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When running test-case gdb.dwarf2/dw2-dir-file-name.exp on x86_64-linux, we have: ... (gdb) break compdir_missing__ldir_missing__file_basename^M Breakpoint 2 at 0x4004c4: file tmp-dw2-dir-file-name.c, line 999.^M (gdb) continue^M Continuing.^M ^M Breakpoint 2, 0x00000000004004c4 in \ compdir_missing__ldir_missing__file_basename () \ at tmp-dw2-dir-file-name.c:999^M (gdb) PASS: gdb.dwarf2/dw2-dir-file-name.exp: \ compdir_missing__ldir_missing__file_basename: continue to breakpoint: \ compdir_missing__ldir_missing__file_basename ... When trying to set a breakpoint on compdir_missing__ldir_missing__file_basename, the architecture-specific prologue skipper starts at 0x4004c0 and skips past two insns, to 0x4004c4: ... 00000000004004c0 <compdir_missing__ldir_missing__file_basename>: 4004c0: 55 push %rbp 4004c1: 48 89 e5 mov %rsp,%rbp 4004c4: 8b 05 72 1b 20 00 mov 0x201b72(%rip),%eax # 60203c <v> 4004ca: 83 c0 01 add $0x1,%eax 4004cd: 89 05 69 1b 20 00 mov %eax,0x201b69(%rip) # 60203c <v> 4004d3: 90 nop 4004d4: 5d pop %rbp 4004d5: c3 ret ... And because the line table info is rudamentary: ... CU: tmp-dw2-dir-file-name.c: File name Line number Starting address View Stmt tmp-dw2-dir-file-name.c 999 0x4004c0 x tmp-dw2-dir-file-name.c 1000 0x4004d6 x tmp-dw2-dir-file-name.c - 0x4004d6 ... the address does not fall at an actual line, so the breakpoint is shown with address, both when setting it and hitting it. when running the test-case with aarch64-linux, we have similarly: ... (gdb) break compdir_missing__ldir_missing__file_basename^M Breakpoint 2 at 0x400618: file tmp-dw2-dir-file-name.c, line 999.^M ... due to the architecture-specific prologue skipper starting at 0x400610 and skipping past two insns, to 0x400618: ... 0000000000400610 <compdir_missing__ldir_missing__file_basename>: 400610: 90000100 adrp x0, 420000 <__libc_start_main@GLIBC_2.17> 400614: 9100b000 add x0, x0, #0x2c 400618: b9400000 ldr w0, [x0] 40061c: 11000401 add w1, w0, #0x1 400620: 90000100 adrp x0, 420000 <__libc_start_main@GLIBC_2.17> 400624: 9100b000 add x0, x0, #0x2c 400628: b9000001 str w1, [x0] 40062c: d503201f nop 400630: d65f03c0 ret ... But interestingly, the aarch64 architecture-specific prologue skipper is wrong. There is no prologue, and the breakpoint should be set at 0x400610. By using "break *compdir_missing__ldir_missing__file_basename" we can get the breakpoint set at 0x400610: ... (gdb) break *compdir_missing__ldir_missing__file_basename^M Breakpoint 2 at 0x400610: file tmp-dw2-dir-file-name.c, line 999.^M ... and make the test-case independent of prologue analysis. This requires us to update the expected patterns. The fix ensures that once the aarch64 architecture-specific prologue skipper will be fixed, this test-case won't start failing. Tested on x86_64-linux.
README for GNU development tools This directory contains various GNU compilers, assemblers, linkers, debuggers, etc., plus their support routines, definitions, and documentation. If you are receiving this as part of a GDB release, see the file gdb/README. If with a binutils release, see binutils/README; if with a libg++ release, see libg++/README, etc. That'll give you info about this package -- supported targets, how to use it, how to report bugs, etc. It is now possible to automatically configure and build a variety of tools with one command. To build all of the tools contained herein, run the ``configure'' script here, e.g.: ./configure make To install them (by default in /usr/local/bin, /usr/local/lib, etc), then do: make install (If the configure script can't determine your type of computer, give it the name as an argument, for instance ``./configure sun4''. You can use the script ``config.sub'' to test whether a name is recognized; if it is, config.sub translates it to a triplet specifying CPU, vendor, and OS.) If you have more than one compiler on your system, it is often best to explicitly set CC in the environment before running configure, and to also set CC when running make. For example (assuming sh/bash/ksh): CC=gcc ./configure make A similar example using csh: setenv CC gcc ./configure make Much of the code and documentation enclosed is copyright by the Free Software Foundation, Inc. See the file COPYING or COPYING.LIB in the various directories, for a description of the GNU General Public License terms under which you can copy the files. REPORTING BUGS: Again, see gdb/README, binutils/README, etc., for info on where and how to report problems.