From 978360c6ec51192ab7f1333ae9f1c105bcdb5ecd Mon Sep 17 00:00:00 2001
From: Ulrich Drepper <drepper@redhat.com>
Date: Sat, 17 Jan 2009 15:21:07 -0800
Subject: [PATCH] Beginning of exception table testing.

---
 src/elflint.c | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)

diff --git a/src/elflint.c b/src/elflint.c
index 35368a5ef..497f959ea 100644
--- a/src/elflint.c
+++ b/src/elflint.c
@@ -3359,6 +3359,13 @@ static const struct
    && !memcmp (special_sections[idx].name, string, \
 	       sizeof string - (prefix ? 1 : 0)))
 
+
+/* Indeces of some sections we need later.  */
+static size_t eh_frame_hdr_scnndx;
+static size_t eh_frame_scnndx;
+static size_t gcc_except_table_scnndx;
+
+
 static void
 check_sections (Ebl *ebl, GElf_Ehdr *ehdr)
 {
@@ -3555,6 +3562,14 @@ section [%2zu] '%s' has SHF_ALLOC flag not set but there are loadable segments\n
 
 		break;
 	      }
+
+	  /* Remember a few special sections for later.  */
+	  if (strcmp (scnname, ".eh_frame_hdr") == 0)
+	    eh_frame_hdr_scnndx = cnt;
+	  else if (strcmp (scnname, ".eh_frame") == 0)
+	    eh_frame_scnndx = cnt;
+	  else if (strcmp (scnname, ".gcc_except_table") == 0)
+	    gcc_except_table_scnndx = cnt;
 	}
 
       if (shdr->sh_entsize != 0 && shdr->sh_size % shdr->sh_entsize)
@@ -3962,6 +3977,7 @@ section [%2d] '%s': unknown object file note type %" PRIu32
   return last_offset;
 }
 
+
 static void
 check_note (Ebl *ebl, GElf_Ehdr *ehdr, GElf_Phdr *phdr, int cnt)
 {
@@ -3993,6 +4009,7 @@ phdr[%d]: no note entries defined for the type of file\n"),
 	   cnt, phdr->p_filesz - notes_size);
 }
 
+
 static void
 check_note_section (Ebl *ebl, GElf_Ehdr *ehdr, GElf_Shdr *shdr, int idx)
 {
@@ -4024,6 +4041,11 @@ section [%2d] '%s': no note entries defined for the type of file\n"),
 	   idx, section_name (ebl, idx), shdr->sh_size - notes_size);
 }
 
+
+/* Index of the PT_GNU_EH_FRAME program eader entry.  */
+static int pt_gnu_eh_frame_pndx;
+
+
 static void
 check_program_header (Ebl *ebl, GElf_Ehdr *ehdr)
 {
@@ -4207,6 +4229,9 @@ call frame search table must not be writable\n"));
 	  if ((phdr->p_flags & PF_X) != 0)
 	    ERROR (gettext ("\
 call frame search table must not be executable\n"));
+
+	  /* Remember which entry this is.  */
+	  pt_gnu_eh_frame_pndx = cnt;
 	}
 
       if (phdr->p_filesz > phdr->p_memsz
@@ -4228,6 +4253,14 @@ program header entry %d: file offset and virtual address not module of alignment
 }
 
 
+static void
+check_exception_data (Ebl *ebl, GElf_Ehdr *ehdr)
+{
+  ebl;
+  ehdr;
+}
+
+
 /* Process one file.  */
 static void
 process_elf_file (Elf *elf, const char *prefix, const char *suffix,
@@ -4276,6 +4309,11 @@ process_elf_file (Elf *elf, const char *prefix, const char *suffix,
      headers at all.  */
   check_sections (ebl, ehdr);
 
+  /* Check the exception handling data, if it exists.  */
+  if (pt_gnu_eh_frame_pndx != 0 || eh_frame_hdr_scnndx != 0
+      || eh_frame_scnndx != 0 || gcc_except_table_scnndx != 0)
+    check_exception_data (ebl, ehdr);
+
   /* Report if no relocation section needed the text relocation flag.  */
   if (textrel && !needed_textrel)
     ERROR (gettext ("text relocation flag set but not needed\n"));
-- 
2.47.2