From 578b21fd3ab2d9901ce40ed802e428a41a40610d Mon Sep 17 00:00:00 2001 From: Jinjie Ruan Date: Wed, 28 Jan 2026 11:19:30 +0800 Subject: entry: Add arch_ptrace_report_syscall_entry/exit() ARM64 requires a architecture specific ptrace wrapper as it needs to save and restore scratch registers. Provide arch_ptrace_report_syscall_entry/exit() wrappers which fall back to ptrace_report_syscall_entry/exit() if the architecture does not provide them. No functional change intended. [ tglx: Massaged changelog and comments ] Suggested-by: Mark Rutland Suggested-by: Thomas Gleixner Signed-off-by: Jinjie Ruan Signed-off-by: Thomas Gleixner Reviewed-by: Kevin Brodsky Link: https://patch.msgid.link/20260128031934.3906955-11-ruanjinjie@huawei.com --- include/linux/entry-common.h | 36 ++++++++++++++++++++++++++++++++++++ 1 file changed, 36 insertions(+) (limited to 'include/linux') diff --git a/include/linux/entry-common.h b/include/linux/entry-common.h index 5316004940c0..bea207e32c58 100644 --- a/include/linux/entry-common.h +++ b/include/linux/entry-common.h @@ -45,6 +45,24 @@ SYSCALL_WORK_SYSCALL_EXIT_TRAP | \ ARCH_SYSCALL_WORK_EXIT) +/** + * arch_ptrace_report_syscall_entry - Architecture specific ptrace_report_syscall_entry() wrapper + * + * Invoked from syscall_trace_enter() to wrap ptrace_report_syscall_entry(). + * + * This allows architecture specific ptrace_report_syscall_entry() + * implementations. If not defined by the architecture this falls back to + * to ptrace_report_syscall_entry(). + */ +static __always_inline int arch_ptrace_report_syscall_entry(struct pt_regs *regs); + +#ifndef arch_ptrace_report_syscall_entry +static __always_inline int arch_ptrace_report_syscall_entry(struct pt_regs *regs) +{ + return ptrace_report_syscall_entry(regs); +} +#endif + long syscall_trace_enter(struct pt_regs *regs, unsigned long work); /** @@ -112,6 +130,24 @@ static __always_inline long syscall_enter_from_user_mode(struct pt_regs *regs, l return ret; } +/** + * arch_ptrace_report_syscall_exit - Architecture specific ptrace_report_syscall_exit() + * + * This allows architecture specific ptrace_report_syscall_exit() + * implementations. If not defined by the architecture this falls back to + * to ptrace_report_syscall_exit(). + */ +static __always_inline void arch_ptrace_report_syscall_exit(struct pt_regs *regs, + int step); + +#ifndef arch_ptrace_report_syscall_exit +static __always_inline void arch_ptrace_report_syscall_exit(struct pt_regs *regs, + int step) +{ + ptrace_report_syscall_exit(regs, step); +} +#endif + /** * syscall_exit_work - Handle work before returning to user mode * @regs: Pointer to current pt_regs -- cgit v1.2.3