From 1737c64030af533c520dd1ed1ec2787302cdf830 Mon Sep 17 00:00:00 2001 From: Andrew Burgess Date: Wed, 28 Dec 2016 13:22:44 +0000 Subject: [PATCH] objdump: Better objdump section headers in wide mode When displaying the section headers table using objdump (-h), the column containing the section header name is currently fixed at 13 characters. A section name that is longer than 13 characters will overflow the column causing the table to become miss-aligned. In this commit I change the behaviour so that _in wide mode_ (-w -h) the section name column is dynamically resized to fit the longest section name we plan to display. In wide mode the column still retains a minimum width of 13 characters. In non-wide more the behaviour is completely unchanged. While I was changing the dump_headers function I have unified the two printf lines that handled the different address widths into a single printf, the address width is now passed into printf using the '*' field width format character. binutils/ChangeLog: * objdump.c (dump_section_header): Extract max section name length from data parameter, use this when formatting output. (find_longest_section_name): New function. (dump_headers): Calculate longest section name when in wide mode, reformat to unify printing of header line. ld/ChangeLog: * testsuite/ld-elf/eh-frame-hdr.d: Update expected results. --- binutils/ChangeLog | 8 +++++ binutils/objdump.c | 54 +++++++++++++++++++++++++----- ld/ChangeLog | 4 +++ ld/testsuite/ld-elf/eh-frame-hdr.d | 2 +- 4 files changed, 59 insertions(+), 9 deletions(-) diff --git a/binutils/ChangeLog b/binutils/ChangeLog index 5fdec0f9992..f460516a7e0 100644 --- a/binutils/ChangeLog +++ b/binutils/ChangeLog @@ -1,3 +1,11 @@ +2017-01-20 Andrew Burgess + + * objdump.c (dump_section_header): Extract max section name length + from data parameter, use this when formatting output. + (find_longest_section_name): New function. + (dump_headers): Calculate longest section name when in wide mode, + reformat to unify printing of header line. + 2017-01-18 Bernhard Rosenkranzer PR 21059 diff --git a/binutils/objdump.c b/binutils/objdump.c index c03dfc5f25e..b9fecefca5a 100644 --- a/binutils/objdump.c +++ b/binutils/objdump.c @@ -438,11 +438,11 @@ free_only_list (void) static void -dump_section_header (bfd *abfd, asection *section, - void *ignored ATTRIBUTE_UNUSED) +dump_section_header (bfd *abfd, asection *section, void *data) { char *comma = ""; unsigned int opb = bfd_octets_per_byte (abfd); + int longest_section_name = *((int *) data); /* Ignore linker created section. See elfNN_ia64_object_p in bfd/elfxx-ia64.c. */ @@ -453,7 +453,7 @@ dump_section_header (bfd *abfd, asection *section, if (! process_section_p (section)) return; - printf ("%3d %-13s %08lx ", section->index, + printf ("%3d %-*s %08lx ", section->index, longest_section_name, bfd_get_section_name (abfd, section), (unsigned long) bfd_section_size (abfd, section) / opb); bfd_printf_vma (abfd, bfd_get_section_vma (abfd, section)); @@ -536,26 +536,64 @@ dump_section_header (bfd *abfd, asection *section, #undef PF } +/* Called on each SECTION in ABFD, update the int variable pointed to by + DATA which contains the string length of the longest section name. */ + +static void +find_longest_section_name (bfd *abfd, asection *section, void *data) +{ + int *longest_so_far = (int *) data; + const char *name; + int len; + + /* Ignore linker created section. */ + if (section->flags & SEC_LINKER_CREATED) + return; + + /* Skip sections that we are ignoring. */ + if (! process_section_p (section)) + return; + + name = bfd_get_section_name (abfd, section); + len = (int) strlen (name); + if (len > *longest_so_far) + *longest_so_far = len; +} + static void dump_headers (bfd *abfd) { - printf (_("Sections:\n")); + /* The default width of 13 is just an arbitrary choice. */ + int max_section_name_length = 13; + int bfd_vma_width; #ifndef BFD64 - printf (_("Idx Name Size VMA LMA File off Algn")); + bfd_vma_width = 10; #else /* With BFD64, non-ELF returns -1 and wants always 64 bit addresses. */ if (bfd_get_arch_size (abfd) == 32) - printf (_("Idx Name Size VMA LMA File off Algn")); + bfd_vma_width = 10; else - printf (_("Idx Name Size VMA LMA File off Algn")); + bfd_vma_width = 18; #endif + printf (_("Sections:\n")); + + if (wide_output) + bfd_map_over_sections (abfd, find_longest_section_name, + &max_section_name_length); + + printf (_("Idx %-*s Size %-*s%-*sFile off Algn"), + max_section_name_length, "Name", + bfd_vma_width, "VMA", + bfd_vma_width, "LMA"); + if (wide_output) printf (_(" Flags")); printf ("\n"); - bfd_map_over_sections (abfd, dump_section_header, NULL); + bfd_map_over_sections (abfd, dump_section_header, + &max_section_name_length); } static asymbol ** diff --git a/ld/ChangeLog b/ld/ChangeLog index 37224a0bb6c..6e77d001536 100644 --- a/ld/ChangeLog +++ b/ld/ChangeLog @@ -1,3 +1,7 @@ +2017-01-20 Andrew Burgess + + * testsuite/ld-elf/eh-frame-hdr.d: Update expected results. + 2017-01-18 Maciej W. Rozycki PR ld/20995 diff --git a/ld/testsuite/ld-elf/eh-frame-hdr.d b/ld/testsuite/ld-elf/eh-frame-hdr.d index a76ac738662..08b12d865f2 100644 --- a/ld/testsuite/ld-elf/eh-frame-hdr.d +++ b/ld/testsuite/ld-elf/eh-frame-hdr.d @@ -5,5 +5,5 @@ #xfail: avr*-*-* or1k*-*-elf or1k*-*-rtems* pru-*-* visium-*-* # These targets support CFI generation but not shared libraries. #... - [0-9] .eh_frame_hdr 0*[12][048c] .* + [0-9] .eh_frame_hdr +0*[12][048c] .* #pass -- 2.30.2