syscall_get_* functions are required to be implemented on all architectures in order to extend the generic ptrace API with PTRACE_GET_SYSCALL_INFO request.
This adds remaining 4 syscall_get_* functions as documented in asm-generic/syscall.h: syscall_get_nr, syscall_get_arguments, syscall_get_error, and syscall_get_return_value. Cc: Richard Henderson <[email protected]> Cc: Ivan Kokshaysky <[email protected]> Cc: Matt Turner <[email protected]> Cc: Oleg Nesterov <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Elvira Khabirova <[email protected]> Cc: Eugene Syromyatnikov <[email protected]> Cc: [email protected] Signed-off-by: Dmitry V. Levin <[email protected]> --- arch/alpha/include/asm/syscall.h | 29 ++++++++++++++++++++++++++++- 1 file changed, 28 insertions(+), 1 deletion(-) diff --git a/arch/alpha/include/asm/syscall.h b/arch/alpha/include/asm/syscall.h index d73a6fcb519c..437758bdc49f 100644 --- a/arch/alpha/include/asm/syscall.h +++ b/arch/alpha/include/asm/syscall.h @@ -4,7 +4,34 @@ #include <uapi/linux/audit.h> -static inline int syscall_get_arch(void) +static inline int +syscall_get_nr(struct task_struct *task, struct pt_regs *regs) +{ + return regs->r0; +} + +static inline void +syscall_get_arguments(struct task_struct *task, struct pt_regs *regs, + unsigned int i, unsigned int n, unsigned long *args) +{ + BUG_ON(i + n > 6); + memcpy(args, ®s->r16 + i, n * sizeof(args[0])); +} + +static inline long +syscall_get_error(struct task_struct *task, struct pt_regs *regs) +{ + return regs->r19 ? -regs->r0 : 0; +} + +static inline long +syscall_get_return_value(struct task_struct *task, struct pt_regs *regs) +{ + return regs->r0; +} + +static inline int +syscall_get_arch(void) { return AUDIT_ARCH_ALPHA; } -- ldv
