summaryrefslogtreecommitdiffstats
path: root/arch/mips/kernel/irixelf.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/mips/kernel/irixelf.c')
-rw-r--r--arch/mips/kernel/irixelf.c1361
1 files changed, 0 insertions, 1361 deletions
diff --git a/arch/mips/kernel/irixelf.c b/arch/mips/kernel/irixelf.c
deleted file mode 100644
index 469c723..0000000
--- a/arch/mips/kernel/irixelf.c
+++ /dev/null
@@ -1,1361 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * irixelf.c: Code to load IRIX ELF executables conforming to the MIPS ABI.
- * Based off of work by Eric Youngdale.
- *
- * Copyright (C) 1993 - 1994 Eric Youngdale <ericy@cais.com>
- * Copyright (C) 1996 - 2004 David S. Miller <dm@engr.sgi.com>
- * Copyright (C) 2004 - 2005 Steven J. Hill <sjhill@realitydiluted.com>
- */
-#undef DEBUG
-
-#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/a.out.h>
-#include <linux/errno.h>
-#include <linux/init.h>
-#include <linux/signal.h>
-#include <linux/binfmts.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/elfcore.h>
-
-#include <asm/mipsregs.h>
-#include <asm/namei.h>
-#include <asm/prctl.h>
-#include <asm/uaccess.h>
-
-#define DLINFO_ITEMS 12
-
-#include <linux/elf.h>
-
-static int load_irix_binary(struct linux_binprm * bprm, struct pt_regs * regs);
-static int load_irix_library(struct file *);
-static int irix_core_dump(long signr, struct pt_regs * regs,
- struct file *file, unsigned long limit);
-
-static struct linux_binfmt irix_format = {
- .module = THIS_MODULE,
- .load_binary = load_irix_binary,
- .load_shlib = load_irix_library,
- .core_dump = irix_core_dump,
- .min_coredump = PAGE_SIZE,
-};
-
-/* Debugging routines. */
-static char *get_elf_p_type(Elf32_Word p_type)
-{
-#ifdef DEBUG
- switch (p_type) {
- case PT_NULL:
- return "PT_NULL";
- break;
-
- case PT_LOAD:
- return "PT_LOAD";
- break;
-
- case PT_DYNAMIC:
- return "PT_DYNAMIC";
- break;
-
- case PT_INTERP:
- return "PT_INTERP";
- break;
-
- case PT_NOTE:
- return "PT_NOTE";
- break;
-
- case PT_SHLIB:
- return "PT_SHLIB";
- break;
-
- case PT_PHDR:
- return "PT_PHDR";
- break;
-
- case PT_LOPROC:
- return "PT_LOPROC/REGINFO";
- break;
-
- case PT_HIPROC:
- return "PT_HIPROC";
- break;
-
- default:
- return "PT_BOGUS";
- break;
- }
-#endif
-}
-
-static void print_elfhdr(struct elfhdr *ehp)
-{
- int i;
-
- pr_debug("ELFHDR: e_ident<");
- for (i = 0; i < (EI_NIDENT - 1); i++)
- pr_debug("%x ", ehp->e_ident[i]);
- pr_debug("%x>\n", ehp->e_ident[i]);
- pr_debug(" e_type[%04x] e_machine[%04x] e_version[%08lx]\n",
- (unsigned short) ehp->e_type, (unsigned short) ehp->e_machine,
- (unsigned long) ehp->e_version);
- pr_debug(" e_entry[%08lx] e_phoff[%08lx] e_shoff[%08lx] "
- "e_flags[%08lx]\n",
- (unsigned long) ehp->e_entry, (unsigned long) ehp->e_phoff,
- (unsigned long) ehp->e_shoff, (unsigned long) ehp->e_flags);
- pr_debug(" e_ehsize[%04x] e_phentsize[%04x] e_phnum[%04x]\n",
- (unsigned short) ehp->e_ehsize,
- (unsigned short) ehp->e_phentsize,
- (unsigned short) ehp->e_phnum);
- pr_debug(" e_shentsize[%04x] e_shnum[%04x] e_shstrndx[%04x]\n",
- (unsigned short) ehp->e_shentsize,
- (unsigned short) ehp->e_shnum,
- (unsigned short) ehp->e_shstrndx);
-}
-
-static void print_phdr(int i, struct elf_phdr *ep)
-{
- pr_debug("PHDR[%d]: p_type[%s] p_offset[%08lx] p_vaddr[%08lx] "
- "p_paddr[%08lx]\n", i, get_elf_p_type(ep->p_type),
- (unsigned long) ep->p_offset, (unsigned long) ep->p_vaddr,
- (unsigned long) ep->p_paddr);
- pr_debug(" p_filesz[%08lx] p_memsz[%08lx] p_flags[%08lx] "
- "p_align[%08lx]\n", (unsigned long) ep->p_filesz,
- (unsigned long) ep->p_memsz, (unsigned long) ep->p_flags,
- (unsigned long) ep->p_align);
-}
-
-static void dump_phdrs(struct elf_phdr *ep, int pnum)
-{
- int i;
-
- for (i = 0; i < pnum; i++, ep++) {
- if ((ep->p_type == PT_LOAD) ||
- (ep->p_type == PT_INTERP) ||
- (ep->p_type == PT_PHDR))
- print_phdr(i, ep);
- }
-}
-
-static void set_brk(unsigned long start, unsigned long end)
-{
- start = PAGE_ALIGN(start);
- end = PAGE_ALIGN(end);
- if (end <= start)
- return;
- down_write(&current->mm->mmap_sem);
- do_brk(start, end - start);
- up_write(&current->mm->mmap_sem);
-}
-
-
-/* We need to explicitly zero any fractional pages
- * after the data section (i.e. bss). This would
- * contain the junk from the file that should not
- * be in memory.
- */
-static void padzero(unsigned long elf_bss)
-{
- unsigned long nbyte;
-
- nbyte = elf_bss & (PAGE_SIZE-1);
- if (nbyte) {
- nbyte = PAGE_SIZE - nbyte;
- clear_user((void __user *) elf_bss, nbyte);
- }
-}
-
-static unsigned long * create_irix_tables(char * p, int argc, int envc,
- struct elfhdr * exec, unsigned int load_addr,
- unsigned int interp_load_addr, struct pt_regs *regs,
- struct elf_phdr *ephdr)
-{
- elf_addr_t *argv;
- elf_addr_t *envp;
- elf_addr_t *sp, *csp;
-
- pr_debug("create_irix_tables: p[%p] argc[%d] envc[%d] "
- "load_addr[%08x] interp_load_addr[%08x]\n",
- p, argc, envc, load_addr, interp_load_addr);
-
- sp = (elf_addr_t *) (~15UL & (unsigned long) p);
- csp = sp;
- csp -= exec ? DLINFO_ITEMS*2 : 2;
- csp -= envc+1;
- csp -= argc+1;
- csp -= 1; /* argc itself */
- if ((unsigned long)csp & 15UL) {
- sp -= (16UL - ((unsigned long)csp & 15UL)) / sizeof(*sp);
- }
-
- /*
- * Put the ELF interpreter info on the stack
- */
-#define NEW_AUX_ENT(nr, id, val) \
- __put_user((id), sp+(nr*2)); \
- __put_user((val), sp+(nr*2+1)); \
-
- sp -= 2;
- NEW_AUX_ENT(0, AT_NULL, 0);
-
- if (exec) {
- sp -= 11*2;
-
- NEW_AUX_ENT(0, AT_PHDR, load_addr + exec->e_phoff);
- NEW_AUX_ENT(1, AT_PHENT, sizeof(struct elf_phdr));
- NEW_AUX_ENT(2, AT_PHNUM, exec->e_phnum);
- NEW_AUX_ENT(3, AT_PAGESZ, ELF_EXEC_PAGESIZE);
- NEW_AUX_ENT(4, AT_BASE, interp_load_addr);
- NEW_AUX_ENT(5, AT_FLAGS, 0);
- NEW_AUX_ENT(6, AT_ENTRY, (elf_addr_t) exec->e_entry);
- NEW_AUX_ENT(7, AT_UID, (elf_addr_t) current->uid);
- NEW_AUX_ENT(8, AT_EUID, (elf_addr_t) current->euid);
- NEW_AUX_ENT(9, AT_GID, (elf_addr_t) current->gid);
- NEW_AUX_ENT(10, AT_EGID, (elf_addr_t) current->egid);
- }
-#undef NEW_AUX_ENT
-
- sp -= envc+1;
- envp = sp;
- sp -= argc+1;
- argv = sp;
-
- __put_user((elf_addr_t)argc, --sp);
- current->mm->arg_start = (unsigned long) p;
- while (argc-->0) {
- __put_user((unsigned long)p, argv++);
- p += strlen_user(p);
- }
- __put_user((unsigned long) NULL, argv);
- current->mm->arg_end = current->mm->env_start = (unsigned long) p;
- while (envc-->0) {
- __put_user((unsigned long)p, envp++);
- p += strlen_user(p);
- }
- __put_user((unsigned long) NULL, envp);
- current->mm->env_end = (unsigned long) p;
- return sp;
-}
-
-
-/* This is much more generalized than the library routine read function,
- * so we keep this separate. Technically the library read function
- * is only provided so that we can read a.out libraries that have
- * an ELF header.
- */
-static unsigned int load_irix_interp(struct elfhdr * interp_elf_ex,
- struct file * interpreter,
- unsigned int *interp_load_addr)
-{
- struct elf_phdr *elf_phdata = NULL;
- struct elf_phdr *eppnt;
- unsigned int len;
- unsigned int load_addr;
- int elf_bss;
- int retval;
- unsigned int last_bss;
- int error;
- int i;
- unsigned int k;
-
- elf_bss = 0;
- last_bss = 0;
- error = load_addr = 0;
-
- print_elfhdr(interp_elf_ex);
-
- /* First of all, some simple consistency checks */
- if ((interp_elf_ex->e_type != ET_EXEC &&
- interp_elf_ex->e_type != ET_DYN) ||
- !interpreter->f_op->mmap) {
- printk("IRIX interp has bad e_type %d\n", interp_elf_ex->e_type);
- return 0xffffffff;
- }
-
- /* Now read in all of the header information */
- if (sizeof(struct elf_phdr) * interp_elf_ex->e_phnum > PAGE_SIZE) {
- printk("IRIX interp header bigger than a page (%d)\n",
- (sizeof(struct elf_phdr) * interp_elf_ex->e_phnum));
- return 0xffffffff;
- }
-
- elf_phdata = kmalloc(sizeof(struct elf_phdr) * interp_elf_ex->e_phnum,
- GFP_KERNEL);
-
- if (!elf_phdata) {
- printk("Cannot kmalloc phdata for IRIX interp.\n");
- return 0xffffffff;
- }
-
- /* If the size of this structure has changed, then punt, since
- * we will be doing the wrong thing.
- */
- if (interp_elf_ex->e_phentsize != 32) {
- printk("IRIX interp e_phentsize == %d != 32 ",
- interp_elf_ex->e_phentsize);
- kfree(elf_phdata);
- return 0xffffffff;
- }
-
- retval = kernel_read(interpreter, interp_elf_ex->e_phoff,
- (char *) elf_phdata,
- sizeof(struct elf_phdr) * interp_elf_ex->e_phnum);
-
- dump_phdrs(elf_phdata, interp_elf_ex->e_phnum);
-
- eppnt = elf_phdata;
- for (i = 0; i < interp_elf_ex->e_phnum; i++, eppnt++) {
- if (eppnt->p_type == PT_LOAD) {
- int elf_type = MAP_PRIVATE | MAP_DENYWRITE;
- int elf_prot = 0;
- unsigned long vaddr = 0;
- if (eppnt->p_flags & PF_R)
- elf_prot = PROT_READ;
- if (eppnt->p_flags & PF_W)
- elf_prot |= PROT_WRITE;
- if (eppnt->p_flags & PF_X)
- elf_prot |= PROT_EXEC;
- elf_type |= MAP_FIXED;
- vaddr = eppnt->p_vaddr;
-
- pr_debug("INTERP do_mmap"
- "(%p, %08lx, %08lx, %08lx, %08lx, %08lx) ",
- interpreter, vaddr,
- (unsigned long)
- (eppnt->p_filesz + (eppnt->p_vaddr & 0xfff)),
- (unsigned long)
- elf_prot, (unsigned long) elf_type,
- (unsigned long)
- (eppnt->p_offset & 0xfffff000));
-
- down_write(&current->mm->mmap_sem);
- error = do_mmap(interpreter, vaddr,
- eppnt->p_filesz + (eppnt->p_vaddr & 0xfff),
- elf_prot, elf_type,
- eppnt->p_offset & 0xfffff000);
- up_write(&current->mm->mmap_sem);
-
- if (error < 0 && error > -1024) {
- printk("Aieee IRIX interp mmap error=%d\n",
- error);
- break; /* Real error */
- }
- pr_debug("error=%08lx ", (unsigned long) error);
- if (!load_addr && interp_elf_ex->e_type == ET_DYN) {
- load_addr = error;
- pr_debug("load_addr = error ");
- }
-
- /*
- * Find the end of the file mapping for this phdr, and
- * keep track of the largest address we see for this.
- */
- k = eppnt->p_vaddr + eppnt->p_filesz;
- if (k > elf_bss)
- elf_bss = k;
-
- /* Do the same thing for the memory mapping - between
- * elf_bss and last_bss is the bss section.
- */
- k = eppnt->p_memsz + eppnt->p_vaddr;
- if (k > last_bss)
- last_bss = k;
- pr_debug("\n");
- }
- }
-
- /* Now use mmap to map the library into memory. */
- if (error < 0 && error > -1024) {
- pr_debug("got error %d\n", error);
- kfree(elf_phdata);
- return 0xffffffff;
- }
-
- /* Now fill out the bss section. First pad the last page up
- * to the page boundary, and then perform a mmap to make sure
- * that there are zero-mapped pages up to and including the
- * last bss page.
- */
- pr_debug("padzero(%08lx) ", (unsigned long) (elf_bss));
- padzero(elf_bss);
- len = (elf_bss + 0xfff) & 0xfffff000; /* What we have mapped so far */
-
- pr_debug("last_bss[%08lx] len[%08lx]\n", (unsigned long) last_bss,
- (unsigned long) len);
-
- /* Map the last of the bss segment */
- if (last_bss > len) {
- down_write(&current->mm->mmap_sem);
- do_brk(len, (last_bss - len));
- up_write(&current->mm->mmap_sem);
- }
- kfree(elf_phdata);
-
- *interp_load_addr = load_addr;
- return ((unsigned int) interp_elf_ex->e_entry);
-}
-
-/* Check sanity of IRIX elf executable header. */
-static int verify_binary(struct elfhdr *ehp, struct linux_binprm *bprm)
-{
- if (memcmp(ehp->e_ident, ELFMAG, SELFMAG) != 0)
- return -ENOEXEC;
-
- /* First of all, some simple consistency checks */
- if ((ehp->e_type != ET_EXEC && ehp->e_type != ET_DYN) ||
- !bprm->file->f_op->mmap) {
- return -ENOEXEC;
- }
-
- /* XXX Don't support N32 or 64bit binaries yet because they can
- * XXX and do execute 64 bit instructions and expect all registers
- * XXX to be 64 bit as well. We need to make the kernel save
- * XXX all registers as 64bits on cpu's capable of this at
- * XXX exception time plus frob the XTLB exception vector.
- */
- if ((ehp->e_flags & EF_MIPS_ABI2))
- return -ENOEXEC;
-
- return 0;
-}
-
-/*
- * This is where the detailed check is performed. Irix binaries
- * use interpreters with 'libc.so' in the name, so this function
- * can differentiate between Linux and Irix binaries.
- */
-static inline int look_for_irix_interpreter(char **name,
- struct file **interpreter,
- struct elfhdr *interp_elf_ex,
- struct elf_phdr *epp,
- struct linux_binprm *bprm, int pnum)
-{
- int i;
- int retval = -EINVAL;
- struct file *file = NULL;
-
- *name = NULL;
- for (i = 0; i < pnum; i++, epp++) {
- if (epp->p_type != PT_INTERP)
- continue;
-
- /* It is illegal to have two interpreters for one executable. */
- if (*name != NULL)
- goto out;
-
- *name = kmalloc(epp->p_filesz + strlen(IRIX_EMUL), GFP_KERNEL);
- if (!*name)
- return -ENOMEM;
-
- strcpy(*name, IRIX_EMUL);
- retval = kernel_read(bprm->file, epp->p_offset, (*name + 16),
- epp->p_filesz);
- if (retval < 0)
- goto out;
-
- file = open_exec(*name);
- if (IS_ERR(file)) {
- retval = PTR_ERR(file);
- goto out;
- }
- retval = kernel_read(file, 0, bprm->buf, 128);
- if (retval < 0)
- goto dput_and_out;
-
- *interp_elf_ex = *(struct elfhdr *) bprm->buf;
- }
- *interpreter = file;
- return 0;
-
-dput_and_out:
- fput(file);
-out:
- kfree(*name);
- return retval;
-}
-
-static inline int verify_irix_interpreter(struct elfhdr *ihp)
-{
- if (memcmp(ihp->e_ident, ELFMAG, SELFMAG) != 0)
- return -ELIBBAD;
- return 0;
-}
-
-#define EXEC_MAP_FLAGS (MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE | MAP_EXECUTABLE)
-
-static inline void map_executable(struct file *fp, struct elf_phdr *epp, int pnum,
- unsigned int *estack, unsigned int *laddr,
- unsigned int *scode, unsigned int *ebss,
- unsigned int *ecode, unsigned int *edata,
- unsigned int *ebrk)
-{
- unsigned int tmp;
- int i, prot;
-
- for (i = 0; i < pnum; i++, epp++) {
- if (epp->p_type != PT_LOAD)
- continue;
-
- /* Map it. */
- prot = (epp->p_flags & PF_R) ? PROT_READ : 0;
- prot |= (epp->p_flags & PF_W) ? PROT_WRITE : 0;
- prot |= (epp->p_flags & PF_X) ? PROT_EXEC : 0;
- down_write(&current->mm->mmap_sem);
- (void) do_mmap(fp, (epp->p_vaddr & 0xfffff000),
- (epp->p_filesz + (epp->p_vaddr & 0xfff)),
- prot, EXEC_MAP_FLAGS,
- (epp->p_offset & 0xfffff000));
- up_write(&current->mm->mmap_sem);
-
- /* Fixup location tracking vars. */
- if ((epp->p_vaddr & 0xfffff000) < *estack)
- *estack = (epp->p_vaddr & 0xfffff000);
- if (!*laddr)
- *laddr = epp->p_vaddr - epp->p_offset;
- if (epp->p_vaddr < *scode)
- *scode = epp->p_vaddr;
-
- tmp = epp->p_vaddr + epp->p_filesz;
- if (tmp > *ebss)
- *ebss = tmp;
- if ((epp->p_flags & PF_X) && *ecode < tmp)
- *ecode = tmp;
- if (*edata < tmp)
- *edata = tmp;
-
- tmp = epp->p_vaddr + epp->p_memsz;
- if (tmp > *ebrk)
- *ebrk = tmp;
- }
-
-}
-
-static inline int map_interpreter(struct elf_phdr *epp, struct elfhdr *ihp,
- struct file *interp, unsigned int *iladdr,
- int pnum, mm_segment_t old_fs,
- unsigned int *eentry)
-{
- int i;
-
- *eentry = 0xffffffff;
- for (i = 0; i < pnum; i++, epp++) {
- if (epp->p_type != PT_INTERP)
- continue;
-
- /* We should have fielded this error elsewhere... */
- if (*eentry != 0xffffffff)
- return -1;
-
- set_fs(old_fs);
- *eentry = load_irix_interp(ihp, interp, iladdr);
- old_fs = get_fs();
- set_fs(get_ds());
-
- fput(interp);
-
- if (*eentry == 0xffffffff)
- return -1;
- }
- return 0;
-}
-
-/*
- * IRIX maps a page at 0x200000 that holds information about the
- * process and the system, here we map the page and fill the
- * structure
- */
-static int irix_map_prda_page(void)
-{
- unsigned long v;
- struct prda *pp;
-
- down_write(&current->mm->mmap_sem);
- v = do_brk(PRDA_ADDRESS, PAGE_SIZE);
- up_write(&current->mm->mmap_sem);
-
- if (v != PRDA_ADDRESS)
- return v; /* v must be an error code */
-
- pp = (struct prda *) v;
- pp->prda_sys.t_pid = task_pid_vnr(current);
- pp->prda_sys.t_prid = read_c0_prid();
- pp->prda_sys.t_rpid = task_pid_vnr(current);
-
- /* We leave the rest set to zero */
-
- return 0;
-}
-
-
-
-/* These are the functions used to load ELF style executables and shared
- * libraries. There is no binary dependent code anywhere else.
- */
-static int load_irix_binary(struct linux_binprm * bprm, struct pt_regs * regs)
-{
- struct elfhdr elf_ex, interp_elf_ex;
- struct file *interpreter;
- struct elf_phdr *elf_phdata, *elf_ihdr, *elf_ephdr;
- unsigned int load_addr, elf_bss, elf_brk;
- unsigned int elf_entry, interp_load_addr = 0;
- unsigned int start_code, end_code, end_data, elf_stack;
- int retval, has_interp, has_ephdr, size, i;
- char *elf_interpreter;
- mm_segment_t old_fs;
-
- load_addr = 0;
- has_interp = has_ephdr = 0;
- elf_ihdr = elf_ephdr = NULL;
- elf_ex = *((struct elfhdr *) bprm->buf);
- retval = -ENOEXEC;
-
- if (verify_binary(&elf_ex, bprm))
- goto out;
-
- /*
- * Telling -o32 static binaries from Linux and Irix apart from each
- * other is difficult. There are 2 differences to be noted for static
- * binaries from the 2 operating systems:
- *
- * 1) Irix binaries have their .text section before their .init
- * section. Linux binaries are just the opposite.
- *
- * 2) Irix binaries usually have <= 12 sections and Linux
- * binaries have > 20.
- *
- * We will use Method #2 since Method #1 would require us to read in
- * the section headers which is way too much overhead. This appears
- * to work for everything we have ran into so far. If anyone has a
- * better method to tell the binaries apart, I'm listening.
- */
- if (elf_ex.e_shnum > 20)
- goto out;
-
- print_elfhdr(&elf_ex);
-
- /* Now read in all of the header information */
- size = elf_ex.e_phentsize * elf_ex.e_phnum;
- if (size > 65536)
- goto out;
- elf_phdata = kmalloc(size, GFP_KERNEL);
- if (elf_phdata == NULL) {
- retval = -ENOMEM;
- goto out;
- }
-
- retval = kernel_read(bprm->file, elf_ex.e_phoff, (char *)elf_phdata, size);
- if (retval < 0)
- goto out_free_ph;
-
- dump_phdrs(elf_phdata, elf_ex.e_phnum);
-
- /* Set some things for later. */
- for (i = 0; i < elf_ex.e_phnum; i++) {
- switch (elf_phdata[i].p_type) {
- case PT_INTERP:
- has_interp = 1;
- elf_ihdr = &elf_phdata[i];
- break;
- case PT_PHDR:
- has_ephdr = 1;
- elf_ephdr = &elf_phdata[i];
- break;
- };
- }
-
- pr_debug("\n");
-
- elf_bss = 0;
- elf_brk = 0;
-
- elf_stack = 0xffffffff;
- elf_interpreter = NULL;
- start_code = 0xffffffff;
- end_code = 0;
- end_data = 0;
-
- /*
- * If we get a return value, we change the value to be ENOEXEC
- * so that we can exit gracefully and the main binary format
- * search loop in 'fs/exec.c' will move onto the next handler
- * which should be the normal ELF binary handler.
- */
- retval = look_for_irix_interpreter(&elf_interpreter, &interpreter,
- &interp_elf_ex, elf_phdata, bprm,
- elf_ex.e_phnum);
- if (retval) {
- retval = -ENOEXEC;
- goto out_free_file;
- }
-
- if (elf_interpreter) {
- retval = verify_irix_interpreter(&interp_elf_ex);
- if (retval)
- goto out_free_interp;
- }
-
- /* OK, we are done with that, now set up the arg stuff,
- * and then start this sucker up.
- */
- retval = -E2BIG;
- if (!bprm->sh_bang && !bprm->p)
- goto out_free_interp;
-
- /* Flush all traces of the currently running executable */
- retval = flush_old_exec(bprm);
- if (retval)
- goto out_free_dentry;
-
- /* OK, This is the point of no return */
- current->mm->end_data = 0;
- current->mm->end_code = 0;
- current->mm->mmap = NULL;
- current->flags &= ~PF_FORKNOEXEC;
- elf_entry = (unsigned int) elf_ex.e_entry;
-
- /* Do this so that we can load the interpreter, if need be. We will
- * change some of these later.
- */
- setup_arg_pages(bprm, STACK_TOP, EXSTACK_DEFAULT);
- current->mm->start_stack = bprm->p;
-
- /* At this point, we assume that the image should be loaded at
- * fixed address, not at a variable address.
- */
- old_fs = get_fs();
- set_fs(get_ds());
-
- map_executable(bprm->file, elf_phdata, elf_ex.e_phnum, &elf_stack,
- &load_addr, &start_code, &elf_bss, &end_code,
- &end_data, &elf_brk);
-
- if (elf_interpreter) {
- retval = map_interpreter(elf_phdata, &interp_elf_ex,
- interpreter, &interp_load_addr,
- elf_ex.e_phnum, old_fs, &elf_entry);
- kfree(elf_interpreter);
- if (retval) {
- set_fs(old_fs);
- printk("Unable to load IRIX ELF interpreter\n");
- send_sig(SIGSEGV, current, 0);
- retval = 0;
- goto out_free_file;
- }
- }
-
- set_fs(old_fs);
-
- kfree(elf_phdata);
- set_personality(PER_IRIX32);
- set_binfmt(&irix_format);
- compute_creds(bprm);
- current->flags &= ~PF_FORKNOEXEC;
- bprm->p = (unsigned long)
- create_irix_tables((char *)bprm->p, bprm->argc, bprm->envc,
- (elf_interpreter ? &elf_ex : NULL),
- load_addr, interp_load_addr, regs, elf_ephdr);
- current->mm->start_brk = current->mm->brk = elf_brk;
- current->mm->end_code = end_code;
- current->mm->start_code = start_code;
- current->mm->end_data = end_data;
- current->mm->start_stack = bprm->p;
-
- /* Calling set_brk effectively mmaps the pages that we need for the
- * bss and break sections.
- */
- set_brk(elf_bss, elf_brk);
-
- /*
- * IRIX maps a page at 0x200000 which holds some system
- * information. Programs depend on this.
- */
- if (irix_map_prda_page())
- goto out_free_dentry;
-
- padzero(elf_bss);
-
- pr_debug("(start_brk) %lx\n" , (long) current->mm->start_brk);
- pr_debug("(end_code) %lx\n" , (long) current->mm->end_code);
- pr_debug("(start_code) %lx\n" , (long) current->mm->start_code);
- pr_debug("(end_data) %lx\n" , (long) current->mm->end_data);
- pr_debug("(start_stack) %lx\n" , (long) current->mm->start_stack);
- pr_debug("(brk) %lx\n" , (long) current->mm->brk);
-
-#if 0 /* XXX No fucking way dude... */
- /* Why this, you ask??? Well SVr4 maps page 0 as read-only,
- * and some applications "depend" upon this behavior.
- * Since we do not have the power to recompile these, we
- * emulate the SVr4 behavior. Sigh.
- */
- down_write(&current->mm->mmap_sem);
- (void) do_mmap(NULL, 0, 4096, PROT_READ | PROT_EXEC,
- MAP_FIXED | MAP_PRIVATE, 0);
- up_write(&current->mm->mmap_sem);
-#endif
-
- start_thread(regs, elf_entry, bprm->p);
- if (current->ptrace & PT_PTRACED)
- send_sig(SIGTRAP, current, 0);
- return 0;
-out:
- return retval;
-
-out_free_dentry:
- allow_write_access(interpreter);
- fput(interpreter);
-out_free_interp:
- kfree(elf_interpreter);
-out_free_file:
-out_free_ph:
- kfree(elf_phdata);
- goto out;
-}
-
-/* This is really simpleminded and specialized - we are loading an
- * a.out library that is given an ELF header.
- */
-static int load_irix_library(struct file *file)
-{
- struct elfhdr elf_ex;
- struct elf_phdr *elf_phdata = NULL;
- unsigned int len = 0;
- int elf_bss = 0;
- int retval;
- unsigned int bss;
- int error;
- int i, j, k;
-
- error = kernel_read(file, 0, (char *) &elf_ex, sizeof(elf_ex));
- if (error != sizeof(elf_ex))
- return -ENOEXEC;
-
- if (memcmp(elf_ex.e_ident, ELFMAG, SELFMAG) != 0)
- return -ENOEXEC;
-
- /* First of all, some simple consistency checks. */
- if (elf_ex.e_type != ET_EXEC || elf_ex.e_phnum > 2 ||
- !file->f_op->mmap)
- return -ENOEXEC;
-
- /* Now read in all of the header information. */
- if (sizeof(struct elf_phdr) * elf_ex.e_phnum > PAGE_SIZE)
- return -ENOEXEC;
-
- elf_phdata = kmalloc(sizeof(struct elf_phdr) * elf_ex.e_phnum, GFP_KERNEL);
- if (elf_phdata == NULL)
- return -ENOMEM;
-
- retval = kernel_read(file, elf_ex.e_phoff, (char *) elf_phdata,
- sizeof(struct elf_phdr) * elf_ex.e_phnum);
-
- j = 0;
- for (i=0; i<elf_ex.e_phnum; i++)
- if ((elf_phdata + i)->p_type == PT_LOAD) j++;
-
- if (j != 1) {
- kfree(elf_phdata);
- return -ENOEXEC;
- }
-
- while (elf_phdata->p_type != PT_LOAD) elf_phdata++;
-
- /* Now use mmap to map the library into memory. */
- down_write(&current->mm->mmap_sem);
- error = do_mmap(file,
- elf_phdata->p_vaddr & 0xfffff000,
- elf_phdata->p_filesz + (elf_phdata->p_vaddr & 0xfff),
- PROT_READ | PROT_WRITE | PROT_EXEC,
- MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE,
- elf_phdata->p_offset & 0xfffff000);
- up_write(&current->mm->mmap_sem);
-
- k = elf_phdata->p_vaddr + elf_phdata->p_filesz;
- if (k > elf_bss) elf_bss = k;
-
- if (error != (elf_phdata->p_vaddr & 0xfffff000)) {
- kfree(elf_phdata);
- return error;
- }
-
- padzero(elf_bss);
-
- len = (elf_phdata->p_filesz + elf_phdata->p_vaddr+ 0xfff) & 0xfffff000;
- bss = elf_phdata->p_memsz + elf_phdata->p_vaddr;
- if (bss > len) {
- down_write(&current->mm->mmap_sem);
- do_brk(len, bss-len);
- up_write(&current->mm->mmap_sem);
- }
- kfree(elf_phdata);
- return 0;
-}
-
-/* Called through irix_syssgi() to map an elf image given an FD,
- * a phdr ptr USER_PHDRP in userspace, and a count CNT telling how many
- * phdrs there are in the USER_PHDRP array. We return the vaddr the
- * first phdr was successfully mapped to.
- */
-unsigned long irix_mapelf(int fd, struct elf_phdr __user *user_phdrp, int cnt)
-{
- unsigned long type, vaddr, filesz, offset, flags;
- struct elf_phdr __user *hp;
- struct file *filp;
- int i, retval;
-
- pr_debug("irix_mapelf: fd[%d] user_phdrp[%p] cnt[%d]\n",
- fd, user_phdrp, cnt);
-
- /* First get the verification out of the way. */
- hp = user_phdrp;
- if (!access_ok(VERIFY_READ, hp, (sizeof(struct elf_phdr) * cnt))) {
- pr_debug("irix_mapelf: bad pointer to ELF PHDR!\n");
-
- return -EFAULT;
- }
-
- dump_phdrs(user_phdrp, cnt);
-
- for (i = 0; i < cnt; i++, hp++) {
- if (__get_user(type, &hp->p_type))
- return -EFAULT;
- if (type != PT_LOAD) {
- printk("irix_mapelf: One section is not PT_LOAD!\n");
- return -ENOEXEC;
- }
- }
-
- filp = fget(fd);
- if (!filp)
- return -EACCES;
- if (!filp->f_op) {
- printk("irix_mapelf: Bogon filp!\n");
- fput(filp);
- return -EACCES;
- }
-
- hp = user_phdrp;
- for (i = 0; i < cnt; i++, hp++) {
- int prot;
-
- retval = __get_user(vaddr, &hp->p_vaddr);
- retval |= __get_user(filesz, &hp->p_filesz);
- retval |= __get_user(offset, &hp->p_offset);
- retval |= __get_user(flags, &hp->p_flags);
- if (retval)
- return retval;
-
- prot = (flags & PF_R) ? PROT_READ : 0;
- prot |= (flags & PF_W) ? PROT_WRITE : 0;
- prot |= (flags & PF_X) ? PROT_EXEC : 0;
-
- down_write(&current->mm->mmap_sem);
- retval = do_mmap(filp, (vaddr & 0xfffff000),
- (filesz + (vaddr & 0xfff)),
- prot, (MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE),
- (offset & 0xfffff000));
- up_write(&current->mm->mmap_sem);
-
- if (retval != (vaddr & 0xfffff000)) {
- printk("irix_mapelf: do_mmap fails with %d!\n", retval);
- fput(filp);
- return retval;
- }
- }
-
- pr_debug("irix_mapelf: Success, returning %08lx\n",
- (unsigned long) user_phdrp->p_vaddr);
-
- fput(filp);
-
- if (__get_user(vaddr, &user_phdrp->p_vaddr))
- return -EFAULT;
-
- return vaddr;
-}
-
-/*
- * ELF core dumper
- *
- * Modelled on fs/exec.c:aout_core_dump()
- * Jeremy Fitzhardinge <jeremy@sw.oz.au>
- */
-
-/* These are the only things you should do on a core-file: use only these
- * functions to write out all the necessary info.
- */
-static int dump_write(struct file *file, const void __user *addr, int nr)
-{
- return file->f_op->write(file, (const char __user *) addr, nr, &file->f_pos) == nr;
-}
-
-static int dump_seek(struct file *file, off_t off)
-{
- if (file->f_op->llseek) {
- if (file->f_op->llseek(file, off, 0) != off)
- return 0;
- } else
- file->f_pos = off;
- return 1;
-}
-
-/* Decide whether a segment is worth dumping; default is yes to be
- * sure (missing info is worse than too much; etc).
- * Personally I'd include everything, and use the coredump limit...
- *
- * I think we should skip something. But I am not sure how. H.J.
- */
-static inline int maydump(struct vm_area_struct *vma)
-{
- if (!(vma->vm_flags & (VM_READ|VM_WRITE|VM_EXEC)))
- return 0;
-#if 1
- if (vma->vm_flags & (VM_WRITE|VM_GROWSUP|VM_GROWSDOWN))
- return 1;
- if (vma->vm_flags & (VM_READ|VM_EXEC|VM_EXECUTABLE|VM_SHARED))
- return 0;
-#endif
- return 1;
-}
-
-/* An ELF note in memory. */
-struct memelfnote
-{
- const char *name;
- int type;
- unsigned int datasz;
- void *data;
-};
-
-static int notesize(struct memelfnote *en)
-{
- int sz;
-
- sz = sizeof(struct elf_note);
- sz += roundup(strlen(en->name) + 1, 4);
- sz += roundup(en->datasz, 4);
-
- return sz;
-}
-
-#define DUMP_WRITE(addr, nr) \
- if (!dump_write(file, (addr), (nr))) \
- goto end_coredump;
-#define DUMP_SEEK(off) \
- if (!dump_seek(file, (off))) \
- goto end_coredump;
-
-static int writenote(struct memelfnote *men, struct file *file)
-{
- struct elf_note en;
-
- en.n_namesz = strlen(men->name) + 1;
- en.n_descsz = men->datasz;
- en.n_type = men->type;
-
- DUMP_WRITE(&en, sizeof(en));
- DUMP_WRITE(men->name, en.n_namesz);
- /* XXX - cast from long long to long to avoid need for libgcc.a */
- DUMP_SEEK(roundup((unsigned long)file->f_pos, 4)); /* XXX */
- DUMP_WRITE(men->data, men->datasz);
- DUMP_SEEK(roundup((unsigned long)file->f_pos, 4)); /* XXX */
-
- return 1;
-
-end_coredump:
- return 0;
-}
-#undef DUMP_WRITE
-#undef DUMP_SEEK
-
-#define DUMP_WRITE(addr, nr) \
- if (!dump_write(file, (addr), (nr))) \
- goto end_coredump;
-#define DUMP_SEEK(off) \
- if (!dump_seek(file, (off))) \
- goto end_coredump;
-
-/* Actual dumper.
- *
- * This is a two-pass process; first we find the offsets of the bits,
- * and then they are actually written out. If we run out of core limit
- * we just truncate.
- */
-static int irix_core_dump(long signr, struct pt_regs *regs, struct file *file, unsigned long limit)
-{
- int has_dumped = 0;
- mm_segment_t fs;
- int segs;
- int i;
- size_t size;
- struct vm_area_struct *vma;
- struct elfhdr elf;
- off_t offset = 0, dataoff;
- int numnote = 3;
- struct memelfnote notes[3];
- struct elf_prstatus prstatus; /* NT_PRSTATUS */
- elf_fpregset_t fpu; /* NT_PRFPREG */
- struct elf_prpsinfo psinfo; /* NT_PRPSINFO */
-
- /* Count what's needed to dump, up to the limit of coredump size. */
- segs = 0;
- size = 0;
- for (vma = current->mm->mmap; vma != NULL; vma = vma->vm_next) {
- if (maydump(vma))
- {
- int sz = vma->vm_end-vma->vm_start;
-
- if (size+sz >= limit)
- break;
- else
- size += sz;
- }
-
- segs++;
- }
- pr_debug("irix_core_dump: %d segs taking %d bytes\n", segs, size);
-
- /* Set up header. */
- memcpy(elf.e_ident, ELFMAG, SELFMAG);
- elf.e_ident[EI_CLASS] = ELFCLASS32;
- elf.e_ident[EI_DATA] = ELFDATA2LSB;
- elf.e_ident[EI_VERSION] = EV_CURRENT;
- elf.e_ident[EI_OSABI] = ELF_OSABI;
- memset(elf.e_ident+EI_PAD, 0, EI_NIDENT-EI_PAD);
-
- elf.e_type = ET_CORE;
- elf.e_machine = ELF_ARCH;
- elf.e_version = EV_CURRENT;
- elf.e_entry = 0;
- elf.e_phoff = sizeof(elf);
- elf.e_shoff = 0;
- elf.e_flags = 0;
- elf.e_ehsize = sizeof(elf);
- elf.e_phentsize = sizeof(struct elf_phdr);
- elf.e_phnum = segs+1; /* Include notes. */
- elf.e_shentsize = 0;
- elf.e_shnum = 0;
- elf.e_shstrndx = 0;
-
- fs = get_fs();
- set_fs(KERNEL_DS);
-
- has_dumped = 1;
- current->flags |= PF_DUMPCORE;
-
- DUMP_WRITE(&elf, sizeof(elf));
- offset += sizeof(elf); /* Elf header. */
- offset += (segs+1) * sizeof(struct elf_phdr); /* Program headers. */
-
- /* Set up the notes in similar form to SVR4 core dumps made
- * with info from their /proc.
- */
- memset(&psinfo, 0, sizeof(psinfo));
- memset(&prstatus, 0, sizeof(prstatus));
-
- notes[0].name = "CORE";
- notes[0].type = NT_PRSTATUS;
- notes[0].datasz = sizeof(prstatus);
- notes[0].data = &prstatus;
- prstatus.pr_info.si_signo = prstatus.pr_cursig = signr;
- prstatus.pr_sigpend = current->pending.signal.sig[0];
- prstatus.pr_sighold = current->blocked.sig[0];
- psinfo.pr_pid = prstatus.pr_pid = task_pid_vnr(current);
- psinfo.pr_ppid = prstatus.pr_ppid = task_pid_vnr(current->parent);
- psinfo.pr_pgrp = prstatus.pr_pgrp = task_pgrp_vnr(current);
- psinfo.pr_sid = prstatus.pr_sid = task_session_vnr(current);
- if (thread_group_leader(current)) {
- /*
- * This is the record for the group leader. Add in the
- * cumulative times of previous dead threads. This total
- * won't include the time of each live thread whose state
- * is included in the core dump. The final total reported
- * to our parent process when it calls wait4 will include
- * those sums as well as the little bit more time it takes
- * this and each other thread to finish dying after the
- * core dump synchronization phase.
- */
- jiffies_to_timeval(current->utime + current->signal->utime,
- &prstatus.pr_utime);
- jiffies_to_timeval(current->stime + current->signal->stime,
- &prstatus.pr_stime);
- } else {
- jiffies_to_timeval(current->utime, &prstatus.pr_utime);
- jiffies_to_timeval(current->stime, &prstatus.pr_stime);
- }
- jiffies_to_timeval(current->signal->cutime, &prstatus.pr_cutime);
- jiffies_to_timeval(current->signal->cstime, &prstatus.pr_cstime);
-
- if (sizeof(elf_gregset_t) != sizeof(struct pt_regs)) {
- printk("sizeof(elf_gregset_t) (%d) != sizeof(struct pt_regs) "
- "(%d)\n", sizeof(elf_gregset_t), sizeof(struct pt_regs));
- } else {
- *(struct pt_regs *)&prstatus.pr_reg = *regs;
- }
-
- notes[1].name = "CORE";
- notes[1].type = NT_PRPSINFO;
- notes[1].datasz = sizeof(psinfo);
- notes[1].data = &psinfo;
- i = current->state ? ffz(~current->state) + 1 : 0;
- psinfo.pr_state = i;
- psinfo.pr_sname = (i < 0 || i > 5) ? '.' : "RSDZTD"[i];
- psinfo.pr_zomb = psinfo.pr_sname == 'Z';
- psinfo.pr_nice = task_nice(current);
- psinfo.pr_flag = current->flags;
- psinfo.pr_uid = current->uid;
- psinfo.pr_gid = current->gid;
- {
- int i, len;
-
- set_fs(fs);
-
- len = current->mm->arg_end - current->mm->arg_start;
- len = len >= ELF_PRARGSZ ? ELF_PRARGSZ : len;
- (void *) copy_from_user(&psinfo.pr_psargs,
- (const char __user *)current->mm->arg_start, len);
- for (i = 0; i < len; i++)
- if (psinfo.pr_psargs[i] == 0)
- psinfo.pr_psargs[i] = ' ';
- psinfo.pr_psargs[len] = 0;
-
- set_fs(KERNEL_DS);
- }
- strlcpy(psinfo.pr_fname, current->comm, sizeof(psinfo.pr_fname));
-
- /* Try to dump the FPU. */
- prstatus.pr_fpvalid = dump_fpu(regs, &fpu);
- if (!prstatus.pr_fpvalid) {
- numnote--;
- } else {
- notes[2].name = "CORE";
- notes[2].type = NT_PRFPREG;
- notes[2].datasz = sizeof(fpu);
- notes[2].data = &fpu;
- }
-
- /* Write notes phdr entry. */
- {
- struct elf_phdr phdr;
- int sz = 0;
-
- for (i = 0; i < numnote; i++)
- sz += notesize(&notes[i]);
-
- phdr.p_type = PT_NOTE;
- phdr.p_offset = offset;
- phdr.p_vaddr = 0;
- phdr.p_paddr = 0;
- phdr.p_filesz = sz;
- phdr.p_memsz = 0;
- phdr.p_flags = 0;
- phdr.p_align = 0;
-
- offset += phdr.p_filesz;
- DUMP_WRITE(&phdr, sizeof(phdr));
- }
-
- /* Page-align dumped data. */
- dataoff = offset = roundup(offset, PAGE_SIZE);
-
- /* Write program headers for segments dump. */
- for (vma = current->mm->mmap, i = 0;
- i < segs && vma != NULL; vma = vma->vm_next) {
- struct elf_phdr phdr;
- size_t sz;
-
- i++;
-
- sz = vma->vm_end - vma->vm_start;
-
- phdr.p_type = PT_LOAD;
- phdr.p_offset = offset;
- phdr.p_vaddr = vma->vm_start;
- phdr.p_paddr = 0;
- phdr.p_filesz = maydump(vma) ? sz : 0;
- phdr.p_memsz = sz;
- offset += phdr.p_filesz;
- phdr.p_flags = vma->vm_flags & VM_READ ? PF_R : 0;
- if (vma->vm_flags & VM_WRITE)
- phdr.p_flags |= PF_W;
- if (vma->vm_flags & VM_EXEC)
- phdr.p_flags |= PF_X;
- phdr.p_align = PAGE_SIZE;
-
- DUMP_WRITE(&phdr, sizeof(phdr));
- }
-
- for (i = 0; i < numnote; i++)
- if (!writenote(&notes[i], file))
- goto end_coredump;
-
- set_fs(fs);
-
- DUMP_SEEK(dataoff);
-
- for (i = 0, vma = current->mm->mmap;
- i < segs && vma != NULL;
- vma = vma->vm_next) {
- unsigned long addr = vma->vm_start;
- unsigned long len = vma->vm_end - vma->vm_start;
-
- if (!maydump(vma))
- continue;
- i++;
- pr_debug("elf_core_dump: writing %08lx %lx\n", addr, len);
- DUMP_WRITE((void __user *)addr, len);
- }
-
- if ((off_t) file->f_pos != offset) {
- /* Sanity check. */
- printk("elf_core_dump: file->f_pos (%ld) != offset (%ld)\n",
- (off_t) file->f_pos, offset);
- }
-
-end_coredump:
- set_fs(fs);
- return has_dumped;
-}
-
-static int __init init_irix_binfmt(void)
-{
- extern int init_inventory(void);
- extern asmlinkage unsigned long sys_call_table;
- extern asmlinkage unsigned long sys_call_table_irix5;
-
- init_inventory();
-
- /*
- * Copy the IRIX5 syscall table (8000 bytes) into the main syscall
- * table. The IRIX5 calls are located by an offset of 8000 bytes
- * from the beginning of the main table.
- */
- memcpy((void *) ((unsigned long) &sys_call_table + 8000),
- &sys_call_table_irix5, 8000);
-
- return register_binfmt(&irix_format);
-}
-
-static void __exit exit_irix_binfmt(void)
-{
- /*
- * Remove the Irix ELF loader.
- */
- unregister_binfmt(&irix_format);
-}
-
-module_init(init_irix_binfmt)
-module_exit(exit_irix_binfmt)
OpenPOWER on IntegriCloud