[Bug binutils/20946] New: lookup_mach_via_bfd_name aborts

[qiyao at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=20946

            Bug ID: 20946
           Summary: lookup_mach_via_bfd_name aborts
           Product: binutils
           Version: 2.28 (HEAD)
            Status: NEW
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: qiyao at gcc dot gnu.org
  Target Milestone: ---

I configured gdb with all targets enabled "--enable-targets=all
--enable-64-bit-bfd --disable-binutils --disable-gprof --disable-gold
--disable-gas --disable-ld".

If I change arch to "fr300", and do disassembly, lookup_mach_via_bfd_name
aborts.

(gdb) set architecture fr300
The target architecture is assumed to be fr300
(gdb) disassemble 0x0,+4
Dump of assembler code from 0x0 to 0x4:
   0x00000000:  
Program received signal SIGABRT, Aborted.
0x00007ffff63c3cc9 in __GI_raise (address@hidden) at
../nptl/sysdeps/unix/sysv/linux/raise.c:56
56      ../nptl/sysdeps/unix/sysv/linux/raise.c: No such file or directory.
(gdb) bt 20
#0  0x00007ffff63c3cc9 in __GI_raise (address@hidden) at
../nptl/sysdeps/unix/sysv/linux/raise.c:56
#1  0x00007ffff63c70d8 in __GI_abort () at abort.c:89
#2  0x000000000088bbad in lookup_mach_via_bfd_name (table=0x1472ee8
<frv_cgen_mach_table+168>, name=0x17afc51 "fr300")
    at /home/yao/SourceCode/gnu/gdb/git/opcodes/frv-desc.c:6176
#3  0x000000000088c2df in frv_cgen_cpu_open (arg_type=CGEN_CPU_OPEN_BFDMACH) at
/home/yao/SourceCode/gnu/gdb/git/opcodes/frv-desc.c:6387
#4  0x0000000000811c72 in print_insn_frv (pc=0, info=0x7fffffffd940) at
/home/yao/SourceCode/gnu/gdb/git/opcodes/frv-dis.c:784
#5  0x0000000000679e87 in gdb_pretty_print_insn (gdbarch=0x26cb970,
uiout=0x21a2700, di=0x7fffffffd940, insn=0x7fffffffd850, flags=0,
stb=0x26ccef0)
    at /home/yao/SourceCode/gnu/gdb/git/gdb/disasm.c:281
#6  0x000000000067a0ae in dump_insns (gdbarch=0x26cb970, uiout=0x21a2700,
di=0x7fffffffd940, low=0, high=4, how_many=-1, flags=0, stb=0x26ccef0,
end_pc=0x0)
    at /home/yao/SourceCode/gnu/gdb/git/gdb/disasm.c:347
#7  0x000000000067b3d3 in do_assembly_only (gdbarch=0x26cb970, uiout=0x21a2700,
di=0x7fffffffd940, low=0, high=4, how_many=-1, flags=0, stb=0x26ccef0)
    at /home/yao/SourceCode/gnu/gdb/git/gdb/disasm.c:789
#8  0x000000000067b67f in gdb_disassembly (gdbarch=0x26cb970, uiout=0x21a2700,
file_string=0x0, flags=0, how_many=-1, low=0, high=4)
    at /home/yao/SourceCode/gnu/gdb/git/gdb/disasm.c:855
#9  0x00000000005965bb in print_disassembly (gdbarch=0x26cb970, name=<optimised
out>, low=0, high=4, flags=0)
    at /home/yao/SourceCode/gnu/gdb/git/gdb/cli/cli-cmds.c:1151
#10 0x0000000000597516 in print_disassembly (flags=0, high=4, low=0, name=0x0,
gdbarch=0x26cb970) at /home/yao/SourceCode/gnu/gdb/git/gdb/cli/cli-cmds.c:1140
#11 disassemble_command (arg=<optimised out>, from_tty=<optimised out>) at
/home/yao/SourceCode/gnu/gdb/git/gdb/cli/cli-cmds.c:1303
#12 0x000000000059ac33 in cmd_func (cmd=0x20cb600, args=0x26becfc "0x0,+4",
from_tty=1) at /home/yao/SourceCode/gnu/gdb/git/gdb/cli/cli-decode.c:1913
#13 0x000000000078a3f6 in execute_command (p=<optimised out>, address@hidden
"disassemble 0x0,+4", from_tty=1)
    at /home/yao/SourceCode/gnu/gdb/git/gdb/top.c:674
#14 0x00000000006b538c in command_handler (command=0x26becf0 "disassemble
0x0,+4") at /home/yao/SourceCode/gnu/gdb/git/gdb/event-top.c:550
#15 0x00000000006b5688 in command_line_handler (rl=<optimised out>) at
/home/yao/SourceCode/gnu/gdb/git/gdb/event-top.c:740

... because it can't find "fr300" in frv_cgen_mach_table,

(gdb) p frv_cgen_mach_table
$1 = {{name = 0x1471cd5 "frv", bfd_name = 0x1471cd5 "frv", num = 1,
insn_chunk_bitsize = 0}, {name = 0x1471cd9 "fr550", bfd_name = 0x1471cd9
"fr550", 
    num = 2, insn_chunk_bitsize = 0}, {name = 0x1471cdf "fr500", bfd_name =
0x1471cdf "fr500", num = 3, insn_chunk_bitsize = 0}, {name = 0x1471cf1
"tomcat", 
    bfd_name = 0x1471cf1 "tomcat", num = 6, insn_chunk_bitsize = 0}, {name =
0x1471ceb "fr400", bfd_name = 0x1471ceb "fr400", num = 5, 
    insn_chunk_bitsize = 0}, {name = 0x1471ce5 "fr450", bfd_name = 0x1471ce5
"fr450", num = 4, insn_chunk_bitsize = 0}, {name = 0x1471cf8 "simple", 
    bfd_name = 0x1471cf8 "simple", num = 7, insn_chunk_bitsize = 0}, {name =
0x0, bfd_name = 0x0, num = 0, insn_chunk_bitsize = 0}}

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