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x86, 32-bit: Convert sys_vm86 & sys_vm86old 

Convert these to new PTREGSCALL stubs.

Signed-off-by: Brian Gerst <brgerst@gmail.com>
LKML-Reference: <1260403316-5679-6-git-send-email-brgerst@gmail.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Brian Gerst 2009-12-09 19:01:55 -05:00 committed by H. Peter Anvin
parent 052acad48a
commit f1382f157f
3 changed files with 9 additions and 10 deletions
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4
arch/x86/include/asm/syscalls.h
View File

@ -66,8 +66,8 @@ asmlinkage int sys_uname(struct old_utsname __user *);
asmlinkage int sys_olduname(struct oldold_utsname __user *);
/* kernel/vm86_32.c */
int sys_vm86old(struct pt_regs *);
int sys_vm86(struct pt_regs *);
int sys_vm86old(struct vm86_struct __user *, struct pt_regs *);
int sys_vm86(unsigned long, unsigned long, struct pt_regs *);
#else /* CONFIG_X86_32 */

4
arch/x86/kernel/entry_32.S
View File

@ -766,8 +766,8 @@ PTREGSCALL3(execve)
PTREGSCALL2(sigaltstack)
PTREGSCALL0(sigreturn)
PTREGSCALL0(rt_sigreturn)
PTREGSCALL0(vm86)
PTREGSCALL0(vm86old)
PTREGSCALL2(vm86)
PTREGSCALL1(vm86old)
.macro FIXUP_ESPFIX_STACK
/*

11
arch/x86/kernel/vm86_32.c
View File

@ -197,9 +197,8 @@ out:
static int do_vm86_irq_handling(int subfunction, int irqnumber);
static void do_sys_vm86(struct kernel_vm86_struct *info, struct task_struct *tsk);
int sys_vm86old(struct pt_regs *regs)
int sys_vm86old(struct vm86_struct __user *v86, struct pt_regs *regs)
{
struct vm86_struct __user *v86 = (struct vm86_struct __user *)regs->bx;
struct kernel_vm86_struct info; /* declare this _on top_,
* this avoids wasting of stack space.
* This remains on the stack until we
@ -227,7 +226,7 @@ out:
}
int sys_vm86(struct pt_regs *regs)
int sys_vm86(unsigned long cmd, unsigned long arg, struct pt_regs *regs)
{
struct kernel_vm86_struct info; /* declare this _on top_,
* this avoids wasting of stack space.
@ -239,12 +238,12 @@ int sys_vm86(struct pt_regs *regs)
struct vm86plus_struct __user *v86;
tsk = current;
switch (regs->bx) {
switch (cmd) {
case VM86_REQUEST_IRQ:
case VM86_FREE_IRQ:
case VM86_GET_IRQ_BITS:
case VM86_GET_AND_RESET_IRQ:
ret = do_vm86_irq_handling(regs->bx, (int)regs->cx);
ret = do_vm86_irq_handling(cmd, (int)arg);
goto out;
case VM86_PLUS_INSTALL_CHECK:
/*
@ -261,7 +260,7 @@ int sys_vm86(struct pt_regs *regs)
ret = -EPERM;
if (tsk->thread.saved_sp0)
goto out;
v86 = (struct vm86plus_struct __user *)regs->cx;
v86 = (struct vm86plus_struct __user *)arg;
tmp = copy_vm86_regs_from_user(&info.regs, &v86->regs,
offsetof(struct kernel_vm86_struct, regs32) -
sizeof(info.regs));