Update.

2003-04-15  Ulrich Drepper  <drepper@redhat.com>

	* elf/elf.h: Define AT_SYSINFO_EH_FRAME.
	* sysdeps/generic/dl-sysdep.c (_dl_sysdep_start): Handle
	AT_SYSINFO_EH_FRAME.
	(_dl_show_auxv):Display AT_SYSINFO_EH_FRAME value.
	* sysdeps/generic/ldsodefs.h [NEED_DL_SYSINFO] (struct rtld_global):
	Add _dl_sysinfo_eh_frame field.
	* elf/dl-support.c [NEED_DL_SYSINFO]: Define _dl_sysinfo_eh_frame.
	* sysdeps/generic/libc-start.c [NEED_DL_SYSINFO] Define eh_obj
	variable.
	[NEED_DL_SYSINFO] (LIBC_START_MAIN): Call __register_frame_info_bases
	if _dl_sysinfo_eh_frame is non-NULL.

	* Makeconfig (gnulib): Add -lgcc_eh.

	* config.h.in: Define HAVE_FORCED_UNWIND.

3 files changed, 41 insertions, 22 deletions

diff --git a/sysdeps/generic/dl-sysdep.c b/sysdeps/generic/dl-sysdep.c
index 4d80dd7689..2c73b64f90 100644
--- a/sysdeps/generic/dl-sysdep.c
+++ b/sysdeps/generic/dl-sysdep.c
@@ -139,6 +139,9 @@ _dl_sysdep_start (void **start_argptr,
       case AT_SYSINFO:
 	GL(dl_sysinfo) = av->a_un.a_val;
 	break;
+      case AT_SYSINFO_EH_FRAME:
+	GL(dl_sysinfo_eh_frame) = av->a_un.a_val;
+	break;
 #endif
 #ifdef DL_PLATFORM_AUXV
       DL_PLATFORM_AUXV
@@ -160,7 +163,7 @@ _dl_sysdep_start (void **start_argptr,
   SEE (EGID, gid, egid);
 #endif
 
-  /* If one of the two pairs of IDs does not mattch this is a setuid
+  /* If one of the two pairs of IDs does not match this is a setuid
      or setgid run.  */
   INTUSE(__libc_enable_secure) = uid | gid;
 
@@ -228,27 +231,28 @@ _dl_show_auxv (void)
 	enum { dec, hex, str } form;
       } auxvars[] =
 	{
-	  [AT_EXECFD - 2] =		{ "AT_EXECFD:      ", dec },
-	  [AT_PHDR - 2] =		{ "AT_PHDR:        0x", hex },
-	  [AT_PHENT - 2] =		{ "AT_PHENT:       ", dec },
-	  [AT_PHNUM - 2] =		{ "AT_PHNUM:       ", dec },
-	  [AT_PAGESZ - 2] =		{ "AT_PAGESZ:      ", dec },
-	  [AT_BASE - 2] =		{ "AT_BASE:        0x", hex },
-	  [AT_FLAGS - 2] =		{ "AT_FLAGS:       0x", hex },
-	  [AT_ENTRY - 2] =		{ "AT_ENTRY:       0x", hex },
-	  [AT_NOTELF - 2] =		{ "AT_NOTELF:      ", hex },
-	  [AT_UID - 2] =		{ "AT_UID:         ", dec },
-	  [AT_EUID - 2] =		{ "AT_EUID:        ", dec },
-	  [AT_GID - 2] =		{ "AT_GID:         ", dec },
-	  [AT_EGID - 2] =		{ "AT_EGID:        ", dec },
-	  [AT_PLATFORM - 2] =		{ "AT_PLATFORM:    ", str },
-	  [AT_HWCAP - 2] =		{ "AT_HWCAP:       ", hex },
-	  [AT_CLKTCK - 2] =		{ "AT_CLKTCK:      ", dec },
-	  [AT_FPUCW - 2] =		{ "AT_FPUCW:       ", hex },
-	  [AT_DCACHEBSIZE - 2] =	{ "AT_DCACHEBSIZE: 0x", hex },
-	  [AT_ICACHEBSIZE - 2] =	{ "AT_ICACHEBSIZE: 0x", hex },
-	  [AT_UCACHEBSIZE - 2] =	{ "AT_UCACHEBSIZE: 0x", hex },
-	  [AT_SYSINFO - 2] =		{ "AT_SYSINFO:     0x", hex }
+	  [AT_EXECFD - 2] =		{ "AT_EXECFD:           ", dec },
+	  [AT_PHDR - 2] =		{ "AT_PHDR:             0x", hex },
+	  [AT_PHENT - 2] =		{ "AT_PHENT:            ", dec },
+	  [AT_PHNUM - 2] =		{ "AT_PHNUM:            ", dec },
+	  [AT_PAGESZ - 2] =		{ "AT_PAGESZ:           ", dec },
+	  [AT_BASE - 2] =		{ "AT_BASE:             0x", hex },
+	  [AT_FLAGS - 2] =		{ "AT_FLAGS:            0x", hex },
+	  [AT_ENTRY - 2] =		{ "AT_ENTRY:            0x", hex },
+	  [AT_NOTELF - 2] =		{ "AT_NOTELF:           ", hex },
+	  [AT_UID - 2] =		{ "AT_UID:              ", dec },
+	  [AT_EUID - 2] =		{ "AT_EUID:             ", dec },
+	  [AT_GID - 2] =		{ "AT_GID:              ", dec },
+	  [AT_EGID - 2] =		{ "AT_EGID:             ", dec },
+	  [AT_PLATFORM - 2] =		{ "AT_PLATFORM:         ", str },
+	  [AT_HWCAP - 2] =		{ "AT_HWCAP:            ", hex },
+	  [AT_CLKTCK - 2] =		{ "AT_CLKTCK:           ", dec },
+	  [AT_FPUCW - 2] =		{ "AT_FPUCW:            ", hex },
+	  [AT_DCACHEBSIZE - 2] =	{ "AT_DCACHEBSIZE:      0x", hex },
+	  [AT_ICACHEBSIZE - 2] =	{ "AT_ICACHEBSIZE:      0x", hex },
+	  [AT_UCACHEBSIZE - 2] =	{ "AT_UCACHEBSIZE:      0x", hex },
+	  [AT_SYSINFO - 2] =		{ "AT_SYSINFO:          0x", hex },
+	  [AT_SYSINFO_EH_FRAME - 2] =	{ "AT_SYSINFO_EH_FRAME: 0x", hex }
 	};
       unsigned int idx = (unsigned int) (av->a_type - 2);
 
diff --git a/sysdeps/generic/ldsodefs.h b/sysdeps/generic/ldsodefs.h
index e8234026e8..8be15b1cae 100644
--- a/sysdeps/generic/ldsodefs.h
+++ b/sysdeps/generic/ldsodefs.h
@@ -394,6 +394,9 @@ struct rtld_global
 #ifdef NEED_DL_SYSINFO
   /* Syscall handling improvements.  This is very specific to x86.  */
   EXTERN uintptr_t _dl_sysinfo;
+
+  /* Address of the unwind info for the vsyscall page.  */
+  EXTERN uintptr_t _dl_sysinfo_eh_frame;
 #endif
 
 #ifdef SHARED
diff --git a/sysdeps/generic/libc-start.c b/sysdeps/generic/libc-start.c
index b98f0a2aa0..318d070f4b 100644
--- a/sysdeps/generic/libc-start.c
+++ b/sysdeps/generic/libc-start.c
@@ -28,6 +28,11 @@ extern void __libc_init_first (int argc, char **argv, char **envp);
 extern int __libc_multiple_libcs;
 extern void *__libc_stack_end;
 
+#ifdef NEED_DL_SYSINFO
+# include "unwind-dw2-fde.h"
+static struct object eh_obj;
+#endif
+
 #include <tls.h>
 #ifndef SHARED
 # include <dl-osinfo.h>
@@ -150,6 +155,13 @@ LIBC_START_MAIN (int (*main) (int, char **, char ** MAIN_AUXVEC_DECL),
     __libc_check_standard_fds ();
 #endif
 
+#ifdef NEED_DL_SYSINFO
+  /* Register the kernel's unwind table.  */
+  if (GL(dl_sysinfo_eh_frame) != 0)
+    INTUSE(__register_frame_info_bases) ((void *) GL(dl_sysinfo_eh_frame),
+					 &eh_obj, 0, 0);
+#endif
+
   /* Register the destructor of the dynamic linker if there is any.  */
   if (__builtin_expect (rtld_fini != NULL, 1))
     __cxa_atexit ((void (*) (void *)) rtld_fini, NULL, NULL);