diff options
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/include/asm/uaccess.h | 49 | ||||
| -rw-r--r-- | arch/mips/include/uapi/asm/shmbuf.h | 7 | ||||
| -rw-r--r-- | arch/mips/include/uapi/asm/signal.h | 2 | ||||
| -rw-r--r-- | arch/mips/kernel/unaligned.c | 17 |
4 files changed, 26 insertions, 49 deletions
diff --git a/arch/mips/include/asm/uaccess.h b/arch/mips/include/asm/uaccess.h index f8f74f9f5883..c0cede273c7c 100644 --- a/arch/mips/include/asm/uaccess.h +++ b/arch/mips/include/asm/uaccess.h @@ -19,6 +19,7 @@ #ifdef CONFIG_32BIT #define __UA_LIMIT 0x80000000UL +#define TASK_SIZE_MAX KSEG0 #define __UA_ADDR ".word" #define __UA_LA "la" @@ -33,6 +34,7 @@ extern u64 __ua_limit; #define __UA_LIMIT __ua_limit +#define TASK_SIZE_MAX XKSSEG #define __UA_ADDR ".dword" #define __UA_LA "dla" @@ -42,50 +44,7 @@ extern u64 __ua_limit; #endif /* CONFIG_64BIT */ -/* - * Is a address valid? This does a straightforward calculation rather - * than tests. - * - * Address valid if: - * - "addr" doesn't have any high-bits set - * - AND "size" doesn't have any high-bits set - * - AND "addr+size" doesn't have any high-bits set - * - OR we are in kernel mode. - * - * __ua_size() is a trick to avoid runtime checking of positive constant - * sizes; for those we already know at compile time that the size is ok. - */ -#define __ua_size(size) \ - ((__builtin_constant_p(size) && (signed long) (size) > 0) ? 0 : (size)) - -/* - * access_ok: - Checks if a user space pointer is valid - * @addr: User space pointer to start of block to check - * @size: Size of block to check - * - * Context: User context only. This function may sleep if pagefaults are - * enabled. - * - * Checks if a pointer to a block of memory in user space is valid. - * - * Returns true (nonzero) if the memory block may be valid, false (zero) - * if it is definitely invalid. - * - * Note that, depending on architecture, this function probably just - * checks that the pointer is in the user space range - after calling - * this function, memory access functions may still return -EFAULT. - */ - -static inline int __access_ok(const void __user *p, unsigned long size) -{ - unsigned long addr = (unsigned long)p; - unsigned long end = addr + size - !!size; - - return (__UA_LIMIT & (addr | end | __ua_size(size))) == 0; -} - -#define access_ok(addr, size) \ - likely(__access_ok((addr), (size))) +#include <asm-generic/access_ok.h> /* * put_user: - Write a simple value into user space. @@ -296,8 +255,6 @@ struct __large_struct { unsigned long buf[100]; }; (val) = __gu_tmp.t; \ } -#define HAVE_GET_KERNEL_NOFAULT - #define __get_kernel_nofault(dst, src, type, err_label) \ do { \ int __gu_err; \ diff --git a/arch/mips/include/uapi/asm/shmbuf.h b/arch/mips/include/uapi/asm/shmbuf.h index 680bb95b2240..eb74d304b779 100644 --- a/arch/mips/include/uapi/asm/shmbuf.h +++ b/arch/mips/include/uapi/asm/shmbuf.h @@ -2,6 +2,9 @@ #ifndef _ASM_SHMBUF_H #define _ASM_SHMBUF_H +#include <asm/ipcbuf.h> +#include <asm/posix_types.h> + /* * The shmid64_ds structure for the MIPS architecture. * Note extra padding because this structure is passed back and forth @@ -16,7 +19,7 @@ #ifdef __mips64 struct shmid64_ds { struct ipc64_perm shm_perm; /* operation perms */ - size_t shm_segsz; /* size of segment (bytes) */ + __kernel_size_t shm_segsz; /* size of segment (bytes) */ long shm_atime; /* last attach time */ long shm_dtime; /* last detach time */ long shm_ctime; /* last change time */ @@ -29,7 +32,7 @@ struct shmid64_ds { #else struct shmid64_ds { struct ipc64_perm shm_perm; /* operation perms */ - size_t shm_segsz; /* size of segment (bytes) */ + __kernel_size_t shm_segsz; /* size of segment (bytes) */ unsigned long shm_atime; /* last attach time */ unsigned long shm_dtime; /* last detach time */ unsigned long shm_ctime; /* last change time */ diff --git a/arch/mips/include/uapi/asm/signal.h b/arch/mips/include/uapi/asm/signal.h index e6c78a15cb2f..94a00f82e373 100644 --- a/arch/mips/include/uapi/asm/signal.h +++ b/arch/mips/include/uapi/asm/signal.h @@ -100,7 +100,7 @@ struct sigaction { /* IRIX compatible stack_t */ typedef struct sigaltstack { void __user *ss_sp; - size_t ss_size; + __kernel_size_t ss_size; int ss_flags; } stack_t; diff --git a/arch/mips/kernel/unaligned.c b/arch/mips/kernel/unaligned.c index df4b708c04a9..7b5aba5df02e 100644 --- a/arch/mips/kernel/unaligned.c +++ b/arch/mips/kernel/unaligned.c @@ -1480,6 +1480,23 @@ asmlinkage void do_ade(struct pt_regs *regs) prev_state = exception_enter(); perf_sw_event(PERF_COUNT_SW_ALIGNMENT_FAULTS, 1, regs, regs->cp0_badvaddr); + +#ifdef CONFIG_64BIT + /* + * check, if we are hitting space between CPU implemented maximum + * virtual user address and 64bit maximum virtual user address + * and do exception handling to get EFAULTs for get_user/put_user + */ + if ((regs->cp0_badvaddr >= (1UL << cpu_vmbits)) && + (regs->cp0_badvaddr < XKSSEG)) { + if (fixup_exception(regs)) { + current->thread.cp0_baduaddr = regs->cp0_badvaddr; + return; + } + goto sigbus; + } +#endif + /* * Did we catch a fault trying to load an instruction? */ |