diff options
| -rw-r--r-- | arch/s390/include/asm/processor.h | 22 | ||||
| -rw-r--r-- | arch/s390/include/asm/ptrace.h | 4 | ||||
| -rw-r--r-- | arch/s390/kernel/signal.c | 5 | ||||
| -rw-r--r-- | arch/s390/mm/fault.c | 2 |
4 files changed, 29 insertions, 4 deletions
diff --git a/arch/s390/include/asm/processor.h b/arch/s390/include/asm/processor.h index a4b6229e5d4..306c93c1b18 100644 --- a/arch/s390/include/asm/processor.h +++ b/arch/s390/include/asm/processor.h @@ -187,7 +187,6 @@ static inline void __load_psw(psw_t psw) * Set PSW mask to specified value, while leaving the * PSW addr pointing to the next instruction. */ - static inline void __load_psw_mask (unsigned long mask) { unsigned long addr; @@ -212,6 +211,27 @@ static inline void __load_psw_mask (unsigned long mask) : "=&d" (addr), "=Q" (psw) : "Q" (psw) : "memory", "cc"); #endif /* __s390x__ */ } + +/* + * Rewind PSW instruction address by specified number of bytes. + */ +static inline unsigned long __rewind_psw(psw_t psw, unsigned long ilc) +{ +#ifndef __s390x__ + if (psw.addr & PSW_ADDR_AMODE) + /* 31 bit mode */ + return (psw.addr - ilc) | PSW_ADDR_AMODE; + /* 24 bit mode */ + return (psw.addr - ilc) & ((1UL << 24) - 1); +#else + unsigned long mask; + + mask = (psw.mask & PSW_MASK_EA) ? -1UL : + (psw.mask & PSW_MASK_BA) ? (1UL << 31) - 1 : + (1UL << 24) - 1; + return (psw.addr - ilc) & mask; +#endif +} /* * Function to stop a processor until an interruption occurred diff --git a/arch/s390/include/asm/ptrace.h b/arch/s390/include/asm/ptrace.h index 93c907b4776..2904cc66967 100644 --- a/arch/s390/include/asm/ptrace.h +++ b/arch/s390/include/asm/ptrace.h @@ -236,6 +236,8 @@ typedef struct #define PSW_MASK_ASC 0x0000C000UL #define PSW_MASK_CC 0x00003000UL #define PSW_MASK_PM 0x00000F00UL +#define PSW_MASK_EA 0x00000000UL +#define PSW_MASK_BA 0x00000000UL #define PSW_ADDR_AMODE 0x80000000UL #define PSW_ADDR_INSN 0x7FFFFFFFUL @@ -261,6 +263,8 @@ typedef struct #define PSW_MASK_ASC 0x0000C00000000000UL #define PSW_MASK_CC 0x0000300000000000UL #define PSW_MASK_PM 0x00000F0000000000UL +#define PSW_MASK_EA 0x0000000100000000UL +#define PSW_MASK_BA 0x0000000080000000UL #define PSW_ADDR_AMODE 0x0000000000000000UL #define PSW_ADDR_INSN 0xFFFFFFFFFFFFFFFFUL diff --git a/arch/s390/kernel/signal.c b/arch/s390/kernel/signal.c index e751cab80e0..058e372bada 100644 --- a/arch/s390/kernel/signal.c +++ b/arch/s390/kernel/signal.c @@ -447,8 +447,9 @@ void do_signal(struct pt_regs *regs) /* fallthrough */ case -ERESTARTNOINTR: regs->gprs[2] = regs->orig_gpr2; - regs->psw.addr = regs->psw.addr - - (regs->svc_code >> 16); + regs->psw.addr = + __rewind_psw(regs->psw, + regs->svc_code >> 16); break; } /* No longer in a system call */ diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c index 9564fc779b2..a90fd91a9c7 100644 --- a/arch/s390/mm/fault.c +++ b/arch/s390/mm/fault.c @@ -393,7 +393,7 @@ void __kprobes do_protection_exception(struct pt_regs *regs, long pgm_int_code, int fault; /* Protection exception is suppressing, decrement psw address. */ - regs->psw.addr -= (pgm_int_code >> 16); + regs->psw.addr = __rewind_psw(regs->psw, pgm_int_code >> 16); /* * Check for low-address protection. This needs to be treated * as a special case because the translation exception code |