mips: switch to generic sys_fork() and sys_clone()
we still need the wrappers to store callee-saved registers in
pt_regs, but once that done we can jump to kernel/fork.c variants.
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 7352acf..0772b5c 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -41,6 +41,7 @@
select HAVE_MOD_ARCH_SPECIFIC
select MODULES_USE_ELF_REL if MODULES
select MODULES_USE_ELF_RELA if MODULES && 64BIT
+ select CLONE_BACKWARDS
select GENERIC_SIGALTSTACK
select GENERIC_COMPAT_RT_SIGACTION
select GENERIC_COMPAT_RT_SIGQUEUEINFO
diff --git a/arch/mips/include/asm/sim.h b/arch/mips/include/asm/sim.h
index 0cd719f..9183180 100644
--- a/arch/mips/include/asm/sim.h
+++ b/arch/mips/include/asm/sim.h
@@ -20,10 +20,10 @@
#define save_static_function(symbol) \
__asm__( \
".text\n\t" \
- ".globl\t" #symbol "\n\t" \
+ ".globl\t__" #symbol "\n\t" \
".align\t2\n\t" \
- ".type\t" #symbol ", @function\n\t" \
- ".ent\t" #symbol ", 0\n" \
+ ".type\t__" #symbol ", @function\n\t" \
+ ".ent\t__" #symbol ", 0\n__" \
#symbol":\n\t" \
".frame\t$29, 0, $31\n\t" \
"sw\t$16,"__str(PT_R16)"($29)\t\t\t# save_static_function\n\t" \
@@ -35,9 +35,9 @@
"sw\t$22,"__str(PT_R22)"($29)\n\t" \
"sw\t$23,"__str(PT_R23)"($29)\n\t" \
"sw\t$30,"__str(PT_R30)"($29)\n\t" \
- "j\t_" #symbol "\n\t" \
- ".end\t" #symbol "\n\t" \
- ".size\t" #symbol",. - " #symbol)
+ "j\t" #symbol "\n\t" \
+ ".end\t__" #symbol "\n\t" \
+ ".size\t__" #symbol",. - __" #symbol)
#define nabi_no_regargs
@@ -48,10 +48,10 @@
#define save_static_function(symbol) \
__asm__( \
".text\n\t" \
- ".globl\t" #symbol "\n\t" \
+ ".globl\t__" #symbol "\n\t" \
".align\t2\n\t" \
- ".type\t" #symbol ", @function\n\t" \
- ".ent\t" #symbol ", 0\n" \
+ ".type\t__" #symbol ", @function\n\t" \
+ ".ent\t__" #symbol ", 0\n__" \
#symbol":\n\t" \
".frame\t$29, 0, $31\n\t" \
"sd\t$16,"__str(PT_R16)"($29)\t\t\t# save_static_function\n\t" \
@@ -63,9 +63,9 @@
"sd\t$22,"__str(PT_R22)"($29)\n\t" \
"sd\t$23,"__str(PT_R23)"($29)\n\t" \
"sd\t$30,"__str(PT_R30)"($29)\n\t" \
- "j\t_" #symbol "\n\t" \
- ".end\t" #symbol "\n\t" \
- ".size\t" #symbol",. - " #symbol)
+ "j\t" #symbol "\n\t" \
+ ".end\t__" #symbol "\n\t" \
+ ".size\t__" #symbol",. - __" #symbol)
#define nabi_no_regargs \
unsigned long __dummy0, \
diff --git a/arch/mips/include/asm/unistd.h b/arch/mips/include/asm/unistd.h
index 9e47cc1..06f6463 100644
--- a/arch/mips/include/asm/unistd.h
+++ b/arch/mips/include/asm/unistd.h
@@ -43,6 +43,8 @@
# ifdef CONFIG_MIPS32_O32
# define __ARCH_WANT_COMPAT_SYS_TIME
# endif
+#define __ARCH_WANT_SYS_FORK
+#define __ARCH_WANT_SYS_CLONE
/* whitelists for checksyscalls */
#define __IGNORE_select
diff --git a/arch/mips/kernel/linux32.c b/arch/mips/kernel/linux32.c
index 9df3e33..253bd8a 100644
--- a/arch/mips/kernel/linux32.c
+++ b/arch/mips/kernel/linux32.c
@@ -279,25 +279,6 @@
merge_64(len_a4, len_a5));
}
-save_static_function(sys32_clone);
-static int noinline __used
-_sys32_clone(nabi_no_regargs struct pt_regs regs)
-{
- unsigned long clone_flags;
- unsigned long newsp;
- int __user *parent_tidptr, *child_tidptr;
-
- clone_flags = regs.regs[4];
- newsp = regs.regs[5];
- parent_tidptr = (int __user *) regs.regs[6];
-
- /* Use __dummy4 instead of getting it off the stack, so that
- syscall() works. */
- child_tidptr = (int __user *) __dummy4;
- return do_fork(clone_flags, newsp, 0,
- parent_tidptr, child_tidptr);
-}
-
asmlinkage long sys32_lookup_dcookie(u32 a0, u32 a1, char __user *buf,
size_t len)
{
diff --git a/arch/mips/kernel/scall32-o32.S b/arch/mips/kernel/scall32-o32.S
index d20a4bc..80ff942 100644
--- a/arch/mips/kernel/scall32-o32.S
+++ b/arch/mips/kernel/scall32-o32.S
@@ -226,7 +226,7 @@
.macro syscalltable
sys sys_syscall 8 /* 4000 */
sys sys_exit 1
- sys sys_fork 0
+ sys __sys_fork 0
sys sys_read 3
sys sys_write 3
sys sys_open 3 /* 4005 */
@@ -344,7 +344,7 @@
sys sys_ipc 6
sys sys_fsync 1
sys sys_sigreturn 0
- sys sys_clone 0 /* 4120 */
+ sys __sys_clone 6 /* 4120 */
sys sys_setdomainname 2
sys sys_newuname 1
sys sys_ni_syscall 0 /* sys_modify_ldt */
diff --git a/arch/mips/kernel/scall64-64.S b/arch/mips/kernel/scall64-64.S
index b64f642..9444ad9 100644
--- a/arch/mips/kernel/scall64-64.S
+++ b/arch/mips/kernel/scall64-64.S
@@ -170,8 +170,8 @@
PTR sys_socketpair
PTR sys_setsockopt
PTR sys_getsockopt
- PTR sys_clone /* 5055 */
- PTR sys_fork
+ PTR __sys_clone /* 5055 */
+ PTR __sys_fork
PTR sys_execve
PTR sys_exit
PTR sys_wait4
diff --git a/arch/mips/kernel/scall64-n32.S b/arch/mips/kernel/scall64-n32.S
index 4b33546..3b18a8e 100644
--- a/arch/mips/kernel/scall64-n32.S
+++ b/arch/mips/kernel/scall64-n32.S
@@ -159,8 +159,8 @@
PTR sys_socketpair
PTR compat_sys_setsockopt
PTR sys_getsockopt
- PTR sys_clone /* 6055 */
- PTR sys_fork
+ PTR __sys_clone /* 6055 */
+ PTR __sys_fork
PTR compat_sys_execve
PTR sys_exit
PTR compat_sys_wait4
diff --git a/arch/mips/kernel/scall64-o32.S b/arch/mips/kernel/scall64-o32.S
index 78e1ef1..063cd0d 100644
--- a/arch/mips/kernel/scall64-o32.S
+++ b/arch/mips/kernel/scall64-o32.S
@@ -194,7 +194,7 @@
sys_call_table:
PTR sys32_syscall /* 4000 */
PTR sys_exit
- PTR sys_fork
+ PTR __sys_fork
PTR sys_read
PTR sys_write
PTR compat_sys_open /* 4005 */
@@ -312,7 +312,7 @@
PTR sys_32_ipc
PTR sys_fsync
PTR sys32_sigreturn
- PTR sys32_clone /* 4120 */
+ PTR __sys_clone /* 4120 */
PTR sys_setdomainname
PTR sys_newuname
PTR sys_ni_syscall /* sys_modify_ldt */
diff --git a/arch/mips/kernel/syscall.c b/arch/mips/kernel/syscall.c
index 28daa66..b32466a 100644
--- a/arch/mips/kernel/syscall.c
+++ b/arch/mips/kernel/syscall.c
@@ -83,41 +83,7 @@
}
save_static_function(sys_fork);
-static int __used noinline
-_sys_fork(nabi_no_regargs struct pt_regs regs)
-{
- return do_fork(SIGCHLD, 0, 0, NULL, NULL);
-}
-
save_static_function(sys_clone);
-static int __used noinline
-_sys_clone(nabi_no_regargs struct pt_regs regs)
-{
- unsigned long clone_flags;
- unsigned long newsp;
- int __user *parent_tidptr, *child_tidptr;
-
- clone_flags = regs.regs[4];
- newsp = regs.regs[5];
- parent_tidptr = (int __user *) regs.regs[6];
-#ifdef CONFIG_32BIT
- /* We need to fetch the fifth argument off the stack. */
- child_tidptr = NULL;
- if (clone_flags & (CLONE_CHILD_SETTID | CLONE_CHILD_CLEARTID)) {
- int __user *__user *usp = (int __user *__user *) regs.regs[29];
- if (regs.regs[2] == __NR_syscall) {
- if (get_user (child_tidptr, &usp[5]))
- return -EFAULT;
- }
- else if (get_user (child_tidptr, &usp[4]))
- return -EFAULT;
- }
-#else
- child_tidptr = (int __user *) regs.regs[8];
-#endif
- return do_fork(clone_flags, newsp, 0,
- parent_tidptr, child_tidptr);
-}
SYSCALL_DEFINE1(set_thread_area, unsigned long, addr)
{