Use gdb_bfd_sections in ELF osabi tag sniffing

This changes some ELF osabi tag-sniffing functions to avoid
bfd_map_over_sections, in favor of iteration.  I could only readily
test the generic one.

gdb/ChangeLog
2020-09-19  Tom Tromey  <tom@tromey.com>

	* osabi.h (generic_elf_osabi_sniff_abi_tag_sections): Update.
	* osabi.c (generic_elf_osabi_sniff_abi_tag_sections): Change
	parameters.
	(generic_elf_osabi_sniffer): Use foreach.
	* mips-sde-tdep.c (mips_sde_elf_osabi_sniffer): Use foreach.
	* arm-tdep.c (arm_elf_osabi_sniffer): Use foreach.

5 files changed, 23 insertions, 14 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index dab34bf..1fb3c88 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,14 @@
 2020-09-19  Tom Tromey  <tom@tromey.com>
 
+	* osabi.h (generic_elf_osabi_sniff_abi_tag_sections): Update.
+	* osabi.c (generic_elf_osabi_sniff_abi_tag_sections): Change
+	parameters.
+	(generic_elf_osabi_sniffer): Use foreach.
+	* mips-sde-tdep.c (mips_sde_elf_osabi_sniffer): Use foreach.
+	* arm-tdep.c (arm_elf_osabi_sniffer): Use foreach.
+
+2020-09-19  Tom Tromey  <tom@tromey.com>
+
 	* dwarf2/read.c (locate_dwz_sections): Change parameters.
 	(dwarf2_get_dwz_file): Use foreach.
 	(dwarf2_locate_dwo_sections): Change parameters.
diff --git a/gdb/arm-tdep.c b/gdb/arm-tdep.c
index 23da42f..91ab441 100644
--- a/gdb/arm-tdep.c
+++ b/gdb/arm-tdep.c
@@ -8863,9 +8863,10 @@ arm_elf_osabi_sniffer (bfd *abfd)
   if (elfosabi == ELFOSABI_ARM)
     /* GNU tools use this value.  Check note sections in this case,
        as well.  */
-    bfd_map_over_sections (abfd,
-			   generic_elf_osabi_sniff_abi_tag_sections, 
-			   &osabi);
+    {
+      for (asection *sect : gdb_bfd_sections (abfd))
+	generic_elf_osabi_sniff_abi_tag_sections (abfd, sect, &osabi);
+    }
 
   /* Anything else will be handled by the generic ELF sniffer.  */
   return osabi;
diff --git a/gdb/mips-sde-tdep.c b/gdb/mips-sde-tdep.c
index 685c3c7..1d282c2 100644
--- a/gdb/mips-sde-tdep.c
+++ b/gdb/mips-sde-tdep.c
@@ -226,9 +226,8 @@ mips_sde_elf_osabi_sniffer (bfd *abfd)
 
   /* If the generic sniffer gets a hit, return and let other sniffers
      get a crack at it.  */
-  bfd_map_over_sections (abfd,
-			 generic_elf_osabi_sniff_abi_tag_sections,
-			 &osabi);
+  for (asection *sect : gdb_bfd_sections (abfd))
+    generic_elf_osabi_sniff_abi_tag_sections (abfd, sect, &osabi);
   if (osabi != GDB_OSABI_UNKNOWN)
     return GDB_OSABI_UNKNOWN;
 
diff --git a/gdb/osabi.c b/gdb/osabi.c
index 627b9d9..e8a813b 100644
--- a/gdb/osabi.c
+++ b/gdb/osabi.c
@@ -23,6 +23,7 @@
 #include "arch-utils.h"
 #include "gdbcmd.h"
 #include "command.h"
+#include "gdb_bfd.h"
 
 #include "elf-bfd.h"
 
@@ -439,9 +440,9 @@ check_note (bfd *abfd, asection *sect, char *note, unsigned int *sectsize,
 /* Generic sniffer for ELF flavoured files.  */
 
 void
-generic_elf_osabi_sniff_abi_tag_sections (bfd *abfd, asection *sect, void *obj)
+generic_elf_osabi_sniff_abi_tag_sections (bfd *abfd, asection *sect,
+					  enum gdb_osabi *osabi)
 {
-  enum gdb_osabi *osabi = (enum gdb_osabi *) obj;
   const char *name;
   unsigned int sectsize;
   char *note;
@@ -561,9 +562,8 @@ generic_elf_osabi_sniffer (bfd *abfd)
       /* And likewise ELFOSABI_HPUX.  For some reason the default
 	 value for the EI_OSABI field is ELFOSABI_HPUX for all PA-RISC
 	 targets (with the exception of GNU/Linux).  */
-      bfd_map_over_sections (abfd,
-			     generic_elf_osabi_sniff_abi_tag_sections,
-			     &osabi);
+      for (asection *sect : gdb_bfd_sections (abfd))
+	generic_elf_osabi_sniff_abi_tag_sections (abfd, sect, &osabi);
       break;
 
     case ELFOSABI_FREEBSD:
diff --git a/gdb/osabi.h b/gdb/osabi.h
index a7e6a10..9b7ab18 100644
--- a/gdb/osabi.h
+++ b/gdb/osabi.h
@@ -86,8 +86,8 @@ const char *gdbarch_osabi_name (enum gdb_osabi);
 const char *osabi_triplet_regexp (enum gdb_osabi osabi);
 
 /* Helper routine for ELF file sniffers.  This looks at ABI tag note
-   sections to determine the OS ABI from the note.  It should be called
-   via bfd_map_over_sections.  */
-void generic_elf_osabi_sniff_abi_tag_sections (bfd *, asection *, void *);
+   sections to determine the OS ABI from the note.  */
+void generic_elf_osabi_sniff_abi_tag_sections (bfd *, asection *,
+					       enum gdb_osabi *);
 
 #endif /* OSABI_H */