Messages in this thread | | | Subject | Re: [PATCH v7 2/2] ARM: ftrace: Add MODULE_PLTS support | From | Florian Fainelli <> | Date | Wed, 27 Jan 2021 11:36:56 -0800 |
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On 1/27/2021 3:09 AM, Alexander A Sverdlin wrote: > From: Alexander Sverdlin <alexander.sverdlin@nokia.com> > > Teach ftrace_make_call() and ftrace_make_nop() about PLTs. > Teach PLT code about FTRACE and all its callbacks. > Otherwise the following might happen: > > ------------[ cut here ]------------ > WARNING: CPU: 14 PID: 2265 at .../arch/arm/kernel/insn.c:14 __arm_gen_branch+0x83/0x8c() > ... > Hardware name: LSI Axxia AXM55XX > [<c0314a49>] (unwind_backtrace) from [<c03115e9>] (show_stack+0x11/0x14) > [<c03115e9>] (show_stack) from [<c0519f51>] (dump_stack+0x81/0xa8) > [<c0519f51>] (dump_stack) from [<c032185d>] (warn_slowpath_common+0x69/0x90) > [<c032185d>] (warn_slowpath_common) from [<c03218f3>] (warn_slowpath_null+0x17/0x1c) > [<c03218f3>] (warn_slowpath_null) from [<c03143cf>] (__arm_gen_branch+0x83/0x8c) > [<c03143cf>] (__arm_gen_branch) from [<c0314337>] (ftrace_make_nop+0xf/0x24) > [<c0314337>] (ftrace_make_nop) from [<c038ebcb>] (ftrace_process_locs+0x27b/0x3e8) > [<c038ebcb>] (ftrace_process_locs) from [<c0378d79>] (load_module+0x11e9/0x1a44) > [<c0378d79>] (load_module) from [<c037974d>] (SyS_finit_module+0x59/0x84) > [<c037974d>] (SyS_finit_module) from [<c030e981>] (ret_fast_syscall+0x1/0x18) > ---[ end trace e1b64ced7a89adcc ]--- > ------------[ cut here ]------------ > WARNING: CPU: 14 PID: 2265 at .../kernel/trace/ftrace.c:1979 ftrace_bug+0x1b1/0x234() > ... > Hardware name: LSI Axxia AXM55XX > [<c0314a49>] (unwind_backtrace) from [<c03115e9>] (show_stack+0x11/0x14) > [<c03115e9>] (show_stack) from [<c0519f51>] (dump_stack+0x81/0xa8) > [<c0519f51>] (dump_stack) from [<c032185d>] (warn_slowpath_common+0x69/0x90) > [<c032185d>] (warn_slowpath_common) from [<c03218f3>] (warn_slowpath_null+0x17/0x1c) > [<c03218f3>] (warn_slowpath_null) from [<c038e87d>] (ftrace_bug+0x1b1/0x234) > [<c038e87d>] (ftrace_bug) from [<c038ebd5>] (ftrace_process_locs+0x285/0x3e8) > [<c038ebd5>] (ftrace_process_locs) from [<c0378d79>] (load_module+0x11e9/0x1a44) > [<c0378d79>] (load_module) from [<c037974d>] (SyS_finit_module+0x59/0x84) > [<c037974d>] (SyS_finit_module) from [<c030e981>] (ret_fast_syscall+0x1/0x18) > ---[ end trace e1b64ced7a89adcd ]--- > ftrace failed to modify [<e9ef7006>] 0xe9ef7006 > actual: 02:f0:3b:fa > ftrace record flags: 0 > (0) expected tramp: c0314265 > > Signed-off-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Tested-by: Florian Fainelli <f.fainelli@gmail.com> -- Florian
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