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syscalls/core, syscalls/x86: Rename struct pt_regs-based sys_*() to __x64_sys_*()

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This rename allows us to have a coherent syscall stub naming convention on
64-bit x86 (0xffffffff prefix removed):

 810f0af0 t            kernel_waitid	# common (32/64) kernel helper

 <inline>            __do_sys_waitid	# inlined helper doing actual work
 810f0be0 t          __se_sys_waitid	# C func calling inlined helper

 <inline>     __do_compat_sys_waitid	# inlined helper doing actual work
 810f0d80 t   __se_compat_sys_waitid	# compat C func calling inlined helper

 810f2080 T         __x64_sys_waitid	# x64 64-bit-ptregs -> C stub
 810f20b0 T        __ia32_sys_waitid	# ia32 32-bit-ptregs -> C stub[*]
 810f2470 T __ia32_compat_sys_waitid	# ia32 32-bit-ptregs -> compat C stub
 810f2490 T  __x32_compat_sys_waitid	# x32 64-bit-ptregs -> compat C stub

    [*] This stub is unused, as the syscall table links
	__ia32_compat_sys_waitid instead of __ia32_sys_waitid as we need
	a compat variant here.

Suggested-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Dominik Brodowski <linux@dominikbrodowski.net>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20180409105145.5364-4-linux@dominikbrodowski.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Dominik Brodowski
2018-04-09 12:51:44 +02:00
committed by Ingo Molnar
parent 5ac9efa3c5
commit d5a00528b5
5 changed files with 405 additions and 362 deletions
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6
arch/x86/entry/vsyscall/vsyscall_64.c
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@@ -229,12 +229,12 @@ bool emulate_vsyscall(struct pt_regs *regs, unsigned long address)
switch (vsyscall_nr) {
case 0:
/* this decodes regs->di and regs->si on its own */
ret = sys_gettimeofday(regs);
ret = __x64_sys_gettimeofday(regs);
break;
case 1:
/* this decodes regs->di on its own */
ret = sys_time(regs);
ret = __x64_sys_time(regs);
break;
case 2:
@@ -242,7 +242,7 @@ bool emulate_vsyscall(struct pt_regs *regs, unsigned long address)
orig_dx = regs->dx;
regs->dx = 0;
/* this decodes regs->di, regs->si and regs->dx on its own */
ret = sys_getcpu(regs);
ret = __x64_sys_getcpu(regs);
regs->dx = orig_dx;
break;
}