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Commit 50150d2b authored by Al Viro's avatar Al Viro
Browse files

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: default avatarAl Viro <viro@zeniv.linux.org.uk>
parent 64b3122d

arch/mips/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -41,6 +41,7 @@ config MIPS 
	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

arch/mips/include/asm/sim.h

+12 −12
Original line number Diff line number Diff line
@@ -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 @@ __asm__( \ 
	"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 @@ __asm__( \ 
#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 @@ __asm__( \ 
	"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,						\

arch/mips/include/asm/unistd.h

+2 −0
Original line number Diff line number Diff line
@@ -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

arch/mips/kernel/linux32.c

+0 −19
Original line number Diff line number Diff line
@@ -279,25 +279,6 @@ asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_a2, 
	                     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)

{

arch/mips/kernel/scall32-o32.S

+2 −2
Original line number Diff line number Diff line
@@ -226,7 +226,7 @@ einval: li v0, -ENOSYS 
	.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 @@ einval: li v0, -ENOSYS 
	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 */