Commit 35e88d5c authored by Helge Deller's avatar Helge Deller
Browse files

fs/binfmt_som: Drop kernel support for HP-UX SOM binaries



The parisc arch has been the only user of HP-UX SOM binaries.

Support for HP-UX executables was never finished and since we now drop support
for the HP-UX compat layer anyway, it does not makes sense to keep the
BINFMT_SOM support.

Cc: linux-fsdevel@vger.kernel.org
Cc: linux-parisc@vger.kernel.org
Signed-off-by: default avatarHelge Deller <deller@gmx.de>
parent 3d66b810
......@@ -149,13 +149,6 @@ config BINFMT_EM86
later load the module when you want to use a Linux/Intel binary. The
module will be called binfmt_em86. If unsure, say Y.
config BINFMT_SOM
tristate "Kernel support for SOM binaries"
depends on PARISC && HPUX
help
SOM is a binary executable format inherited from HP/UX. Say
Y here to be able to load and execute SOM binaries directly.
config BINFMT_MISC
tristate "Kernel support for MISC binaries"
---help---
......
......@@ -37,7 +37,6 @@ obj-$(CONFIG_BINFMT_SCRIPT) += binfmt_script.o
obj-$(CONFIG_BINFMT_ELF) += binfmt_elf.o
obj-$(CONFIG_COMPAT_BINFMT_ELF) += compat_binfmt_elf.o
obj-$(CONFIG_BINFMT_ELF_FDPIC) += binfmt_elf_fdpic.o
obj-$(CONFIG_BINFMT_SOM) += binfmt_som.o
obj-$(CONFIG_BINFMT_FLAT) += binfmt_flat.o
obj-$(CONFIG_FS_MBCACHE) += mbcache.o
......
/*
* 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");
......@@ -370,7 +370,6 @@ header-y += snmp.h
header-y += sock_diag.h
header-y += socket.h
header-y += sockios.h
header-y += som.h
header-y += sonet.h
header-y += sonypi.h
header-y += soundcard.h
......
#ifndef _LINUX_SOM_H
#define _LINUX_SOM_H
/* File format definition for SOM executables / shared libraries */
/* we need struct timespec */
#include <linux/time.h>
#define SOM_PAGESIZE 4096
/* this is the SOM header */
struct som_hdr {
short system_id; /* magic number - system */
short a_magic; /* magic number - file type */
unsigned int version_id; /* versiod ID: YYMMDDHH */
struct timespec file_time; /* system clock */
unsigned int entry_space; /* space for entry point */
unsigned int entry_subspace; /* subspace for entry point */
unsigned int entry_offset; /* offset of entry point */
unsigned int aux_header_location; /* auxiliary header location */
unsigned int aux_header_size; /* auxiliary header size */
unsigned int som_length; /* length of entire SOM */
unsigned int presumed_dp; /* compiler's DP value */
unsigned int space_location; /* space dictionary location */
unsigned int space_total; /* number of space entries */
unsigned int subspace_location; /* subspace entries location */
unsigned int subspace_total; /* number of subspace entries */
unsigned int loader_fixup_location; /* MPE/iX loader fixup */
unsigned int loader_fixup_total; /* number of fixup records */
unsigned int space_strings_location; /* (sub)space names */
unsigned int space_strings_size; /* size of strings area */
unsigned int init_array_location; /* reserved */
unsigned int init_array_total; /* reserved */
unsigned int compiler_location; /* module dictionary */
unsigned int compiler_total; /* number of modules */
unsigned int symbol_location; /* symbol dictionary */
unsigned int symbol_total; /* number of symbols */
unsigned int fixup_request_location; /* fixup requests */
unsigned int fixup_request_total; /* number of fixup requests */
unsigned int symbol_strings_location;/* module & symbol names area */
unsigned int symbol_strings_size; /* size of strings area */
unsigned int unloadable_sp_location; /* unloadable spaces location */
unsigned int unloadable_sp_size; /* size of data */
unsigned int checksum;
};
/* values for system_id */
#define SOM_SID_PARISC_1_0 0x020b
#define SOM_SID_PARISC_1_1 0x0210
#define SOM_SID_PARISC_2_0 0x0214
/* values for a_magic */
#define SOM_LIB_EXEC 0x0104
#define SOM_RELOCATABLE 0x0106
#define SOM_EXEC_NONSHARE 0x0107
#define SOM_EXEC_SHARE 0x0108
#define SOM_EXEC_DEMAND 0x010B
#define SOM_LIB_DYN 0x010D
#define SOM_LIB_SHARE 0x010E
#define SOM_LIB_RELOC 0x0619
/* values for version_id. Decimal not hex, yes. Grr. */
#define SOM_ID_OLD 85082112
#define SOM_ID_NEW 87102412
struct aux_id {
unsigned int mandatory :1; /* the linker must understand this */
unsigned int copy :1; /* Must be copied by the linker */
unsigned int append :1; /* Must be merged by the linker */
unsigned int ignore :1; /* Discard section if unknown */
unsigned int reserved :12;
unsigned int type :16; /* Header type */
unsigned int length; /* length of _following_ data */
};
/* The Exec Auxiliary Header. Called The HP-UX Header within HP apparently. */
struct som_exec_auxhdr {
struct aux_id som_auxhdr;
int exec_tsize; /* Text size in bytes */
int exec_tmem; /* Address to load text at */
int exec_tfile; /* Location of text in file */
int exec_dsize; /* Data size in bytes */
int exec_dmem; /* Address to load data at */
int exec_dfile; /* Location of data in file */
int exec_bsize; /* Uninitialised data (bss) */
int exec_entry; /* Address to start executing */
int exec_flags; /* loader flags */
int exec_bfill; /* initialisation value for bss */
};
/* Oh, the things people do to avoid casts. Shame it'll break with gcc's
* new aliasing rules really.
*/
union name_pt {
char * n_name;
unsigned int n_strx;
};
/* The Space Dictionary */
struct space_dictionary_record {
union name_pt name; /* index to subspace name */
unsigned int is_loadable :1; /* loadable */
unsigned int is_defined :1; /* defined within file */
unsigned int is_private :1; /* not sharable */
unsigned int has_intermediate_code :1; /* contains intermediate code */
unsigned int is_tspecific :1; /* thread specific */
unsigned int reserved :11; /* for future expansion */
unsigned int sort_key :8; /* for linker */
unsigned int reserved2 :8; /* for future expansion */
int space_number; /* index */
int subspace_index; /* index into subspace dict */
unsigned int subspace_quantity; /* number of subspaces */
int loader_fix_index; /* for loader */
unsigned int loader_fix_quantity; /* for loader */
int init_pointer_index; /* data pointer array index */
unsigned int init_pointer_quantity; /* number of data pointers */
};
/* The Subspace Dictionary */
struct subspace_dictionary_record {
int space_index;
unsigned int access_control_bits :7;
unsigned int memory_resident :1;
unsigned int dup_common :1;
unsigned int is_common :1;
unsigned int quadrant :2;
unsigned int initially_frozen :1;
unsigned int is_first :1;
unsigned int code_only :1;
unsigned int sort_key :8;
unsigned int replicate_init :1;
unsigned int continuation :1;
unsigned int is_tspecific :1;
unsigned int is_comdat :1;
unsigned int reserved :4;
int file_loc_init_value;
unsigned int initialization_length;
unsigned int subspace_start;
unsigned int subspace_length;
unsigned int reserved2 :5;
unsigned int alignment :27;
union name_pt name;
int fixup_request_index;
unsigned int fixup_request_quantity;
};
#endif /* _LINUX_SOM_H */
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