echo 'main(){pause();}' | gcc -x c - -g gdb -nx ./a.out GNU gdb (GDB) 7.2.50.20110311-cvs This GDB was configured as "x86_64-unknown-linux-gnu". (gdb) b 'pause@plt' Breakpoint 1 at 0x4003a0 (gdb) run (gdb) stepi 2 (gdb) disass Dump of assembler code for function pause@plt: 0x00000000004003a0 <+0>: jmpq *0x200482(%rip) 0x00000000004003a6 <+6>: pushq $0x0 => 0x00000000004003ab <+11>: jmpq 0x400390 End of assembler dump. (gdb) bt #0 0x00000000004003ab in pause@plt () #1 0x0000000000000000 in ?? () .plt needs associated .eh_frame/.debug_frame entries. GDB could workaround it but it affects also oprofile, probably systemtap etc.
RFC: Unwind info for PLT http://sourceware.org/ml/gdb/2011-06/msg00064.html From: Jakub Jelinek
CVSROOT: /cvs/src Module name: src Changes by: jakub@sourceware.org 2011-06-20 13:18:52 Modified files: bfd : ChangeLog elf-eh-frame.c elf32-i386.c elf64-x86-64.c include : ChangeLog bfdlink.h ld : ChangeLog ld.texinfo ld/emultempl : elf32.em ld/testsuite : ChangeLog ld/testsuite/ld-i386: i386.exp tlsbin.dd tlsbin.rd tlsbin.sd tlsbin.td tlsbindesc.dd tlsbindesc.rd tlsbindesc.sd tlsbindesc.td tlsdesc.dd tlsdesc.rd tlsdesc.sd tlsdesc.td tlsgdesc.dd tlsgdesc.rd tlsnopic.dd tlsnopic.rd tlsnopic.sd tlspic.dd tlspic.rd tlspic.sd tlspic.td ld/testsuite/ld-x86-64: ilp32-4.d tlsbin.dd tlsbin.rd tlsbin.sd tlsbin.td tlsbindesc.dd tlsbindesc.rd tlsbindesc.sd tlsbindesc.td tlsdesc.dd tlsdesc.pd tlsdesc.rd tlsdesc.sd tlsdesc.td tlsgd5.dd tlsgd6.dd tlsgdesc.dd tlsgdesc.rd tlspic.dd tlspic.rd tlspic.sd tlspic.td x86-64.exp Log message: PR ld/12570 include/ * bfdlink.h (struct bfd_link_info): Add no_ld_generated_unwind_info option. ld/ * emultempl/elf32.em (OPTION_LD_GENERATED_UNWIND_INFO, OPTION_NO_LD_GENERATED_UNWIND_INFO): Define. (gld${EMULATION_NAME}_handle_option): Handle --ld-generated-unwind-info and --no-ld-generated-unwind-info. * ld.texinfo (--ld-generated-unwind-info, --no-ld-generated-unwind-info): Document. bfd/ * elf-eh-frame.c (_bfd_elf_parse_eh_frame): Allow no relocations at all for linker created .eh_frame sections. (_bfd_elf_discard_section_eh_frame): Handle linker created .eh_frame sections with no relocations. * elf64-x86-64.c: Include dwarf2.h. (elf_x86_64_eh_frame_plt): New variable. (PLT_CIE_LENGTH, PLT_FDE_LENGTH, PLT_FDE_START_OFFSET, PLT_FDE_LEN_OFFSET): Define. (struct elf_x86_64_link_hash_table): Add plt_eh_frame field. (elf_x86_64_create_dynamic_sections): Create and fill in .eh_frame section for .plt section. (elf_x86_64_size_dynamic_sections): Write .plt section size into .eh_frame FDE covering .plt section. (elf_x86_64_finish_dynamic_sections): Write .plt section start into .eh_frame FDE covering .plt section. Call _bfd_elf_write_section_eh_frame on htab->plt_eh_frame section. (elf_backend_plt_alignment): Define to 4. * elf32-i386.c: Include dwarf2.h. (elf_i386_eh_frame_plt): New variable. (PLT_CIE_LENGTH, PLT_FDE_LENGTH, PLT_FDE_START_OFFSET, PLT_FDE_LEN_OFFSET): Define. (struct elf_i386_link_hash_table): Add plt_eh_frame field. (elf_i386_create_dynamic_sections): Create and fill in .eh_frame section for .plt section. (elf_i386_size_dynamic_sections): Write .plt section size into .eh_frame FDE covering .plt section. (elf_i386_finish_dynamic_sections): Write .plt section start into .eh_frame FDE covering .plt section. Call _bfd_elf_write_section_eh_frame on htab->plt_eh_frame section. (elf_backend_plt_alignment): Define to 4. ld/testsuite/ * ld-x86-64/x86-64.exp: Link some testcases with --no-ld-generated-unwind-info. * ld-x86-64/tlsbin.rd: Add --no-ld-generated-unwind-info to ld comment. * ld-x86-64/tlsdesc.dd: Likewise. * ld-x86-64/tlspic.dd: Likewise. * ld-x86-64/tlsdesc.sd: Likewise. * ld-x86-64/tlspic.rd: Likewise. * ld-x86-64/tlsbindesc.rd: Likewise. * ld-x86-64/tlsbindesc.sd: Likewise. * ld-x86-64/tlsbin.td: Likewise. * ld-x86-64/tlsdesc.pd: Likewise. * ld-x86-64/tlsdesc.td: Likewise. * ld-x86-64/tlsbindesc.dd: Likewise. * ld-x86-64/tlsbin.dd: Likewise. * ld-x86-64/tlsgdesc.rd: Likewise. * ld-x86-64/tlspic.sd: Likewise. * ld-x86-64/tlsbindesc.td: Likewise. * ld-x86-64/tlspic.td: Likewise. * ld-x86-64/tlsbin.sd: Likewise. * ld-x86-64/ilp32-4.d: Likewise. * ld-x86-64/tlsgdesc.dd: Add --no-ld-generated-unwind-info to ld comment. Adjust. * ld-x86-64/tlsdesc.rd: Likewise. * ld-x86-64/tlsgd6.dd: Adjust. * ld-x86-64/tlsgd5.dd: Likewise. * ld-i386/i386.exp: Link some testcases with --no-ld-generated-unwind-info. * ld-i386/tlsbin.rd: Add --no-ld-generated-unwind-info to ld comment.. * ld-i386/tlsdesc.dd: Likewise. * ld-i386/tlspic.dd: Likewise. * ld-i386/tlsdesc.sd: Likewise. * ld-i386/tlsgdesc.dd: Likewise. * ld-i386/tlsnopic.sd: Likewise. * ld-i386/tlspic.rd: Likewise. * ld-i386/tlsdesc.rd: Likewise. * ld-i386/tlsbindesc.rd: Likewise. * ld-i386/tlsbindesc.sd: Likewise. * ld-i386/tlsbin.td: Likewise. * ld-i386/tlsdesc.td: Likewise. * ld-i386/tlsnopic.dd: Likewise. * ld-i386/tlsbindesc.dd: Likewise. * ld-i386/tlsbin.dd: Likewise. * ld-i386/tlsgdesc.rd: Likewise. * ld-i386/tlspic.sd: Likewise. * ld-i386/tlsnopic.rd: Likewise. * ld-i386/tlsbindesc.td: Likewise. * ld-i386/tlspic.td: Likewise. * ld-i386/tlsbin.sd: Likewise. Patches: http://sourceware.org/cgi-bin/cvsweb.cgi/src/bfd/ChangeLog.diff?cvsroot=src&r1=1.5394&r2=1.5395 http://sourceware.org/cgi-bin/cvsweb.cgi/src/bfd/elf-eh-frame.c.diff?cvsroot=src&r1=1.86&r2=1.87 http://sourceware.org/cgi-bin/cvsweb.cgi/src/bfd/elf32-i386.c.diff?cvsroot=src&r1=1.254&r2=1.255 http://sourceware.org/cgi-bin/cvsweb.cgi/src/bfd/elf64-x86-64.c.diff?cvsroot=src&r1=1.232&r2=1.233 http://sourceware.org/cgi-bin/cvsweb.cgi/src/include/ChangeLog.diff?cvsroot=src&r1=1.537&r2=1.538 http://sourceware.org/cgi-bin/cvsweb.cgi/src/include/bfdlink.h.diff?cvsroot=src&r1=1.87&r2=1.88 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/ChangeLog.diff?cvsroot=src&r1=1.2348&r2=1.2349 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/ld.texinfo.diff?cvsroot=src&r1=1.275&r2=1.276 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/emultempl/elf32.em.diff?cvsroot=src&r1=1.219&r2=1.220 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ChangeLog.diff?cvsroot=src&r1=1.1429&r2=1.1430 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-i386/i386.exp.diff?cvsroot=src&r1=1.38&r2=1.39 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-i386/tlsbin.dd.diff?cvsroot=src&r1=1.8&r2=1.9 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-i386/tlsbin.rd.diff?cvsroot=src&r1=1.15&r2=1.16 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-i386/tlsbin.sd.diff?cvsroot=src&r1=1.2&r2=1.3 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-i386/tlsbin.td.diff?cvsroot=src&r1=1.1&r2=1.2 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-i386/tlsbindesc.dd.diff?cvsroot=src&r1=1.4&r2=1.5 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-i386/tlsbindesc.rd.diff?cvsroot=src&r1=1.9&r2=1.10 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-i386/tlsbindesc.sd.diff?cvsroot=src&r1=1.1&r2=1.2 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-i386/tlsbindesc.td.diff?cvsroot=src&r1=1.1&r2=1.2 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-i386/tlsdesc.dd.diff?cvsroot=src&r1=1.3&r2=1.4 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-i386/tlsdesc.rd.diff?cvsroot=src&r1=1.8&r2=1.9 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-i386/tlsdesc.sd.diff?cvsroot=src&r1=1.2&r2=1.3 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-i386/tlsdesc.td.diff?cvsroot=src&r1=1.1&r2=1.2 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-i386/tlsgdesc.dd.diff?cvsroot=src&r1=1.3&r2=1.4 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-i386/tlsgdesc.rd.diff?cvsroot=src&r1=1.6&r2=1.7 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-i386/tlsnopic.dd.diff?cvsroot=src&r1=1.4&r2=1.5 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-i386/tlsnopic.rd.diff?cvsroot=src&r1=1.15&r2=1.16 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-i386/tlsnopic.sd.diff?cvsroot=src&r1=1.3&r2=1.4 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-i386/tlspic.dd.diff?cvsroot=src&r1=1.4&r2=1.5 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-i386/tlspic.rd.diff?cvsroot=src&r1=1.14&r2=1.15 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-i386/tlspic.sd.diff?cvsroot=src&r1=1.2&r2=1.3 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-i386/tlspic.td.diff?cvsroot=src&r1=1.1&r2=1.2 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-x86-64/ilp32-4.d.diff?cvsroot=src&r1=1.3&r2=1.4 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-x86-64/tlsbin.dd.diff?cvsroot=src&r1=1.7&r2=1.8 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-x86-64/tlsbin.rd.diff?cvsroot=src&r1=1.15&r2=1.16 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-x86-64/tlsbin.sd.diff?cvsroot=src&r1=1.4&r2=1.5 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-x86-64/tlsbin.td.diff?cvsroot=src&r1=1.4&r2=1.5 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-x86-64/tlsbindesc.dd.diff?cvsroot=src&r1=1.6&r2=1.7 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-x86-64/tlsbindesc.rd.diff?cvsroot=src&r1=1.10&r2=1.11 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-x86-64/tlsbindesc.sd.diff?cvsroot=src&r1=1.3&r2=1.4 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-x86-64/tlsbindesc.td.diff?cvsroot=src&r1=1.3&r2=1.4 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-x86-64/tlsdesc.dd.diff?cvsroot=src&r1=1.4&r2=1.5 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-x86-64/tlsdesc.pd.diff?cvsroot=src&r1=1.4&r2=1.5 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-x86-64/tlsdesc.rd.diff?cvsroot=src&r1=1.9&r2=1.10 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-x86-64/tlsdesc.sd.diff?cvsroot=src&r1=1.2&r2=1.3 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-x86-64/tlsdesc.td.diff?cvsroot=src&r1=1.2&r2=1.3 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-x86-64/tlsgd5.dd.diff?cvsroot=src&r1=1.1&r2=1.2 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-x86-64/tlsgd6.dd.diff?cvsroot=src&r1=1.1&r2=1.2 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-x86-64/tlsgdesc.dd.diff?cvsroot=src&r1=1.5&r2=1.6 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-x86-64/tlsgdesc.rd.diff?cvsroot=src&r1=1.5&r2=1.6 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-x86-64/tlspic.dd.diff?cvsroot=src&r1=1.10&r2=1.11 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-x86-64/tlspic.rd.diff?cvsroot=src&r1=1.15&r2=1.16 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-x86-64/tlspic.sd.diff?cvsroot=src&r1=1.3&r2=1.4 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-x86-64/tlspic.td.diff?cvsroot=src&r1=1.3&r2=1.4 http://sourceware.org/cgi-bin/cvsweb.cgi/src/ld/testsuite/ld-x86-64/x86-64.exp.diff?cvsroot=src&r1=1.33&r2=1.34
I find it fixed now, thanks! #0 0x00000000004003c3 in pause@plt () #1 0x0000000000000000 in ?? () -> #0 0x00000000004003db in pause@plt () #1 0x00000000004004d2 in main () at <stdin>:1