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sh: Add SECCOMP_FILTER

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Port sh to use the new SECCOMP_FILTER code.

Signed-off-by: Michael Karcher <kernel@mkarcher.dialup.fu-berlin.de>
Tested-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Signed-off-by: Rich Felker <dalias@libc.org>
This commit is contained in:
Michael Karcher 2020-07-23 01:13:21 +02:00 • committed by Rich Felker
parent 9d2ec8f68e
commit 0bb605c2c7
4 changed files with 13 additions and 3 deletions
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1
arch/sh/Kconfig
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@ -28,6 +28,7 @@ config SUPERH
select GUP_GET_PTE_LOW_HIGH if X2TLB
select HAVE_ARCH_AUDITSYSCALL
select HAVE_ARCH_KGDB
select HAVE_ARCH_SECCOMP_FILTER
select HAVE_ARCH_TRACEHOOK
select HAVE_COPY_THREAD_TLS
select HAVE_DEBUG_BUGVERBOSE

2
arch/sh/kernel/entry-common.S
View file

@ -368,6 +368,8 @@ syscall_trace_entry:
mov.l 7f, r11 ! Call do_syscall_trace_enter which notifies
jsr @r11 ! superior (will chomp R[0-7])
nop
cmp/eq #-1, r0
bt syscall_exit
mov.l r0, @(OFF_R0,r15) ! Save return value
! Reload R0-R4 from kernel stack, where the
! parent may have modified them using

5
arch/sh/kernel/ptrace_32.c
View file

@ -485,8 +485,6 @@ asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
{
long ret = 0;
secure_computing_strict(regs->regs[0]);
if (test_thread_flag(TIF_SYSCALL_TRACE) &&
tracehook_report_syscall_entry(regs))
/*
@ -496,6 +494,9 @@ asmlinkage long do_syscall_trace_enter(struct pt_regs *regs)
*/
ret = -1L;
if (secure_computing() == -1)
return -1;
if (unlikely(test_thread_flag(TIF_SYSCALL_TRACEPOINT)))
trace_sys_enter(regs, regs->regs[0]);

8
tools/testing/selftests/seccomp/seccomp_bpf.c
View file

@ -122,6 +122,8 @@ struct seccomp_data {
# define __NR_seccomp 358
# elif defined(__s390__)
# define __NR_seccomp 348
# elif defined(__sh__)
# define __NR_seccomp 372
# else
# warning "seccomp syscall number unknown for this architecture"
# define __NR_seccomp 0xffff
@ -1622,6 +1624,10 @@ TEST_F(TRACE_poke, getpid_runs_normally)
# define SYSCALL_SYSCALL_NUM regs[4]
# define SYSCALL_RET regs[2]
# define SYSCALL_NUM_RET_SHARE_REG
#elif defined(__sh__)
# define ARCH_REGS struct pt_regs
# define SYSCALL_NUM gpr[3]
# define SYSCALL_RET gpr[0]
#else
# error "Do not know how to find your architecture's registers and syscalls"
#endif
@ -1693,7 +1699,7 @@ void change_syscall(struct __test_metadata *_metadata,
EXPECT_EQ(0, ret) {}
#if defined(__x86_64__) || defined(__i386__) || defined(__powerpc__) || \
defined(__s390__) || defined(__hppa__) || defined(__riscv)
defined(__s390__) || defined(__hppa__) || defined(__riscv) || defined(__sh__)
{
regs.SYSCALL_NUM = syscall;
}