Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 309 insertions, 0 deletions

diff --git a/fs/binfmt_som.c b/fs/binfmt_som.c
new file mode 100644
index 000000000000..227a2682d2bf
--- /dev/null
+++ b/fs/binfmt_som.c
@@ -0,0 +1,309 @@
+/*
+ * linux/fs/binfmt_som.c
+ *
+ * These are the functions used to load SOM format executables as used
+ * by HP-UX.  
+ *
+ * Copyright 1999 Matthew Wilcox <willy@bofh.ai>
+ * based on binfmt_elf which is
+ * Copyright 1993, 1994: Eric Youngdale (ericy@cais.com).
+ */
+
+#include <linux/module.h>
+
+#include <linux/fs.h>
+#include <linux/stat.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/mman.h>
+#include <linux/errno.h>
+#include <linux/signal.h>
+#include <linux/binfmts.h>
+#include <linux/som.h>
+#include <linux/string.h>
+#include <linux/file.h>
+#include <linux/fcntl.h>
+#include <linux/ptrace.h>
+#include <linux/slab.h>
+#include <linux/shm.h>
+#include <linux/personality.h>
+#include <linux/init.h>
+
+#include <asm/uaccess.h>
+#include <asm/pgtable.h>
+
+#include <linux/config.h>
+
+#include <linux/elf.h>
+
+static int load_som_binary(struct linux_binprm * bprm, struct pt_regs * regs);
+static int load_som_library(struct file *);
+
+/*
+ * If we don't support core dumping, then supply a NULL so we
+ * don't even try.
+ */
+#if 0
+static int som_core_dump(long signr, struct pt_regs * regs);
+#else
+#define som_core_dump   NULL
+#endif
+
+#define SOM_PAGESTART(_v) ((_v) & ~(unsigned long)(SOM_PAGESIZE-1))
+#define SOM_PAGEOFFSET(_v) ((_v) & (SOM_PAGESIZE-1))
+#define SOM_PAGEALIGN(_v) (((_v) + SOM_PAGESIZE - 1) & ~(SOM_PAGESIZE - 1))
+
+static struct linux_binfmt som_format = {
+        .module         = THIS_MODULE,
+        .load_binary    = load_som_binary,
+        .load_shlib     = load_som_library,
+        .core_dump      = som_core_dump,
+        .min_coredump   = SOM_PAGESIZE
+};
+
+/*
+ * create_som_tables() parses the env- and arg-strings in new user
+ * memory and creates the pointer tables from them, and puts their
+ * addresses on the "stack", returning the new stack pointer value.
+ */
+static void create_som_tables(struct linux_binprm *bprm)
+{
+        char **argv, **envp;
+        int argc = bprm->argc;
+        int envc = bprm->envc;
+        unsigned long p;
+        unsigned long *sp;
+
+        /* Word-align the stack pointer */
+        sp = (unsigned long *)((bprm->p + 3) & ~3);
+
+        envp = (char **) sp;
+        sp += envc + 1;
+        argv = (char **) sp;
+        sp += argc + 1;
+
+        __put_user((unsigned long) envp,++sp);
+        __put_user((unsigned long) argv,++sp);
+
+        __put_user(argc, ++sp);
+
+        bprm->p = (unsigned long) sp;
+
+        p = current->mm->arg_start;
+        while (argc-- > 0) {
+                __put_user((char *)p,argv++);
+                p += strlen_user((char *)p);
+        }
+        __put_user(NULL, argv);
+        current->mm->arg_end = current->mm->env_start = p;
+        while (envc-- > 0) {
+                __put_user((char *)p,envp++);
+                p += strlen_user((char *)p);
+        }
+        __put_user(NULL, envp);
+        current->mm->env_end = p;
+}
+
+static int check_som_header(struct som_hdr *som_ex)
+{
+        int *buf = (int *)som_ex;
+        int i, ck;
+
+        if (som_ex->system_id != SOM_SID_PARISC_1_0 &&
+            som_ex->system_id != SOM_SID_PARISC_1_1 &&
+            som_ex->system_id != SOM_SID_PARISC_2_0)
+                return -ENOEXEC;
+
+        if (som_ex->a_magic != SOM_EXEC_NONSHARE &&
+            som_ex->a_magic != SOM_EXEC_SHARE &&
+            som_ex->a_magic != SOM_EXEC_DEMAND)
+                return -ENOEXEC;
+
+        if (som_ex->version_id != SOM_ID_OLD &&
+            som_ex->version_id != SOM_ID_NEW)
+                return -ENOEXEC;
+
+        ck = 0;
+        for (i=0; i<32; i++)
+                ck ^= buf[i];
+        if (ck != 0)
+                return -ENOEXEC;
+
+        return 0;
+}
+
+static int map_som_binary(struct file *file,
+                const struct som_exec_auxhdr *hpuxhdr)
+{
+        unsigned long code_start, code_size, data_start, data_size;
+        unsigned long bss_start, som_brk;
+        int retval;
+        int prot = PROT_READ | PROT_EXEC;
+        int flags = MAP_FIXED|MAP_PRIVATE|MAP_DENYWRITE|MAP_EXECUTABLE;
+
+        mm_segment_t old_fs = get_fs();
+        set_fs(get_ds());
+
+        code_start = SOM_PAGESTART(hpuxhdr->exec_tmem);
+        code_size = SOM_PAGEALIGN(hpuxhdr->exec_tsize);
+        current->mm->start_code = code_start;
+        current->mm->end_code = code_start + code_size;
+        down_write(&current->mm->mmap_sem);
+        retval = do_mmap(file, code_start, code_size, prot,
+                        flags, SOM_PAGESTART(hpuxhdr->exec_tfile));
+        up_write(&current->mm->mmap_sem);
+        if (retval < 0 && retval > -1024)
+                goto out;
+
+        data_start = SOM_PAGESTART(hpuxhdr->exec_dmem);
+        data_size = SOM_PAGEALIGN(hpuxhdr->exec_dsize);
+        current->mm->start_data = data_start;
+        current->mm->end_data = bss_start = data_start + data_size;
+        down_write(&current->mm->mmap_sem);
+        retval = do_mmap(file, data_start, data_size,
+                        prot | PROT_WRITE, flags,
+                        SOM_PAGESTART(hpuxhdr->exec_dfile));
+        up_write(&current->mm->mmap_sem);
+        if (retval < 0 && retval > -1024)
+                goto out;
+
+        som_brk = bss_start + SOM_PAGEALIGN(hpuxhdr->exec_bsize);
+        current->mm->start_brk = current->mm->brk = som_brk;
+        down_write(&current->mm->mmap_sem);
+        retval = do_mmap(NULL, bss_start, som_brk - bss_start,
+                        prot | PROT_WRITE, MAP_FIXED | MAP_PRIVATE, 0);
+        up_write(&current->mm->mmap_sem);
+        if (retval > 0 || retval < -1024)
+                retval = 0;
+out:
+        set_fs(old_fs);
+        return retval;
+}
+
+
+/*
+ * These are the functions used to load SOM executables and shared
+ * libraries.  There is no binary dependent code anywhere else.
+ */
+
+static int
+load_som_binary(struct linux_binprm * bprm, struct pt_regs * regs)
+{
+        int som_exec_fileno;
+        int retval;
+        unsigned int size;
+        unsigned long som_entry;
+        struct som_hdr *som_ex;
+        struct som_exec_auxhdr *hpuxhdr;
+
+        /* Get the exec-header */
+        som_ex = (struct som_hdr *) bprm->buf;
+
+        retval = check_som_header(som_ex);
+        if (retval != 0)
+                goto out;
+
+        /* Now read in the auxiliary header information */
+
+        retval = -ENOMEM;
+        size = som_ex->aux_header_size;
+        if (size > SOM_PAGESIZE)
+                goto out;
+        hpuxhdr = (struct som_exec_auxhdr *) kmalloc(size, GFP_KERNEL);
+        if (!hpuxhdr)
+                goto out;
+
+        retval = kernel_read(bprm->file, som_ex->aux_header_location,
+                        (char *) hpuxhdr, size);
+        if (retval < 0)
+                goto out_free;
+#error "Fix security hole before enabling me"
+        retval = get_unused_fd();
+        if (retval < 0)
+                goto out_free;
+        get_file(bprm->file);
+        fd_install(som_exec_fileno = retval, bprm->file);
+
+        /* Flush all traces of the currently running executable */
+        retval = flush_old_exec(bprm);
+        if (retval)
+                goto out_free;
+
+        /* OK, This is the point of no return */
+        current->flags &= ~PF_FORKNOEXEC;
+        current->personality = PER_HPUX;
+
+        /* Set the task size for HP-UX processes such that
+         * the gateway page is outside the address space.
+         * This can be fixed later, but for now, this is much
+         * easier.
+         */
+
+        current->thread.task_size = 0xc0000000;
+
+        /* Set map base to allow enough room for hp-ux heap growth */
+
+        current->thread.map_base = 0x80000000;
+
+        retval = map_som_binary(bprm->file, hpuxhdr);
+        if (retval < 0)
+                goto out_free;
+
+        som_entry = hpuxhdr->exec_entry;
+        kfree(hpuxhdr);
+
+        set_binfmt(&som_format);
+        compute_creds(bprm);
+        setup_arg_pages(bprm, STACK_TOP, EXSTACK_DEFAULT);
+
+        create_som_tables(bprm);
+
+        current->mm->start_stack = bprm->p;
+        set_mm_counter(current->mm, rss, 0);
+
+#if 0
+        printk("(start_brk) %08lx\n" , (unsigned long) current->mm->start_brk);
+        printk("(end_code) %08lx\n" , (unsigned long) current->mm->end_code);
+        printk("(start_code) %08lx\n" , (unsigned long) current->mm->start_code);
+        printk("(end_data) %08lx\n" , (unsigned long) current->mm->end_data);
+        printk("(start_stack) %08lx\n" , (unsigned long) current->mm->start_stack);
+        printk("(brk) %08lx\n" , (unsigned long) current->mm->brk);
+#endif
+
+        map_hpux_gateway_page(current,current->mm);
+
+        start_thread_som(regs, som_entry, bprm->p);
+        if (current->ptrace & PT_PTRACED)
+                send_sig(SIGTRAP, current, 0);
+        return 0;
+
+        /* error cleanup */
+out_free:
+        kfree(hpuxhdr);
+out:
+        return retval;
+}
+
+static int load_som_library(struct file *f)
+{
+/* No lib support in SOM yet.  gizza chance.. */
+        return -ENOEXEC;
+}
+        /* Install the SOM loader.
+         * N.B. We *rely* on the table being the right size with the
+         * right number of free slots...
+         */
+
+static int __init init_som_binfmt(void)
+{
+        return register_binfmt(&som_format);
+}
+
+static void __exit exit_som_binfmt(void)
+{
+        /* Remove the SOM loader. */
+        unregister_binfmt(&som_format);
+}
+
+core_initcall(init_som_binfmt);
+module_exit(exit_som_binfmt);