Messages in this thread Patch in this message | | | From | Nikolay Borisov <> | Subject | [PATCH v3 2/5] x86/entry: Rename ignore_sysret | Date | Fri, 16 Jun 2023 15:57:27 +0300 |
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Give ignore_sysret() a more descriptive name as it's actually used to make 32bit syscalls return ENOSYS, rather than doing anything specific with regards to sysret.
Signed-off-by: Nikolay Borisov <nik.borisov@suse.com> --- arch/x86/entry/entry_64.S | 4 ++-- arch/x86/include/asm/processor.h | 2 +- arch/x86/kernel/cpu/common.c | 2 +- 3 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S index f31e286c2977..ccce0ccd8589 100644 --- a/arch/x86/entry/entry_64.S +++ b/arch/x86/entry/entry_64.S @@ -1519,12 +1519,12 @@ SYM_CODE_END(asm_exc_nmi) * This handles SYSCALL from 32-bit code. There is no way to program * MSRs to fully disable 32-bit SYSCALL. */ -SYM_CODE_START(ignore_sysret) +SYM_CODE_START(entry_SYSCALL32_ignore) UNWIND_HINT_END_OF_STACK ENDBR mov $-ENOSYS, %eax sysretl -SYM_CODE_END(ignore_sysret) +SYM_CODE_END(entry_SYSCALL32_ignore) #endif .pushsection .text, "ax" diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h index a1e4fa58b357..61c10b4e3e35 100644 --- a/arch/x86/include/asm/processor.h +++ b/arch/x86/include/asm/processor.h @@ -399,7 +399,7 @@ static inline unsigned long cpu_kernelmode_gs_base(int cpu) return (unsigned long)per_cpu(fixed_percpu_data.gs_base, cpu); } -extern asmlinkage void ignore_sysret(void); +extern asmlinkage void entry_SYSCALL32_ignore(void); /* Save actual FS/GS selectors and bases to current->thread */ void current_save_fsgs(void); diff --git a/arch/x86/kernel/cpu/common.c b/arch/x86/kernel/cpu/common.c index 80710a68ef7d..b20774181e1a 100644 --- a/arch/x86/kernel/cpu/common.c +++ b/arch/x86/kernel/cpu/common.c @@ -2066,7 +2066,7 @@ void syscall_init(void) (unsigned long)(cpu_entry_stack(smp_processor_id()) + 1)); wrmsrl_safe(MSR_IA32_SYSENTER_EIP, (u64)entry_SYSENTER_compat); #else - wrmsrl_cstar((unsigned long)ignore_sysret); + wrmsrl_cstar((unsigned long)entry_SYSCALL32_ignore); wrmsrl_safe(MSR_IA32_SYSENTER_CS, (u64)GDT_ENTRY_INVALID_SEG); wrmsrl_safe(MSR_IA32_SYSENTER_ESP, 0ULL); wrmsrl_safe(MSR_IA32_SYSENTER_EIP, 0ULL); -- 2.34.1
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