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| author | Ingo Molnar <mingo@kernel.org> | 2015-06-08 09:42:03 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2015-06-08 10:14:21 +0300 |
| commit | b2502b418e63fcde0fe1857732a476b5aa3789b1 (patch) | |
| tree | f45204c8ffad5d3aa592d1277b56b41a0840f8e2 /arch/x86/kernel/traps.c | |
| parent | 4c8cd0c50d0b1559727bf0ec7ff27caeba2dfe09 (diff) | |
| download | linux-b2502b418e63fcde0fe1857732a476b5aa3789b1.tar.xz | |
x86/asm/entry: Untangle 'system_call' into two entry points: entry_SYSCALL_64 and entry_INT80_32
The 'system_call' entry points differ starkly between native 32-bit and 64-bit
kernels: on 32-bit kernels it defines the INT 0x80 entry point, while on
64-bit it's the SYSCALL entry point.
This is pretty confusing when looking at generic code, and it also obscures
the nature of the entry point at the assembly level.
So unangle this by splitting the name into its two uses:
system_call (32) -> entry_INT80_32
system_call (64) -> entry_SYSCALL_64
As per the generic naming scheme for x86 system call entry points:
entry_MNEMONIC_qualifier
where 'qualifier' is one of _32, _64 or _compat.
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/kernel/traps.c')
| -rw-r--r-- | arch/x86/kernel/traps.c | 5 |
1 files changed, 2 insertions, 3 deletions
diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c index edf97986a53d..001ddac221a1 100644 --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@ -72,8 +72,7 @@ gate_desc debug_idt_table[NR_VECTORS] __page_aligned_bss; #else #include <asm/processor-flags.h> #include <asm/setup.h> - -asmlinkage int system_call(void); +#include <asm/proto.h> #endif /* Must be page-aligned because the real IDT is used in a fixmap. */ @@ -997,7 +996,7 @@ void __init trap_init(void) #endif #ifdef CONFIG_X86_32 - set_system_trap_gate(IA32_SYSCALL_VECTOR, &system_call); + set_system_trap_gate(IA32_SYSCALL_VECTOR, entry_INT80_32); set_bit(IA32_SYSCALL_VECTOR, used_vectors); #endif |