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author | Linus Torvalds <torvalds@linux-foundation.org> | 2018-04-15 16:12:35 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-04-15 16:12:35 -0700 |
commit | 9fb71c2f230df44bdd237e9a4457849a3909017d (patch) | |
tree | acf07cd9a8ba343d131afa3330bf148bacc72e7a /arch/x86/entry/syscall_32.c | |
parent | Merge branch 'x86-pti-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip (diff) | |
parent | Merge branch 'WIP.x86/asm' into x86/urgent, because the topic is ready (diff) | |
download | linux-dev-9fb71c2f230df44bdd237e9a4457849a3909017d.tar.xz linux-dev-9fb71c2f230df44bdd237e9a4457849a3909017d.zip |
Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Thomas Gleixner:
"A set of fixes and updates for x86:
- Address a swiotlb regression which was caused by the recent DMA
rework and made driver fail because dma_direct_supported() returned
false
- Fix a signedness bug in the APIC ID validation which caused invalid
APIC IDs to be detected as valid thereby bloating the CPU possible
space.
- Fix inconsisten config dependcy/select magic for the MFD_CS5535
driver.
- Fix a corruption of the physical address space bits when encryption
has reduced the address space and late cpuinfo updates overwrite
the reduced bit information with the original value.
- Dominiks syscall rework which consolidates the architecture
specific syscall functions so all syscalls can be wrapped with the
same macros. This allows to switch x86/64 to struct pt_regs based
syscalls. Extend the clearing of user space controlled registers in
the entry patch to the lower registers"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/apic: Fix signedness bug in APIC ID validity checks
x86/cpu: Prevent cpuinfo_x86::x86_phys_bits adjustment corruption
x86/olpc: Fix inconsistent MFD_CS5535 configuration
swiotlb: Use dma_direct_supported() for swiotlb_ops
syscalls/x86: Adapt syscall_wrapper.h to the new syscall stub naming convention
syscalls/core, syscalls/x86: Rename struct pt_regs-based sys_*() to __x64_sys_*()
syscalls/core, syscalls/x86: Clean up compat syscall stub naming convention
syscalls/core, syscalls/x86: Clean up syscall stub naming convention
syscalls/x86: Extend register clearing on syscall entry to lower registers
syscalls/x86: Unconditionally enable 'struct pt_regs' based syscalls on x86_64
syscalls/x86: Use 'struct pt_regs' based syscall calling for IA32_EMULATION and x32
syscalls/core: Prepare CONFIG_ARCH_HAS_SYSCALL_WRAPPER=y for compat syscalls
syscalls/x86: Use 'struct pt_regs' based syscall calling convention for 64-bit syscalls
syscalls/core: Introduce CONFIG_ARCH_HAS_SYSCALL_WRAPPER=y
x86/syscalls: Don't pointlessly reload the system call number
x86/mm: Fix documentation of module mapping range with 4-level paging
x86/cpuid: Switch to 'static const' specifier
Diffstat (limited to 'arch/x86/entry/syscall_32.c')
-rw-r--r-- | arch/x86/entry/syscall_32.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/arch/x86/entry/syscall_32.c b/arch/x86/entry/syscall_32.c index 95c294963612..aa3336a7cb15 100644 --- a/arch/x86/entry/syscall_32.c +++ b/arch/x86/entry/syscall_32.c @@ -7,14 +7,23 @@ #include <asm/asm-offsets.h> #include <asm/syscall.h> -#define __SYSCALL_I386(nr, sym, qual) extern asmlinkage long sym(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long) ; +#ifdef CONFIG_IA32_EMULATION +/* On X86_64, we use struct pt_regs * to pass parameters to syscalls */ +#define __SYSCALL_I386(nr, sym, qual) extern asmlinkage long sym(const struct pt_regs *); + +/* this is a lie, but it does not hurt as sys_ni_syscall just returns -EINVAL */ +extern asmlinkage long sys_ni_syscall(const struct pt_regs *); + +#else /* CONFIG_IA32_EMULATION */ +#define __SYSCALL_I386(nr, sym, qual) extern asmlinkage long sym(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long); +extern asmlinkage long sys_ni_syscall(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long); +#endif /* CONFIG_IA32_EMULATION */ + #include <asm/syscalls_32.h> #undef __SYSCALL_I386 #define __SYSCALL_I386(nr, sym, qual) [nr] = sym, -extern asmlinkage long sys_ni_syscall(unsigned long, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long); - __visible const sys_call_ptr_t ia32_sys_call_table[__NR_syscall_compat_max+1] = { /* * Smells like a compiler bug -- it doesn't work |