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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

fs/Kconfig.binfmt

+0 −7
Original line number Diff line number Diff line
@@ -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---

fs/Makefile

+0 −1
Original line number Diff line number Diff line
@@ -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

fs/binfmt_som.c

deleted100644 → 0
+0 −299
Original line number Diff line number Diff line 
/*

 * 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");

include/uapi/linux/Kbuild

+0 −1
Original line number Diff line number Diff line
@@ -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

include/uapi/linux/som.h

deleted100644 → 0
+0 −154
Original line number Diff line number Diff line 
#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 */