From 1a72702bb30ec3f94627cfcae684823b413f20b9 Mon Sep 17 00:00:00 2001 From: Alan Modra Date: Fri, 27 May 2016 17:20:55 +0930 Subject: Return void from linker callbacks The ldmain.c implementation of these linker callback functions always return true, so any code handling a false return is dead. What's more, some of the bfd backends abort if ever a false return is seen, and there seems to be some confusion in gdb's compile-object-load.c. The return value was never meant to be "oh yes, a multiple_definition error occurred", but rather "out of memory or other catastrophic failure". This patch removes the status return on the callbacks that always return true. I kept the return status for "notice" because that one does happen to need to return "out of memory". include/ * bfdlink.h (struct bfd_link_callbacks): Update comments. Return void from multiple_definition, multiple_common, add_to_set, constructor, warning, undefined_symbol, reloc_overflow, reloc_dangerous and unattached_reloc. bfd/ * aoutx.h: Adjust linker callback calls throughout file, removing dead code. * bout.c: Likewise. * coff-alpha.c: Likewise. * coff-arm.c: Likewise. * coff-h8300.c: Likewise. * coff-h8500.c: Likewise. * coff-i960.c: Likewise. * coff-mcore.c: Likewise. * coff-mips.c: Likewise. * coff-ppc.c: Likewise. * coff-rs6000.c: Likewise. * coff-sh.c: Likewise. * coff-tic80.c: Likewise. * coff-w65.c: Likewise. * coff-z80.c: Likewise. * coff-z8k.c: Likewise. * coff64-rs6000.c: Likewise. * cofflink.c: Likewise. * ecoff.c: Likewise. * elf-bfd.h: Likewise. * elf-m10200.c: Likewise. * elf-m10300.c: Likewise. * elf32-arc.c: Likewise. * elf32-arm.c: Likewise. * elf32-avr.c: Likewise. * elf32-bfin.c: Likewise. * elf32-cr16.c: Likewise. * elf32-cr16c.c: Likewise. * elf32-cris.c: Likewise. * elf32-crx.c: Likewise. * elf32-d10v.c: Likewise. * elf32-epiphany.c: Likewise. * elf32-fr30.c: Likewise. * elf32-frv.c: Likewise. * elf32-ft32.c: Likewise. * elf32-h8300.c: Likewise. * elf32-hppa.c: Likewise. * elf32-i370.c: Likewise. * elf32-i386.c: Likewise. * elf32-i860.c: Likewise. * elf32-ip2k.c: Likewise. * elf32-iq2000.c: Likewise. * elf32-lm32.c: Likewise. * elf32-m32c.c: Likewise. * elf32-m32r.c: Likewise. * elf32-m68hc1x.c: Likewise. * elf32-m68k.c: Likewise. * elf32-mep.c: Likewise. * elf32-metag.c: Likewise. * elf32-microblaze.c: Likewise. * elf32-moxie.c: Likewise. * elf32-msp430.c: Likewise. * elf32-mt.c: Likewise. * elf32-nds32.c: Likewise. * elf32-nios2.c: Likewise. * elf32-or1k.c: Likewise. * elf32-ppc.c: Likewise. * elf32-s390.c: Likewise. * elf32-score.c: Likewise. * elf32-score7.c: Likewise. * elf32-sh.c: Likewise. * elf32-sh64.c: Likewise. * elf32-spu.c: Likewise. * elf32-tic6x.c: Likewise. * elf32-tilepro.c: Likewise. * elf32-v850.c: Likewise. * elf32-vax.c: Likewise. * elf32-visium.c: Likewise. * elf32-xstormy16.c: Likewise. * elf32-xtensa.c: Likewise. * elf64-alpha.c: Likewise. * elf64-hppa.c: Likewise. * elf64-ia64-vms.c: Likewise. * elf64-mmix.c: Likewise. * elf64-ppc.c: Likewise. * elf64-s390.c: Likewise. * elf64-sh64.c: Likewise. * elf64-x86-64.c: Likewise. * elflink.c: Likewise. * elfnn-aarch64.c: Likewise. * elfnn-ia64.c: Likewise. * elfxx-mips.c: Likewise. * elfxx-sparc.c: Likewise. * elfxx-tilegx.c: Likewise. * linker.c: Likewise. * pdp11.c: Likewise. * pe-mips.c: Likewise. * reloc.c: Likewise. * reloc16.c: Likewise. * simple.c: Likewise. * vms-alpha.c: Likewise. * xcofflink.c: Likewise. * elf32-rl78.c (get_symbol_value, get_romstart, get_ramstart): Delete status param. Adjust calls to these and linker callbacks throughout. * elf32-rx.c: (get_symbol_value, get_gp, get_romstart, get_ramstart): Delete status param. Adjust calls to these and linker callbacks throughout. ld/ * ldmain.c (multiple_definition, multiple_common, add_to_set, constructor_callback, warning_callback, undefined_symbol, reloc_overflow, reloc_dangerous, unattached_reloc): Return void. * emultempl/elf32.em: Adjust callback calls. gdb/ * compile/compile-object-load.c (link_callbacks_multiple_definition, link_callbacks_warning, link_callbacks_undefined_symbol, link_callbacks_undefined_symbol, link_callbacks_reloc_overflow, link_callbacks_reloc_dangerous, link_callbacks_unattached_reloc): Return void. --- bfd/elflink.c | 44 ++++++++++++++------------------------------ 1 file changed, 14 insertions(+), 30 deletions(-) (limited to 'bfd/elflink.c') diff --git a/bfd/elflink.c b/bfd/elflink.c index b4efd5a..93e7dd2 100644 --- a/bfd/elflink.c +++ b/bfd/elflink.c @@ -1481,10 +1481,8 @@ _bfd_elf_merge_symbol (bfd *abfd, the old symbol override the new one as normally happens with symbols defined in dynamic objects. */ - if (! ((*info->callbacks->multiple_common) - (info, &h->root, abfd, bfd_link_hash_common, sym->st_size))) - return FALSE; - + (*info->callbacks->multiple_common) (info, &h->root, abfd, + bfd_link_hash_common, sym->st_size); if (sym->st_size > h->size) h->size = sym->st_size; @@ -1642,9 +1640,8 @@ _bfd_elf_merge_symbol (bfd *abfd, /* It would be best if we could set the hash table entry to a common symbol, but we don't know what to use for the section or the alignment. */ - if (! ((*info->callbacks->multiple_common) - (info, &h->root, abfd, bfd_link_hash_common, sym->st_size))) - return FALSE; + (*info->callbacks->multiple_common) (info, &h->root, abfd, + bfd_link_hash_common, sym->st_size); /* If the presumed common symbol in the dynamic object is larger, pretend that the new symbol has its size. */ @@ -9235,19 +9232,11 @@ elf_link_output_extsym (struct bfd_hash_entry *bh, void *data) && (!h->ref_regular || flinfo->info->gc_sections) && !elf_link_check_versioned_symbol (flinfo->info, bed, h) && flinfo->info->unresolved_syms_in_shared_libs != RM_IGNORE) - { - if (!(flinfo->info->callbacks->undefined_symbol - (flinfo->info, h->root.root.string, - h->ref_regular ? NULL : h->root.u.undef.abfd, - NULL, 0, - (flinfo->info->unresolved_syms_in_shared_libs - == RM_GENERATE_ERROR)))) - { - bfd_set_error (bfd_error_bad_value); - eoinfo->failed = TRUE; - return FALSE; - } - } + (*flinfo->info->callbacks->undefined_symbol) + (flinfo->info, h->root.root.string, + h->ref_regular ? NULL : h->root.u.undef.abfd, + NULL, 0, + flinfo->info->unresolved_syms_in_shared_libs == RM_GENERATE_ERROR); /* Strip a global symbol defined in a discarded section. */ if (h->indx == -3) @@ -10761,9 +10750,8 @@ elf_reloc_link_order (bfd *output_bfd, } else { - if (! ((*info->callbacks->unattached_reloc) - (info, link_order->u.reloc.p->u.name, NULL, NULL, 0))) - return FALSE; + (*info->callbacks->unattached_reloc) + (info, link_order->u.reloc.p->u.name, NULL, NULL, 0); indx = 0; } } @@ -10798,13 +10786,9 @@ elf_reloc_link_order (bfd *output_bfd, link_order->u.reloc.p->u.section); else sym_name = link_order->u.reloc.p->u.name; - if (! ((*info->callbacks->reloc_overflow) - (info, NULL, sym_name, howto->name, addend, NULL, - NULL, (bfd_vma) 0))) - { - free (buf); - return FALSE; - } + (*info->callbacks->reloc_overflow) (info, NULL, sym_name, + howto->name, addend, NULL, NULL, + (bfd_vma) 0); break; } -- cgit v1.1