Add support for printing SDT elf notes.

libebl/
    * libebl.h (ebl_object_note_type_name): Add const char *name arg.
    * eblhooks.h (object_note_type_name): Likewise.
    * eblopenbackend.c (default_object_note_type_name): Likewise.
    * eblobjnotetypename.c (ebl_object_note_type_name): Likewise.
    And print version if name is "stapsdt".
    * eblobjnote.c (ebl_object_note): Add output for "stapsdt" notes.
src/
    * readelf.c (handle_notes_data): Call ebl_object_note_type_name
    with note name.

8 files changed, 124 insertions, 11 deletions

diff --git a/libebl/ChangeLog b/libebl/ChangeLog
index 97315f00..ac2160de 100644
--- a/libebl/ChangeLog
+++ b/libebl/ChangeLog
@@ -1,3 +1,12 @@
+2011-04-26  Mark Wielaard  <mjw@redhat.com>
+
+	* libebl.h (ebl_object_note_type_name): Add const char *name arg.
+	* eblhooks.h (object_note_type_name): Likewise.
+	* eblopenbackend.c (default_object_note_type_name): Likewise.
+	* eblobjnotetypename.c (ebl_object_note_type_name): Likewise.
+	And print version if name is "stapsdt".
+	* eblobjnote.c (ebl_object_note): Add output for "stapsdt" notes.
+
 2011-03-21  Marek Polacek  <mpolacek@redhat.com>
 
 	* ebldynamictagname.c: Fix typo in TLSDESC_GOT.
diff --git a/libebl/ebl-hooks.h b/libebl/ebl-hooks.h
index 82c6c640..a04b3db0 100644
--- a/libebl/ebl-hooks.h
+++ b/libebl/ebl-hooks.h
@@ -111,7 +111,8 @@ const char *EBLHOOK(osabi_name) (int, char *, size_t);
 const char *EBLHOOK(core_note_type_name) (uint32_t, char *, size_t);
 
 /* Name of a note entry type for object files.  */
-const char *EBLHOOK(object_note_type_name) (uint32_t, char *, size_t);
+const char *EBLHOOK(object_note_type_name) (const char *, uint32_t,
+					    char *, size_t);
 
 /* Describe core note format.  */
 int EBLHOOK(core_note) (const GElf_Nhdr *, const char *,
diff --git a/libebl/eblobjnote.c b/libebl/eblobjnote.c
index b56c6cbc..ec5bb7da 100644
--- a/libebl/eblobjnote.c
+++ b/libebl/eblobjnote.c
@@ -1,5 +1,5 @@
 /* Print contents of object file note.
-   Copyright (C) 2002, 2007, 2009 Red Hat, Inc.
+   Copyright (C) 2002, 2007, 2009, 2011 Red Hat, Inc.
    This file is part of Red Hat elfutils.
    Written by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -68,6 +68,94 @@ ebl_object_note (ebl, name, type, descsz, desc)
 {
   if (! ebl->object_note (name, type, descsz, desc))
     /* The machine specific function did not know this type.  */
+
+    if (strcmp ("stapsdt", name) == 0)
+      {
+	if (type != 3)
+	  {
+	    printf (gettext ("unknown SDT version %u\n"), type);
+	    return;
+	  }
+
+	/* Descriptor starts with three addresses, pc, base ref and
+	   semaphore.  Then three zero terminated strings provider,
+	   name and arguments.  */
+
+	union
+	{
+	  Elf64_Addr a64[3];
+	  Elf32_Addr a32[3];
+	} addrs;
+
+	size_t addrs_size = gelf_fsize (ebl->elf, ELF_T_ADDR, 3, EV_CURRENT);
+	if (descsz < addrs_size + 3)
+	  {
+	  invalid_sdt:
+	    printf (gettext ("invalid SDT probe descriptor\n"));
+	    return;
+	  }
+
+	Elf_Data src =
+	  {
+	    .d_type = ELF_T_ADDR, .d_version = EV_CURRENT,
+	    .d_buf = (void *) desc, .d_size = addrs_size
+	  };
+
+	Elf_Data dst =
+	  {
+	    .d_type = ELF_T_ADDR, .d_version = EV_CURRENT,
+	    .d_buf = &addrs, .d_size = addrs_size
+	  };
+
+	if (gelf_xlatetom (ebl->elf, &dst, &src,
+			   elf_getident (ebl->elf, NULL)[EI_DATA]) == NULL)
+	  {
+	    printf ("%s\n", elf_errmsg (-1));
+	    return;
+	  }
+
+	const char *provider = desc + addrs_size;
+	const char *pname = memchr (provider, '\0', desc + descsz - provider);
+	if (pname == NULL)
+	  goto invalid_sdt;
+
+	++pname;
+	const char *args = memchr (pname, '\0', desc + descsz - pname);
+	if (args == NULL ||
+	    memchr (++args, '\0', desc + descsz - pname) != desc + descsz - 1)
+	  goto invalid_sdt;
+
+	GElf_Addr pc;
+	GElf_Addr base;
+	GElf_Addr sem;
+	if (gelf_getclass (ebl->elf) == ELFCLASS32)
+	  {
+	    pc = addrs.a32[0];
+	    base = addrs.a32[1];
+	    sem = addrs.a32[2];
+	  }
+	else
+	  {
+	    pc = addrs.a64[0];
+	    base = addrs.a64[1];
+	    sem = addrs.a64[2];
+	  }
+
+	printf (gettext ("    PC: "));
+	printf ("%#" PRIx64 ",", pc);
+	printf (gettext (" Base: "));
+	printf ("%#" PRIx64 ",", base);
+	printf (gettext (" Semaphore: "));
+	printf ("%#" PRIx64 "\n", sem);
+	printf (gettext ("    Provider: "));
+	printf ("%s,", provider);
+	printf (gettext (" Name: "));
+	printf ("%s,", pname);
+	printf (gettext (" Args: "));
+	printf ("'%s'\n", args);
+	return;
+      }
+
     switch (type)
       {
       case NT_GNU_BUILD_ID:
diff --git a/libebl/eblobjnotetypename.c b/libebl/eblobjnotetypename.c
index 8e99dbb4..0ceb5a87 100644
--- a/libebl/eblobjnotetypename.c
+++ b/libebl/eblobjnotetypename.c
@@ -1,5 +1,5 @@
 /* Return note type name.
-   Copyright (C) 2002, 2007, 2009 Red Hat, Inc.
+   Copyright (C) 2002, 2007, 2009, 2011 Red Hat, Inc.
    This file is part of Red Hat elfutils.
    Written by Ulrich Drepper <drepper@redhat.com>, 2002.
 
@@ -54,20 +54,28 @@
 
 #include <inttypes.h>
 #include <stdio.h>
+#include <string.h>
 #include <libeblP.h>
 
 
 const char *
-ebl_object_note_type_name (ebl, type, buf, len)
+ebl_object_note_type_name (ebl, name, type, buf, len)
      Ebl *ebl;
+     const char *name;
      uint32_t type;
      char *buf;
      size_t len;
 {
-  const char *res = ebl->object_note_type_name (type, buf, len);
+  const char *res = ebl->object_note_type_name (name, type, buf, len);
 
   if (res == NULL)
     {
+      if (strcmp (name, "stapsdt") == 0)
+	{
+	  snprintf (buf, len, "Version: %" PRIu32, type);
+	  return buf;
+	}
+
       static const char *knowntypes[] =
 	{
 #define KNOWNSTYPE(name) [NT_##name] = #name
diff --git a/libebl/eblopenbackend.c b/libebl/eblopenbackend.c
index 24f472ce..60e7f84a 100644
--- a/libebl/eblopenbackend.c
+++ b/libebl/eblopenbackend.c
@@ -184,8 +184,8 @@ static const char *default_osabi_name (int ignore, char *buf, size_t len);
 static void default_destr (struct ebl *ignore);
 static const char *default_core_note_type_name (uint32_t, char *buf,
 						size_t len);
-static const char *default_object_note_type_name (uint32_t, char *buf,
-						  size_t len);
+static const char *default_object_note_type_name (const char *name, uint32_t,
+						  char *buf, size_t len);
 static int default_core_note (const GElf_Nhdr *nhdr, const char *name,
 			      GElf_Word *regs_offset, size_t *nregloc,
 			      const Ebl_Register_Location **reglocs,
@@ -619,7 +619,8 @@ default_core_note (const GElf_Nhdr *nhdr __attribute__ ((unused)),
 }
 
 static const char *
-default_object_note_type_name (uint32_t ignore __attribute__ ((unused)),
+default_object_note_type_name (const char *name __attribute__ ((unused)),
+			       uint32_t ignore __attribute__ ((unused)),
 			       char *buf __attribute__ ((unused)),
 			       size_t len __attribute__ ((unused)))
 {
diff --git a/libebl/libebl.h b/libebl/libebl.h
index b4307282..3a334024 100644
--- a/libebl/libebl.h
+++ b/libebl/libebl.h
@@ -184,8 +184,9 @@ extern const char *ebl_core_note_type_name (Ebl *ebl, uint32_t type, char *buf,
 					    size_t len);
 
 /* Return name of the note section type for an object file.  */
-extern const char *ebl_object_note_type_name (Ebl *ebl, uint32_t type,
-					      char *buf, size_t len);
+extern const char *ebl_object_note_type_name (Ebl *ebl, const char *name,
+					      uint32_t type, char *buf,
+					      size_t len);
 
 /* Print information about object note if available.  */
 extern void ebl_object_note (Ebl *ebl, const char *name, uint32_t type,
diff --git a/src/ChangeLog b/src/ChangeLog
index 956cce2a..290bf129 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,8 @@
+2011-04-26  Mark Wielaard  <mjw@redhat.com>
+
+	* readelf.c (handle_notes_data): Call ebl_object_note_type_name
+	with note name.
+
 2011-03-24  Petr Machata  <pmachata@redhat.com>
 
 	* readelf.c (print_debug_line_section): Emit initial space for all
diff --git a/src/readelf.c b/src/readelf.c
index f2c48007..efc3571c 100644
--- a/src/readelf.c
+++ b/src/readelf.c
@@ -7904,7 +7904,7 @@ handle_notes_data (Ebl *ebl, const GElf_Ehdr *ehdr,
 	      ehdr->e_type == ET_CORE
 	      ? ebl_core_note_type_name (ebl, nhdr.n_type,
 					 buf, sizeof (buf))
-	      : ebl_object_note_type_name (ebl, nhdr.n_type,
+	      : ebl_object_note_type_name (ebl, name, nhdr.n_type,
 					   buf2, sizeof (buf2)));
 
       /* Filter out invalid entries.  */