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Message-ID: <202507101225.jSw3nM7e-lkp@intel.com>
Date: Thu, 10 Jul 2025 13:02:39 +0800
From: kernel test robot <lkp@...el.com>
To: Robin Murphy <robin.murphy@....com>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
Catalin Marinas <catalin.marinas@....com>,
Mark Brown <broonie@...nel.org>
Subject: arch/arm64/kernel/signal.c:1042: undefined reference to
`restore_gcs_context'
Hi Robin,
FYI, the error/warning still remains.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 8c2e52ebbe885c7eeaabd3b7ddcdc1246fc400d2
commit: f00b53f1614f7be554fd28b9594ef4e63e2686c5 arm64: cpufeature: Add GCS to cpucap_is_possible()
date: 7 months ago
config: arm64-randconfig-003-20250710 (https://download.01.org/0day-ci/archive/20250710/202507101225.jSw3nM7e-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250710/202507101225.jSw3nM7e-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202507101225.jSw3nM7e-lkp@intel.com/
All errors (new ones prefixed by >>):
aarch64-linux-ld: Unexpected GOT/PLT entries detected!
aarch64-linux-ld: Unexpected run-time procedure linkages detected!
aarch64-linux-ld: arch/arm64/kernel/signal.o: in function `restore_sigframe':
>> arch/arm64/kernel/signal.c:1042: undefined reference to `restore_gcs_context'
aarch64-linux-ld: arch/arm64/kernel/signal.o: in function `setup_sigframe':
>> arch/arm64/kernel/signal.c:1300: undefined reference to `preserve_gcs_context'
vim +1042 arch/arm64/kernel/signal.c
47ccb02868cead Dave Martin 2017-06-15 1002
2c020ed8d148f7 Catalin Marinas 2012-03-05 1003 static int restore_sigframe(struct pt_regs *regs,
2e8a1acea8597f Kevin Brodsky 2024-10-29 1004 struct rt_sigframe __user *sf,
2e8a1acea8597f Kevin Brodsky 2024-10-29 1005 struct user_access_state *ua_state)
2c020ed8d148f7 Catalin Marinas 2012-03-05 1006 {
2c020ed8d148f7 Catalin Marinas 2012-03-05 1007 sigset_t set;
2c020ed8d148f7 Catalin Marinas 2012-03-05 1008 int i, err;
47ccb02868cead Dave Martin 2017-06-15 1009 struct user_ctxs user;
2c020ed8d148f7 Catalin Marinas 2012-03-05 1010
2c020ed8d148f7 Catalin Marinas 2012-03-05 1011 err = __copy_from_user(&set, &sf->uc.uc_sigmask, sizeof(set));
2c020ed8d148f7 Catalin Marinas 2012-03-05 1012 if (err == 0)
2c020ed8d148f7 Catalin Marinas 2012-03-05 1013 set_current_blocked(&set);
2c020ed8d148f7 Catalin Marinas 2012-03-05 1014
2c020ed8d148f7 Catalin Marinas 2012-03-05 1015 for (i = 0; i < 31; i++)
2c020ed8d148f7 Catalin Marinas 2012-03-05 1016 __get_user_error(regs->regs[i], &sf->uc.uc_mcontext.regs[i],
2c020ed8d148f7 Catalin Marinas 2012-03-05 1017 err);
2c020ed8d148f7 Catalin Marinas 2012-03-05 1018 __get_user_error(regs->sp, &sf->uc.uc_mcontext.sp, err);
2c020ed8d148f7 Catalin Marinas 2012-03-05 1019 __get_user_error(regs->pc, &sf->uc.uc_mcontext.pc, err);
2c020ed8d148f7 Catalin Marinas 2012-03-05 1020 __get_user_error(regs->pstate, &sf->uc.uc_mcontext.pstate, err);
2c020ed8d148f7 Catalin Marinas 2012-03-05 1021
2c020ed8d148f7 Catalin Marinas 2012-03-05 1022 /*
2c020ed8d148f7 Catalin Marinas 2012-03-05 1023 * Avoid sys_rt_sigreturn() restarting.
2c020ed8d148f7 Catalin Marinas 2012-03-05 1024 */
17c28958600928 Dave Martin 2017-08-01 1025 forget_syscall(regs);
2c020ed8d148f7 Catalin Marinas 2012-03-05 1026
dbd4d7ca563fd0 Mark Rutland 2016-03-01 1027 err |= !valid_user_regs(®s->user_regs, current);
47ccb02868cead Dave Martin 2017-06-15 1028 if (err == 0)
47ccb02868cead Dave Martin 2017-06-15 1029 err = parse_user_sigframe(&user, sf);
2c020ed8d148f7 Catalin Marinas 2012-03-05 1030
6d502b6ba1b267 Suzuki K Poulose 2020-01-13 1031 if (err == 0 && system_supports_fpsimd()) {
8cd969d28fd284 Dave Martin 2017-10-31 1032 if (!user.fpsimd)
8cd969d28fd284 Dave Martin 2017-10-31 1033 return -EINVAL;
8cd969d28fd284 Dave Martin 2017-10-31 1034
df07443f477a7e Mark Brown 2022-06-24 1035 if (user.sve)
8cd969d28fd284 Dave Martin 2017-10-31 1036 err = restore_sve_fpsimd_context(&user);
df07443f477a7e Mark Brown 2022-06-24 1037 else
4e4e93045fe1ad Mark Brown 2023-01-31 1038 err = restore_fpsimd_context(&user);
8cd969d28fd284 Dave Martin 2017-10-31 1039 }
2c020ed8d148f7 Catalin Marinas 2012-03-05 1040
16f47bb9ac8afe Mark Brown 2024-10-01 1041 if (err == 0 && system_supports_gcs() && user.gcs)
16f47bb9ac8afe Mark Brown 2024-10-01 @1042 err = restore_gcs_context(&user);
16f47bb9ac8afe Mark Brown 2024-10-01 1043
e9d14f3f3fb76c Dongxu Sun 2023-03-17 1044 if (err == 0 && system_supports_tpidr2() && user.tpidr2)
39e54499280f37 Mark Brown 2022-12-27 1045 err = restore_tpidr2_context(&user);
39e54499280f37 Mark Brown 2022-12-27 1046
8c46def44409fc Mark Brown 2024-03-06 1047 if (err == 0 && system_supports_fpmr() && user.fpmr)
8c46def44409fc Mark Brown 2024-03-06 1048 err = restore_fpmr_context(&user);
8c46def44409fc Mark Brown 2024-03-06 1049
39782210eb7e87 Mark Brown 2022-04-19 1050 if (err == 0 && system_supports_sme() && user.za)
39782210eb7e87 Mark Brown 2022-04-19 1051 err = restore_za_context(&user);
39782210eb7e87 Mark Brown 2022-04-19 1052
ee072cf708048c Mark Brown 2023-01-16 1053 if (err == 0 && system_supports_sme2() && user.zt)
ee072cf708048c Mark Brown 2023-01-16 1054 err = restore_zt_context(&user);
ee072cf708048c Mark Brown 2023-01-16 1055
9160f7e909e179 Joey Gouly 2024-08-22 1056 if (err == 0 && system_supports_poe() && user.poe)
2e8a1acea8597f Kevin Brodsky 2024-10-29 1057 err = restore_poe_context(&user, ua_state);
9160f7e909e179 Joey Gouly 2024-08-22 1058
2c020ed8d148f7 Catalin Marinas 2012-03-05 1059 return err;
2c020ed8d148f7 Catalin Marinas 2012-03-05 1060 }
2c020ed8d148f7 Catalin Marinas 2012-03-05 1061
:::::: The code at line 1042 was first introduced by commit
:::::: 16f47bb9ac8afe09e7ca14cc53748f779b2a12e0 arm64/signal: Expose GCS state in signal frames
:::::: TO: Mark Brown <broonie@...nel.org>
:::::: CC: Catalin Marinas <catalin.marinas@....com>
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