/*
|
/*
|
* linux/fs/binfmt_som.c
|
* linux/fs/binfmt_som.c
|
*
|
*
|
* These are the functions used to load SOM format executables as used
|
* These are the functions used to load SOM format executables as used
|
* by HP-UX.
|
* by HP-UX.
|
*
|
*
|
* Copyright 1999 Matthew Wilcox <willy@bofh.ai>
|
* Copyright 1999 Matthew Wilcox <willy@bofh.ai>
|
* based on binfmt_elf which is
|
* based on binfmt_elf which is
|
* Copyright 1993, 1994: Eric Youngdale (ericy@cais.com).
|
* Copyright 1993, 1994: Eric Youngdale (ericy@cais.com).
|
*/
|
*/
|
|
|
#include <linux/module.h>
|
#include <linux/module.h>
|
|
|
#include <linux/fs.h>
|
#include <linux/fs.h>
|
#include <linux/stat.h>
|
#include <linux/stat.h>
|
#include <linux/sched.h>
|
#include <linux/sched.h>
|
#include <linux/mm.h>
|
#include <linux/mm.h>
|
#include <linux/mman.h>
|
#include <linux/mman.h>
|
#include <linux/errno.h>
|
#include <linux/errno.h>
|
#include <linux/signal.h>
|
#include <linux/signal.h>
|
#include <linux/binfmts.h>
|
#include <linux/binfmts.h>
|
#include <linux/som.h>
|
#include <linux/som.h>
|
#include <linux/string.h>
|
#include <linux/string.h>
|
#include <linux/file.h>
|
#include <linux/file.h>
|
#include <linux/fcntl.h>
|
#include <linux/fcntl.h>
|
#include <linux/ptrace.h>
|
#include <linux/ptrace.h>
|
#include <linux/slab.h>
|
#include <linux/slab.h>
|
#include <linux/shm.h>
|
#include <linux/shm.h>
|
#include <linux/personality.h>
|
#include <linux/personality.h>
|
#include <linux/init.h>
|
#include <linux/init.h>
|
|
|
#include <asm/uaccess.h>
|
#include <asm/uaccess.h>
|
#include <asm/pgtable.h>
|
#include <asm/pgtable.h>
|
|
|
#include <linux/config.h>
|
#include <linux/config.h>
|
|
|
#include <linux/elf.h>
|
#include <linux/elf.h>
|
|
|
static int load_som_binary(struct linux_binprm * bprm, struct pt_regs * regs);
|
static int load_som_binary(struct linux_binprm * bprm, struct pt_regs * regs);
|
static int load_som_library(struct file *);
|
static int load_som_library(struct file *);
|
|
|
/*
|
/*
|
* If we don't support core dumping, then supply a NULL so we
|
* If we don't support core dumping, then supply a NULL so we
|
* don't even try.
|
* don't even try.
|
*/
|
*/
|
#if 0
|
#if 0
|
static int som_core_dump(long signr, struct pt_regs * regs);
|
static int som_core_dump(long signr, struct pt_regs * regs);
|
#else
|
#else
|
#define som_core_dump NULL
|
#define som_core_dump NULL
|
#endif
|
#endif
|
|
|
#define SOM_PAGESTART(_v) ((_v) & ~(unsigned long)(SOM_PAGESIZE-1))
|
#define SOM_PAGESTART(_v) ((_v) & ~(unsigned long)(SOM_PAGESIZE-1))
|
#define SOM_PAGEOFFSET(_v) ((_v) & (SOM_PAGESIZE-1))
|
#define SOM_PAGEOFFSET(_v) ((_v) & (SOM_PAGESIZE-1))
|
#define SOM_PAGEALIGN(_v) (((_v) + SOM_PAGESIZE - 1) & ~(SOM_PAGESIZE - 1))
|
#define SOM_PAGEALIGN(_v) (((_v) + SOM_PAGESIZE - 1) & ~(SOM_PAGESIZE - 1))
|
|
|
static struct linux_binfmt som_format = {
|
static struct linux_binfmt som_format = {
|
NULL, THIS_MODULE, load_som_binary, load_som_library, som_core_dump, SOM_PAGESIZE
|
NULL, THIS_MODULE, load_som_binary, load_som_library, som_core_dump, SOM_PAGESIZE
|
};
|
};
|
|
|
/*
|
/*
|
* create_som_tables() parses the env- and arg-strings in new user
|
* create_som_tables() parses the env- and arg-strings in new user
|
* memory and creates the pointer tables from them, and puts their
|
* memory and creates the pointer tables from them, and puts their
|
* addresses on the "stack", returning the new stack pointer value.
|
* addresses on the "stack", returning the new stack pointer value.
|
*/
|
*/
|
static void create_som_tables(struct linux_binprm *bprm)
|
static void create_som_tables(struct linux_binprm *bprm)
|
{
|
{
|
char **argv, **envp;
|
char **argv, **envp;
|
int argc = bprm->argc;
|
int argc = bprm->argc;
|
int envc = bprm->envc;
|
int envc = bprm->envc;
|
unsigned long p;
|
unsigned long p;
|
unsigned long *sp;
|
unsigned long *sp;
|
|
|
/* Word-align the stack pointer */
|
/* Word-align the stack pointer */
|
sp = (unsigned long *)((bprm->p + 3) & ~3);
|
sp = (unsigned long *)((bprm->p + 3) & ~3);
|
|
|
envp = (char **) sp;
|
envp = (char **) sp;
|
sp += envc + 1;
|
sp += envc + 1;
|
argv = (char **) sp;
|
argv = (char **) sp;
|
sp += argc + 1;
|
sp += argc + 1;
|
|
|
__put_user((unsigned long) envp,++sp);
|
__put_user((unsigned long) envp,++sp);
|
__put_user((unsigned long) argv,++sp);
|
__put_user((unsigned long) argv,++sp);
|
|
|
__put_user(argc, ++sp);
|
__put_user(argc, ++sp);
|
|
|
bprm->p = (unsigned long) sp;
|
bprm->p = (unsigned long) sp;
|
|
|
p = current->mm->arg_start;
|
p = current->mm->arg_start;
|
while (argc-- > 0) {
|
while (argc-- > 0) {
|
__put_user((char *)p,argv++);
|
__put_user((char *)p,argv++);
|
p += strlen_user((char *)p);
|
p += strlen_user((char *)p);
|
}
|
}
|
__put_user(NULL, argv);
|
__put_user(NULL, argv);
|
current->mm->arg_end = current->mm->env_start = p;
|
current->mm->arg_end = current->mm->env_start = p;
|
while (envc-- > 0) {
|
while (envc-- > 0) {
|
__put_user((char *)p,envp++);
|
__put_user((char *)p,envp++);
|
p += strlen_user((char *)p);
|
p += strlen_user((char *)p);
|
}
|
}
|
__put_user(NULL, envp);
|
__put_user(NULL, envp);
|
current->mm->env_end = p;
|
current->mm->env_end = p;
|
}
|
}
|
|
|
static int check_som_header(struct som_hdr *som_ex)
|
static int check_som_header(struct som_hdr *som_ex)
|
{
|
{
|
int *buf = (int *)som_ex;
|
int *buf = (int *)som_ex;
|
int i, ck;
|
int i, ck;
|
|
|
if (som_ex->system_id != SOM_SID_PARISC_1_0 &&
|
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_1_1 &&
|
som_ex->system_id != SOM_SID_PARISC_2_0)
|
som_ex->system_id != SOM_SID_PARISC_2_0)
|
return -ENOEXEC;
|
return -ENOEXEC;
|
|
|
if (som_ex->a_magic != SOM_EXEC_NONSHARE &&
|
if (som_ex->a_magic != SOM_EXEC_NONSHARE &&
|
som_ex->a_magic != SOM_EXEC_SHARE &&
|
som_ex->a_magic != SOM_EXEC_SHARE &&
|
som_ex->a_magic != SOM_EXEC_DEMAND)
|
som_ex->a_magic != SOM_EXEC_DEMAND)
|
return -ENOEXEC;
|
return -ENOEXEC;
|
|
|
if (som_ex->version_id != SOM_ID_OLD &&
|
if (som_ex->version_id != SOM_ID_OLD &&
|
som_ex->version_id != SOM_ID_NEW)
|
som_ex->version_id != SOM_ID_NEW)
|
return -ENOEXEC;
|
return -ENOEXEC;
|
|
|
ck = 0;
|
ck = 0;
|
for (i=0; i<32; i++)
|
for (i=0; i<32; i++)
|
ck ^= buf[i];
|
ck ^= buf[i];
|
if (ck != 0)
|
if (ck != 0)
|
return -ENOEXEC;
|
return -ENOEXEC;
|
|
|
return 0;
|
return 0;
|
}
|
}
|
|
|
static int map_som_binary(struct file *file,
|
static int map_som_binary(struct file *file,
|
const struct som_exec_auxhdr *hpuxhdr)
|
const struct som_exec_auxhdr *hpuxhdr)
|
{
|
{
|
unsigned long code_start, code_size, data_start, data_size;
|
unsigned long code_start, code_size, data_start, data_size;
|
unsigned long bss_start, som_brk;
|
unsigned long bss_start, som_brk;
|
int retval;
|
int retval;
|
int prot = PROT_READ | PROT_EXEC;
|
int prot = PROT_READ | PROT_EXEC;
|
int flags = MAP_FIXED|MAP_PRIVATE|MAP_DENYWRITE|MAP_EXECUTABLE;
|
int flags = MAP_FIXED|MAP_PRIVATE|MAP_DENYWRITE|MAP_EXECUTABLE;
|
|
|
mm_segment_t old_fs = get_fs();
|
mm_segment_t old_fs = get_fs();
|
set_fs(get_ds());
|
set_fs(get_ds());
|
|
|
code_start = SOM_PAGESTART(hpuxhdr->exec_tmem);
|
code_start = SOM_PAGESTART(hpuxhdr->exec_tmem);
|
code_size = SOM_PAGEALIGN(hpuxhdr->exec_tsize);
|
code_size = SOM_PAGEALIGN(hpuxhdr->exec_tsize);
|
current->mm->start_code = code_start;
|
current->mm->start_code = code_start;
|
current->mm->end_code = code_start + code_size;
|
current->mm->end_code = code_start + code_size;
|
down_write(¤t->mm->mmap_sem);
|
down_write(¤t->mm->mmap_sem);
|
retval = do_mmap(file, code_start, code_size, prot,
|
retval = do_mmap(file, code_start, code_size, prot,
|
flags, SOM_PAGESTART(hpuxhdr->exec_tfile));
|
flags, SOM_PAGESTART(hpuxhdr->exec_tfile));
|
up_write(¤t->mm->mmap_sem);
|
up_write(¤t->mm->mmap_sem);
|
if (retval < 0 && retval > -1024)
|
if (retval < 0 && retval > -1024)
|
goto out;
|
goto out;
|
|
|
data_start = SOM_PAGESTART(hpuxhdr->exec_dmem);
|
data_start = SOM_PAGESTART(hpuxhdr->exec_dmem);
|
data_size = SOM_PAGEALIGN(hpuxhdr->exec_dsize);
|
data_size = SOM_PAGEALIGN(hpuxhdr->exec_dsize);
|
current->mm->start_data = data_start;
|
current->mm->start_data = data_start;
|
current->mm->end_data = bss_start = data_start + data_size;
|
current->mm->end_data = bss_start = data_start + data_size;
|
down_write(¤t->mm->mmap_sem);
|
down_write(¤t->mm->mmap_sem);
|
retval = do_mmap(file, data_start, data_size,
|
retval = do_mmap(file, data_start, data_size,
|
prot | PROT_WRITE, flags,
|
prot | PROT_WRITE, flags,
|
SOM_PAGESTART(hpuxhdr->exec_dfile));
|
SOM_PAGESTART(hpuxhdr->exec_dfile));
|
up_write(¤t->mm->mmap_sem);
|
up_write(¤t->mm->mmap_sem);
|
if (retval < 0 && retval > -1024)
|
if (retval < 0 && retval > -1024)
|
goto out;
|
goto out;
|
|
|
som_brk = bss_start + SOM_PAGEALIGN(hpuxhdr->exec_bsize);
|
som_brk = bss_start + SOM_PAGEALIGN(hpuxhdr->exec_bsize);
|
current->mm->start_brk = current->mm->brk = som_brk;
|
current->mm->start_brk = current->mm->brk = som_brk;
|
down_write(¤t->mm->mmap_sem);
|
down_write(¤t->mm->mmap_sem);
|
retval = do_mmap(NULL, bss_start, som_brk - bss_start,
|
retval = do_mmap(NULL, bss_start, som_brk - bss_start,
|
prot | PROT_WRITE, MAP_FIXED | MAP_PRIVATE, 0);
|
prot | PROT_WRITE, MAP_FIXED | MAP_PRIVATE, 0);
|
up_write(¤t->mm->mmap_sem);
|
up_write(¤t->mm->mmap_sem);
|
if (retval > 0 || retval < -1024)
|
if (retval > 0 || retval < -1024)
|
retval = 0;
|
retval = 0;
|
out:
|
out:
|
set_fs(old_fs);
|
set_fs(old_fs);
|
return retval;
|
return retval;
|
}
|
}
|
|
|
|
|
/*
|
/*
|
* These are the functions used to load SOM executables and shared
|
* These are the functions used to load SOM executables and shared
|
* libraries. There is no binary dependent code anywhere else.
|
* libraries. There is no binary dependent code anywhere else.
|
*/
|
*/
|
|
|
static inline int
|
static inline int
|
do_load_som_binary(struct linux_binprm * bprm, struct pt_regs * regs)
|
do_load_som_binary(struct linux_binprm * bprm, struct pt_regs * regs)
|
{
|
{
|
int som_exec_fileno;
|
int som_exec_fileno;
|
int retval;
|
int retval;
|
unsigned int size;
|
unsigned int size;
|
unsigned long som_entry;
|
unsigned long som_entry;
|
struct som_hdr *som_ex;
|
struct som_hdr *som_ex;
|
struct som_exec_auxhdr *hpuxhdr;
|
struct som_exec_auxhdr *hpuxhdr;
|
|
|
/* Get the exec-header */
|
/* Get the exec-header */
|
som_ex = (struct som_hdr *) bprm->buf;
|
som_ex = (struct som_hdr *) bprm->buf;
|
|
|
retval = check_som_header(som_ex);
|
retval = check_som_header(som_ex);
|
if (retval != 0)
|
if (retval != 0)
|
goto out;
|
goto out;
|
|
|
/* Now read in the auxiliary header information */
|
/* Now read in the auxiliary header information */
|
|
|
retval = -ENOMEM;
|
retval = -ENOMEM;
|
size = som_ex->aux_header_size;
|
size = som_ex->aux_header_size;
|
if (size > SOM_PAGESIZE)
|
if (size > SOM_PAGESIZE)
|
goto out;
|
goto out;
|
hpuxhdr = (struct som_exec_auxhdr *) kmalloc(size, GFP_KERNEL);
|
hpuxhdr = (struct som_exec_auxhdr *) kmalloc(size, GFP_KERNEL);
|
if (!hpuxhdr)
|
if (!hpuxhdr)
|
goto out;
|
goto out;
|
|
|
retval = kernel_read(bprm->file, som_ex->aux_header_location,
|
retval = kernel_read(bprm->file, som_ex->aux_header_location,
|
(char *) hpuxhdr, size);
|
(char *) hpuxhdr, size);
|
if (retval < 0)
|
if (retval < 0)
|
goto out_free;
|
goto out_free;
|
#error "Fix security hole before enabling me"
|
#error "Fix security hole before enabling me"
|
retval = get_unused_fd();
|
retval = get_unused_fd();
|
if (retval < 0)
|
if (retval < 0)
|
goto out_free;
|
goto out_free;
|
get_file(bprm->file);
|
get_file(bprm->file);
|
fd_install(som_exec_fileno = retval, bprm->file);
|
fd_install(som_exec_fileno = retval, bprm->file);
|
|
|
/* Flush all traces of the currently running executable */
|
/* Flush all traces of the currently running executable */
|
retval = flush_old_exec(bprm);
|
retval = flush_old_exec(bprm);
|
if (retval)
|
if (retval)
|
goto out_free;
|
goto out_free;
|
|
|
/* OK, This is the point of no return */
|
/* OK, This is the point of no return */
|
current->flags &= ~PF_FORKNOEXEC;
|
current->flags &= ~PF_FORKNOEXEC;
|
current->personality = PER_HPUX;
|
current->personality = PER_HPUX;
|
|
|
/* Set the task size for HP-UX processes such that
|
/* Set the task size for HP-UX processes such that
|
* the gateway page is outside the address space.
|
* the gateway page is outside the address space.
|
* This can be fixed later, but for now, this is much
|
* This can be fixed later, but for now, this is much
|
* easier.
|
* easier.
|
*/
|
*/
|
|
|
current->thread.task_size = 0xc0000000;
|
current->thread.task_size = 0xc0000000;
|
|
|
/* Set map base to allow enough room for hp-ux heap growth */
|
/* Set map base to allow enough room for hp-ux heap growth */
|
|
|
current->thread.map_base = 0x80000000;
|
current->thread.map_base = 0x80000000;
|
|
|
retval = map_som_binary(bprm->file, hpuxhdr);
|
retval = map_som_binary(bprm->file, hpuxhdr);
|
if (retval < 0)
|
if (retval < 0)
|
goto out_free;
|
goto out_free;
|
|
|
som_entry = hpuxhdr->exec_entry;
|
som_entry = hpuxhdr->exec_entry;
|
kfree(hpuxhdr);
|
kfree(hpuxhdr);
|
|
|
set_binfmt(&som_format);
|
set_binfmt(&som_format);
|
compute_creds(bprm);
|
compute_creds(bprm);
|
setup_arg_pages(bprm);
|
setup_arg_pages(bprm);
|
|
|
create_som_tables(bprm);
|
create_som_tables(bprm);
|
|
|
current->mm->start_stack = bprm->p;
|
current->mm->start_stack = bprm->p;
|
current->mm->rss = 0;
|
current->mm->rss = 0;
|
|
|
#if 0
|
#if 0
|
printk("(start_brk) %08lx\n" , (unsigned long) current->mm->start_brk);
|
printk("(start_brk) %08lx\n" , (unsigned long) current->mm->start_brk);
|
printk("(end_code) %08lx\n" , (unsigned long) current->mm->end_code);
|
printk("(end_code) %08lx\n" , (unsigned long) current->mm->end_code);
|
printk("(start_code) %08lx\n" , (unsigned long) current->mm->start_code);
|
printk("(start_code) %08lx\n" , (unsigned long) current->mm->start_code);
|
printk("(end_data) %08lx\n" , (unsigned long) current->mm->end_data);
|
printk("(end_data) %08lx\n" , (unsigned long) current->mm->end_data);
|
printk("(start_stack) %08lx\n" , (unsigned long) current->mm->start_stack);
|
printk("(start_stack) %08lx\n" , (unsigned long) current->mm->start_stack);
|
printk("(brk) %08lx\n" , (unsigned long) current->mm->brk);
|
printk("(brk) %08lx\n" , (unsigned long) current->mm->brk);
|
#endif
|
#endif
|
|
|
map_hpux_gateway_page(current,current->mm);
|
map_hpux_gateway_page(current,current->mm);
|
|
|
start_thread_som(regs, som_entry, bprm->p);
|
start_thread_som(regs, som_entry, bprm->p);
|
if (current->ptrace & PT_PTRACED)
|
if (current->ptrace & PT_PTRACED)
|
send_sig(SIGTRAP, current, 0);
|
send_sig(SIGTRAP, current, 0);
|
return 0;
|
return 0;
|
|
|
/* error cleanup */
|
/* error cleanup */
|
out_free:
|
out_free:
|
kfree(hpuxhdr);
|
kfree(hpuxhdr);
|
out:
|
out:
|
return retval;
|
return retval;
|
}
|
}
|
|
|
static int
|
static int
|
load_som_binary(struct linux_binprm * bprm, struct pt_regs * regs)
|
load_som_binary(struct linux_binprm * bprm, struct pt_regs * regs)
|
{
|
{
|
int retval;
|
int retval;
|
|
|
MOD_INC_USE_COUNT;
|
MOD_INC_USE_COUNT;
|
retval = do_load_som_binary(bprm, regs);
|
retval = do_load_som_binary(bprm, regs);
|
MOD_DEC_USE_COUNT;
|
MOD_DEC_USE_COUNT;
|
return retval;
|
return retval;
|
}
|
}
|
|
|
static inline int
|
static inline int
|
do_load_som_library(struct file *f)
|
do_load_som_library(struct file *f)
|
{
|
{
|
/* No lib support in SOM yet. gizza chance.. */
|
/* No lib support in SOM yet. gizza chance.. */
|
return -ENOEXEC;
|
return -ENOEXEC;
|
}
|
}
|
|
|
static int load_som_library(struct file *f)
|
static int load_som_library(struct file *f)
|
{
|
{
|
int retval;
|
int retval;
|
|
|
MOD_INC_USE_COUNT;
|
MOD_INC_USE_COUNT;
|
retval = do_load_som_library(f);
|
retval = do_load_som_library(f);
|
MOD_DEC_USE_COUNT;
|
MOD_DEC_USE_COUNT;
|
return retval;
|
return retval;
|
}
|
}
|
|
|
/* Install the SOM loader.
|
/* Install the SOM loader.
|
* N.B. We *rely* on the table being the right size with the
|
* N.B. We *rely* on the table being the right size with the
|
* right number of free slots...
|
* right number of free slots...
|
*/
|
*/
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|
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static int __init init_som_binfmt(void)
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static int __init init_som_binfmt(void)
|
{
|
{
|
return register_binfmt(&som_format);
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return register_binfmt(&som_format);
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}
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}
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|
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static void __exit exit_som_binfmt(void)
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static void __exit exit_som_binfmt(void)
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{
|
{
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/* Remove the SOM loader. */
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/* Remove the SOM loader. */
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unregister_binfmt(&som_format);
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unregister_binfmt(&som_format);
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}
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}
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|
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module_init(init_som_binfmt);
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module_init(init_som_binfmt);
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module_exit(exit_som_binfmt);
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module_exit(exit_som_binfmt);
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|
|
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