+++ /dev/null
-/*
- * 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/elf.h>
-
-static int load_som_binary(struct linux_binprm * bprm);
-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(struct coredump_params *cprm);
-#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;
- retval = vm_mmap(file, code_start, code_size, prot,
- flags, SOM_PAGESTART(hpuxhdr->exec_tfile));
- 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;
- retval = vm_mmap(file, data_start, data_size,
- prot | PROT_WRITE, flags,
- SOM_PAGESTART(hpuxhdr->exec_dfile));
- 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;
- retval = vm_mmap(NULL, bss_start, som_brk - bss_start,
- prot | PROT_WRITE, MAP_FIXED | MAP_PRIVATE, 0);
- 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)
-{
- int retval;
- unsigned int size;
- unsigned long som_entry;
- struct som_hdr *som_ex;
- struct som_exec_auxhdr *hpuxhdr;
- struct pt_regs *regs = current_pt_regs();
-
- /* 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 = kmalloc(size, GFP_KERNEL);
- if (!hpuxhdr)
- goto out;
-
- retval = kernel_read(bprm->file, som_ex->aux_header_location,
- (char *) hpuxhdr, size);
- if (retval != size) {
- if (retval >= 0)
- retval = -EIO;
- goto out_free;
- }
-
- /* 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->personality = PER_HPUX;
- setup_new_exec(bprm);
-
- /* 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);
- install_exec_creds(bprm);
- setup_arg_pages(bprm, STACK_TOP, EXSTACK_DEFAULT);
-
- create_som_tables(bprm);
-
- current->mm->start_stack = bprm->p;
-
-#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);
- 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)
-{
- register_binfmt(&som_format);
- return 0;
-}
-
-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);
-
-MODULE_LICENSE("GPL");
projects / linux-2.6-block.git / blobdiff