-	ldq	$24, 144($sp)
-	ldq	$25, 152($sp)
-	ldq	$29, 160($sp)
-	/* Clean up and turn control to the destination */
-	lda	$sp, 168($sp)
-	jmp	$31, ($27)
-	.end _dl_runtime_resolve");
-
-/* The PLT uses Elf_Rel relocs.  */
-#define elf_machine_relplt elf_machine_rela
-
-/* Mask identifying addresses reserved for the user program,
-   where the dynamic linker should not map anything.  */
-/* FIXME */
-#define ELF_MACHINE_USER_ADDRESS_MASK	(~0x1FFFFFFFFUL)
-
-/* Initial entry point code for the dynamic linker.
-   The C function `_dl_start' is the real entry point;
-   its return value is the user program's entry point.  */
-
-#define RTLD_START asm ("\
-.text
-	.globl _start
-	.globl _dl_start_user
-_start:
-	br	$gp,.+4
-	ldgp	$gp, 0($gp)
-	/* Pass pointer to argument block to _dl_start.  */
-	mov	$sp, $16
-	bsr	$26, _dl_start..ng
-_dl_start_user:
-	/* Save the user entry point address in s0.  */
-	mov	$0, $9
-	/* See if we were run as a command with the executable file
-	   name as an extra leading argument.  If so, adjust the stack
-	   pointer to skip _dl_skip_args words.  */
-	ldl	$1, _dl_skip_args
-	beq	$1, 0f
-	ldq	$2, 0($sp)
-	subq	$2, $1, $2
-	s8addq	$1, $sp, $sp
-	stq	$2, 0($sp)
-	/* Load _dl_default_scope[2] into s1 to pass to _dl_init_next.  */
-0:	ldq	$10, _dl_default_scope+16
-	/* Call _dl_init_next to return the address of an initalizer
-	   function to run.  */
-1:	mov	$10, $16
-	jsr	$26, _dl_init_next
-	ldgp	$gp, 0($26)
-	beq	$0, 2f
-	mov	$0, $27
-	jsr	$26, ($0)
-	ldgp	$gp, 0($26)
-	br	1b
-2:	/* Pass our finalizer function to the user in $0. */
-	lda	$0, _dl_fini
-	/* Jump to the user's entry point.  */
-	mov	$9, $27
-	jmp	($9)");
+#endif /* RESOLVE */