Commit-ID: 1342635638cba9b7c8eac776da5e54390d14d313 Gitweb: http://git.kernel.org/tip/1342635638cba9b7c8eac776da5e54390d14d313 Author: Brian Gerst <brge...@gmail.com> AuthorDate: Wed, 29 Jul 2015 01:41:22 -0400 Committer: Ingo Molnar <mi...@kernel.org> CommitDate: Fri, 31 Jul 2015 13:31:11 +0200
x86/vm86: Rename vm86->vm86_info to user_vm86 Make it clearer that this is the pointer to the userspace vm86 state area. Signed-off-by: Brian Gerst <brge...@gmail.com> Cc: Andy Lutomirski <l...@amacapital.net> Cc: Borislav Petkov <b...@alien8.de> Cc: Denys Vlasenko <dvlas...@redhat.com> Cc: H. Peter Anvin <h...@zytor.com> Cc: Linus Torvalds <torva...@linux-foundation.org> Cc: Peter Zijlstra <pet...@infradead.org> Cc: Thomas Gleixner <t...@linutronix.de> Link: http://lkml.kernel.org/r/1438148483-11932-8-git-send-email-brge...@gmail.com Signed-off-by: Ingo Molnar <mi...@kernel.org> --- arch/x86/include/asm/vm86.h | 2 +- arch/x86/kernel/vm86_32.c | 70 +++++++++++++++++++++++---------------------- 2 files changed, 37 insertions(+), 35 deletions(-) diff --git a/arch/x86/include/asm/vm86.h b/arch/x86/include/asm/vm86.h index b063196..c93ae73 100644 --- a/arch/x86/include/asm/vm86.h +++ b/arch/x86/include/asm/vm86.h @@ -28,7 +28,7 @@ struct kernel_vm86_regs { }; struct vm86 { - struct vm86plus_struct __user *vm86_info; + struct vm86plus_struct __user *user_vm86; struct pt_regs regs32; unsigned long v86flags; unsigned long v86mask; diff --git a/arch/x86/kernel/vm86_32.c b/arch/x86/kernel/vm86_32.c index 0de1f66..52aa33e 100644 --- a/arch/x86/kernel/vm86_32.c +++ b/arch/x86/kernel/vm86_32.c @@ -104,17 +104,17 @@ void save_v86_state(struct kernel_vm86_regs *regs, int retval) */ local_irq_enable(); - if (!vm86 || !vm86->vm86_info) { - pr_alert("no vm86_info: BAD\n"); + if (!vm86 || !vm86->user_vm86) { + pr_alert("no user_vm86: BAD\n"); do_exit(SIGSEGV); } set_flags(regs->pt.flags, VEFLAGS, X86_EFLAGS_VIF | vm86->v86mask); - user = vm86->vm86_info; + user = vm86->user_vm86; if (!access_ok(VERIFY_WRITE, user, vm86->vm86plus.is_vm86pus ? sizeof(struct vm86plus_struct) : sizeof(struct vm86_struct))) { - pr_alert("could not access userspace vm86_info\n"); + pr_alert("could not access userspace vm86 info\n"); do_exit(SIGSEGV); } @@ -139,7 +139,7 @@ void save_v86_state(struct kernel_vm86_regs *regs, int retval) put_user_ex(vm86->screen_bitmap, &user->screen_bitmap); } put_user_catch(err); if (err) { - pr_alert("could not access userspace vm86_info\n"); + pr_alert("could not access userspace vm86 info\n"); do_exit(SIGSEGV); } @@ -192,11 +192,11 @@ out: static int do_vm86_irq_handling(int subfunction, int irqnumber); -static long do_sys_vm86(struct vm86plus_struct __user *v86, bool plus); +static long do_sys_vm86(struct vm86plus_struct __user *user_vm86, bool plus); -SYSCALL_DEFINE1(vm86old, struct vm86_struct __user *, v86) +SYSCALL_DEFINE1(vm86old, struct vm86_struct __user *, user_vm86) { - return do_sys_vm86((struct vm86plus_struct __user *) v86, false); + return do_sys_vm86((struct vm86plus_struct __user *) user_vm86, false); } @@ -223,7 +223,7 @@ SYSCALL_DEFINE2(vm86, unsigned long, cmd, unsigned long, arg) } -static long do_sys_vm86(struct vm86plus_struct __user *v86, bool plus) +static long do_sys_vm86(struct vm86plus_struct __user *user_vm86, bool plus) { struct tss_struct *tss; struct task_struct *tsk = current; @@ -240,7 +240,7 @@ static long do_sys_vm86(struct vm86plus_struct __user *v86, bool plus) if (vm86->saved_sp0) return -EPERM; - if (!access_ok(VERIFY_READ, v86, plus ? + if (!access_ok(VERIFY_READ, user_vm86, plus ? sizeof(struct vm86_struct) : sizeof(struct vm86plus_struct))) return -EFAULT; @@ -248,40 +248,42 @@ static long do_sys_vm86(struct vm86plus_struct __user *v86, bool plus) memset(&vm86regs, 0, sizeof(vm86regs)); get_user_try { unsigned short seg; - get_user_ex(vm86regs.pt.bx, &v86->regs.ebx); - get_user_ex(vm86regs.pt.cx, &v86->regs.ecx); - get_user_ex(vm86regs.pt.dx, &v86->regs.edx); - get_user_ex(vm86regs.pt.si, &v86->regs.esi); - get_user_ex(vm86regs.pt.di, &v86->regs.edi); - get_user_ex(vm86regs.pt.bp, &v86->regs.ebp); - get_user_ex(vm86regs.pt.ax, &v86->regs.eax); - get_user_ex(vm86regs.pt.ip, &v86->regs.eip); - get_user_ex(seg, &v86->regs.cs); + get_user_ex(vm86regs.pt.bx, &user_vm86->regs.ebx); + get_user_ex(vm86regs.pt.cx, &user_vm86->regs.ecx); + get_user_ex(vm86regs.pt.dx, &user_vm86->regs.edx); + get_user_ex(vm86regs.pt.si, &user_vm86->regs.esi); + get_user_ex(vm86regs.pt.di, &user_vm86->regs.edi); + get_user_ex(vm86regs.pt.bp, &user_vm86->regs.ebp); + get_user_ex(vm86regs.pt.ax, &user_vm86->regs.eax); + get_user_ex(vm86regs.pt.ip, &user_vm86->regs.eip); + get_user_ex(seg, &user_vm86->regs.cs); vm86regs.pt.cs = seg; - get_user_ex(vm86regs.pt.flags, &v86->regs.eflags); - get_user_ex(vm86regs.pt.sp, &v86->regs.esp); - get_user_ex(seg, &v86->regs.ss); + get_user_ex(vm86regs.pt.flags, &user_vm86->regs.eflags); + get_user_ex(vm86regs.pt.sp, &user_vm86->regs.esp); + get_user_ex(seg, &user_vm86->regs.ss); vm86regs.pt.ss = seg; - get_user_ex(vm86regs.es, &v86->regs.es); - get_user_ex(vm86regs.ds, &v86->regs.ds); - get_user_ex(vm86regs.fs, &v86->regs.fs); - get_user_ex(vm86regs.gs, &v86->regs.gs); - - get_user_ex(vm86->flags, &v86->flags); - get_user_ex(vm86->screen_bitmap, &v86->screen_bitmap); - get_user_ex(vm86->cpu_type, &v86->cpu_type); + get_user_ex(vm86regs.es, &user_vm86->regs.es); + get_user_ex(vm86regs.ds, &user_vm86->regs.ds); + get_user_ex(vm86regs.fs, &user_vm86->regs.fs); + get_user_ex(vm86regs.gs, &user_vm86->regs.gs); + + get_user_ex(vm86->flags, &user_vm86->flags); + get_user_ex(vm86->screen_bitmap, &user_vm86->screen_bitmap); + get_user_ex(vm86->cpu_type, &user_vm86->cpu_type); } get_user_catch(err); if (err) return err; - if (copy_from_user(&vm86->int_revectored, &v86->int_revectored, + if (copy_from_user(&vm86->int_revectored, + &user_vm86->int_revectored, sizeof(struct revectored_struct))) return -EFAULT; - if (copy_from_user(&vm86->int21_revectored, &v86->int21_revectored, + if (copy_from_user(&vm86->int21_revectored, + &user_vm86->int21_revectored, sizeof(struct revectored_struct))) return -EFAULT; if (plus) { - if (copy_from_user(&vm86->vm86plus, &v86->vm86plus, + if (copy_from_user(&vm86->vm86plus, &user_vm86->vm86plus, sizeof(struct vm86plus_info_struct))) return -EFAULT; vm86->vm86plus.is_vm86pus = 1; @@ -290,7 +292,7 @@ static long do_sys_vm86(struct vm86plus_struct __user *v86, bool plus) sizeof(struct vm86plus_info_struct)); memcpy(&vm86->regs32, regs, sizeof(struct pt_regs)); - vm86->vm86_info = v86; + vm86->user_vm86 = user_vm86; /* * The flags register is also special: we cannot trust that the user -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
