patch-2.1.40 linux/arch/sparc64/kernel/sparcelf32.c
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- Lines: 1282
- Date:
Wed Dec 31 16:00:00 1969
- Orig file:
v2.1.39/linux/arch/sparc64/kernel/sparcelf32.c
- Orig date:
Thu May 15 16:48:02 1997
diff -u --recursive --new-file v2.1.39/linux/arch/sparc64/kernel/sparcelf32.c linux/arch/sparc64/kernel/sparcelf32.c
@@ -1,1281 +0,0 @@
-/* sparcelf32.c: Support 32-bit Sparc ELF binaries on Ultra.
- *
- * This is just binfmt_elf.c with hooks so that the types are those
- * for a 32-bit ELF binaries.
- */
-
-/* This makes it work. */
-#define ELF_ARCH EM_SPARC
-#define ELF_CLASS ELFCLASS32
-#define ELF_DATA ELFDATA2MSB;
-
-/*
- * linux/fs/binfmt_elf.c
- *
- * These are the functions used to load ELF format executables as used
- * on SVr4 machines. Information on the format may be found in the book
- * "UNIX SYSTEM V RELEASE 4 Programmers Guide: Ansi C and Programming Support
- * Tools".
- *
- * 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/a.out.h>
-#include <linux/errno.h>
-#include <linux/signal.h>
-#include <linux/binfmts.h>
-#include <linux/string.h>
-#include <linux/fcntl.h>
-#include <linux/ptrace.h>
-#include <linux/malloc.h>
-#include <linux/shm.h>
-#include <linux/personality.h>
-#include <linux/elfcore.h>
-#include <linux/init.h>
-
-#include <asm/uaccess.h>
-#include <asm/pgtable.h>
-
-#include <linux/config.h>
-
-#define DLINFO_ITEMS 12
-
-#include <linux/elf.h>
-
-static int load_elf32_binary(struct linux_binprm * bprm, struct pt_regs * regs);
-static int load_elf32_library(int fd);
-extern int dump_fpu (struct pt_regs *, elf_fpregset_t *);
-extern void dump_thread(struct pt_regs *, struct user *);
-
-extern unsigned long get_unmapped_area(unsigned long addr, unsigned long len);
-
-/*
- * If we don't support core dumping, then supply a NULL so we
- * don't even try.
- */
-#ifdef USE_ELF_CORE_DUMP
-static int elf32_core_dump(long signr, struct pt_regs * regs);
-#else
-#define elf32_core_dump NULL
-#endif
-
-#define ELF_PAGESTART(_v) ((_v) & ~(unsigned long)(ELF_EXEC_PAGESIZE-1))
-#define ELF_PAGEOFFSET(_v) ((_v) & (ELF_EXEC_PAGESIZE-1))
-
-static struct linux_binfmt elf32_format = {
-#ifndef MODULE
- NULL, NULL, load_elf32_binary, load_elf32_library, elf32_core_dump
-#else
- NULL, &__this_module, load_elf32_binary, load_elf32_library, elf32_core_dump
-#endif
-};
-
-static void set_brk(unsigned long start, unsigned long end)
-{
- start = PAGE_ALIGN(start);
- end = PAGE_ALIGN(end);
- if (end <= start)
- return;
- do_mmap(NULL, start, end - start,
- PROT_READ | PROT_WRITE | PROT_EXEC,
- MAP_FIXED | MAP_PRIVATE, 0);
-}
-
-
-/* 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 *) elf_bss, nbyte);
- }
-}
-
-__u32 *create_elf32_tables(char *p, int argc, int envc,
- struct elfhdr * exec,
- unsigned long load_addr,
- unsigned long interp_load_addr, int ibcs)
-{
- __u32 *argv, *envp;
- __u32 *sp, *csp;
-
- /*
- * Force 16 byte alignment here for generality.
- */
- sp = (__u32 *) (~15UL & (unsigned long) p);
- csp = sp;
- csp -= exec ? DLINFO_ITEMS*2 : 2;
- csp -= envc+1;
- csp -= argc+1;
- if (!(((unsigned long) csp) & 4))
- 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, PAGE_SIZE);
- NEW_AUX_ENT (4, AT_BASE, interp_load_addr);
- NEW_AUX_ENT (5, AT_FLAGS, 0);
- NEW_AUX_ENT (6, AT_ENTRY, (__u32) exec->e_entry);
- NEW_AUX_ENT (7, AT_UID, (__u32) current->uid);
- NEW_AUX_ENT (8, AT_EUID, (__u32) current->euid);
- NEW_AUX_ENT (9, AT_GID, (__u32) current->gid);
- NEW_AUX_ENT (10, AT_EGID, (__u32) current->egid);
- }
-#undef NEW_AUX_ENT
-
- sp -= envc+1;
- envp = (__u32 *) sp;
- sp -= argc+1;
- argv = (__u32 *) sp;
- if (!ibcs) {
- __put_user(((__u32)(long) envp),--sp);
- __put_user(((__u32)(long) argv),--sp);
- }
-
- __put_user((__u32)argc,--sp);
- current->mm->arg_start = (unsigned long) p;
- while (argc-->0) {
- __put_user(((__u32)(long)p),argv++);
- p += strlen_user(p);
- }
- __put_user(NULL, argv);
- current->mm->arg_end = current->mm->env_start = (unsigned long) p;
- while (envc-->0) {
- __put_user(((__u32)(long)p),envp++);
- p += strlen_user(p);
- }
- __put_user(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 long load_elf32_interp(struct elfhdr * interp_elf_ex,
- struct inode * interpreter_inode,
- unsigned long *interp_load_addr)
-{
- struct file * file;
- struct elf_phdr *elf_phdata = NULL;
- struct elf_phdr *eppnt;
- unsigned long load_addr;
- int load_addr_set = 0;
- int elf_exec_fileno;
- int retval;
- unsigned long last_bss, elf_bss;
- unsigned long error;
- int i;
-
- elf_bss = 0;
- last_bss = 0;
- error = load_addr = 0;
-
- /* First of all, some simple consistency checks */
- if ((interp_elf_ex->e_type != ET_EXEC &&
- interp_elf_ex->e_type != ET_DYN) ||
- !elf_check_arch(interp_elf_ex->e_machine) ||
- (!interpreter_inode->i_op ||
- !interpreter_inode->i_op->default_file_ops->mmap)){
- return ~0UL;
- }
-
- /* Now read in all of the header information */
-
- if (sizeof(struct elf_phdr) * interp_elf_ex->e_phnum > PAGE_SIZE)
- return ~0UL;
-
- elf_phdata = (struct elf_phdr *)
- kmalloc(sizeof(struct elf_phdr) * interp_elf_ex->e_phnum,
- GFP_KERNEL);
- if (!elf_phdata)
- return ~0UL;
-
- /*
- * If the size of this structure has changed, then punt, since
- * we will be doing the wrong thing.
- */
- if (interp_elf_ex->e_phentsize != sizeof(struct elf_phdr))
- {
- kfree(elf_phdata);
- return ~0UL;
- }
-
- retval = read_exec(interpreter_inode, interp_elf_ex->e_phoff,
- (char *) elf_phdata,
- sizeof(struct elf_phdr) * interp_elf_ex->e_phnum, 1);
-
- if (retval < 0) {
- kfree (elf_phdata);
- return retval;
- }
-
- elf_exec_fileno = open_inode(interpreter_inode, O_RDONLY);
- if (elf_exec_fileno < 0) {
- kfree(elf_phdata);
- return ~0UL;
- }
-
- file = current->files->fd[elf_exec_fileno];
-
- 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;
- unsigned long k;
-
- 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;
- if (interp_elf_ex->e_type == ET_EXEC || load_addr_set) {
- elf_type |= MAP_FIXED;
- vaddr = eppnt->p_vaddr;
- } else {
- load_addr = get_unmapped_area(0, eppnt->p_filesz +
- ELF_PAGEOFFSET(eppnt->p_vaddr));
- }
-
- error = do_mmap(file,
- load_addr + ELF_PAGESTART(vaddr),
- eppnt->p_filesz + ELF_PAGEOFFSET(eppnt->p_vaddr),
- elf_prot,
- elf_type,
- eppnt->p_offset - ELF_PAGEOFFSET(eppnt->p_vaddr));
-
- if (error > -1024UL) {
- /* Real error */
- sys_close(elf_exec_fileno);
- kfree(elf_phdata);
- return ~0UL;
- }
-
- if (!load_addr_set && interp_elf_ex->e_type == ET_DYN) {
- load_addr = error;
- load_addr_set = 1;
- }
-
- /*
- * Find the end of the file mapping for this phdr, and keep
- * track of the largest address we see for this.
- */
- k = load_addr + 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 = load_addr + eppnt->p_memsz + eppnt->p_vaddr;
- if (k > last_bss) last_bss = k;
- }
-
- /* Now use mmap to map the library into memory. */
-
- sys_close(elf_exec_fileno);
-
- /*
- * 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 zeromapped pages up to and including the last
- * bss page.
- */
- padzero(elf_bss);
- elf_bss = ELF_PAGESTART(elf_bss + ELF_EXEC_PAGESIZE - 1); /* What we have mapped so far */
-
- /* Map the last of the bss segment */
- if (last_bss > elf_bss)
- do_mmap(NULL, elf_bss, last_bss-elf_bss,
- PROT_READ|PROT_WRITE|PROT_EXEC,
- MAP_FIXED|MAP_PRIVATE, 0);
- kfree(elf_phdata);
-
- *interp_load_addr = load_addr;
- return ((unsigned long) interp_elf_ex->e_entry) + load_addr;
-}
-
-static unsigned long load_aout32_interp(struct exec * interp_ex,
- struct inode * interpreter_inode)
-{
- int retval;
- unsigned long elf_entry;
-
- current->mm->brk = interp_ex->a_bss +
- (current->mm->end_data = interp_ex->a_data +
- (current->mm->end_code = interp_ex->a_text));
- elf_entry = interp_ex->a_entry;
-
-
- if (N_MAGIC(*interp_ex) == OMAGIC) {
- do_mmap(NULL, 0, interp_ex->a_text+interp_ex->a_data,
- PROT_READ|PROT_WRITE|PROT_EXEC,
- MAP_FIXED|MAP_PRIVATE, 0);
- retval = read_exec(interpreter_inode, 32, (char *) 0,
- interp_ex->a_text+interp_ex->a_data, 0);
- } else if (N_MAGIC(*interp_ex) == ZMAGIC || N_MAGIC(*interp_ex) == QMAGIC) {
- do_mmap(NULL, 0, interp_ex->a_text+interp_ex->a_data,
- PROT_READ|PROT_WRITE|PROT_EXEC,
- MAP_FIXED|MAP_PRIVATE, 0);
- retval = read_exec(interpreter_inode,
- N_TXTOFF(*interp_ex) ,
- (char *) N_TXTADDR(*interp_ex),
- interp_ex->a_text+interp_ex->a_data, 0);
- } else
- retval = -1;
-
- if (retval >= 0)
- do_mmap(NULL, ELF_PAGESTART(interp_ex->a_text + interp_ex->a_data + ELF_EXEC_PAGESIZE - 1),
- interp_ex->a_bss,
- PROT_READ|PROT_WRITE|PROT_EXEC,
- MAP_FIXED|MAP_PRIVATE, 0);
- if (retval < 0) return ~0UL;
- return elf_entry;
-}
-
-/*
- * These are the functions used to load ELF style executables and shared
- * libraries. There is no binary dependent code anywhere else.
- */
-
-#define INTERPRETER_NONE 0
-#define INTERPRETER_AOUT 1
-#define INTERPRETER_ELF 2
-
-static inline int
-do_load_elf32_binary(struct linux_binprm * bprm, struct pt_regs * regs)
-{
- struct elfhdr elf_ex;
- struct elfhdr interp_elf_ex;
- struct file * file;
- struct exec interp_ex;
- struct inode *interpreter_inode;
- unsigned long load_addr;
- int load_addr_set = 0;
- unsigned int interpreter_type = INTERPRETER_NONE;
- unsigned char ibcs2_interpreter;
- int i;
- int old_fs;
- int error;
- struct elf_phdr * elf_ppnt, *elf_phdata;
- int elf_exec_fileno;
- unsigned long elf_bss, k, elf_brk;
- int retval;
- char * elf_interpreter;
- unsigned long elf_entry, interp_load_addr = 0;
- int status;
- unsigned long start_code, end_code, end_data;
- unsigned long elf_stack;
- char passed_fileno[6];
-
- ibcs2_interpreter = 0;
- status = 0;
- load_addr = 0;
- elf_ex = *((struct elfhdr *) bprm->buf); /* exec-header */
-
- if (elf_ex.e_ident[0] != 0x7f ||
- strncmp(&elf_ex.e_ident[1], "ELF",3) != 0) {
- return -ENOEXEC;
- }
-
-
- /* First of all, some simple consistency checks */
- if ((elf_ex.e_type != ET_EXEC &&
- elf_ex.e_type != ET_DYN) ||
- (! elf_check_arch(elf_ex.e_machine)) ||
- (!bprm->inode->i_op || !bprm->inode->i_op->default_file_ops ||
- !bprm->inode->i_op->default_file_ops->mmap)){
- return -ENOEXEC;
- }
-
- /* Now read in all of the header information */
-
- elf_phdata = (struct elf_phdr *) kmalloc(elf_ex.e_phentsize *
- elf_ex.e_phnum, GFP_KERNEL);
- if (elf_phdata == NULL) {
- return -ENOMEM;
- }
-
- retval = read_exec(bprm->inode, elf_ex.e_phoff, (char *) elf_phdata,
- elf_ex.e_phentsize * elf_ex.e_phnum, 1);
- if (retval < 0) {
- kfree (elf_phdata);
- return retval;
- }
-
- elf_ppnt = elf_phdata;
-
- elf_bss = 0;
- elf_brk = 0;
-
- elf_exec_fileno = open_inode(bprm->inode, O_RDONLY);
-
- if (elf_exec_fileno < 0) {
- kfree (elf_phdata);
- return elf_exec_fileno;
- }
-
- file = current->files->fd[elf_exec_fileno];
-
- elf_stack = ~0UL;
- elf_interpreter = NULL;
- start_code = ~0UL;
- end_code = 0;
- end_data = 0;
-
- for(i=0;i < elf_ex.e_phnum; i++){
- if (elf_ppnt->p_type == PT_INTERP) {
- if ( elf_interpreter != NULL )
- {
- kfree (elf_phdata);
- kfree(elf_interpreter);
- sys_close(elf_exec_fileno);
- return -EINVAL;
- }
-
- /* This is the program interpreter used for
- * shared libraries - for now assume that this
- * is an a.out format binary
- */
-
- elf_interpreter = (char *) kmalloc(elf_ppnt->p_filesz,
- GFP_KERNEL);
- if (elf_interpreter == NULL) {
- kfree (elf_phdata);
- sys_close(elf_exec_fileno);
- return -ENOMEM;
- }
-
- retval = read_exec(bprm->inode,elf_ppnt->p_offset,
- elf_interpreter,
- elf_ppnt->p_filesz, 1);
- /* If the program interpreter is one of these two,
- then assume an iBCS2 image. Otherwise assume
- a native linux image. */
- if (strcmp(elf_interpreter,"/usr/lib/libc.so.1") == 0 ||
- strcmp(elf_interpreter,"/usr/lib/ld.so.1") == 0)
- ibcs2_interpreter = 1;
-#if 0
- printk("Using ELF interpreter %s\n", elf_interpreter);
-#endif
- if (retval >= 0) {
- old_fs = get_fs(); /* This could probably be optimized */
- set_fs(get_ds());
- retval = open_namei(elf_interpreter, 0, 0,
- &interpreter_inode, NULL);
- set_fs(old_fs);
- }
-
- if (retval >= 0)
- retval = read_exec(interpreter_inode,0,bprm->buf,128, 1);
-
- if (retval >= 0) {
- interp_ex = *((struct exec *) bprm->buf); /* exec-header */
- interp_elf_ex = *((struct elfhdr *) bprm->buf); /* exec-header */
-
- }
- if (retval < 0) {
- kfree (elf_phdata);
- kfree(elf_interpreter);
- sys_close(elf_exec_fileno);
- return retval;
- }
- }
- elf_ppnt++;
- }
-
- /* Some simple consistency checks for the interpreter */
- if (elf_interpreter){
- interpreter_type = INTERPRETER_ELF | INTERPRETER_AOUT;
-
- /* Now figure out which format our binary is */
- if ((N_MAGIC(interp_ex) != OMAGIC) &&
- (N_MAGIC(interp_ex) != ZMAGIC) &&
- (N_MAGIC(interp_ex) != QMAGIC))
- interpreter_type = INTERPRETER_ELF;
-
- if (interp_elf_ex.e_ident[0] != 0x7f ||
- strncmp(&interp_elf_ex.e_ident[1], "ELF",3) != 0)
- interpreter_type &= ~INTERPRETER_ELF;
-
- if (!interpreter_type)
- {
- kfree(elf_interpreter);
- kfree(elf_phdata);
- sys_close(elf_exec_fileno);
- return -ELIBBAD;
- }
- }
-
- /* OK, we are done with that, now set up the arg stuff,
- and then start this sucker up */
-
- if (!bprm->sh_bang) {
- char * passed_p;
-
- if (interpreter_type == INTERPRETER_AOUT) {
- sprintf(passed_fileno, "%d", elf_exec_fileno);
- passed_p = passed_fileno;
-
- if (elf_interpreter) {
- bprm->p = copy_strings(1,&passed_p,bprm->page,bprm->p,2);
- bprm->argc++;
- }
- }
- if (!bprm->p) {
- if (elf_interpreter) {
- kfree(elf_interpreter);
- }
- kfree (elf_phdata);
- sys_close(elf_exec_fileno);
- return -E2BIG;
- }
- }
-
- /* OK, This is the point of no return */
- flush_old_exec(bprm);
-
- current->mm->end_data = 0;
- current->mm->end_code = 0;
- current->mm->start_mmap = ELF_START_MMAP;
- current->mm->mmap = NULL;
- elf_entry = (unsigned long) elf_ex.e_entry;
-
- /* Do this so that we can load the interpreter, if need be. We will
- change some of these later */
- current->mm->rss = 0;
- current->tss.flags |= SPARC_FLAG_32BIT;
- bprm->p = setup_arg_pages(bprm->p, bprm);
- current->mm->start_stack = bprm->p;
-
- /* Now we do a little grungy work by mmaping the ELF image into
- the correct location in memory. 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());
- for(i = 0, elf_ppnt = elf_phdata; i < elf_ex.e_phnum; i++, elf_ppnt++) {
- if (elf_ppnt->p_type == PT_LOAD) {
- int elf_prot = 0;
- if (elf_ppnt->p_flags & PF_R) elf_prot |= PROT_READ;
- if (elf_ppnt->p_flags & PF_W) elf_prot |= PROT_WRITE;
- if (elf_ppnt->p_flags & PF_X) elf_prot |= PROT_EXEC;
-
- error = do_mmap(file,
- ELF_PAGESTART(elf_ppnt->p_vaddr),
- (elf_ppnt->p_filesz +
- ELF_PAGEOFFSET(elf_ppnt->p_vaddr)),
- elf_prot,
- (MAP_FIXED | MAP_PRIVATE |
- MAP_DENYWRITE | MAP_EXECUTABLE),
- (elf_ppnt->p_offset -
- ELF_PAGEOFFSET(elf_ppnt->p_vaddr)));
-
-#ifdef LOW_ELF_STACK
- if (ELF_PAGESTART(elf_ppnt->p_vaddr) < elf_stack)
- elf_stack = ELF_PAGESTART(elf_ppnt->p_vaddr);
-#endif
-
- if (!load_addr_set) {
- load_addr = elf_ppnt->p_vaddr - elf_ppnt->p_offset;
- load_addr_set = 1;
- }
- k = elf_ppnt->p_vaddr;
- if (k < start_code) start_code = k;
- k = elf_ppnt->p_vaddr + elf_ppnt->p_filesz;
- if (k > elf_bss) elf_bss = k;
-#if 1
- if ((elf_ppnt->p_flags & PF_X) && end_code < k)
-#else
- if ( !(elf_ppnt->p_flags & PF_W) && end_code < k)
-#endif
- end_code = k;
- if (end_data < k) end_data = k;
- k = elf_ppnt->p_vaddr + elf_ppnt->p_memsz;
- if (k > elf_brk) elf_brk = k;
- }
- }
- set_fs(old_fs);
-
- if (elf_interpreter) {
- if (interpreter_type & 1)
- elf_entry = load_aout32_interp(&interp_ex,
- interpreter_inode);
- else if (interpreter_type & 2)
- elf_entry = load_elf32_interp(&interp_elf_ex,
- interpreter_inode,
- &interp_load_addr);
-
- iput(interpreter_inode);
- kfree(elf_interpreter);
-
- if (elf_entry == ~0UL) {
- printk("Unable to load interpreter\n");
- kfree(elf_phdata);
- send_sig(SIGSEGV, current, 0);
- return 0;
- }
- }
-
- kfree(elf_phdata);
-
- if (interpreter_type != INTERPRETER_AOUT) sys_close(elf_exec_fileno);
- current->personality = (ibcs2_interpreter ? PER_SVR4 : PER_LINUX);
-
- if (current->exec_domain && current->exec_domain->module)
- __MOD_DEC_USE_COUNT(current->exec_domain->module);
- if (current->binfmt && current->binfmt->module)
- __MOD_DEC_USE_COUNT(current->binfmt->module);
- current->exec_domain = lookup_exec_domain(current->personality);
- current->binfmt = &elf32_format;
- if (current->exec_domain && current->exec_domain->module)
- __MOD_INC_USE_COUNT(current->exec_domain->module);
- if (current->binfmt && current->binfmt->module)
- __MOD_INC_USE_COUNT(current->binfmt->module);
-
-#ifndef VM_STACK_FLAGS
- current->executable = bprm->inode;
- bprm->inode->i_count++;
-#endif
-#ifdef LOW_ELF_STACK
- current->start_stack = bprm->p = elf_stack - 4;
-#endif
- current->suid = current->euid = current->fsuid = bprm->e_uid;
- current->sgid = current->egid = current->fsgid = bprm->e_gid;
- current->flags &= ~PF_FORKNOEXEC;
- bprm->p = (unsigned long)
- create_elf32_tables((char *)bprm->p,
- bprm->argc,
- bprm->envc,
- (interpreter_type == INTERPRETER_ELF ? &elf_ex : NULL),
- load_addr,
- interp_load_addr,
- (interpreter_type == INTERPRETER_AOUT ? 0 : 1));
- if (interpreter_type == INTERPRETER_AOUT)
- current->mm->arg_start += strlen(passed_fileno) + 1;
- 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);
-
- padzero(elf_bss);
-
-#if 0
- printk("(start_brk) %x\n" , current->mm->start_brk);
- printk("(end_code) %x\n" , current->mm->end_code);
- printk("(start_code) %x\n" , current->mm->start_code);
- printk("(end_data) %x\n" , current->mm->end_data);
- printk("(start_stack) %x\n" , current->mm->start_stack);
- printk("(brk) %x\n" , current->mm->brk);
-#endif
-
- if ( current->personality == PER_SVR4 )
- {
- /* 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. */
- error = do_mmap(NULL, 0, 4096, PROT_READ | PROT_EXEC,
- MAP_FIXED | MAP_PRIVATE, 0);
- }
-
-#ifdef ELF_PLAT_INIT
- /*
- * The ABI may specify that certain registers be set up in special
- * ways (on i386 %edx is the address of a DT_FINI function, for
- * example. This macro performs whatever initialization to
- * the regs structure is required.
- */
- ELF_PLAT_INIT(regs);
-#endif
-
-
- start_thread32(regs, elf_entry, bprm->p);
- if (current->flags & PF_PTRACED)
- send_sig(SIGTRAP, current, 0);
- return 0;
-}
-
-static int
-load_elf32_binary(struct linux_binprm * bprm, struct pt_regs * regs)
-{
- int retval;
-
- MOD_INC_USE_COUNT;
- retval = do_load_elf32_binary(bprm, regs);
- MOD_DEC_USE_COUNT;
- return retval;
-}
-
-/* This is really simpleminded and specialized - we are loading an
- a.out library that is given an ELF header. */
-
-static inline int
-do_load_elf32_library(int fd){
- struct file * file;
- struct elfhdr elf_ex;
- struct elf_phdr *elf_phdata = NULL;
- struct inode * inode;
- unsigned long len;
- int elf_bss;
- int retval;
- unsigned long bss;
- int error;
- int i,j, k;
-
- len = 0;
- file = current->files->fd[fd];
- inode = file->f_inode;
- elf_bss = 0;
-
- if (!file || !file->f_op)
- return -EACCES;
-
- /* seek to the beginning of the file */
- if (file->f_op->llseek) {
- if ((error = file->f_op->llseek(inode, file, 0, 0)) != 0)
- return -ENOEXEC;
- } else
- file->f_pos = 0;
-
- set_fs(KERNEL_DS);
- error = file->f_op->read(inode, file, (char *) &elf_ex, sizeof(elf_ex));
- set_fs(USER_DS);
- if (error != sizeof(elf_ex))
- return -ENOEXEC;
-
- if (elf_ex.e_ident[0] != 0x7f ||
- strncmp(&elf_ex.e_ident[1], "ELF",3) != 0)
- return -ENOEXEC;
-
- /* First of all, some simple consistency checks */
- if (elf_ex.e_type != ET_EXEC || elf_ex.e_phnum > 2 ||
- !elf_check_arch(elf_ex.e_machine) ||
- (!inode->i_op || !inode->i_op->default_file_ops->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 = (struct elf_phdr *)
- kmalloc(sizeof(struct elf_phdr) * elf_ex.e_phnum, GFP_KERNEL);
- if (elf_phdata == NULL)
- return -ENOMEM;
-
- retval = read_exec(inode, elf_ex.e_phoff, (char *) elf_phdata,
- sizeof(struct elf_phdr) * elf_ex.e_phnum, 1);
-
- 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. */
- error = do_mmap(file,
- ELF_PAGESTART(elf_phdata->p_vaddr),
- (elf_phdata->p_filesz +
- ELF_PAGEOFFSET(elf_phdata->p_vaddr)),
- PROT_READ | PROT_WRITE | PROT_EXEC,
- MAP_FIXED | MAP_PRIVATE | MAP_DENYWRITE,
- (elf_phdata->p_offset -
- ELF_PAGEOFFSET(elf_phdata->p_vaddr)));
-
- k = elf_phdata->p_vaddr + elf_phdata->p_filesz;
- if (k > elf_bss) elf_bss = k;
-
- if (error != ELF_PAGESTART(elf_phdata->p_vaddr)) {
- kfree(elf_phdata);
- return error;
- }
-
- padzero(elf_bss);
-
- len = ELF_PAGESTART(elf_phdata->p_filesz + elf_phdata->p_vaddr+ ELF_EXEC_PAGESIZE - 1);
- bss = elf_phdata->p_memsz + elf_phdata->p_vaddr;
- if (bss > len)
- do_mmap(NULL, len, bss-len,
- PROT_READ|PROT_WRITE|PROT_EXEC,
- MAP_FIXED|MAP_PRIVATE, 0);
- kfree(elf_phdata);
- return 0;
-}
-
-static int load_elf32_library(int fd)
-{
- int retval;
-
- MOD_INC_USE_COUNT;
- retval = do_load_elf32_library(fd);
- MOD_DEC_USE_COUNT;
- return retval;
-}
-
-/*
- * Note that some platforms still use traditional core dumps and not
- * the ELF core dump. Each platform can select it as appropriate.
- */
-#ifdef USE_ELF_CORE_DUMP
-
-/*
- * 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 *addr, int nr)
-{
- return file->f_op->write(file->f_inode, file, addr, nr) == nr;
-}
-
-static int dump_seek(struct file *file, off_t off)
-{
- if (file->f_op->llseek) {
- if (file->f_op->llseek(file->f_inode, 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;
-}
-
-#define roundup(x, y) ((((x)+((y)-1))/(y))*(y))
-
-/* 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), 4);
- sz += roundup(en->datasz, 4);
-
- return sz;
-}
-
-/* #define DEBUG */
-
-#define DUMP_WRITE(addr, nr) \
- do { if (!dump_write(file, (addr), (nr))) return 0; } while(0)
-#define DUMP_SEEK(off) \
- do { if (!dump_seek(file, (off))) return 0; } while(0)
-
-static int writenote(struct memelfnote *men, struct file *file)
-{
- struct elf_note en;
-
- en.n_namesz = strlen(men->name);
- 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;
-}
-#undef DUMP_WRITE
-#undef DUMP_SEEK
-
-#define DUMP_WRITE(addr, nr) \
- if (!dump_write(&file, (addr), (nr))) \
- goto close_coredump;
-#define DUMP_SEEK(off) \
- if (!dump_seek(&file, (off))) \
- goto close_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 elf32_core_dump(long signr, struct pt_regs * regs)
-{
- int has_dumped = 0;
- struct file file;
- struct inode *inode;
- unsigned short fs;
- char corefile[6+sizeof(current->comm)];
- int segs;
- int i;
- size_t size;
- struct vm_area_struct *vma;
- struct elfhdr elf;
- off_t offset = 0, dataoff;
- int limit = current->rlim[RLIMIT_CORE].rlim_cur;
- int numnote = 4;
- struct memelfnote notes[4];
- struct elf_prstatus prstatus; /* NT_PRSTATUS */
- elf_fpregset_t fpu; /* NT_PRFPREG */
- struct elf_prpsinfo psinfo; /* NT_PRPSINFO */
-
- if (!current->dumpable || limit < PAGE_SIZE || current->mm->count != 1)
- return 0;
- current->dumpable = 0;
-
-#ifndef CONFIG_BINFMT_ELF32
- MOD_INC_USE_COUNT;
-#endif
-
- /* 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++;
- }
-#ifdef DEBUG
- printk("elf_core_dump: %d segs taking %d bytes\n", segs, size);
-#endif
-
- /* Set up header */
- memcpy(elf.e_ident, ELFMAG, SELFMAG);
- elf.e_ident[EI_CLASS] = ELF_CLASS;
- elf.e_ident[EI_DATA] = ELF_DATA;
- elf.e_ident[EI_VERSION] = EV_CURRENT;
- 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);
- memcpy(corefile,"core.",5);
-#if 0
- memcpy(corefile+5,current->comm,sizeof(current->comm));
-#else
- corefile[4] = '\0';
-#endif
- if (open_namei(corefile,O_CREAT | 2 | O_TRUNC,0600,&inode,NULL)) {
- inode = NULL;
- goto end_coredump;
- }
- if (!S_ISREG(inode->i_mode))
- goto end_coredump;
- if (!inode->i_op || !inode->i_op->default_file_ops)
- goto end_coredump;
- file.f_mode = 3;
- file.f_flags = 0;
- file.f_count = 1;
- file.f_inode = inode;
- file.f_pos = 0;
- file.f_reada = 0;
- file.f_op = inode->i_op->default_file_ops;
- if (file.f_op->open)
- if (file.f_op->open(inode,&file))
- goto end_coredump;
- if (!file.f_op->write)
- goto close_coredump;
- 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->signal;
- prstatus.pr_sighold = current->blocked;
- psinfo.pr_pid = prstatus.pr_pid = current->pid;
- psinfo.pr_ppid = prstatus.pr_ppid = current->p_pptr->pid;
- psinfo.pr_pgrp = prstatus.pr_pgrp = current->pgrp;
- psinfo.pr_sid = prstatus.pr_sid = current->session;
- prstatus.pr_utime.tv_sec = CT_TO_SECS(current->utime);
- prstatus.pr_utime.tv_usec = CT_TO_USECS(current->utime);
- prstatus.pr_stime.tv_sec = CT_TO_SECS(current->stime);
- prstatus.pr_stime.tv_usec = CT_TO_USECS(current->stime);
- prstatus.pr_cutime.tv_sec = CT_TO_SECS(current->cutime);
- prstatus.pr_cutime.tv_usec = CT_TO_USECS(current->cutime);
- prstatus.pr_cstime.tv_sec = CT_TO_SECS(current->cstime);
- prstatus.pr_cstime.tv_usec = CT_TO_USECS(current->cstime);
-
- /*
- * This transfers the registers from regs into the standard
- * coredump arrangement, whatever that is.
- */
-#ifdef ELF_CORE_COPY_REGS
- ELF_CORE_COPY_REGS(prstatus.pr_reg, regs)
-#else
- if (sizeof(elf_gregset_t) != sizeof(struct pt_regs))
- {
- printk("sizeof(elf_gregset_t) (%ld) != sizeof(struct pt_regs) (%ld)\n",
- sizeof(elf_gregset_t), sizeof(struct pt_regs));
- }
- else
- *(struct pt_regs *)&prstatus.pr_reg = *regs;
-#endif
-
- notes[1].name = "CORE";
- notes[1].type = NT_PRPSINFO;
- notes[1].datasz = sizeof(psinfo);
- notes[1].data = &psinfo;
- psinfo.pr_state = current->state;
- psinfo.pr_sname = (current->state < 0 || current->state > 5) ? '.' : "RSDZTD"[current->state];
- psinfo.pr_zomb = psinfo.pr_sname == 'Z';
- psinfo.pr_nice = current->priority-15;
- 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;
- copy_from_user(&psinfo.pr_psargs,
- (const char *)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);
- }
- strncpy(psinfo.pr_fname, current->comm, sizeof(psinfo.pr_fname));
-
- notes[2].name = "CORE";
- notes[2].type = NT_TASKSTRUCT;
- notes[2].datasz = sizeof(*current);
- notes[2].data = current;
-
- /* Try to dump the fpu. */
- prstatus.pr_fpvalid = dump_fpu (regs, &fpu);
- if (!prstatus.pr_fpvalid)
- {
- numnote--;
- }
- else
- {
- notes[3].name = "CORE";
- notes[3].type = NT_PRFPREG;
- notes[3].datasz = sizeof(fpu);
- notes[3].data = &fpu;
- }
-
- /* Write notes phdr entry */
- {
- struct elf_phdr phdr;
- int sz = 0;
-
- for(i = 0; i < numnote; i++)
- sz += notesize(¬es[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(¬es[i], &file))
- goto close_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;
-
- i++;
- if (!maydump(vma))
- continue;
-#ifdef DEBUG
- printk("elf_core_dump: writing %08lx %lx\n", addr, len);
-#endif
- DUMP_WRITE((void *)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);
- }
-
- close_coredump:
- if (file.f_op->release)
- file.f_op->release(inode,&file);
-
- end_coredump:
- set_fs(fs);
- iput(inode);
-#ifndef CONFIG_BINFMT_ELF32
- MOD_DEC_USE_COUNT;
-#endif
- return has_dumped;
-}
-#endif /* USE_ELF_CORE_DUMP */
-
-__initfunc(int init_elf32_binfmt(void))
-{
- return register_binfmt(&elf32_format);
-}
-
-#ifdef MODULE
-
-int init_module(void)
-{
- /* Install the COFF, ELF and XOUT loaders.
- * N.B. We *rely* on the table being the right size with the
- * right number of free slots...
- */
- return init_elf32_binfmt();
-}
-
-
-void cleanup_module( void)
-{
- /* Remove the COFF and ELF loaders. */
- unregister_binfmt(&elf32_format);
-}
-#endif
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen, slshen@lbl.gov