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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
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+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---
+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");
+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 */