On 08/10/2018 05:04 PM, Al Viro wrote:
Once upon a time it used to have a C part that printed a warning about unimplemented OSF syscalls. That's what it's been doing all over the OSF syscall range, while the native Linux syscall range uses sys_ni_syscall().
With those warnings about unimplemented OSF syscalls gone (circa 2.4), alpha_ni_syscall() has shrunk to that little bit of asm and the only reason it hasn't been replaced with sys_ni_syscall() everywhere is that extra twist needed in case of syscall #0.
Let's keep it only for syscall #0 and replace the rest with sys_ni_syscall. And use sys_ni_syscall for "number out range" in ptraced-call case, as we'd been doing for normal codepath since 2.1.86...
Signed-off-by: Al Viro firstname.lastname@example.org
Acked-by: Richard Henderson email@example.com
+++ b/arch/alpha/kernel/entry.S @@ -473,7 +473,7 @@ entSys: bne $3, strace beq $4, 1f ldq $27, 0($5) -1: jsr $26, ($27), alpha_ni_syscall +1: jsr $26, ($27), sys_ni_syscall ldgp $gp, 0($26) blt $0, $syscall_error /* the call failed */ stq $0, 0($sp)
Once upon a time I had a patch to make the hint be sys_gettimeofday, as the most common syscall. Dunno what happened to that.
But I must guess that an unimplemented syscall has got to be the anti-hint of the ... long-ass-time-frame.