From e416bd75c3fd471c1e0222a72b17f6c585b37e93 Mon Sep 17 00:00:00 2001 From: Alan Modra Date: Mon, 7 Aug 2023 20:59:08 +0930 Subject: warn unused result for bfd IO functions This patch fixes all the warnings I found in bfd, binutils and ld, plus some bitrotted COFF_GO32 code that tried to allocate -168ul bytes. When the malloc fail was reported these testsuite fails resulted: i386-go32 +FAIL: go32 stub i386-go32 +ERROR: tcl error sourcing /home/alan/src/binutils-gdb/ld/testsuite/ld-i386/i386.exp. i386-go32 +ERROR: couldn't open "tmpdir/go32stub": no such file or directory i386-go32 +FAIL: ld-scripts/sane1 i386-go32 +FAIL: ld-scripts/assign-loc i386-go32 +FAIL: ld-scripts/pr18963 This does result in some warnings in gdb which are fixed in a followup patch. bfd/ * bfdio.c (bfd_read, bfd_write): Add ATTRIBUTE_WARN_UNUSED_RESULT. (bfd_tell, bfd_stat, bfd_seek, bfd_mmap): Likewise. * bfd-in2.h: Regenerate. * coff-rs6000.c (xcoff_write_armap_big) Don't ignore bfd_write return value. (xcoff_generate_rtinit): Likewise. Also free data_buffer and string_table before returning. * coff64-rs6000.c (xcoff64_generate_rtinit): Likewise. * coff-stgo32.c (go32exe_check_format): Don't ignore bfd_seek return value. * coffcode.h (coff_apply_checksum): Don't ignore bfd_write return. (coff_write_object_contents ): Likewise, and bfd_malloc. Fix bitrotted code to look for first section with non-zero filepos. * elf64-ia64-vms.c (elf64_vms_write_shdrs_and_ehdr): Don't ignore bfd_seek or bfd_write return values. * pef.c (bfd_pef_scan_section): Likewise. (bfd_pef_read_header, bfd_pef_xlib_read_header): Likewise. * vms-misc.c (_bfd_vms_output_end): Likewise. Return status. * vms.h (_bfd_vms_output_end): Update prototype. * vms-alpha.c: Pass _bfd_vms_output_end status up call chains. * wasm-module.c (wasm_compute_custom_section_file_position): Don't ignore bfd_seek or bfd_write return values. (wasm_compute_section_file_positions): Likewise. * xsym.c (bfd_sym_scan): Don't ignore bfd_seek return value. (bfd_sym_read_name_table): Likewise. binutils/ * ar.c (print_contents, extract_file): Don't ignore bfd_seek return value. ld/ * pdb.c (create_section_contrib_substream): Don't ignore bfd_seek return value. (create_section_header_stream): Likewise. * pe-dll.c (pe_get16, pe_get32): Add fail param to return results from bfd_seek and bfd_read. (pe_implied_import_dll): Handle these fails, and other bfd_seek and bfd_read return values. --- binutils/ar.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) (limited to 'binutils') diff --git a/binutils/ar.c b/binutils/ar.c index 97bf34b..fe2d971 100644 --- a/binutils/ar.c +++ b/binutils/ar.c @@ -1078,7 +1078,8 @@ print_contents (bfd *abfd) if (verbose) printf ("\n<%s>\n\n", bfd_get_filename (abfd)); - bfd_seek (abfd, 0, SEEK_SET); + if (bfd_seek (abfd, 0, SEEK_SET) != 0) + bfd_fatal (bfd_get_filename (abfd)); size = buf.st_size; while (ncopied < size) @@ -1176,7 +1177,8 @@ extract_file (bfd *abfd) fatal (_("internal stat error on %s"), bfd_get_filename (abfd)); size = buf.st_size; - bfd_seek (abfd, 0, SEEK_SET); + if (bfd_seek (abfd, 0, SEEK_SET) != 0) + bfd_fatal (bfd_get_filename (abfd)); output_file = NULL; if (size == 0) -- cgit v1.1