On 30/03/13 03:24, Tejun Heo wrote: > show_regs() is inherently arch-dependent but it does make sense to > print generic debug information and some archs already do albeit in > slightly different forms. This patch introduces a generic function to > print debug information from show_regs() so that different archs print > out the same information and it's much easier to modify what's > printed. > > show_regs_print_current() prints out the same debug info as > dump_stack() does plus CPU, task and thread_info pointers. > > * Archs which didn't print debug info now do. > > alpha, arc, blackfin, c6x, cris, frv, h8300, hexagon, ia64, m32r, > metag, microblaze, mn10300, openrisc, parisc, score, sh64, sparc, > um, xtensa > > * Already prints debug info. Replaced with show_regs_print_current(). > The printed information is superset of what used to be there. > > arm, arm64, avr32, mips, powerpc, sh32, tile, unicore32, x86 > > * The printed debug information includes arch-specific bits. Left > alone. > > s390 > > Note that now all archs print the debug info before actual register > dumps. > > An example BUG() dump follows. > > kernel BUG at /work/os/work/kernel/workqueue.c:4841! > invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC > Modules linked in: > Pid: 1, comm: swapper/0 Tainted: G W 3.9.0-rc1-work+ #20 empty empty/S3992 > CPU:0 task: ffff88007c85e040 ti: ffff88007c860000 task.ti: ffff88007c860000 > RIP: 0010:[<ffffffff8234a042>] [<ffffffff8234a042>] init_workqueues+0x15/0x17 > RSP: 0000:ffff88007c861ec8 EFLAGS: 00010296 > RAX: 0000000000000024 RBX: ffffffff82446608 RCX: 0000000000000001 > RDX: 0000000000000046 RSI: 0000000000000000 RDI: 0000000000000009 > RBP: ffff88007c861ec8 R08: 0000000000000000 R09: 0000000000000000 > R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff8234a02d > R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 > FS: 0000000000000000(0000) GS:ffff88007dc00000(0000) knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b > CR2: ffff88015f7ff000 CR3: 00000000021f1000 CR4: 00000000000007f0 > DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 > DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 > Stack: > ffff88007c861ef8 ffffffff81000312 ffffffff82446608 ffff88007c85e650 > 0000000000000003 0000000000000000 ffff88007c861f38 ffffffff82335e5d > ffff88007c862080 ffffffff8223d8c0 ffff88007c862080 ffffffff81c47730 > Call Trace: > [<ffffffff81000312>] do_one_initcall+0x122/0x170 > [<ffffffff82335e5d>] kernel_init_freeable+0x9b/0x1c8 > ... > > v2: Typo fix in x86-32. > > Signed-off-by: Tejun Heo <tj@xxxxxxxxxx> For metag: Acked-by: James Hogan <james.hogan@xxxxxxxxxx> Cheers James -- To unsubscribe from this list: send the line "unsubscribe linux-arch" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
