--- /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/config.h>
+
+#include <linux/elf.h>
+
+static int load_som_binary(struct linux_binprm * bprm, struct pt_regs * regs);
+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(long signr, struct pt_regs * regs);
+#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 = {
+ 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
+ * 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;
+ down_write(¤t->mm->mmap_sem);
+ retval = do_mmap(file, code_start, code_size, prot,
+ flags, SOM_PAGESTART(hpuxhdr->exec_tfile));
+ up_write(¤t->mm->mmap_sem);
+ 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;
+ down_write(¤t->mm->mmap_sem);
+ retval = do_mmap(file, data_start, data_size,
+ prot | PROT_WRITE, flags,
+ SOM_PAGESTART(hpuxhdr->exec_dfile));
+ up_write(¤t->mm->mmap_sem);
+ 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;
+ down_write(¤t->mm->mmap_sem);
+ retval = do_mmap(NULL, bss_start, som_brk - bss_start,
+ prot | PROT_WRITE, MAP_FIXED | MAP_PRIVATE, 0);
+ up_write(¤t->mm->mmap_sem);
+ 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 inline int
+do_load_som_binary(struct linux_binprm * bprm, struct pt_regs * regs)
+{
+ int som_exec_fileno;
+ int retval;
+ unsigned int size;
+ unsigned long som_entry;
+ struct som_hdr *som_ex;
+ struct som_exec_auxhdr *hpuxhdr;
+
+ /* 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 = (struct som_exec_auxhdr *) kmalloc(size, GFP_KERNEL);
+ if (!hpuxhdr)
+ goto out;
+
+ retval = kernel_read(bprm->file, som_ex->aux_header_location,
+ (char *) hpuxhdr, size);
+ if (retval < 0)
+ goto out_free;
+
+ retval = get_unused_fd();
+ if (retval < 0)
+ goto out_free;
+ get_file(bprm->file);
+ fd_install(som_exec_fileno = retval, bprm->file);
+
+ /* 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->flags &= ~PF_FORKNOEXEC;
+ current->personality = PER_HPUX;
+
+ /* 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);
+ compute_creds(bprm);
+ setup_arg_pages(bprm);
+
+ create_som_tables(bprm);
+
+ current->mm->start_stack = bprm->p;
+ current->mm->rss = 0;
+
+#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);
+ if (current->ptrace & PT_PTRACED)
+ send_sig(SIGTRAP, current, 0);
+ return 0;
+
+ /* error cleanup */
+out_free:
+ kfree(hpuxhdr);
+out:
+ return retval;
+}
+
+static int
+load_som_binary(struct linux_binprm * bprm, struct pt_regs * regs)
+{
+ int retval;
+
+ MOD_INC_USE_COUNT;
+ retval = do_load_som_binary(bprm, regs);
+ MOD_DEC_USE_COUNT;
+ return retval;
+}
+
+static inline int
+do_load_som_library(struct file *f)
+{
+/* No lib support in SOM yet. gizza chance.. */
+ return -ENOEXEC;
+}
+
+static int load_som_library(struct file *f)
+{
+ int retval;
+
+ MOD_INC_USE_COUNT;
+ retval = do_load_som_library(f);
+ MOD_DEC_USE_COUNT;
+ return retval;
+}
+
+ /* 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)
+{
+ return register_binfmt(&som_format);
+}
+
+static void __exit exit_som_binfmt(void)
+{
+ /* Remove the SOM loader. */
+ unregister_binfmt(&som_format);
+}
+
+module_init(init_som_binfmt);
+module_exit(exit_som_binfmt);
+
--- /dev/null
+#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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