diff options
Diffstat (limited to 'arch/powerpc/kernel')
| -rw-r--r-- | arch/powerpc/kernel/align.c | 36 | ||||
| -rw-r--r-- | arch/powerpc/kernel/ftrace.c | 5 | ||||
| -rw-r--r-- | arch/powerpc/kernel/pci-common.c | 17 |
3 files changed, 37 insertions, 21 deletions
diff --git a/arch/powerpc/kernel/align.c b/arch/powerpc/kernel/align.c index 5af4e9b2dbe..73cb6a3229a 100644 --- a/arch/powerpc/kernel/align.c +++ b/arch/powerpc/kernel/align.c @@ -367,27 +367,24 @@ static int emulate_multiple(struct pt_regs *regs, unsigned char __user *addr, static int emulate_fp_pair(unsigned char __user *addr, unsigned int reg, unsigned int flags) { - char *ptr = (char *) ¤t->thread.TS_FPR(reg); - int i, ret; + char *ptr0 = (char *) ¤t->thread.TS_FPR(reg); + char *ptr1 = (char *) ¤t->thread.TS_FPR(reg+1); + int i, ret, sw = 0; if (!(flags & F)) return 0; if (reg & 1) return 0; /* invalid form: FRS/FRT must be even */ - if (!(flags & SW)) { - /* not byte-swapped - easy */ - if (!(flags & ST)) - ret = __copy_from_user(ptr, addr, 16); - else - ret = __copy_to_user(addr, ptr, 16); - } else { - /* each FPR value is byte-swapped separately */ - ret = 0; - for (i = 0; i < 16; ++i) { - if (!(flags & ST)) - ret |= __get_user(ptr[i^7], addr + i); - else - ret |= __put_user(ptr[i^7], addr + i); + if (flags & SW) + sw = 7; + ret = 0; + for (i = 0; i < 8; ++i) { + if (!(flags & ST)) { + ret |= __get_user(ptr0[i^sw], addr + i); + ret |= __get_user(ptr1[i^sw], addr + i + 8); + } else { + ret |= __put_user(ptr0[i^sw], addr + i); + ret |= __put_user(ptr1[i^sw], addr + i + 8); } } if (ret) @@ -646,11 +643,16 @@ static int emulate_vsx(unsigned char __user *addr, unsigned int reg, unsigned int areg, struct pt_regs *regs, unsigned int flags, unsigned int length) { - char *ptr = (char *) ¤t->thread.TS_FPR(reg); + char *ptr; int ret = 0; flush_vsx_to_thread(current); + if (reg < 32) + ptr = (char *) ¤t->thread.TS_FPR(reg); + else + ptr = (char *) ¤t->thread.vr[reg - 32]; + if (flags & ST) ret = __copy_to_user(addr, ptr, length); else { diff --git a/arch/powerpc/kernel/ftrace.c b/arch/powerpc/kernel/ftrace.c index 5355244c99f..60c60ccf5e3 100644 --- a/arch/powerpc/kernel/ftrace.c +++ b/arch/powerpc/kernel/ftrace.c @@ -195,8 +195,9 @@ __ftrace_make_nop(struct module *mod, return -EINVAL; } - offset = (unsigned)((unsigned short)jmp[0]) << 16 | - (unsigned)((unsigned short)jmp[1]); + /* The bottom half is signed extended */ + offset = ((unsigned)((unsigned short)jmp[0]) << 16) + + (int)((short)jmp[1]); DEBUGP(" %x ", offset); diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c index 19b12d2cbb4..0f418127231 100644 --- a/arch/powerpc/kernel/pci-common.c +++ b/arch/powerpc/kernel/pci-common.c @@ -561,8 +561,21 @@ int pci_mmap_legacy_page_range(struct pci_bus *bus, (unsigned long long)(offset + size - 1)); if (mmap_state == pci_mmap_mem) { - if ((offset + size) > hose->isa_mem_size) - return -ENXIO; + /* Hack alert ! + * + * Because X is lame and can fail starting if it gets an error trying + * to mmap legacy_mem (instead of just moving on without legacy memory + * access) we fake it here by giving it anonymous memory, effectively + * behaving just like /dev/zero + */ + if ((offset + size) > hose->isa_mem_size) { + printk(KERN_DEBUG + "Process %s (pid:%d) mapped non-existing PCI legacy memory for 0%04x:%02x\n", + current->comm, current->pid, pci_domain_nr(bus), bus->number); + if (vma->vm_flags & VM_SHARED) + return shmem_zero_setup(vma); + return 0; + } offset += hose->isa_mem_phys; } else { unsigned long io_offset = (unsigned long)hose->io_base_virt - _IO_BASE; |