diff options
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/ia32/syscall32.c | 45 |
1 files changed, 24 insertions, 21 deletions
diff --git a/arch/x86/ia32/syscall32.c b/arch/x86/ia32/syscall32.c index 15013bac181..d751d96c2ef 100644 --- a/arch/x86/ia32/syscall32.c +++ b/arch/x86/ia32/syscall32.c @@ -1,8 +1,9 @@ -/* Copyright 2002,2003 Andi Kleen, SuSE Labs */ - -/* vsyscall handling for 32bit processes. Map a stub page into it - on demand because 32bit cannot reach the kernel's fixmaps */ - +/* + * Copyright 2002,2003 Andi Kleen, SuSE Labs + * + * vsyscall handling for 32bit processes. Map a stub page into it on + * demand because 32bit cannot reach the kernel's fixmaps + */ #include <linux/mm.h> #include <linux/string.h> #include <linux/kernel.h> @@ -50,31 +51,33 @@ int syscall32_setup_pages(struct linux_binprm *bprm, int exstack) } static int __init init_syscall32(void) -{ +{ char *syscall32_page = (void *)get_zeroed_page(GFP_KERNEL); - if (!syscall32_page) - panic("Cannot allocate syscall32 page"); + + if (!syscall32_page) + panic("Cannot allocate syscall32 page"); syscall32_pages[0] = virt_to_page(syscall32_page); - if (use_sysenter > 0) { - memcpy(syscall32_page, syscall32_sysenter, - syscall32_sysenter_end - syscall32_sysenter); - } else { - memcpy(syscall32_page, syscall32_syscall, - syscall32_syscall_end - syscall32_syscall); - } + if (use_sysenter > 0) { + memcpy(syscall32_page, syscall32_sysenter, + syscall32_sysenter_end - syscall32_sysenter); + } else { + memcpy(syscall32_page, syscall32_syscall, + syscall32_syscall_end - syscall32_syscall); + } return 0; -} - -__initcall(init_syscall32); +} +__initcall(init_syscall32); /* May not be __init: called during resume */ void syscall32_cpu_init(void) { if (use_sysenter < 0) - use_sysenter = (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL); + use_sysenter = (boot_cpu_data.x86_vendor == X86_VENDOR_INTEL); - /* Load these always in case some future AMD CPU supports - SYSENTER from compat mode too. */ + /* + * Load these always in case some future AMD CPU supports + * SYSENTER from compat mode too. + */ checking_wrmsrl(MSR_IA32_SYSENTER_CS, (u64)__KERNEL_CS); checking_wrmsrl(MSR_IA32_SYSENTER_ESP, 0ULL); checking_wrmsrl(MSR_IA32_SYSENTER_EIP, (u64)ia32_sysenter_target); |