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x86: pass in pt_regs pointer for syscalls that need it

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Some syscalls need to access the pt_regs structure, either to copy
user register state or to modifiy it.  This patch adds stubs to load
the address of the pt_regs struct into the %eax register, and changes
the syscalls to regparm(1) to receive the pt_regs pointer as the
first argument.

Signed-off-by: Brian Gerst <brgerst@gmail.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Brian Gerst
2009-02-10 09:51:46 -05:00
committed by Ingo Molnar
parent aa78bcfa01
commit 253f29a4ae
8 changed files with 81 additions and 80 deletions
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25
arch/x86/include/asm/syscalls.h
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@@ -29,21 +29,26 @@ asmlinkage int sys_get_thread_area(struct user_desc __user *);
/* X86_32 only */
#ifdef CONFIG_X86_32
/* kernel/process_32.c */
asmlinkage int sys_fork(struct pt_regs);
asmlinkage int sys_clone(struct pt_regs);
asmlinkage int sys_vfork(struct pt_regs);
asmlinkage int sys_execve(struct pt_regs);
ptregscall int sys_fork(struct pt_regs *);
ptregscall int sys_clone(struct pt_regs *, unsigned long,
unsigned long, int __user *,
unsigned long, int __user *);
ptregscall int sys_vfork(struct pt_regs *);
ptregscall int sys_execve(struct pt_regs *, char __user *,
char __user * __user *,
char __user * __user *);
/* kernel/signal_32.c */
asmlinkage int sys_sigsuspend(int, int, old_sigset_t);
asmlinkage int sys_sigaction(int, const struct old_sigaction __user *,
struct old_sigaction __user *);
asmlinkage int sys_sigaltstack(unsigned long);
asmlinkage unsigned long sys_sigreturn(unsigned long);
asmlinkage int sys_rt_sigreturn(unsigned long);
ptregscall int sys_sigaltstack(struct pt_regs *, const stack_t __user *,
stack_t __user *);
ptregscall unsigned long sys_sigreturn(struct pt_regs *);
ptregscall int sys_rt_sigreturn(struct pt_regs *);
/* kernel/ioport.c */
asmlinkage long sys_iopl(unsigned long);
ptregscall long sys_iopl(struct pt_regs *, unsigned int);
/* kernel/sys_i386_32.c */
asmlinkage long sys_mmap2(unsigned long, unsigned long, unsigned long,
@@ -59,8 +64,8 @@ struct oldold_utsname;
asmlinkage int sys_olduname(struct oldold_utsname __user *);
/* kernel/vm86_32.c */
asmlinkage int sys_vm86old(struct pt_regs);
asmlinkage int sys_vm86(struct pt_regs);
ptregscall int sys_vm86old(struct pt_regs *, struct vm86_struct __user *);
ptregscall int sys_vm86(struct pt_regs *, unsigned long, unsigned long);
#else /* CONFIG_X86_32 */