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Merge branch 'x86-entry-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

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Pull x86 entry updates from Ingo Molnar:
 "This contains x32 and compat syscall improvements, the biggest one of
  which splits x32 syscalls into their own table, which allows new
  syscalls to share the x32 and x86-64 number - which turns the
  512-547 special syscall numbers range into a legacy wart that won't be
  extended going forward"

* 'x86-entry-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/syscalls: Split the x32 syscalls into their own table
  x86/syscalls: Disallow compat entries for all types of 64-bit syscalls
  x86/syscalls: Use the compat versions of rt_sigsuspend() and rt_sigprocmask()
  x86/syscalls: Make __X32_SYSCALL_BIT be unsigned long
This commit is contained in:
Linus Torvalds
2019-09-16 19:06:29 -07:00
parent 22331f8952 6365b842aa
commit e0d60a1e68
10 changed files with 168 additions and 32 deletions
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20
arch/x86/kernel/asm-offsets_64.c
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@@ -6,13 +6,28 @@
#include <asm/ia32.h>
#define __SYSCALL_64(nr, sym, qual) [nr] = 1,
#define __SYSCALL_X32(nr, sym, qual)
static char syscalls_64[] = {
#include <asm/syscalls_64.h>
};
#undef __SYSCALL_64
#undef __SYSCALL_X32
#ifdef CONFIG_X86_X32_ABI
#define __SYSCALL_64(nr, sym, qual)
#define __SYSCALL_X32(nr, sym, qual) [nr] = 1,
static char syscalls_x32[] = {
#include <asm/syscalls_64.h>
};
#undef __SYSCALL_64
#undef __SYSCALL_X32
#endif
#define __SYSCALL_I386(nr, sym, qual) [nr] = 1,
static char syscalls_ia32[] = {
#include <asm/syscalls_32.h>
};
#undef __SYSCALL_I386
#if defined(CONFIG_KVM_GUEST) && defined(CONFIG_PARAVIRT_SPINLOCKS)
#include <asm/kvm_para.h>
@@ -80,6 +95,11 @@ int main(void)
DEFINE(__NR_syscall_max, sizeof(syscalls_64) - 1);
DEFINE(NR_syscalls, sizeof(syscalls_64));
#ifdef CONFIG_X86_X32_ABI
DEFINE(__NR_syscall_x32_max, sizeof(syscalls_x32) - 1);
DEFINE(X32_NR_syscalls, sizeof(syscalls_x32));
#endif
DEFINE(__NR_syscall_compat_max, sizeof(syscalls_ia32) - 1);
DEFINE(IA32_NR_syscalls, sizeof(syscalls_ia32));