X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fsparc64%2Fkernel%2Fbinfmt_aout32.c;h=c0422213d9d78648602c7c5459b73ec6f5249458;hb=43bc926fffd92024b46cafaf7350d669ba9ca884;hp=ae92b7776fad00e37bfd682831cff432e2f12b1d;hpb=9bf4aaab3e101692164d49b7ca357651eb691cb6;p=linux-2.6.git diff --git a/arch/sparc64/kernel/binfmt_aout32.c b/arch/sparc64/kernel/binfmt_aout32.c index ae92b7776..c0422213d 100644 --- a/arch/sparc64/kernel/binfmt_aout32.c +++ b/arch/sparc64/kernel/binfmt_aout32.c @@ -32,13 +32,12 @@ #include #include #include +#include static int load_aout32_binary(struct linux_binprm *, struct pt_regs * regs); static int load_aout32_library(struct file*); static int aout32_core_dump(long signr, struct pt_regs * regs, struct file *file); -extern void dump_thread(struct pt_regs *, struct user *); - static struct linux_binfmt aout32_format = { NULL, THIS_MODULE, load_aout32_binary, load_aout32_library, aout32_core_dump, PAGE_SIZE @@ -50,7 +49,9 @@ static void set_brk(unsigned long start, unsigned long end) end = PAGE_ALIGN(end); if (end <= start) return; + down_write(¤t->mm->mmap_sem); do_brk(start, end - start); + up_write(¤t->mm->mmap_sem); } /* @@ -96,26 +97,26 @@ static int aout32_core_dump(long signr, struct pt_regs *regs, struct file *file) set_fs(KERNEL_DS); has_dumped = 1; current->flags |= PF_DUMPCORE; - strncpy(dump.u_comm, current->comm, sizeof(current->comm)); + strncpy(dump.u_comm, current->comm, sizeof(dump.u_comm)); dump.signal = signr; dump_thread(regs, &dump); /* If the size of the dump file exceeds the rlimit, then see what would happen if we wrote the stack, but not the data area. */ if ((dump.u_dsize+dump.u_ssize) > - current->rlim[RLIMIT_CORE].rlim_cur) + current->signal->rlim[RLIMIT_CORE].rlim_cur) dump.u_dsize = 0; /* Make sure we have enough room to write the stack and data areas. */ if ((dump.u_ssize) > - current->rlim[RLIMIT_CORE].rlim_cur) + current->signal->rlim[RLIMIT_CORE].rlim_cur) dump.u_ssize = 0; /* make sure we actually have a data and stack area to dump */ set_fs(USER_DS); - if (verify_area(VERIFY_READ, (void __user *) START_DATA(dump), dump.u_dsize)) + if (!access_ok(VERIFY_READ, (void __user *) START_DATA(dump), dump.u_dsize)) dump.u_dsize = 0; - if (verify_area(VERIFY_READ, (void __user *) START_STACK(dump), dump.u_ssize)) + if (!access_ok(VERIFY_READ, (void __user *) START_STACK(dump), dump.u_ssize)) dump.u_ssize = 0; set_fs(KERNEL_DS); @@ -219,7 +220,7 @@ static int load_aout32_binary(struct linux_binprm * bprm, struct pt_regs * regs) * size limits imposed on them by creating programs with large * arrays in the data or bss. */ - rlim = current->rlim[RLIMIT_DATA].rlim_cur; + rlim = current->signal->rlim[RLIMIT_DATA].rlim_cur; if (rlim >= RLIM_INFINITY) rlim = ~0; if (ex.a_data + ex.a_bss > rlim) @@ -239,19 +240,23 @@ static int load_aout32_binary(struct linux_binprm * bprm, struct pt_regs * regs) (current->mm->start_data = N_DATADDR(ex)); current->mm->brk = ex.a_bss + (current->mm->start_brk = N_BSSADDR(ex)); + current->mm->free_area_cache = current->mm->mmap_base; + current->mm->cached_hole_size = 0; - // current->mm->rss = 0; - vx_rsspages_sub(current->mm, current->mm->rss); current->mm->mmap = NULL; compute_creds(bprm); current->flags &= ~PF_FORKNOEXEC; if (N_MAGIC(ex) == NMAGIC) { loff_t pos = fd_offset; /* Fuck me plenty... */ + down_write(¤t->mm->mmap_sem); error = do_brk(N_TXTADDR(ex), ex.a_text); + up_write(¤t->mm->mmap_sem); bprm->file->f_op->read(bprm->file, (char __user *)N_TXTADDR(ex), ex.a_text, &pos); + down_write(¤t->mm->mmap_sem); error = do_brk(N_DATADDR(ex), ex.a_data); + up_write(¤t->mm->mmap_sem); bprm->file->f_op->read(bprm->file, (char __user *)N_DATADDR(ex), ex.a_data, &pos); goto beyond_if; @@ -259,8 +264,10 @@ static int load_aout32_binary(struct linux_binprm * bprm, struct pt_regs * regs) if (N_MAGIC(ex) == OMAGIC) { loff_t pos = fd_offset; + down_write(¤t->mm->mmap_sem); do_brk(N_TXTADDR(ex) & PAGE_MASK, ex.a_text+ex.a_data + PAGE_SIZE - 1); + up_write(¤t->mm->mmap_sem); bprm->file->f_op->read(bprm->file, (char __user *)N_TXTADDR(ex), ex.a_text+ex.a_data, &pos); } else { @@ -274,7 +281,9 @@ static int load_aout32_binary(struct linux_binprm * bprm, struct pt_regs * regs) if (!bprm->file->f_op->mmap) { loff_t pos = fd_offset; + down_write(¤t->mm->mmap_sem); do_brk(0, ex.a_text+ex.a_data); + up_write(¤t->mm->mmap_sem); bprm->file->f_op->read(bprm->file, (char __user *)N_TXTADDR(ex), ex.a_text+ex.a_data, &pos); @@ -313,7 +322,7 @@ beyond_if: orig_thr_flags = current_thread_info()->flags; current_thread_info()->flags |= _TIF_32BIT; - retval = setup_arg_pages(bprm, EXSTACK_DEFAULT); + retval = setup_arg_pages(bprm, STACK_TOP, EXSTACK_DEFAULT); if (retval < 0) { current_thread_info()->flags = orig_thr_flags; @@ -324,16 +333,8 @@ beyond_if: current->mm->start_stack = (unsigned long) create_aout32_tables((char __user *)bprm->p, bprm); - if (!(orig_thr_flags & _TIF_32BIT)) { - unsigned long pgd_cache; - - pgd_cache = ((unsigned long)current->mm->pgd[0])<<11UL; - __asm__ __volatile__("stxa\t%0, [%1] %2\n\t" - "membar #Sync" - : /* no outputs */ - : "r" (pgd_cache), - "r" (TSB_REG), "i" (ASI_DMMU)); - } + tsb_context_switch(current->mm); + start_thread32(regs, ex.a_entry, current->mm->start_stack); if (current->ptrace & PT_PTRACED) send_sig(SIGTRAP, current, 0); @@ -391,7 +392,9 @@ static int load_aout32_library(struct file *file) len = PAGE_ALIGN(ex.a_text + ex.a_data); bss = ex.a_text + ex.a_data + ex.a_bss; if (bss > len) { + down_write(¤t->mm->mmap_sem); error = do_brk(start_addr + len, bss - len); + up_write(¤t->mm->mmap_sem); retval = error; if (error != start_addr + len) goto out;