diff options
Diffstat (limited to 'arch/parisc')
| -rw-r--r-- | arch/parisc/Kconfig | 8 | ||||
| -rw-r--r-- | arch/parisc/hpux/fs.c | 15 | ||||
| -rw-r--r-- | arch/parisc/include/asm/Kbuild | 32 | ||||
| -rw-r--r-- | arch/parisc/include/asm/barrier.h | 35 | ||||
| -rw-r--r-- | arch/parisc/include/asm/cacheflush.h | 2 | ||||
| -rw-r--r-- | arch/parisc/include/asm/elf.h | 4 | ||||
| -rw-r--r-- | arch/parisc/include/asm/page.h | 14 | ||||
| -rw-r--r-- | arch/parisc/include/asm/pgtable.h | 1 | ||||
| -rw-r--r-- | arch/parisc/include/asm/processor.h | 2 | ||||
| -rw-r--r-- | arch/parisc/include/asm/spinlock.h | 4 | ||||
| -rw-r--r-- | arch/parisc/include/asm/thread_info.h | 10 | ||||
| -rw-r--r-- | arch/parisc/include/uapi/asm/errno.h | 2 | ||||
| -rw-r--r-- | arch/parisc/include/uapi/asm/socket.h | 2 | ||||
| -rw-r--r-- | arch/parisc/include/uapi/asm/stat.h | 40 | ||||
| -rw-r--r-- | arch/parisc/include/uapi/asm/unistd.h | 6 | ||||
| -rw-r--r-- | arch/parisc/kernel/cache.c | 78 | ||||
| -rw-r--r-- | arch/parisc/kernel/drivers.c | 22 | ||||
| -rw-r--r-- | arch/parisc/kernel/irq.c | 2 | ||||
| -rw-r--r-- | arch/parisc/kernel/process.c | 21 | ||||
| -rw-r--r-- | arch/parisc/kernel/sys_parisc.c | 238 | ||||
| -rw-r--r-- | arch/parisc/kernel/syscall_table.S | 3 | ||||
| -rw-r--r-- | arch/parisc/mm/init.c | 59 |
22 files changed, 333 insertions, 267 deletions
diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig index 0821e835046d..1faefed32749 100644 --- a/arch/parisc/Kconfig +++ b/arch/parisc/Kconfig @@ -230,13 +230,13 @@ config SMP bool "Symmetric multi-processing support" ---help--- This enables support for systems with more than one CPU. If you have - a system with only one CPU, like most personal computers, say N. If - you have a system with more than one CPU, say Y. + a system with only one CPU, say N. If you have a system with more + than one CPU, say Y. - If you say N here, the kernel will run on single and multiprocessor + If you say N here, the kernel will run on uni- and multiprocessor machines, but will use only one CPU of a multiprocessor machine. If you say Y here, the kernel will run on many, but not all, - singleprocessor machines. On a singleprocessor machine, the kernel + uniprocessor machines. On a uniprocessor machine, the kernel will run faster if you say N here. See also <file:Documentation/nmi_watchdog.txt> and the SMP-HOWTO diff --git a/arch/parisc/hpux/fs.c b/arch/parisc/hpux/fs.c index 88d0962de65a..2bedafea3d94 100644 --- a/arch/parisc/hpux/fs.c +++ b/arch/parisc/hpux/fs.c @@ -33,22 +33,9 @@ int hpux_execve(struct pt_regs *regs) { - int error; - struct filename *filename; - - filename = getname((const char __user *) regs->gr[26]); - error = PTR_ERR(filename); - if (IS_ERR(filename)) - goto out; - - error = do_execve(filename->name, + return do_execve(getname((const char __user *) regs->gr[26]), (const char __user *const __user *) regs->gr[25], (const char __user *const __user *) regs->gr[24]); - - putname(filename); - -out: - return error; } struct hpux_dirent { diff --git a/arch/parisc/include/asm/Kbuild b/arch/parisc/include/asm/Kbuild index a603b9ebe54c..ecf25e6678ad 100644 --- a/arch/parisc/include/asm/Kbuild +++ b/arch/parisc/include/asm/Kbuild @@ -1,7 +1,29 @@ -generic-y += word-at-a-time.h auxvec.h user.h cputime.h emergency-restart.h \ - segment.h topology.h vga.h device.h percpu.h hw_irq.h mutex.h \ - div64.h irq_regs.h kdebug.h kvm_para.h local64.h local.h param.h \ - poll.h xor.h clkdev.h exec.h -generic-y += trace_clock.h +generic-y += auxvec.h +generic-y += barrier.h +generic-y += clkdev.h +generic-y += cputime.h +generic-y += device.h +generic-y += div64.h +generic-y += emergency-restart.h +generic-y += exec.h +generic-y += hash.h +generic-y += hw_irq.h +generic-y += irq_regs.h +generic-y += kdebug.h +generic-y += kvm_para.h +generic-y += local.h +generic-y += local64.h +generic-y += mcs_spinlock.h +generic-y += mutex.h +generic-y += param.h +generic-y += percpu.h +generic-y += poll.h generic-y += preempt.h +generic-y += segment.h +generic-y += topology.h +generic-y += trace_clock.h +generic-y += user.h +generic-y += vga.h +generic-y += word-at-a-time.h +generic-y += xor.h diff --git a/arch/parisc/include/asm/barrier.h b/arch/parisc/include/asm/barrier.h deleted file mode 100644 index e77d834aa803..000000000000 --- a/arch/parisc/include/asm/barrier.h +++ /dev/null @@ -1,35 +0,0 @@ -#ifndef __PARISC_BARRIER_H -#define __PARISC_BARRIER_H - -/* -** This is simply the barrier() macro from linux/kernel.h but when serial.c -** uses tqueue.h uses smp_mb() defined using barrier(), linux/kernel.h -** hasn't yet been included yet so it fails, thus repeating the macro here. -** -** PA-RISC architecture allows for weakly ordered memory accesses although -** none of the processors use it. There is a strong ordered bit that is -** set in the O-bit of the page directory entry. Operating systems that -** can not tolerate out of order accesses should set this bit when mapping -** pages. The O-bit of the PSW should also be set to 1 (I don't believe any -** of the processor implemented the PSW O-bit). The PCX-W ERS states that -** the TLB O-bit is not implemented so the page directory does not need to -** have the O-bit set when mapping pages (section 3.1). This section also -** states that the PSW Y, Z, G, and O bits are not implemented. -** So it looks like nothing needs to be done for parisc-linux (yet). -** (thanks to chada for the above comment -ggg) -** -** The __asm__ op below simple prevents gcc/ld from reordering -** instructions across the mb() "call". -*/ -#define mb() __asm__ __volatile__("":::"memory") /* barrier() */ -#define rmb() mb() -#define wmb() mb() -#define smp_mb() mb() -#define smp_rmb() mb() -#define smp_wmb() mb() -#define smp_read_barrier_depends() do { } while(0) -#define read_barrier_depends() do { } while(0) - -#define set_mb(var, value) do { var = value; mb(); } while (0) - -#endif /* __PARISC_BARRIER_H */ diff --git a/arch/parisc/include/asm/cacheflush.h b/arch/parisc/include/asm/cacheflush.h index 2f9b751878ba..de65f66ea64e 100644 --- a/arch/parisc/include/asm/cacheflush.h +++ b/arch/parisc/include/asm/cacheflush.h @@ -132,7 +132,6 @@ void mark_rodata_ro(void); static inline void *kmap(struct page *page) { might_sleep(); - flush_dcache_page(page); return page_address(page); } @@ -144,7 +143,6 @@ static inline void kunmap(struct page *page) static inline void *kmap_atomic(struct page *page) { pagefault_disable(); - flush_dcache_page(page); return page_address(page); } diff --git a/arch/parisc/include/asm/elf.h b/arch/parisc/include/asm/elf.h index ad2b50397894..3391d061eccc 100644 --- a/arch/parisc/include/asm/elf.h +++ b/arch/parisc/include/asm/elf.h @@ -348,4 +348,8 @@ struct pt_regs; /* forward declaration... */ #define ELF_HWCAP 0 +struct mm_struct; +extern unsigned long arch_randomize_brk(struct mm_struct *); +#define arch_randomize_brk arch_randomize_brk + #endif diff --git a/arch/parisc/include/asm/page.h b/arch/parisc/include/asm/page.h index c53fc63149e8..60d5d174dfe4 100644 --- a/arch/parisc/include/asm/page.h +++ b/arch/parisc/include/asm/page.h @@ -29,18 +29,8 @@ struct page; void clear_page_asm(void *page); void copy_page_asm(void *to, void *from); #define clear_user_page(vto, vaddr, page) clear_page_asm(vto) -#define copy_user_page(vto, vfrom, vaddr, page) copy_page_asm(vto, vfrom) - -/* #define CONFIG_PARISC_TMPALIAS */ - -#ifdef CONFIG_PARISC_TMPALIAS -void clear_user_highpage(struct page *page, unsigned long vaddr); -#define clear_user_highpage clear_user_highpage -struct vm_area_struct; -void copy_user_highpage(struct page *to, struct page *from, - unsigned long vaddr, struct vm_area_struct *vma); -#define __HAVE_ARCH_COPY_USER_HIGHPAGE -#endif +void copy_user_page(void *vto, void *vfrom, unsigned long vaddr, + struct page *pg); /* * These are used to make use of C type-checking.. diff --git a/arch/parisc/include/asm/pgtable.h b/arch/parisc/include/asm/pgtable.h index 34899b5d959a..22b89d1edba7 100644 --- a/arch/parisc/include/asm/pgtable.h +++ b/arch/parisc/include/asm/pgtable.h @@ -511,6 +511,7 @@ static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, /* We provide our own get_unmapped_area to provide cache coherency */ #define HAVE_ARCH_UNMAPPED_AREA +#define HAVE_ARCH_UNMAPPED_AREA_TOPDOWN #define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG #define __HAVE_ARCH_PTEP_GET_AND_CLEAR diff --git a/arch/parisc/include/asm/processor.h b/arch/parisc/include/asm/processor.h index cc2290a3cace..198a86feb574 100644 --- a/arch/parisc/include/asm/processor.h +++ b/arch/parisc/include/asm/processor.h @@ -30,6 +30,8 @@ #endif #define current_text_addr() ({ void *pc; current_ia(pc); pc; }) +#define HAVE_ARCH_PICK_MMAP_LAYOUT + #define TASK_SIZE_OF(tsk) ((tsk)->thread.task_size) #define TASK_SIZE TASK_SIZE_OF(current) #define TASK_UNMAPPED_BASE (current->thread.map_base) diff --git a/arch/parisc/include/asm/spinlock.h b/arch/parisc/include/asm/spinlock.h index 3516e0b27044..64f2992e439f 100644 --- a/arch/parisc/include/asm/spinlock.h +++ b/arch/parisc/include/asm/spinlock.h @@ -191,8 +191,4 @@ static __inline__ int arch_write_can_lock(arch_rwlock_t *rw) #define arch_read_lock_flags(lock, flags) arch_read_lock(lock) #define arch_write_lock_flags(lock, flags) arch_write_lock(lock) -#define arch_spin_relax(lock) cpu_relax() -#define arch_read_relax(lock) cpu_relax() -#define arch_write_relax(lock) cpu_relax() - #endif /* __ASM_SPINLOCK_H */ diff --git a/arch/parisc/include/asm/thread_info.h b/arch/parisc/include/asm/thread_info.h index d5f97ea3a4e1..4b9b10ce1f9d 100644 --- a/arch/parisc/include/asm/thread_info.h +++ b/arch/parisc/include/asm/thread_info.h @@ -76,6 +76,16 @@ struct thread_info { #define _TIF_SYSCALL_TRACE_MASK (_TIF_SYSCALL_TRACE | _TIF_SINGLESTEP | \ _TIF_BLOCKSTEP | _TIF_SYSCALL_AUDIT) +#ifdef CONFIG_64BIT +# ifdef CONFIG_COMPAT +# define is_32bit_task() (test_thread_flag(TIF_32BIT)) +# else +# define is_32bit_task() (0) +# endif +#else +# define is_32bit_task() (1) +#endif + #endif /* __KERNEL__ */ #endif /* _ASM_PARISC_THREAD_INFO_H */ diff --git a/arch/parisc/include/uapi/asm/errno.h b/arch/parisc/include/uapi/asm/errno.h index f3a8aa554841..c0ae62520d15 100644 --- a/arch/parisc/include/uapi/asm/errno.h +++ b/arch/parisc/include/uapi/asm/errno.h @@ -106,7 +106,7 @@ #define EALREADY 244 /* Operation already in progress */ #define EINPROGRESS 245 /* Operation now in progress */ -#define EWOULDBLOCK 246 /* Operation would block (Linux returns EAGAIN) */ +#define EWOULDBLOCK EAGAIN /* Operation would block (Not HPUX compliant) */ #define ENOTEMPTY 247 /* Directory not empty */ #define ENAMETOOLONG 248 /* File name too long */ #define ELOOP 249 /* Too many symbolic links encountered */ diff --git a/arch/parisc/include/uapi/asm/socket.h b/arch/parisc/include/uapi/asm/socket.h index 70b3674dac4e..fe35ceacf0e7 100644 --- a/arch/parisc/include/uapi/asm/socket.h +++ b/arch/parisc/include/uapi/asm/socket.h @@ -77,4 +77,6 @@ #define SO_MAX_PACING_RATE 0x4028 +#define SO_BPF_EXTENSIONS 0x4029 + #endif /* _UAPI_ASM_SOCKET_H */ diff --git a/arch/parisc/include/uapi/asm/stat.h b/arch/parisc/include/uapi/asm/stat.h index d76fbda5d62c..b606b366d0a7 100644 --- a/arch/parisc/include/uapi/asm/stat.h +++ b/arch/parisc/include/uapi/asm/stat.h @@ -5,67 +5,65 @@ struct stat { unsigned int st_dev; /* dev_t is 32 bits on parisc */ - ino_t st_ino; /* 32 bits */ - mode_t st_mode; /* 16 bits */ + unsigned int st_ino; /* 32 bits */ + unsigned short st_mode; /* 16 bits */ unsigned short st_nlink; /* 16 bits */ unsigned short st_reserved1; /* old st_uid */ unsigned short st_reserved2; /* old st_gid */ unsigned int st_rdev; - off_t st_size; - time_t st_atime; + signed int st_size; + signed int st_atime; unsigned int st_atime_nsec; - time_t st_mtime; + signed int st_mtime; unsigned int st_mtime_nsec; - time_t st_ctime; + signed int st_ctime; unsigned int st_ctime_nsec; int st_blksize; int st_blocks; unsigned int __unused1; /* ACL stuff */ unsigned int __unused2; /* network */ - ino_t __unused3; /* network */ + unsigned int __unused3; /* network */ unsigned int __unused4; /* cnodes */ unsigned short __unused5; /* netsite */ short st_fstype; unsigned int st_realdev; unsigned short st_basemode; unsigned short st_spareshort; - uid_t st_uid; - gid_t st_gid; + unsigned int st_uid; + unsigned int st_gid; unsigned int st_spare4[3]; }; #define STAT_HAVE_NSEC -typedef __kernel_off64_t off64_t; - struct hpux_stat64 { unsigned int st_dev; /* dev_t is 32 bits on parisc */ - ino_t st_ino; /* 32 bits */ - mode_t st_mode; /* 16 bits */ + unsigned int st_ino; /* 32 bits */ + unsigned short st_mode; /* 16 bits */ unsigned short st_nlink; /* 16 bits */ unsigned short st_reserved1; /* old st_uid */ unsigned short st_reserved2; /* old st_gid */ unsigned int st_rdev; - off64_t st_size; - time_t st_atime; + signed long long st_size; + signed int st_atime; unsigned int st_spare1; - time_t st_mtime; + signed int st_mtime; unsigned int st_spare2; - time_t st_ctime; + signed int st_ctime; unsigned int st_spare3; int st_blksize; - __u64 st_blocks; + unsigned long long st_blocks; unsigned int __unused1; /* ACL stuff */ unsigned int __unused2; /* network */ - ino_t __unused3; /* network */ + unsigned int __unused3; /* network */ unsigned int __unused4; /* cnodes */ unsigned short __unused5; /* netsite */ short st_fstype; unsigned int st_realdev; unsigned short st_basemode; unsigned short st_spareshort; - uid_t st_uid; - gid_t st_gid; + unsigned int st_uid; + unsigned int st_gid; unsigned int st_spare4[3]; }; diff --git a/arch/parisc/include/uapi/asm/unistd.h b/arch/parisc/include/uapi/asm/unistd.h index 2c8b9bde18eb..265ae5190b0a 100644 --- a/arch/parisc/include/uapi/asm/unistd.h +++ b/arch/parisc/include/uapi/asm/unistd.h @@ -826,13 +826,15 @@ #define __NR_process_vm_writev (__NR_Linux + 331) #define __NR_kcmp (__NR_Linux + 332) #define __NR_finit_module (__NR_Linux + 333) +#define __NR_sched_setattr (__NR_Linux + 334) +#define __NR_sched_getattr (__NR_Linux + 335) +#define __NR_utimes (__NR_Linux + 336) -#define __NR_Linux_syscalls (__NR_finit_module + 1) +#define __NR_Linux_syscalls (__NR_utimes + 1) #define __IGNORE_select /* newselect */ #define __IGNORE_fadvise64 /* fadvise64_64 */ -#define __IGNORE_utimes /* utime */ #define HPUX_GATEWAY_ADDR 0xC0000004 diff --git a/arch/parisc/kernel/cache.c b/arch/parisc/kernel/cache.c index a72545554a31..a6ffc775a9f8 100644 --- a/arch/parisc/kernel/cache.c +++ b/arch/parisc/kernel/cache.c @@ -388,6 +388,20 @@ void flush_kernel_dcache_page_addr(void *addr) } EXPORT_SYMBOL(flush_kernel_dcache_page_addr); +void copy_user_page(void *vto, void *vfrom, unsigned long vaddr, + struct page *pg) +{ + /* Copy using kernel mapping. No coherency is needed (all in + kunmap) for the `to' page. However, the `from' page needs to + be flushed through a mapping equivalent to the user mapping + before it can be accessed through the kernel mapping. */ + preempt_disable(); + flush_dcache_page_asm(__pa(vfrom), vaddr); + preempt_enable(); + copy_page_asm(vto, vfrom); +} +EXPORT_SYMBOL(copy_user_page); + void purge_tlb_entries(struct mm_struct *mm, unsigned long addr) { unsigned long flags; @@ -567,67 +581,3 @@ flush_cache_page(struct vm_area_struct *vma, unsigned long vmaddr, unsigned long __flush_cache_page(vma, vmaddr, PFN_PHYS(pfn)); } } - -#ifdef CONFIG_PARISC_TMPALIAS - -void clear_user_highpage(struct page *page, unsigned long vaddr) -{ - void *vto; - unsigned long flags; - - /* Clear using TMPALIAS region. The page doesn't need to - be flushed but the kernel mapping needs to be purged. */ - - vto = kmap_atomic(page); - - /* The PA-RISC 2.0 Architecture book states on page F-6: - "Before a write-capable translation is enabled, *all* - non-equivalently-aliased translations must be removed - from the page table and purged from the TLB. (Note - that the caches are not required to be flushed at this - time.) Before any non-equivalent aliased translation - is re-enabled, the virtual address range for the writeable - page (the entire page) must be flushed from the cache, - and the write-capable translation removed from the page - table and purged from the TLB." */ - - purge_kernel_dcache_page_asm((unsigned long)vto); - purge_tlb_start(flags); - pdtlb_kernel(vto); - purge_tlb_end(flags); - preempt_disable(); - clear_user_page_asm(vto, vaddr); - preempt_enable(); - - pagefault_enable(); /* kunmap_atomic(addr, KM_USER0); */ -} - -void copy_user_highpage(struct page *to, struct page *from, - unsigned long vaddr, struct vm_area_struct *vma) -{ - void *vfrom, *vto; - unsigned long flags; - - /* Copy using TMPALIAS region. This has the advantage - that the `from' page doesn't need to be flushed. However, - the `to' page must be flushed in copy_user_page_asm since - it can be used to bring in executable code. */ - - vfrom = kmap_atomic(from); - vto = kmap_atomic(to); - - purge_kernel_dcache_page_asm((unsigned long)vto); - purge_tlb_start(flags); - pdtlb_kernel(vto); - pdtlb_kernel(vfrom); - purge_tlb_end(flags); - preempt_disable(); - copy_user_page_asm(vto, vfrom, vaddr); - flush_dcache_page_asm(__pa(vto), vaddr); - preempt_enable(); - - pagefault_enable(); /* kunmap_atomic(addr, KM_USER1); */ - pagefault_enable(); /* kunmap_atomic(addr, KM_USER0); */ -} - -#endif /* CONFIG_PARISC_TMPALIAS */ diff --git a/arch/parisc/kernel/drivers.c b/arch/parisc/kernel/drivers.c index 14285caec71a..dba508fe1683 100644 --- a/arch/parisc/kernel/drivers.c +++ b/arch/parisc/kernel/drivers.c @@ -282,18 +282,6 @@ find_pa_parent_type(const struct parisc_device *padev, int type) return NULL; } -#ifdef CONFIG_PCI -static inline int is_pci_dev(struct device *dev) -{ - return dev->bus == &pci_bus_type; -} -#else -static inline int is_pci_dev(struct device *dev) -{ - return 0; -} -#endif - /* * get_node_path fills in @path with the firmware path to the device. * Note that if @node is a parisc device, we don't fill in the 'mod' field. @@ -306,7 +294,7 @@ static void get_node_path(struct device *dev, struct hardware_path *path) int i = 5; memset(&path->bc, -1, 6); - if (is_pci_dev(dev)) { + if (dev_is_pci(dev)) { unsigned int devfn = to_pci_dev(dev)->devfn; path->mod = PCI_FUNC(devfn); path->bc[i--] = PCI_SLOT(devfn); @@ -314,7 +302,7 @@ static void get_node_path(struct device *dev, struct hardware_path *path) } while (dev != &root) { - if (is_pci_dev(dev)) { + if (dev_is_pci(dev)) { unsigned int devfn = to_pci_dev(dev)->devfn; path->bc[i--] = PCI_SLOT(devfn) | (PCI_FUNC(devfn)<< 5); } else if (dev->bus == &parisc_bus_type) { @@ -695,7 +683,7 @@ static int check_parent(struct device * dev, void * data) if (dev->bus == &parisc_bus_type) { if (match_parisc_device(dev, d->index, d->modpath)) d->dev = dev; - } else if (is_pci_dev(dev)) { + } else if (dev_is_pci(dev)) { if (match_pci_device(dev, d->index, d->modpath)) d->dev = dev; } else if (dev->bus == NULL) { @@ -753,7 +741,7 @@ struct device *hwpath_to_device(struct hardware_path *modpath) if (!parent) return NULL; } - if (is_pci_dev(parent)) /* pci devices already parse MOD */ + if (dev_is_pci(parent)) /* pci devices already parse MOD */ return parent; else return parse_tree_node(parent, 6, modpath); @@ -772,7 +760,7 @@ void device_to_hwpath(struct device *dev, struct hardware_path *path) padev = to_parisc_device(dev); get_node_path(dev->parent, path); path->mod = padev->hw_path; - } else if (is_pci_dev(dev)) { + } else if (dev_is_pci(dev)) { get_node_path(dev, path); } } diff --git a/arch/parisc/kernel/irq.c b/arch/parisc/kernel/irq.c index 8ceac4785609..cfe056fe7f5c 100644 --- a/arch/parisc/kernel/irq.c +++ b/arch/parisc/kernel/irq.c @@ -117,7 +117,7 @@ int cpu_check_affinity(struct irq_data *d, const struct cpumask *dest) return -EINVAL; /* whatever mask they set, we just allow one CPU */ - cpu_dest = first_cpu(*dest); + cpu_dest = cpumask_first_and(dest, cpu_online_mask); return cpu_dest; } diff --git a/arch/parisc/kernel/process.c b/arch/parisc/kernel/process.c index 55f92b614182..0bbbf0d3f608 100644 --- a/arch/parisc/kernel/process.c +++ b/arch/parisc/kernel/process.c @@ -13,7 +13,7 @@ * Copyright (C) 2000 Grant Grundler <grundler with parisc-linux.org> * Copyright (C) 2001 Alan Modra <amodra at parisc-linux.org> * Copyright (C) 2001-2002 Ryan Bradetich <rbrad at parisc-linux.org> - * Copyright (C) 2001-2007 Helge Deller <deller at parisc-linux.org> + * Copyright (C) 2001-2014 Helge Deller <deller@gmx.de> * Copyright (C) 2002 Randolph Chung <tausq with parisc-linux.org> * * @@ -49,6 +49,7 @@ #include <linux/kallsyms.h> #include <linux/uaccess.h> #include <linux/rcupdate.h> +#include <linux/random.h> #include <asm/io.h> #include <asm/asm-offsets.h> @@ -286,3 +287,21 @@ void *dereference_function_descriptor(void *ptr) return ptr; } #endif + +static inline unsigned long brk_rnd(void) +{ + /* 8MB for 32bit, 1GB for 64bit */ + if (is_32bit_task()) + return (get_random_int() & 0x7ffUL) << PAGE_SHIFT; + else + return (get_random_int() & 0x3ffffUL) << PAGE_SHIFT; +} + +unsigned long arch_randomize_brk(struct mm_struct *mm) +{ + unsigned long ret = PAGE_ALIGN(mm->brk + brk_rnd()); + + if (ret < mm->brk) + return mm->brk; + return ret; +} diff --git a/arch/parisc/kernel/sys_parisc.c b/arch/parisc/kernel/sys_parisc.c index 0d3a9d4927b5..b7cadc4a06cd 100644 --- a/arch/parisc/kernel/sys_parisc.c +++ b/arch/parisc/kernel/sys_parisc.c @@ -5,6 +5,7 @@ * Copyright (C) 1999-2003 Matthew Wilcox <willy at parisc-linux.org> * Copyright (C) 2000-2003 Paul Bame <bame at parisc-linux.org> * Copyright (C) 2001 Thomas Bogendoerfer <tsbogend at parisc-linux.org> + * Copyright (C) 1999-2014 Helge Deller <deller@gmx.de> * * * This program is free software; you can redistribute it and/or modify @@ -23,6 +24,7 @@ */ #include <asm/uaccess.h> +#include <asm/elf.h> #include <linux/file.h> #include <linux/fs.h> #include <linux/linkage.h> @@ -32,78 +34,230 @@ #include <linux/syscalls.h> #include <linux/utsname.h> #include <linux/personality.h> +#include <linux/random.h> -static unsigned long get_unshared_area(unsigned long addr, unsigned long len) +/* we construct an artificial offset for the mapping based on the physical + * address of the kernel mapping variable */ +#define GET_LAST_MMAP(filp) \ + (filp ? ((unsigned long) filp->f_mapping) >> 8 : 0UL) +#define SET_LAST_MMAP(filp, val) \ + { /* nothing */ } + +static int get_offset(unsigned int last_mmap) { - struct vm_unmapped_area_info info; + return (last_mmap & (SHMLBA-1)) >> PAGE_SHIFT; +} - info.flags = 0; - info.length = len; - info.low_limit = PAGE_ALIGN(addr); - info.high_limit = TASK_SIZE; - info.align_mask = 0; - info.align_offset = 0; - return vm_unmapped_area(&info); +static unsigned long shared_align_offset(unsigned int last_mmap, + unsigned long pgoff) +{ + return (get_offset(last_mmap) + pgoff) << PAGE_SHIFT; } -/* - * We need to know the offset to use. Old scheme was to look for - * existing mapping and use the same offset. New scheme is to use the - * address of the kernel data structure as the seed for the offset. - * We'll see how that works... - * - * The mapping is cacheline aligned, so there's no information in the bottom - * few bits of the address. We're looking for 10 bits (4MB / 4k), so let's - * drop the bottom 8 bits and use bits 8-17. - */ -static int get_offset(struct address_space *mapping) +static inline unsigned long COLOR_ALIGN(unsigned long addr, + unsigned int last_mmap, unsigned long pgoff) { - return (unsigned long) mapping >> 8; + unsigned long base = (addr+SHMLBA-1) & ~(SHMLBA-1); + unsigned long off = (SHMLBA-1) & + (shared_align_offset(last_mmap, pgoff) << PAGE_SHIFT); + + return base + off; } -static unsigned long shared_align_offset(struct file *filp, unsigned long pgoff) +/* + * Top of mmap area (just below the process stack). + */ + +static unsigned long mmap_upper_limit(void) { - struct address_space *mapping = filp ? filp->f_mapping : NULL; + unsigned long stack_base; - return (get_offset(mapping) + pgoff) << PAGE_SHIFT; + /* Limit stack size to 1GB - see setup_arg_pages() in fs/exec.c */ + stack_base = rlimit_max(RLIMIT_STACK); + if (stack_base > (1 << 30)) + stack_base = 1 << 30; + + return PAGE_ALIGN(STACK_TOP - stack_base); } -static unsigned long get_shared_area(struct file *filp, unsigned long addr, - unsigned long len, unsigned long pgoff) + +unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, + unsigned long len, unsigned long pgoff, unsigned long flags) { + struct mm_struct *mm = current->mm; + struct vm_area_struct *vma; + unsigned long task_size = TASK_SIZE; + int do_color_align, last_mmap; struct vm_unmapped_area_info info; + if (len > task_size) + return -ENOMEM; + + do_color_align = 0; + if (filp || (flags & MAP_SHARED)) + do_color_align = 1; + last_mmap = GET_LAST_MMAP(filp); + + if (flags & MAP_FIXED) { + if ((flags & MAP_SHARED) && last_mmap && + (addr - shared_align_offset(last_mmap, pgoff)) + & (SHMLBA - 1)) + return -EINVAL; + goto found_addr; + } + + if (addr) { + if (do_color_align && last_mmap) + addr = COLOR_ALIGN(addr, last_mmap, pgoff); + else + addr = PAGE_ALIGN(addr); + + vma = find_vma(mm, addr); + if (task_size - len >= addr && + (!vma || addr + len <= vma->vm_start)) + goto found_addr; + } + info.flags = 0; info.length = len; - info.low_limit = PAGE_ALIGN(addr); - info.high_limit = TASK_SIZE; - info.align_mask = PAGE_MASK & (SHMLBA - 1); - info.align_offset = shared_align_offset(filp, pgoff); - return vm_unmapped_area(&info); + info.low_limit = mm->mmap_legacy_base; + info.high_limit = mmap_upper_limit(); + info.align_mask = last_mmap ? (PAGE_MASK & (SHMLBA - 1)) : 0; + info.align_offset = shared_align_offset(last_mmap, pgoff); + addr = vm_unmapped_area(&info); + +found_addr: + if (do_color_align && !last_mmap && !(addr & ~PAGE_MASK)) + SET_LAST_MMAP(filp, addr - (pgoff << PAGE_SHIFT)); + + return addr; } -unsigned long arch_get_unmapped_area(struct file *filp, unsigned long addr, - unsigned long len, unsigned long pgoff, unsigned long flags) +unsigned long +arch_get_unmapped_area_topdown(struct file *filp, const unsigned long addr0, + const unsigned long len, const unsigned long pgoff, + const unsigned long flags) { + struct vm_area_struct *vma; + struct mm_struct *mm = current->mm; + unsigned long addr = addr0; + int do_color_align, last_mmap; + struct vm_unmapped_area_info info; + +#ifdef CONFIG_64BIT + /* This should only ever run for 32-bit processes. */ + BUG_ON(!test_thread_flag(TIF_32BIT)); +#endif + + /* requested length too big for entire address space */ if (len > TASK_SIZE) return -ENOMEM; + + do_color_align = 0; + if (filp || (flags & MAP_SHARED)) + do_color_align = 1; + last_mmap = GET_LAST_MMAP(filp); + if (flags & MAP_FIXED) { - if ((flags & MAP_SHARED) && - (addr - shared_align_offset(filp, pgoff)) & (SHMLBA - 1)) + if ((flags & MAP_SHARED) && last_mmap && + (addr - shared_align_offset(last_mmap, pgoff)) + & (SHMLBA - 1)) return -EINVAL; - return addr; + goto found_addr; } - if (!addr) - addr = TASK_UNMAPPED_BASE; - if (filp || (flags & MAP_SHARED)) - addr = get_shared_area(filp, addr, len, pgoff); - else - addr = get_unshared_area(addr, len); + /* requesting a specific address */ + if (addr) { + if (do_color_align && last_mmap) + addr = COLOR_ALIGN(addr, last_mmap, pgoff); + else + addr = PAGE_ALIGN(addr); + vma = find_vma(mm, addr); + if (TASK_SIZE - len >= addr && + (!vma || addr + len <= vma->vm_start)) + goto found_addr; + } + + info.flags = VM_UNMAPPED_AREA_TOPDOWN; + info.length = len; + info.low_limit = PAGE_SIZE; + info.high_limit = mm->mmap_base; + info.align_mask = last_mmap ? (PAGE_MASK & (SHMLBA - 1)) : 0; + info.align_offset = shared_align_offset(last_mmap, pgoff); + addr = vm_unmapped_area(&info); + if (!(addr & ~PAGE_MASK)) + goto found_addr; + VM_BUG_ON(addr != -ENOMEM); + + /* + * A failed mmap() very likely causes application failure, + * so fall back to the bottom-up function here. This scenario + * can happen with large stack limits and large mmap() + * allocations. + */ + return arch_get_unmapped_area(filp, addr0, len, pgoff, flags); + +found_addr: + if (do_color_align && !last_mmap && !(addr & ~PAGE_MASK)) + SET_LAST_MMAP(filp, addr - (pgoff << PAGE_SHIFT)); return addr; } +static int mmap_is_legacy(void) +{ + if (current->personality & ADDR_COMPAT_LAYOUT) + return 1; + + /* parisc stack always grows up - so a unlimited stack should + * not be an indicator to use the legacy memory layout. + * if (rlimit(RLIMIT_STACK) == RLIM_INFINITY) + * return 1; |