Update. cvs/libc-ud-970926

1997-09-27 01:14  Ulrich Drepper  <drepper@cygnus.com>

	* Makeconfig (extra-objs): Depend in before-compile.

	* configure.in: Locate Perl and substitute with complete path.
	* config.make.in: Add PERL for substitution.
	* elf/Makefile (routines): Add dl-addr.
	* elf/dladdr.c: Move the real code into ...
	* elf/dl-addr.c: New file.
	* elf/link.h: Add prototype for _dl_addr.

	* elf/dladdr.c (dladdr): Change address argument to be const.
	* elf/dlfcn.h: Likewise.

	* locale/C_name.c: Add _nl_POSIX_name.
	* locale/localeinfo.h: Add declaration of _nl_POSIX_name.
	* locale/findlocale.c (_nl_find_locale): Use _nl_POSIX_name.
	(_nl_remove_locale): Free name of data set.
	* locale/setlocale.c (clever_copy): Remove.
	(new_composite_name): Use _nl_C_name and _nl_POSIX_name in compare.
	(setname): Only remove old name when it is for category LC_ALL.

	Change malloc, free, realloc, and memalign hooks for glibc to take
	another parameter indicating the location of the caller.
	* malloc/malloc.c: Change hook functions and variables.
	* malloc/malloc.h: Likewise.
	* malloc/mcheck.c: Likewise.  Make sure later hooked function also
	get the original caller address.
	* malloc/mtrace.c: Likewise.
	(tr_where): If no information in _mtrace_file is given use the
	information about the caller.
	* malloc/Makefile (distribute): Replace mtrace.awk by mtrace.pl.
	Add rules to install mtrace.pl after rewriting.
	* malloc/mtrace.pl: New file.  Based on the old AWK script but
	with extended functionality.
	* malloc/mtrace.awk: Removed.

	* po/fr.po: New version.

	* string/Makefile: Do use builtins for tester.c and inl-tester.c.
	* string/tester.c: Rewrite.  Split in many small functions to not
	exceed gcc's limits.

	* sysdeps/unix/sysv/linux/syscalls.list: Add prctl.

1997-09-25  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* string/bits/string2.h (__stpcpy_small): Don't use casts as
	lvalues.

1997-09-26  Andreas Jaeger  <aj@arthur.rhein-neckar.de>

	* manual/time.texi (Formatting Date and Time): Clarify
	explanation of strftime flags a bit.
	Suggested by Robert Bihlmeyer <robbe@orcus.priv.at>.

1997-09-25 00:13  David S. Miller  <davem@tanya.rutgers.edu>

	* sysdeps/libm-ieee754/s_exp2f.c: Protect _GNU_SOURCE definition.
	Fix typo, it is FLT_MANT_DIG.

1997-09-24 18:52  H.J. Lu  <hjl@gnu.ai.mit.edu>

	* math/atest-exp2.c: Include <stdlib/gmp.h> instead of <gmp.h>.

1997-08-27 08:10  H.J. Lu  <hjl@gnu.ai.mit.edu>

	* libio/libio.h, libio/libioP.h: Support libio in libstdc++.

	* libio/libio.h (_IO_peekc): Defined as _IO_peekc_unlocked if
	_IO_MTSAFE_IO is undefined.

1997-09-24 23:27  Richard Henderson  <rth@cygnus.com>

	* elf/dl-runtime.c (fixup): Don't go through elf_machine_relplt, but
	lookup the value of the target symbol ourselves and call the new
	elf_machine_fixup_plt.  This kills the ELF_FIXUP_RETURN_VALUE hack.
	(profile_fixup): Likewise, but don't fix up the plt.
	* elf/rtld.c (_dl_main): ELF_MACHINE_RELOC_NOPLT renamed _JMP_SLOT.
	* sysdeps/alpha/dl-machine.h (ELF_MACHINE_RELOC_NOPLT): Renamed.
	(elf_alpha_fix_plt): Renamed elf_machine_fixup_plt.
	* sysdeps/i386/dl-machine.h (elf_machine_relplt): Killed.
	(ELF_MACHINE_JMP_SLOT): Renamed.
	(elf_machine_fixup_plt): New function.
	* sysdeps/m68k/dl-machine.h: Likewise.
	* sysdeps/powerpc/dl-machine.h: Likewise.
	(elf_machine_rela): Moved JMP_SLOT fixup out to elf_machine_fixup_plt.
	* sysdeps/sparc/sparc32/dl-machine.h: Likewise.
	* sysdeps/sparc/sparc64/dl-machine.h: Likewise.
	* sysdeps/stub/dl-machine.h: Update, sorta.

	* sysdeps/alpha/dl-machine.h (elf_machine_runtime_setup): Do profiling.
	(TRAMPOLINE_TEMPLATE): From the carcas of _RUNTIME_TRAMPOLINE, do
	both normal and profile code.
	(elf_machine_rela): Handle r_addend for .got and .plt too.

1 files changed, 67 insertions, 67 deletions

diff --git a/sysdeps/powerpc/dl-machine.h b/sysdeps/powerpc/dl-machine.h
index 70a3f20b31..beabc1d4ff 100644
--- a/sysdeps/powerpc/dl-machine.h
+++ b/sysdeps/powerpc/dl-machine.h
@@ -197,8 +197,7 @@ _dl_runtime_resolve:
  # ...unwind the stack frame, and jump to the PLT entry we updated.
 	addi 1,1,48
 	bctr
-0:
-	.size	 _dl_runtime_resolve,0b-_dl_runtime_resolve
+	.size	 _dl_runtime_resolve,.-_dl_runtime_resolve
 
 	.align 2
 	.globl _dl_prof_resolve
@@ -395,10 +394,6 @@ static ElfW(Addr) _dl_preferred_address = 1
      _dl_preferred_address = mapstart;					      \
 } )
 
-/* We require the address of the PLT entry returned from fixup, not
-   the first word of the PLT entry. */
-#define ELF_FIXUP_RETURN_VALUE(map, result)  ((Elf32_Addr) &(result))
-
 /* Nonzero iff TYPE should not be allowed to resolve to one of
    the main executable's symbols, as for a COPY reloc.  */
 #define elf_machine_lookup_noexec_p(type) ((type) == R_PPC_COPY)
@@ -413,7 +408,7 @@ static ElfW(Addr) _dl_preferred_address = 1
 					  (type) == R_PPC_JMP_SLOT)
 
 /* A reloc type used for ld.so cmdline arg lookups to reject PLT entries.  */
-#define ELF_MACHINE_RELOC_NOPLT	R_PPC_JMP_SLOT
+#define ELF_MACHINE_JMP_SLOT	R_PPC_JMP_SLOT
 
 /* Nonzero iff TYPE describes relocation of a PLT entry, so
    PLT entries should not be allowed to define the value.  */
@@ -554,6 +549,70 @@ elf_machine_lazy_rel (struct link_map *map, const Elf32_Rela *reloc)
   /* elf_machine_runtime_setup handles this. */
 }
 
+static inline void
+elf_machine_fixup_plt(struct link_map *map, const Elf32_Rela *reloc,
+                      Elf32_Addr *reloc_addr, Elf32_Addr finaladdr)
+{
+  Elf32_Sword delta = finaladdr - (Elf32_Word) (char *) reloc_addr;
+  if (delta << 6 >> 6 == delta)
+    *reloc_addr = OPCODE_B (delta);
+  else if (finaladdr <= 0x01fffffc || finaladdr >= 0xfe000000)
+    *reloc_addr = OPCODE_BA (finaladdr);
+  else
+    {
+      Elf32_Word *plt;
+      Elf32_Word index;
+
+      plt = (Elf32_Word *)((char *)map->l_addr
+			   + map->l_info[DT_PLTGOT]->d_un.d_val);
+      index = (reloc_addr - plt - PLT_INITIAL_ENTRY_WORDS)/2;
+      if (index >= PLT_DOUBLE_SIZE)
+	{
+	  /* Slots greater than or equal to 2^13 have 4 words available
+	     instead of two.  */
+	  /* FIXME: There are some possible race conditions in this code,
+	     when called from 'fixup'.
+
+	     1) Suppose that a lazy PLT entry is executing, a context switch
+	     between threads (or a signal) occurs, and the new thread or
+	     signal handler calls the same lazy PLT entry.  Then the PLT entry
+	     would be changed while it's being run, which will cause a segfault
+	     (almost always).
+
+	     2) Suppose the reverse: that a lazy PLT entry is being updated,
+	     a context switch occurs, and the new code calls the lazy PLT
+	     entry that is being updated.  Then the half-fixed PLT entry will
+	     be executed, which will also almost always cause a segfault.
+
+	     These problems don't happen with the 2-word entries, because
+	     only one of the two instructions are changed when a lazy entry
+	     is retargeted at the actual PLT entry; the li instruction stays
+	     the same (we have to update it anyway, because we might not be
+	     updating a lazy PLT entry).  */
+
+	  reloc_addr[0] = OPCODE_LI (11, finaladdr);
+	  reloc_addr[1] = OPCODE_ADDIS (11, 11, finaladdr + 0x8000 >> 16);
+	  reloc_addr[2] = OPCODE_MTCTR (11);
+	  reloc_addr[3] = OPCODE_BCTR ();
+	}
+      else
+	{
+	  Elf32_Word num_plt_entries;
+
+	  num_plt_entries = (map->l_info[DT_PLTRELSZ]->d_un.d_val
+			     / sizeof(Elf32_Rela));
+
+	  plt[index+PLT_DATA_START_WORDS (num_plt_entries)] = finaladdr;
+	  reloc_addr[0] = OPCODE_LI (11, index*4);
+	  reloc_addr[1] = OPCODE_B (-(4*(index*2
+					 + 1
+					 - PLT_LONGBRANCH_ENTRY_WORDS
+					 + PLT_INITIAL_ENTRY_WORDS)));
+	}
+    }
+  MODIFIED_CODE (reloc_addr);
+}
+
 #endif /* dl_machine_h */
 
 #ifdef RESOLVE
@@ -674,66 +733,7 @@ elf_machine_rela (struct link_map *map, const Elf32_Rela *reloc,
     }
   else if (rinfo == R_PPC_JMP_SLOT)
     {
-      Elf32_Sword delta = finaladdr - (Elf32_Word) (char *) reloc_addr;
-      if (delta << 6 >> 6 == delta)
-	*reloc_addr = OPCODE_B (delta);
-      else if (finaladdr <= 0x01fffffc || finaladdr >= 0xfe000000)
-	*reloc_addr = OPCODE_BA (finaladdr);
-      else
-	{
-	  Elf32_Word *plt;
-	  Elf32_Word index;
-
-	  plt = (Elf32_Word *)((char *)map->l_addr
-			       + map->l_info[DT_PLTGOT]->d_un.d_val);
-	  index = (reloc_addr - plt - PLT_INITIAL_ENTRY_WORDS)/2;
-	  if (index >= PLT_DOUBLE_SIZE)
-	    {
-	      /* Slots greater than or equal to 2^13 have 4 words available
-		 instead of two.  */
-	      /* FIXME: There are some possible race conditions in this code,
-		 when called from 'fixup'.
-
-		 1) Suppose that a lazy PLT entry is executing, a
-		 context switch between threads (or a signal) occurs,
-		 and the new thread or signal handler calls the same
-		 lazy PLT entry.  Then the PLT entry would be changed
-		 while it's being run, which will cause a segfault
-		 (almost always).
-
-		 2) Suppose the reverse: that a lazy PLT entry is
-		 being updated, a context switch occurs, and the new
-		 code calls the lazy PLT entry that is being updated.
-		 Then the half-fixed PLT entry will be executed, which
-		 will also almost always cause a segfault.
-
-		 These problems don't happen with the 2-word entries, because
-		 only one of the two instructions are changed when a lazy
-		 entry is retargeted at the actual PLT entry; the li
-		 instruction stays the same (we have to update it anyway,
-		 because we might not be updating a lazy PLT entry).  */
-	      reloc_addr[0] = OPCODE_LI (11, finaladdr);
-	      reloc_addr[1] = OPCODE_ADDIS (11, 11, finaladdr + 0x8000 >> 16);
-	      reloc_addr[2] = OPCODE_MTCTR (11);
-	      reloc_addr[3] = OPCODE_BCTR ();
-	    }
-	  else
-	    {
-	      Elf32_Word num_plt_entries;
-
-	      num_plt_entries = (map->l_info[DT_PLTRELSZ]->d_un.d_val
-				 / sizeof(Elf32_Rela));
-
-	      plt[index+PLT_DATA_START_WORDS (num_plt_entries)] = finaladdr;
-	      reloc_addr[0] = OPCODE_LI (11, index*4);
-	      reloc_addr[1] =
-		OPCODE_B (-(4*(index*2
-			       + 1
-			       - PLT_LONGBRANCH_ENTRY_WORDS
-			       + PLT_INITIAL_ENTRY_WORDS)));
-	    }
-	}
-      MODIFIED_CODE (reloc_addr);
+      elf_machine_fixup_plt (map, reloc, reloc_addr, finalvalue);
     }
   else
     {