diff options
Diffstat (limited to 'arch/arm64/kernel/signal32.c')
| -rw-r--r-- | arch/arm64/kernel/signal32.c | 37 |
1 files changed, 5 insertions, 32 deletions
diff --git a/arch/arm64/kernel/signal32.c b/arch/arm64/kernel/signal32.c index e393174fe859..e51bbe79f5b5 100644 --- a/arch/arm64/kernel/signal32.c +++ b/arch/arm64/kernel/signal32.c @@ -100,34 +100,6 @@ struct compat_rt_sigframe { #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP))) -/* - * For ARM syscalls, the syscall number has to be loaded into r7. - * We do not support an OABI userspace. - */ -#define MOV_R7_NR_SIGRETURN (0xe3a07000 | __NR_compat_sigreturn) -#define SVC_SYS_SIGRETURN (0xef000000 | __NR_compat_sigreturn) -#define MOV_R7_NR_RT_SIGRETURN (0xe3a07000 | __NR_compat_rt_sigreturn) -#define SVC_SYS_RT_SIGRETURN (0xef000000 | __NR_compat_rt_sigreturn) - -/* - * For Thumb syscalls, we also pass the syscall number via r7. We therefore - * need two 16-bit instructions. - */ -#define SVC_THUMB_SIGRETURN (((0xdf00 | __NR_compat_sigreturn) << 16) | \ - 0x2700 | __NR_compat_sigreturn) -#define SVC_THUMB_RT_SIGRETURN (((0xdf00 | __NR_compat_rt_sigreturn) << 16) | \ - 0x2700 | __NR_compat_rt_sigreturn) - -const compat_ulong_t aarch32_sigret_code[6] = { - /* - * AArch32 sigreturn code. - * We don't construct an OABI SWI - instead we just set the imm24 field - * to the EABI syscall number so that we create a sane disassembly. - */ - MOV_R7_NR_SIGRETURN, SVC_SYS_SIGRETURN, SVC_THUMB_SIGRETURN, - MOV_R7_NR_RT_SIGRETURN, SVC_SYS_RT_SIGRETURN, SVC_THUMB_RT_SIGRETURN, -}; - static inline int put_sigset_t(compat_sigset_t __user *uset, sigset_t *set) { compat_sigset_t cset; @@ -474,12 +446,13 @@ static void compat_setup_return(struct pt_regs *regs, struct k_sigaction *ka, /* Check if the handler is written for ARM or Thumb */ thumb = handler & 1; - if (thumb) { + if (thumb) spsr |= COMPAT_PSR_T_BIT; - spsr &= ~COMPAT_PSR_IT_MASK; - } else { + else spsr &= ~COMPAT_PSR_T_BIT; - } + + /* The IT state must be cleared for both ARM and Thumb-2 */ + spsr &= ~COMPAT_PSR_IT_MASK; if (ka->sa.sa_flags & SA_RESTORER) { retcode = ptr_to_compat(ka->sa.sa_restorer); |