On Mon, Feb 28, 2022 at 11:04:47AM +0530, Maninder Singh wrote:

with commit '82b37e632513 ("kallsyms: print module name in %ps/S
case when KALLSYMS is disabled"), module name printing was enhanced.

As per suggestion from Petr Mladek [off-list ref], covering
other flavours also to print build id also.

for %pB no change as it needs to know symbol name to adjust address
value which can't be done without KALLSYMS.

original output with KALLSYMS:
[8.842129] ps function_1 [crash]
[8.842735] pS function_1+0x4/0x2c [crash]
[8.842890] pSb function_1+0x4/0x2c [crash b367e79021b9f3b0172f9a36d4261c1f528ca1b3]
[8.843175] pB function_1+0x4/0x2c [crash]
[8.843362] pBb function_1+0x4/0x2c [crash b367e79021b9f3b0172f9a36d4261c1f528ca1b3]

original output without KALLSYMS:
[12.487424] ps 0xffff800000eb008c
[12.487598] pS 0xffff800000eb008c
[12.487723] pSb 0xffff800000eb008c
[12.487850] pB 0xffff800000eb008c
[12.487967] pBb 0xffff800000eb008c

With patched kernel without KALLSYMS:
[9.205207] ps 0xffff800000eb008c [crash]
[9.205564] pS 0xffff800000eb0000+0x8c [crash]
[9.205757] pSb 0xffff800000eb0000+0x8c [crash b367e79021b9f3b0172f9a36d4261c1f528ca1b3]
[9.206066] pB 0xffff800000eb0000+0x8c [crash]
[9.206257] pBb 0xffff800000eb0000+0x8c [crash b367e79021b9f3b0172f9a36d4261c1f528ca1b3]

Suggested-by: Petr Mladek <pmladek@suse.com>
Co-developed-by: Vaneet Narang <redacted>
Signed-off-by: Vaneet Narang <redacted>
Signed-off-by: Maninder Singh <redacted>
---
earlier discussion: https://lkml.org/lkml/2022/2/10/185

 include/linux/kallsyms.h | 27 --------------
 kernel/module.c          |  4 +--

See Aaron's work which you'll need to base your work on:

https://lkml.kernel.org/r/20220222141303.1392190-1-atomlin@redhat.com

Soon Aaron will post a v9.

  Luis