cpu: add eBPF cpu description
[deliverable/binutils-gdb.git] / bfd / elf.c
index d3e391e182810ef8182ff0162d04bd801ea99cb1..952e4bfe11b4a222823a31d07615007e91b519ba 100644 (file)
--- a/bfd/elf.c
+++ b/bfd/elf.c
@@ -1,6 +1,6 @@
 /* ELF executable support for BFD.
 
-   Copyright (C) 1993-2018 Free Software Foundation, Inc.
+   Copyright (C) 1993-2019 Free Software Foundation, Inc.
 
    This file is part of BFD, the Binary File Descriptor library.
 
@@ -351,6 +351,16 @@ bfd_elf_string_from_elf_section (bfd *abfd,
       if (bfd_elf_get_str_section (abfd, shindex) == NULL)
        return NULL;
     }
+  else
+    {
+      /* PR 24273: The string section's contents may have already
+        been loaded elsewhere, eg because a corrupt file has the
+        string section index in the ELF header pointing at a group
+        section.  So be paranoid, and test that the last byte of
+        the section is zero.  */
+      if (hdr->sh_size == 0 || hdr->contents[hdr->sh_size - 1] != 0)
+       return NULL;
+    }
 
   if (strindex >= hdr->sh_size)
     {
@@ -655,7 +665,7 @@ setup_group (bfd *abfd, Elf_Internal_Shdr *hdr, asection *newsect)
                  BFD_ASSERT (sizeof (*dest) >= 4);
                  amt = shdr->sh_size * sizeof (*dest) / 4;
                  shdr->contents = (unsigned char *)
-                     bfd_alloc2 (abfd, shdr->sh_size, sizeof (*dest) / 4);
+                   bfd_alloc2 (abfd, shdr->sh_size, sizeof (*dest) / 4);
                  /* PR binutils/4110: Handle corrupt group headers.  */
                  if (shdr->contents == NULL)
                    {
@@ -2026,9 +2036,8 @@ bfd_section_from_shdr (bfd *abfd, unsigned int shindex)
        sections_being_created = NULL;
       if (sections_being_created == NULL)
        {
-         /* FIXME: It would be more efficient to attach this array to the bfd somehow.  */
          sections_being_created = (bfd_boolean *)
-           bfd_zalloc (abfd, elf_numsections (abfd) * sizeof (bfd_boolean));
+           bfd_zalloc2 (abfd, elf_numsections (abfd), sizeof (bfd_boolean));
          sections_being_created_abfd = abfd;
        }
       if (sections_being_created [shindex])
@@ -2249,7 +2258,7 @@ bfd_section_from_shdr (bfd *abfd, unsigned int shindex)
          if (entry->ndx == shindex)
            goto success;
 
-       entry = bfd_alloc (abfd, sizeof * entry);
+       entry = bfd_alloc (abfd, sizeof (*entry));
        if (entry == NULL)
          goto fail;
        entry->ndx = shindex;
@@ -3727,11 +3736,11 @@ assign_section_numbers (bfd *abfd, struct bfd_link_info *link_info)
       _bfd_elf_strtab_addref (elf_shstrtab (abfd), t->symtab_hdr.sh_name);
       if (section_number > ((SHN_LORESERVE - 2) & 0xFFFF))
        {
-         elf_section_list * entry;
+         elf_section_list *entry;
 
          BFD_ASSERT (elf_symtab_shndx_list (abfd) == NULL);
 
-         entry = bfd_zalloc (abfd, sizeof * entry);
+         entry = bfd_zalloc (abfd, sizeof (*entry));
          entry->ndx = section_number++;
          elf_symtab_shndx_list (abfd) = entry;
          entry->hdr.sh_name
@@ -7891,8 +7900,8 @@ swap_out_syms (bfd *abfd,
   symstrtab_hdr->sh_type = SHT_STRTAB;
 
   /* Allocate buffer to swap out the .strtab section.  */
-  symstrtab = (struct elf_sym_strtab *) bfd_malloc ((symcount + 1)
-                                                   * sizeof (*symstrtab));
+  symstrtab = (struct elf_sym_strtab *) bfd_malloc2 (symcount + 1,
+                                                    sizeof (*symstrtab));
   if (symstrtab == NULL)
     {
       _bfd_elf_strtab_free (stt);
@@ -8263,6 +8272,13 @@ long
 _bfd_elf_get_reloc_upper_bound (bfd *abfd ATTRIBUTE_UNUSED,
                                sec_ptr asect)
 {
+#if SIZEOF_LONG == SIZEOF_INT
+  if (asect->reloc_count >= LONG_MAX / sizeof (arelent *))
+    {
+      bfd_set_error (bfd_error_file_too_big);
+      return -1;
+    }
+#endif
   return (asect->reloc_count + 1) * sizeof (arelent *);
 }
 
@@ -8743,7 +8759,7 @@ _bfd_elf_make_empty_symbol (bfd *abfd)
 {
   elf_symbol_type *newsym;
 
-  newsym = (elf_symbol_type *) bfd_zalloc (abfd, sizeof * newsym);
+  newsym = (elf_symbol_type *) bfd_zalloc (abfd, sizeof (*newsym));
   if (!newsym)
     return NULL;
   newsym->symbol.the_bfd = abfd;
@@ -9541,6 +9557,12 @@ elfcore_grok_aarch_sve (bfd *abfd, Elf_Internal_Note *note)
   return elfcore_make_note_pseudosection (abfd, ".reg-aarch-sve", note);
 }
 
+static bfd_boolean
+elfcore_grok_aarch_pauth (bfd *abfd, Elf_Internal_Note *note)
+{
+  return elfcore_make_note_pseudosection (abfd, ".reg-aarch-pauth", note);
+}
+
 #if defined (HAVE_PRPSINFO_T)
 typedef prpsinfo_t   elfcore_psinfo_t;
 #if defined (HAVE_PRPSINFO32_T)                /* Sparc64 cross Sparc32 */
@@ -9920,94 +9942,94 @@ elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)
 
     case NT_PPC_TAR:
       if (note->namesz == 6
-          && strcmp (note->namedata, "LINUX") == 0)
-        return elfcore_grok_ppc_tar (abfd, note);
+         && strcmp (note->namedata, "LINUX") == 0)
+       return elfcore_grok_ppc_tar (abfd, note);
       else
-        return TRUE;
+       return TRUE;
 
     case NT_PPC_PPR:
       if (note->namesz == 6
-          && strcmp (note->namedata, "LINUX") == 0)
-        return elfcore_grok_ppc_ppr (abfd, note);
+         && strcmp (note->namedata, "LINUX") == 0)
+       return elfcore_grok_ppc_ppr (abfd, note);
       else
-        return TRUE;
+       return TRUE;
 
     case NT_PPC_DSCR:
       if (note->namesz == 6
-          && strcmp (note->namedata, "LINUX") == 0)
-        return elfcore_grok_ppc_dscr (abfd, note);
+         && strcmp (note->namedata, "LINUX") == 0)
+       return elfcore_grok_ppc_dscr (abfd, note);
       else
-        return TRUE;
+       return TRUE;
 
     case NT_PPC_EBB:
       if (note->namesz == 6
-          && strcmp (note->namedata, "LINUX") == 0)
-        return elfcore_grok_ppc_ebb (abfd, note);
+         && strcmp (note->namedata, "LINUX") == 0)
+       return elfcore_grok_ppc_ebb (abfd, note);
       else
-        return TRUE;
+       return TRUE;
 
     case NT_PPC_PMU:
       if (note->namesz == 6
-          && strcmp (note->namedata, "LINUX") == 0)
-        return elfcore_grok_ppc_pmu (abfd, note);
+         && strcmp (note->namedata, "LINUX") == 0)
+       return elfcore_grok_ppc_pmu (abfd, note);
       else
-        return TRUE;
+       return TRUE;
 
     case NT_PPC_TM_CGPR:
       if (note->namesz == 6
-          && strcmp (note->namedata, "LINUX") == 0)
-        return elfcore_grok_ppc_tm_cgpr (abfd, note);
+         && strcmp (note->namedata, "LINUX") == 0)
+       return elfcore_grok_ppc_tm_cgpr (abfd, note);
       else
-        return TRUE;
+       return TRUE;
 
     case NT_PPC_TM_CFPR:
       if (note->namesz == 6
-          && strcmp (note->namedata, "LINUX") == 0)
-        return elfcore_grok_ppc_tm_cfpr (abfd, note);
+         && strcmp (note->namedata, "LINUX") == 0)
+       return elfcore_grok_ppc_tm_cfpr (abfd, note);
       else
-        return TRUE;
+       return TRUE;
 
     case NT_PPC_TM_CVMX:
       if (note->namesz == 6
-          && strcmp (note->namedata, "LINUX") == 0)
-        return elfcore_grok_ppc_tm_cvmx (abfd, note);
+         && strcmp (note->namedata, "LINUX") == 0)
+       return elfcore_grok_ppc_tm_cvmx (abfd, note);
       else
-        return TRUE;
+       return TRUE;
 
     case NT_PPC_TM_CVSX:
       if (note->namesz == 6
-          && strcmp (note->namedata, "LINUX") == 0)
-        return elfcore_grok_ppc_tm_cvsx (abfd, note);
+         && strcmp (note->namedata, "LINUX") == 0)
+       return elfcore_grok_ppc_tm_cvsx (abfd, note);
       else
-        return TRUE;
+       return TRUE;
 
     case NT_PPC_TM_SPR:
       if (note->namesz == 6
-          && strcmp (note->namedata, "LINUX") == 0)
-        return elfcore_grok_ppc_tm_spr (abfd, note);
+         && strcmp (note->namedata, "LINUX") == 0)
+       return elfcore_grok_ppc_tm_spr (abfd, note);
       else
-        return TRUE;
+       return TRUE;
 
     case NT_PPC_TM_CTAR:
       if (note->namesz == 6
-          && strcmp (note->namedata, "LINUX") == 0)
-        return elfcore_grok_ppc_tm_ctar (abfd, note);
+         && strcmp (note->namedata, "LINUX") == 0)
+       return elfcore_grok_ppc_tm_ctar (abfd, note);
       else
-        return TRUE;
+       return TRUE;
 
     case NT_PPC_TM_CPPR:
       if (note->namesz == 6
-          && strcmp (note->namedata, "LINUX") == 0)
-        return elfcore_grok_ppc_tm_cppr (abfd, note);
+         && strcmp (note->namedata, "LINUX") == 0)
+       return elfcore_grok_ppc_tm_cppr (abfd, note);
       else
-        return TRUE;
+       return TRUE;
 
     case NT_PPC_TM_CDSCR:
       if (note->namesz == 6
-          && strcmp (note->namedata, "LINUX") == 0)
-        return elfcore_grok_ppc_tm_cdscr (abfd, note);
+         && strcmp (note->namedata, "LINUX") == 0)
+       return elfcore_grok_ppc_tm_cdscr (abfd, note);
       else
-        return TRUE;
+       return TRUE;
 
     case NT_S390_HIGH_GPRS:
       if (note->namesz == 6
@@ -10135,6 +10157,13 @@ elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)
       else
        return TRUE;
 
+    case NT_ARM_PAC_MASK:
+      if (note->namesz == 6
+         && strcmp (note->namedata, "LINUX") == 0)
+       return elfcore_grok_aarch_pauth (abfd, note);
+      else
+       return TRUE;
+
     case NT_PRPSINFO:
     case NT_PSINFO:
       if (bed->elf_backend_grok_psinfo)
@@ -10210,8 +10239,8 @@ static bfd_boolean
 elfobj_grok_stapsdt_note_1 (bfd *abfd, Elf_Internal_Note *note)
 {
   struct sdt_note *cur =
-    (struct sdt_note *) bfd_alloc (abfd, sizeof (struct sdt_note)
-                                  + note->descsz);
+    (struct sdt_note *) bfd_alloc (abfd,
+                                  sizeof (struct sdt_note) + note->descsz);
 
   cur->next = (struct sdt_note *) (elf_tdata (abfd))->sdt_note_head;
   cur->size = (bfd_size_type) note->descsz;
@@ -11118,158 +11147,158 @@ elfcore_write_ppc_vsx (bfd *abfd,
 
 char *
 elfcore_write_ppc_tar (bfd *abfd,
-                       char *buf,
-                       int *bufsiz,
-                       const void *ppc_tar,
-                       int size)
+                      char *buf,
+                      int *bufsiz,
+                      const void *ppc_tar,
+                      int size)
 {
   char *note_name = "LINUX";
   return elfcore_write_note (abfd, buf, bufsiz,
-                             note_name, NT_PPC_TAR, ppc_tar, size);
+                            note_name, NT_PPC_TAR, ppc_tar, size);
 }
 
 char *
 elfcore_write_ppc_ppr (bfd *abfd,
-                       char *buf,
-                       int *bufsiz,
-                       const void *ppc_ppr,
-                       int size)
+                      char *buf,
+                      int *bufsiz,
+                      const void *ppc_ppr,
+                      int size)
 {
   char *note_name = "LINUX";
   return elfcore_write_note (abfd, buf, bufsiz,
-                             note_name, NT_PPC_PPR, ppc_ppr, size);
+                            note_name, NT_PPC_PPR, ppc_ppr, size);
 }
 
 char *
 elfcore_write_ppc_dscr (bfd *abfd,
-                        char *buf,
-                        int *bufsiz,
-                        const void *ppc_dscr,
-                        int size)
+                       char *buf,
+                       int *bufsiz,
+                       const void *ppc_dscr,
+                       int size)
 {
   char *note_name = "LINUX";
   return elfcore_write_note (abfd, buf, bufsiz,
-                             note_name, NT_PPC_DSCR, ppc_dscr, size);
+                            note_name, NT_PPC_DSCR, ppc_dscr, size);
 }
 
 char *
 elfcore_write_ppc_ebb (bfd *abfd,
-                       char *buf,
-                       int *bufsiz,
-                       const void *ppc_ebb,
-                       int size)
+                      char *buf,
+                      int *bufsiz,
+                      const void *ppc_ebb,
+                      int size)
 {
   char *note_name = "LINUX";
   return elfcore_write_note (abfd, buf, bufsiz,
-                             note_name, NT_PPC_EBB, ppc_ebb, size);
+                            note_name, NT_PPC_EBB, ppc_ebb, size);
 }
 
 char *
 elfcore_write_ppc_pmu (bfd *abfd,
-                       char *buf,
-                       int *bufsiz,
-                       const void *ppc_pmu,
-                       int size)
+                      char *buf,
+                      int *bufsiz,
+                      const void *ppc_pmu,
+                      int size)
 {
   char *note_name = "LINUX";
   return elfcore_write_note (abfd, buf, bufsiz,
-                             note_name, NT_PPC_PMU, ppc_pmu, size);
+                            note_name, NT_PPC_PMU, ppc_pmu, size);
 }
 
 char *
 elfcore_write_ppc_tm_cgpr (bfd *abfd,
-                           char *buf,
-                           int *bufsiz,
-                           const void *ppc_tm_cgpr,
-                           int size)
+                          char *buf,
+                          int *bufsiz,
+                          const void *ppc_tm_cgpr,
+                          int size)
 {
   char *note_name = "LINUX";
   return elfcore_write_note (abfd, buf, bufsiz,
-                             note_name, NT_PPC_TM_CGPR, ppc_tm_cgpr, size);
+                            note_name, NT_PPC_TM_CGPR, ppc_tm_cgpr, size);
 }
 
 char *
 elfcore_write_ppc_tm_cfpr (bfd *abfd,
-                           char *buf,
-                           int *bufsiz,
-                           const void *ppc_tm_cfpr,
-                           int size)
+                          char *buf,
+                          int *bufsiz,
+                          const void *ppc_tm_cfpr,
+                          int size)
 {
   char *note_name = "LINUX";
   return elfcore_write_note (abfd, buf, bufsiz,
-                             note_name, NT_PPC_TM_CFPR, ppc_tm_cfpr, size);
+                            note_name, NT_PPC_TM_CFPR, ppc_tm_cfpr, size);
 }
 
 char *
 elfcore_write_ppc_tm_cvmx (bfd *abfd,
-                           char *buf,
-                           int *bufsiz,
-                           const void *ppc_tm_cvmx,
-                           int size)
+                          char *buf,
+                          int *bufsiz,
+                          const void *ppc_tm_cvmx,
+                          int size)
 {
   char *note_name = "LINUX";
   return elfcore_write_note (abfd, buf, bufsiz,
-                             note_name, NT_PPC_TM_CVMX, ppc_tm_cvmx, size);
+                            note_name, NT_PPC_TM_CVMX, ppc_tm_cvmx, size);
 }
 
 char *
 elfcore_write_ppc_tm_cvsx (bfd *abfd,
-                           char *buf,
-                           int *bufsiz,
-                           const void *ppc_tm_cvsx,
-                           int size)
+                          char *buf,
+                          int *bufsiz,
+                          const void *ppc_tm_cvsx,
+                          int size)
 {
   char *note_name = "LINUX";
   return elfcore_write_note (abfd, buf, bufsiz,
-                             note_name, NT_PPC_TM_CVSX, ppc_tm_cvsx, size);
+                            note_name, NT_PPC_TM_CVSX, ppc_tm_cvsx, size);
 }
 
 char *
 elfcore_write_ppc_tm_spr (bfd *abfd,
-                          char *buf,
-                          int *bufsiz,
-                          const void *ppc_tm_spr,
-                          int size)
+                         char *buf,
+                         int *bufsiz,
+                         const void *ppc_tm_spr,
+                         int size)
 {
   char *note_name = "LINUX";
   return elfcore_write_note (abfd, buf, bufsiz,
-                             note_name, NT_PPC_TM_SPR, ppc_tm_spr, size);
+                            note_name, NT_PPC_TM_SPR, ppc_tm_spr, size);
 }
 
 char *
 elfcore_write_ppc_tm_ctar (bfd *abfd,
-                           char *buf,
-                           int *bufsiz,
-                           const void *ppc_tm_ctar,
-                           int size)
+                          char *buf,
+                          int *bufsiz,
+                          const void *ppc_tm_ctar,
+                          int size)
 {
   char *note_name = "LINUX";
   return elfcore_write_note (abfd, buf, bufsiz,
-                             note_name, NT_PPC_TM_CTAR, ppc_tm_ctar, size);
+                            note_name, NT_PPC_TM_CTAR, ppc_tm_ctar, size);
 }
 
 char *
 elfcore_write_ppc_tm_cppr (bfd *abfd,
-                           char *buf,
-                           int *bufsiz,
-                           const void *ppc_tm_cppr,
-                           int size)
+                          char *buf,
+                          int *bufsiz,
+                          const void *ppc_tm_cppr,
+                          int size)
 {
   char *note_name = "LINUX";
   return elfcore_write_note (abfd, buf, bufsiz,
-                             note_name, NT_PPC_TM_CPPR, ppc_tm_cppr, size);
+                            note_name, NT_PPC_TM_CPPR, ppc_tm_cppr, size);
 }
 
 char *
 elfcore_write_ppc_tm_cdscr (bfd *abfd,
-                            char *buf,
-                            int *bufsiz,
-                            const void *ppc_tm_cdscr,
-                            int size)
+                           char *buf,
+                           int *bufsiz,
+                           const void *ppc_tm_cdscr,
+                           int size)
 {
   char *note_name = "LINUX";
   return elfcore_write_note (abfd, buf, bufsiz,
-                             note_name, NT_PPC_TM_CDSCR, ppc_tm_cdscr, size);
+                            note_name, NT_PPC_TM_CDSCR, ppc_tm_cdscr, size);
 }
 
 static char *
@@ -11494,6 +11523,18 @@ elfcore_write_aarch_sve (bfd *abfd,
                             note_name, NT_ARM_SVE, aarch_sve, size);
 }
 
+char *
+elfcore_write_aarch_pauth (bfd *abfd,
+                          char *buf,
+                          int *bufsiz,
+                          const void *aarch_pauth,
+                          int size)
+{
+  char *note_name = "LINUX";
+  return elfcore_write_note (abfd, buf, bufsiz,
+                            note_name, NT_ARM_PAC_MASK, aarch_pauth, size);
+}
+
 char *
 elfcore_write_register_note (bfd *abfd,
                             char *buf,
@@ -11574,6 +11615,8 @@ elfcore_write_register_note (bfd *abfd,
     return elfcore_write_aarch_hw_watch (abfd, buf, bufsiz, data, size);
   if (strcmp (section, ".reg-aarch-sve") == 0)
     return elfcore_write_aarch_sve (abfd, buf, bufsiz, data, size);
+  if (strcmp (section, ".reg-aarch-pauth") == 0)
+    return elfcore_write_aarch_pauth (abfd, buf, bufsiz, data, size);
   return NULL;
 }
 
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