x86: get rid of pt_regs argument in sigreturn variants
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/arch/x86/ia32/ia32_signal.c b/arch/x86/ia32/ia32_signal.c
index a1daf4a..15fdb3f 100644
--- a/arch/x86/ia32/ia32_signal.c
+++ b/arch/x86/ia32/ia32_signal.c
@@ -215,8 +215,9 @@
return err;
}
-asmlinkage long sys32_sigreturn(struct pt_regs *regs)
+asmlinkage long sys32_sigreturn(void)
{
+ struct pt_regs *regs = current_pt_regs();
struct sigframe_ia32 __user *frame = (struct sigframe_ia32 __user *)(regs->sp-8);
sigset_t set;
unsigned int ax;
@@ -241,8 +242,9 @@
return 0;
}
-asmlinkage long sys32_rt_sigreturn(struct pt_regs *regs)
+asmlinkage long sys32_rt_sigreturn(void)
{
+ struct pt_regs *regs = current_pt_regs();
struct rt_sigframe_ia32 __user *frame;
sigset_t set;
unsigned int ax;
diff --git a/arch/x86/ia32/ia32entry.S b/arch/x86/ia32/ia32entry.S
index 74bc91e..c05e16b 100644
--- a/arch/x86/ia32/ia32entry.S
+++ b/arch/x86/ia32/ia32entry.S
@@ -456,17 +456,16 @@
ALIGN
GLOBAL(\label)
leaq \func(%rip),%rax
- leaq -ARGOFFSET+8(%rsp),\arg /* 8 for return address */
jmp ia32_ptregs_common
.endm
CFI_STARTPROC32
- PTREGSCALL stub32_rt_sigreturn, sys32_rt_sigreturn, %rdi
- PTREGSCALL stub32_sigreturn, sys32_sigreturn, %rdi
- PTREGSCALL stub32_execve, compat_sys_execve, %rcx
- PTREGSCALL stub32_fork, sys_fork, %rdi
- PTREGSCALL stub32_vfork, sys_vfork, %rdi
+ PTREGSCALL stub32_rt_sigreturn, sys32_rt_sigreturn
+ PTREGSCALL stub32_sigreturn, sys32_sigreturn
+ PTREGSCALL stub32_execve, compat_sys_execve
+ PTREGSCALL stub32_fork, sys_fork
+ PTREGSCALL stub32_vfork, sys_vfork
ALIGN
GLOBAL(stub32_clone)
diff --git a/arch/x86/include/asm/sys_ia32.h b/arch/x86/include/asm/sys_ia32.h
index 31f61f9..93e142a 100644
--- a/arch/x86/include/asm/sys_ia32.h
+++ b/arch/x86/include/asm/sys_ia32.h
@@ -69,8 +69,8 @@
/* ia32/ia32_signal.c */
asmlinkage long sys32_sigsuspend(int, int, old_sigset_t);
-asmlinkage long sys32_sigreturn(struct pt_regs *);
-asmlinkage long sys32_rt_sigreturn(struct pt_regs *);
+asmlinkage long sys32_sigreturn(void);
+asmlinkage long sys32_rt_sigreturn(void);
/* ia32/ipc32.c */
asmlinkage long sys32_ipc(u32, int, int, int, compat_uptr_t, u32);
diff --git a/arch/x86/include/asm/syscalls.h b/arch/x86/include/asm/syscalls.h
index 76be6f2..de2e1ab 100644
--- a/arch/x86/include/asm/syscalls.h
+++ b/arch/x86/include/asm/syscalls.h
@@ -24,7 +24,7 @@
asmlinkage int sys_modify_ldt(int, void __user *, unsigned long);
/* kernel/signal.c */
-long sys_rt_sigreturn(struct pt_regs *);
+long sys_rt_sigreturn(void);
/* kernel/tls.c */
asmlinkage int sys_set_thread_area(struct user_desc __user *);
@@ -37,7 +37,7 @@
asmlinkage int sys_sigsuspend(int, int, old_sigset_t);
asmlinkage int sys_sigaction(int, const struct old_sigaction __user *,
struct old_sigaction __user *);
-unsigned long sys_sigreturn(struct pt_regs *);
+unsigned long sys_sigreturn(void);
/* kernel/vm86_32.c */
int sys_vm86old(struct vm86_struct __user *, struct pt_regs *);
diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S
index 415c634..e132cf6 100644
--- a/arch/x86/kernel/entry_32.S
+++ b/arch/x86/kernel/entry_32.S
@@ -702,12 +702,6 @@
/*
* System calls that need a pt_regs pointer.
*/
-#define PTREGSCALL0(name) \
-ENTRY(ptregs_##name) ; \
- leal 4(%esp),%eax; \
- jmp sys_##name; \
-ENDPROC(ptregs_##name)
-
#define PTREGSCALL1(name) \
ENTRY(ptregs_##name) ; \
leal 4(%esp),%edx; \
@@ -723,23 +717,6 @@
jmp sys_##name; \
ENDPROC(ptregs_##name)
-#define PTREGSCALL3(name) \
-ENTRY(ptregs_##name) ; \
- CFI_STARTPROC; \
- leal 4(%esp),%eax; \
- pushl_cfi %eax; \
- movl PT_EDX(%eax),%ecx; \
- movl PT_ECX(%eax),%edx; \
- movl PT_EBX(%eax),%eax; \
- call sys_##name; \
- addl $4,%esp; \
- CFI_ADJUST_CFA_OFFSET -4; \
- ret; \
- CFI_ENDPROC; \
-ENDPROC(ptregs_##name)
-
-PTREGSCALL0(sigreturn)
-PTREGSCALL0(rt_sigreturn)
PTREGSCALL2(vm86)
PTREGSCALL1(vm86old)
diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S
index 4486fee..1975122 100644
--- a/arch/x86/kernel/entry_64.S
+++ b/arch/x86/kernel/entry_64.S
@@ -896,7 +896,6 @@
addq $8, %rsp
PARTIAL_FRAME 0
SAVE_REST
- movq %rsp,%rdi
FIXUP_TOP_OF_STACK %r11
call sys_rt_sigreturn
movq %rax,RAX(%rsp) # fixme, this could be done at the higher layer
@@ -911,7 +910,6 @@
addq $8, %rsp
PARTIAL_FRAME 0
SAVE_REST
- movq %rsp,%rdi
FIXUP_TOP_OF_STACK %r11
call sys32_x32_rt_sigreturn
movq %rax,RAX(%rsp) # fixme, this could be done at the higher layer
diff --git a/arch/x86/kernel/signal.c b/arch/x86/kernel/signal.c
index d6bf1f3..38ba7e5 100644
--- a/arch/x86/kernel/signal.c
+++ b/arch/x86/kernel/signal.c
@@ -597,8 +597,9 @@
* Do a signal return; undo the signal stack.
*/
#ifdef CONFIG_X86_32
-unsigned long sys_sigreturn(struct pt_regs *regs)
+unsigned long sys_sigreturn(void)
{
+ struct pt_regs *regs = current_pt_regs();
struct sigframe __user *frame;
unsigned long ax;
sigset_t set;
@@ -625,8 +626,9 @@
}
#endif /* CONFIG_X86_32 */
-long sys_rt_sigreturn(struct pt_regs *regs)
+long sys_rt_sigreturn(void)
{
+ struct pt_regs *regs = current_pt_regs();
struct rt_sigframe __user *frame;
unsigned long ax;
sigset_t set;
@@ -843,8 +845,9 @@
}
#ifdef CONFIG_X86_X32_ABI
-asmlinkage long sys32_x32_rt_sigreturn(struct pt_regs *regs)
+asmlinkage long sys32_x32_rt_sigreturn(void)
{
+ struct pt_regs *regs = current_pt_regs();
struct rt_sigframe_x32 __user *frame;
sigset_t set;
unsigned long ax;
diff --git a/arch/x86/syscalls/syscall_32.tbl b/arch/x86/syscalls/syscall_32.tbl
index aa15a7a..4e8ab08 100644
--- a/arch/x86/syscalls/syscall_32.tbl
+++ b/arch/x86/syscalls/syscall_32.tbl
@@ -125,7 +125,7 @@
116 i386 sysinfo sys_sysinfo compat_sys_sysinfo
117 i386 ipc sys_ipc sys32_ipc
118 i386 fsync sys_fsync
-119 i386 sigreturn ptregs_sigreturn stub32_sigreturn
+119 i386 sigreturn sys_sigreturn stub32_sigreturn
120 i386 clone sys_clone stub32_clone
121 i386 setdomainname sys_setdomainname
122 i386 uname sys_newuname
@@ -179,7 +179,7 @@
170 i386 setresgid sys_setresgid16
171 i386 getresgid sys_getresgid16
172 i386 prctl sys_prctl
-173 i386 rt_sigreturn ptregs_rt_sigreturn stub32_rt_sigreturn
+173 i386 rt_sigreturn sys_rt_sigreturn stub32_rt_sigreturn
174 i386 rt_sigaction sys_rt_sigaction sys32_rt_sigaction
175 i386 rt_sigprocmask sys_rt_sigprocmask
176 i386 rt_sigpending sys_rt_sigpending sys32_rt_sigpending
diff --git a/arch/x86/um/signal.c b/arch/x86/um/signal.c
index 71cef48..ae7319d 100644
--- a/arch/x86/um/signal.c
+++ b/arch/x86/um/signal.c
@@ -464,7 +464,7 @@
return 0;
}
-long sys_sigreturn(struct pt_regs *regs)
+long sys_sigreturn(void)
{
unsigned long sp = PT_REGS_SP(¤t->thread.regs);
struct sigframe __user *frame = (struct sigframe __user *)(sp - 8);
@@ -577,7 +577,7 @@
}
#endif
-long sys_rt_sigreturn(struct pt_regs *regs)
+long sys_rt_sigreturn(void)
{
unsigned long sp = PT_REGS_SP(¤t->thread.regs);
struct rt_sigframe __user *frame =
@@ -601,14 +601,3 @@
force_sig(SIGSEGV, current);
return 0;
}
-
-#ifdef CONFIG_X86_32
-long ptregs_sigreturn(void)
-{
- return sys_sigreturn(NULL);
-}
-long ptregs_rt_sigreturn(void)
-{
- return sys_rt_sigreturn(NULL);
-}
-#endif