Re: [RFC PATCH 03/14] arm: kprobes: Use generic kretprobe trampoline handler

[kernel test robot <lkp@intel.com>]

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Hi Masami,

[FYI, it's a private test report for your RFC patch.]
[auto build test WARNING on next-20200826]
[also build test WARNING on v5.9-rc2]
[cannot apply to tip/x86/core arm/for-next arm64/for-next/core ia64/next hp-parisc/for-next powerpc/next s390/features linus/master arc/for-next sparc-next/master v5.9-rc2 v5.9-rc1 v5.8]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Masami-Hiramatsu/kprobes-Unify-kretprobe-trampoline-handlers/20200826-215305
base:    f37be72473a007d5d66c52f6cdf43fc8c0961f95
config: arm-allyesconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   arch/arm/probes/kprobes/core.c:234:16: warning: no previous prototype for 'kprobe_handler' [-Wmissing-prototypes]
     234 | void __kprobes kprobe_handler(struct pt_regs *regs)
         |                ^~~~~~~~~~~~~~
   arch/arm/probes/kprobes/core.c:397:24: warning: no previous prototype for 'kretprobe_trampoline' [-Wmissing-prototypes]
     397 | void __naked __kprobes kretprobe_trampoline(void)
         |                        ^~~~~~~~~~~~~~~~~~~~
   In file included from arch/arm/include/asm/ptrace.h:10,
                    from arch/arm/include/asm/irqflags.h:7,
                    from include/linux/irqflags.h:16,
                    from arch/arm/include/asm/bitops.h:28,
                    from include/linux/bitops.h:29,
                    from include/linux/kernel.h:12,
                    from arch/arm/probes/kprobes/core.c:14:
   arch/arm/probes/kprobes/core.c: In function 'trampoline_handler':
>> arch/arm/include/uapi/asm/ptrace.h:140:22: warning: passing argument 3 of 'kretprobe_trampoline_handler' makes pointer from integer without a cast [-Wint-conversion]
     140 | #define ARM_fp  uregs[11]
   arch/arm/probes/kprobes/core.c:418:11: note: in expansion of macro 'ARM_fp'
     418 |     regs->ARM_fp);
         |           ^~~~~~
   In file included from arch/arm/probes/kprobes/core.c:15:
   include/linux/kprobes.h:207:11: note: expected 'void *' but argument is of type 'long unsigned int'
     207 |     void *frame_pointer)
         |     ~~~~~~^~~~~~~~~~~~~
   arch/arm/probes/kprobes/core.c: In function 'arch_prepare_kretprobe':
>> arch/arm/probes/kprobes/core.c:425:9: warning: assignment to 'void *' from 'long unsigned int' makes pointer from integer without a cast [-Wint-conversion]
     425 |  ri->fp = regs->ARM_fp;
         |         ^
   arch/arm/probes/kprobes/core.c: In function 'arch_init_kprobes':
   arch/arm/probes/kprobes/core.c:466:12: warning: old-style function definition [-Wold-style-definition]
     466 | int __init arch_init_kprobes()
         |            ^~~~~~~~~~~~~~~~~
   In file included from include/linux/energy_model.h:10,
                    from include/linux/device.h:16,
                    from include/linux/node.h:18,
                    from include/linux/cpu.h:17,
                    from include/linux/stop_machine.h:5,
                    from arch/arm/probes/kprobes/core.c:18:
   At top level:
   include/linux/sched/topology.h:40:3: warning: 'sd_flag_debug' defined but not used [-Wunused-const-variable=]
      40 | } sd_flag_debug[] = {
         |   ^~~~~~~~~~~~~
   In file included from include/linux/energy_model.h:10,
                    from include/linux/device.h:16,
                    from include/linux/node.h:18,
                    from include/linux/cpu.h:17,
                    from include/linux/stop_machine.h:5,
                    from arch/arm/probes/kprobes/core.c:18:
   include/linux/sched/topology.h:30:27: warning: 'SD_DEGENERATE_GROUPS_MASK' defined but not used [-Wunused-const-variable=]
      30 | static const unsigned int SD_DEGENERATE_GROUPS_MASK =
         |                           ^~~~~~~~~~~~~~~~~~~~~~~~~

# https://github.com/0day-ci/linux/commit/cea98296df6a68966c52388ca3b412fbc6e99b4b
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Masami-Hiramatsu/kprobes-Unify-kretprobe-trampoline-handlers/20200826-215305
git checkout cea98296df6a68966c52388ca3b412fbc6e99b4b
vim +/kretprobe_trampoline_handler +140 arch/arm/include/uapi/asm/ptrace.h

cb8db5d4578ac9 David Howells 2012-10-12  134  
cb8db5d4578ac9 David Howells 2012-10-12  135  #define ARM_cpsr	uregs[16]
cb8db5d4578ac9 David Howells 2012-10-12  136  #define ARM_pc		uregs[15]
cb8db5d4578ac9 David Howells 2012-10-12  137  #define ARM_lr		uregs[14]
cb8db5d4578ac9 David Howells 2012-10-12  138  #define ARM_sp		uregs[13]
cb8db5d4578ac9 David Howells 2012-10-12  139  #define ARM_ip		uregs[12]
cb8db5d4578ac9 David Howells 2012-10-12 @140  #define ARM_fp		uregs[11]
cb8db5d4578ac9 David Howells 2012-10-12  141  #define ARM_r10		uregs[10]
cb8db5d4578ac9 David Howells 2012-10-12  142  #define ARM_r9		uregs[9]
cb8db5d4578ac9 David Howells 2012-10-12  143  #define ARM_r8		uregs[8]
cb8db5d4578ac9 David Howells 2012-10-12  144  #define ARM_r7		uregs[7]
cb8db5d4578ac9 David Howells 2012-10-12  145  #define ARM_r6		uregs[6]
cb8db5d4578ac9 David Howells 2012-10-12  146  #define ARM_r5		uregs[5]
cb8db5d4578ac9 David Howells 2012-10-12  147  #define ARM_r4		uregs[4]
cb8db5d4578ac9 David Howells 2012-10-12  148  #define ARM_r3		uregs[3]
cb8db5d4578ac9 David Howells 2012-10-12  149  #define ARM_r2		uregs[2]
cb8db5d4578ac9 David Howells 2012-10-12  150  #define ARM_r1		uregs[1]
cb8db5d4578ac9 David Howells 2012-10-12  151  #define ARM_r0		uregs[0]
cb8db5d4578ac9 David Howells 2012-10-12  152  #define ARM_ORIG_r0	uregs[17]
cb8db5d4578ac9 David Howells 2012-10-12  153  

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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