Public bug reported:
Version: GNU gdb (Ubuntu 15.0.50.20240403-0ubuntu1) 15.0.50.20240403-git
File: ELF 32-bit LSB executable, MIPS, MIPS32 rel2 version 1 (SYSV), statically
linked, with debug_info, not stripped
Compiler used to create test file: gcc version 8.3.1 (Microchip XC32 Compiler
v4.50)
While using gdb-multiarch with a MIPS ELF, created by Microchip's GCC fork
(xc32),
line info only becomes available after having disassembled the function by
function name.
(Address only won't work even though it correctly gets the scope of the
function).
Line info however is already available with "normal" gdb.
Steps to reproduce:
Build a simple executable:
/opt/microchip/xc32/v4.50/bin/xc32-c++ -nostartfiles -nostdlib -g simple_main.c
Open file with gdb-multiarch:
gdb-multiarch ./a.out
Attempt to print line info:
info line *0x9d000020
Notice it doesn't work:
No line number information available for address 0x9d000020 <main+32>
Attempt to print line info by name:
info line main
See it works.
Reattempt to print line info by address:
Suddendly now it works.
GDB example output:
(gdb) info line *0x9d000020
No line number information available for address 0x9d000020 <main+32>
(gdb) info line main
Line 2 of "simple_main.c" starts at address 0x9d000000 <main(int, char**)> and
ends at 0x9d000014 <main(int, char**)+20>.
(gdb) info line *0x9d000020
Line 5 of "simple_main.c" starts at address 0x9d000020 <main(int, char**)+32>
and ends at 0x9d00002c <main(int, char**)+44>.
** Affects: gdb (Ubuntu)
Importance: Undecided
Status: New
** Attachment added: "simple_main.c"
https://bugs.launchpad.net/bugs/2106811/+attachment/5871050/+files/simple_main.c
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https://bugs.launchpad.net/bugs/2106811
Title:
Line info missing on multiarch build with MIPS
Status in gdb package in Ubuntu:
New
Bug description:
Version: GNU gdb (Ubuntu 15.0.50.20240403-0ubuntu1) 15.0.50.20240403-git
File: ELF 32-bit LSB executable, MIPS, MIPS32 rel2 version 1 (SYSV),
statically linked, with debug_info, not stripped
Compiler used to create test file: gcc version 8.3.1 (Microchip XC32 Compiler
v4.50)
While using gdb-multiarch with a MIPS ELF, created by Microchip's GCC fork
(xc32),
line info only becomes available after having disassembled the function by
function name.
(Address only won't work even though it correctly gets the scope of the
function).
Line info however is already available with "normal" gdb.
Steps to reproduce:
Build a simple executable:
/opt/microchip/xc32/v4.50/bin/xc32-c++ -nostartfiles -nostdlib -g
simple_main.c
Open file with gdb-multiarch:
gdb-multiarch ./a.out
Attempt to print line info:
info line *0x9d000020
Notice it doesn't work:
No line number information available for address 0x9d000020 <main+32>
Attempt to print line info by name:
info line main
See it works.
Reattempt to print line info by address:
Suddendly now it works.
GDB example output:
(gdb) info line *0x9d000020
No line number information available for address 0x9d000020 <main+32>
(gdb) info line main
Line 2 of "simple_main.c" starts at address 0x9d000000 <main(int, char**)>
and ends at 0x9d000014 <main(int, char**)+20>.
(gdb) info line *0x9d000020
Line 5 of "simple_main.c" starts at address 0x9d000020 <main(int, char**)+32>
and ends at 0x9d00002c <main(int, char**)+44>.
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https://bugs.launchpad.net/ubuntu/+source/gdb/+bug/2106811/+subscriptions
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