diff options
| author | Sven Schnelle <svens@linux.ibm.com> | 2021-06-25 15:06:06 +0200 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2021-07-08 22:12:17 +0200 |
| commit | fbf50f47ea99d07aec59859027352d4837e84ce1 (patch) | |
| tree | 1d8aae4f639d404a5619c0739485002bde932f4c /arch/s390/kernel | |
| parent | df29a7440c4b5c65765c8f60396b3b13063e24e9 (diff) | |
s390/signal: remove sigreturn on stack
{rt_}sigreturn is now called from the vdso, so we no longer
need the svc on the stack, and therefore no hack to support that
mechanism on machines with non-executable stack.
Signed-off-by: Sven Schnelle <svens@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'arch/s390/kernel')
| -rw-r--r-- | arch/s390/kernel/syscall.c | 2 | ||||
| -rw-r--r-- | arch/s390/kernel/traps.c | 12 |
2 files changed, 2 insertions, 12 deletions
diff --git a/arch/s390/kernel/syscall.c b/arch/s390/kernel/syscall.c index c6b99da0738b..ec73d2c61e58 100644 --- a/arch/s390/kernel/syscall.c +++ b/arch/s390/kernel/syscall.c @@ -108,7 +108,7 @@ SYSCALL_DEFINE0(ni_syscall) return -ENOSYS; } -void do_syscall(struct pt_regs *regs) +static void do_syscall(struct pt_regs *regs) { unsigned long nr; diff --git a/arch/s390/kernel/traps.c b/arch/s390/kernel/traps.c index 3a6d08d6df6f..76947275fe8b 100644 --- a/arch/s390/kernel/traps.c +++ b/arch/s390/kernel/traps.c @@ -301,10 +301,9 @@ static void (*pgm_check_table[128])(struct pt_regs *regs); void noinstr __do_pgm_check(struct pt_regs *regs) { unsigned long last_break = S390_lowcore.breaking_event_addr; - unsigned int trapnr, syscall_redirect = 0; + unsigned int trapnr; irqentry_state_t state; - add_random_kstack_offset(); regs->int_code = *(u32 *)&S390_lowcore.pgm_ilc; regs->int_parm_long = S390_lowcore.trans_exc_code; @@ -346,18 +345,9 @@ void noinstr __do_pgm_check(struct pt_regs *regs) trapnr = regs->int_code & PGM_INT_CODE_MASK; if (trapnr) pgm_check_table[trapnr](regs); - syscall_redirect = user_mode(regs) && test_pt_regs_flag(regs, PIF_SYSCALL); out: local_irq_disable(); irqentry_exit(regs, state); - - if (syscall_redirect) { - enter_from_user_mode(regs); - local_irq_enable(); - regs->orig_gpr2 = regs->gprs[2]; - do_syscall(regs); - exit_to_user_mode(); - } } /* |