Unverified Commit 0671c5b8 authored by Paul Burton's avatar Paul Burton
Browse files

MIPS: Wire up clone3 syscall 

Wire up the new clone3 syscall for MIPS, using save_static_function() to
generate a wrapper that saves registers $s0-$s7 prior to invoking the
generic sys_clone3 function just like we do for plain old clone.

Tested atop 64r6el_defconfig using o32, n32 & n64 builds of the simple
test program from:

  https://lore.kernel.org/lkml/20190716130631.tohj4ub54md25dys@brauner.io/



Signed-off-by: default avatarPaul Burton <paul.burton@mips.com>
Cc: Christian Brauner <christian@brauner.io>
Acked-by: default avatarChristian Brauner <christian.brauner@ubuntu.com>
Cc: linux-mips@vger.kernel.org
parent 0228ecf6

arch/mips/include/asm/unistd.h

+1 −0
Original line number Diff line number Diff line
@@ -52,6 +52,7 @@ 
# endif

#define __ARCH_WANT_SYS_FORK

#define __ARCH_WANT_SYS_CLONE

#define __ARCH_WANT_SYS_CLONE3



/* whitelists for checksyscalls */

#define __IGNORE_fadvise64_64

arch/mips/kernel/syscall.c

+1 −0
Original line number Diff line number Diff line
@@ -80,6 +80,7 @@ SYSCALL_DEFINE6(mips_mmap2, unsigned long, addr, unsigned long, len, 


save_static_function(sys_fork);

save_static_function(sys_clone);

save_static_function(sys_clone3);



SYSCALL_DEFINE1(set_thread_area, unsigned long, addr)

{

arch/mips/kernel/syscalls/syscall_n32.tbl

+1 −1
Original line number Diff line number Diff line
@@ -373,4 +373,4 @@ 
432	n32	fsmount				sys_fsmount

433	n32	fspick				sys_fspick

434	n32	pidfd_open			sys_pidfd_open

# 435 reserved for clone3
 
435	n32	clone3				__sys_clone3

arch/mips/kernel/syscalls/syscall_n64.tbl

+1 −1
Original line number Diff line number Diff line
@@ -349,4 +349,4 @@ 
432	n64	fsmount				sys_fsmount

433	n64	fspick				sys_fspick

434	n64	pidfd_open			sys_pidfd_open

# 435 reserved for clone3
 
435	n64	clone3				__sys_clone3

arch/mips/kernel/syscalls/syscall_o32.tbl

+1 −1
Original line number Diff line number Diff line
@@ -422,4 +422,4 @@ 
432	o32	fsmount				sys_fsmount

433	o32	fspick				sys_fspick

434	o32	pidfd_open			sys_pidfd_open

# 435 reserved for clone3
 
435	o32	clone3				__sys_clone3

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