https://sourceware.org/bugzilla/show_bug.cgi?id=23837
Bug ID: 23837
Summary: Segmentation fault in resolve_symbol_value at
symbols.c:1165
Product: binutils
Version: 2.31
Status: NEW
Severity: normal
Priority: P2
Component: gas
Assignee: unassigned at sourceware dot org
Reporter: danglin at gcc dot gnu.org
Target Milestone: ---
Host: hppa-unknown-linux-gnu
Target: hppa-unknown-linux-gnu
Build: hppa-unknown-linux-gnu
Created attachment 11370
--> https://sourceware.org/bugzilla/attachment.cgi?id=11370&action=edit
.s file
Assembly of gbc.c from gcl-2.6.12 fails with a segmentation fault. Attached
assembly source.
The fault occurs here:
(gdb) r
Starting program: /home/dave/opt/gnu/bin/as -o gbc.o gbc.s
Program received signal SIGSEGV, Segmentation fault.
0x00034bac in resolve_symbol_value (symp=0x6f668)
at ../../src/gas/symbols.c:1165
1165 final_val += symp->sy_frag->fr_address / OCTETS_PER_BYTE;
(gdb) bt
#0 0x00034bac in resolve_symbol_value (symp=0x6f668)
at ../../src/gas/symbols.c:1165
#1 0x0003b710 in write_object_file () at ../../src/gas/write.c:2266
#2 0x00013104 in main (argc=, argv=)
at ../../src/gas/as.c:1385
(gdb) p *symp
$1 = {sy_flags = {sy_local_symbol = 0, sy_written = 0, sy_resolved = 0,
sy_resolving = 1, sy_used_in_reloc = 0, sy_used = 0, sy_volatile = 0,
sy_forward_ref = 0, sy_mri_common = 0, sy_weakrefr = 0, sy_weakrefd = 0},
bsym = 0x8c8c8, sy_value = {X_add_symbol = 0x0, X_op_symbol = 0x0,
X_add_number = 0, X_op = O_constant, X_unsigned = 0, X_extrabit = 0,
X_md = 0}, sy_next = 0x6f760, sy_previous = 0x6f620, sy_frag = 0x655f7265,
sy_obj = {local = 0, size = 0x0, versioned_name = 0x0}}
It appears the value at symp->sy_frag is set in brk:
(gdb) watch *0x6f688
Watchpoint 2: *0x6f688
(gdb) c
Continuing.
Watchpoint 2: *0x6f688
Old value =
New value = 0
0xf80d7ad0 in brk () from /lib/hppa-linux-gnu/libc.so.6
(gdb) c
Continuing.
Watchpoint 2: *0x6f688
Old value = 0
New value = 1700754021
0xf80d7ad0 in brk () from /lib/hppa-linux-gnu/libc.so.6
(gdb) p/x *0x6f688
$6 = 0x655f7265
(gdb) bt
#0 0xf80d7ad0 in brk () from /lib/hppa-linux-gnu/libc.so.6
#1 0xf80d7c20 in sbrk () from /lib/hppa-linux-gnu/libc.so.6
#2 0xf80718c4 in __default_morecore () from /lib/hppa-linux-gnu/libc.so.6
#3 0xf806d0e0 in ?? () from /lib/hppa-linux-gnu/libc.so.6
#4 0xf806e210 in ?? () from /lib/hppa-linux-gnu/libc.so.6
#5 0xf806f7cc in malloc () from /lib/hppa-linux-gnu/libc.so.6
#6 0xf8594b3c in _objalloc_alloc (o=0x21000 ,
original_len=) at ../../src/libiberty/objalloc.c:159
#7 0xf8523bc0 in bfd_alloc (abfd=, size=)
at ../../src/bfd/opncls.c:950
#8 0xf85241e4 in bfd_zalloc (abfd=, size=716800)
at ../../src/bfd/opncls.c:998
#9 0xf854ab10 in _bfd_elf_make_empty_symbol (abfd=0xaf000)
at ../../src/bfd/elf.c:8691
#10 0x00034548 in symbol_create (name=, segment=0xae590,
valu=4162225112, frag=0x21000 )
at ../../src/gas/symbols.c:147
#11 0x0003463c in symbol_new (name=, segment=,
valu=, frag=) at ../../src/gas/symbols.c:89
#12 0x000360c4 in symbol_find_or_make (name=0xaf000 "")
at ../../src/gas/symbols.c:532
#13 0x0001f4ac in operand (expressionP=0xf8165c80, mode=(unknown: 4162225112))
at ../../src/gas/expr.c:1305
---Type to continue, or q to quit---
#14 0x0001f9a4 in expr (rankarg=, resultP=0x1008,
mode=(unknown: 135168)) at ../../src/gas/expr.c:1765
#15 0x00040cb8 in parse_cons_expression_hppa (exp=0xf8165c80)
at ../../src/gas/config/tc-hppa.c:2490
#16 0x0002d530 in cons_worker (nbytes=135168, rva=2672)
at ../../src/gas/read.c:4004
#17 0x0003e338 in pa_cons (nbytes=)
at ../../src/gas/config/tc-hppa.c:8160
#18 0x000303ac in read_a_source_file (name=)
at ../../src/gas/read.c:1148
#19 0x00012ec8 in perform_an_assembly_pass (argv=,
argc=-133469057) at ../../src/gas/as.c:1192
#20 main (argc=, argv=)
at ../../src/gas/as.c:1349
(gdb) disass $pc-32,$pc+32
Dump of assembler code from 0xf80d7ab0 to 0xf80d7af0:
0xf80d7ab0 : ldw,mb -80(sp),r7
0xf80d7ab4 : stw rp,-14(sp)
0xf80d7ab8 : stw,ma r4,40(sp)
0xf80d7abc : stw r3,-3c(sp)
0xf80d7ac0 : stw r19,-20(sp)
0xf80d7ac4 : copy r19,r4
0xf80d7ac8 : be,l 100(sr2,r0),sr0,r31
0xf80d7acc : ldi 2d,r20
=> 0xf80d7ad0 : copy r4,r19
0xf80d7ad4 : ldi ffd,r20
0xf80d7ad8 : ldo ffe(ret0),r21
0xf80d7adc : cmpb,>>= r20,r21,0xf80d7b08
0xf80d7ae0 : addil L%1000,r19,r1
0xf80d7ae4 : ldw 764(r1),r20
0xf80d7ae8 : stw ret0,0(r20)
0xf80d7aec : cmpb,<< ret0,r26,0xf80d7b48
End of assembler dump.
(gdb) c
Continuing.
Program received signal SIGSEGV, Segmentation fault.
0x00034bac in resolve_symbol_value (symp=0x6f668)
at ../../src/gas/symbols.c:1165
1165 final_val += symp->sy_frag->fr_address / OCTETS_PER_BYTE;
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