spelling: s/trough/through/

[safe/jmp/linux-2.6] / fs / binfmt_elf.c

diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index f8f6b6b..80ca932 100644 (file)
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -58,7 +58,7 @@ extern int dump_fpu (struct pt_regs *, elf_fpregset_t *);
  * If we don't support core dumping, then supply a NULL so we
  * don't even try.
  */
-#ifdef USE_ELF_CORE_DUMP
+#if defined(USE_ELF_CORE_DUMP) && defined(CONFIG_ELF_CORE)
 static int elf_core_dump(long signr, struct pt_regs * regs, struct file * file);
 #else
 #define elf_core_dump  NULL
@@ -288,11 +288,17 @@ static unsigned long elf_map(struct file *filep, unsigned long addr,
                        struct elf_phdr *eppnt, int prot, int type)
 {
        unsigned long map_addr;
+       unsigned long pageoffset = ELF_PAGEOFFSET(eppnt->p_vaddr);
 
        down_write(&current->mm->mmap_sem);
-       map_addr = do_mmap(filep, ELF_PAGESTART(addr),
-                          eppnt->p_filesz + ELF_PAGEOFFSET(eppnt->p_vaddr), prot, type,
-                          eppnt->p_offset - ELF_PAGEOFFSET(eppnt->p_vaddr));
+       /* mmap() will return -EINVAL if given a zero size, but a
+        * segment with zero filesize is perfectly valid */
+       if (eppnt->p_filesz + pageoffset)
+               map_addr = do_mmap(filep, ELF_PAGESTART(addr),
+                                  eppnt->p_filesz + pageoffset, prot, type,
+                                  eppnt->p_offset - pageoffset);
+       else
+               map_addr = ELF_PAGESTART(addr);
        up_write(&current->mm->mmap_sem);
        return(map_addr);
 }
@@ -773,8 +779,8 @@ static int load_elf_binary(struct linux_binprm * bprm, struct pt_regs * regs)
 
        /* Do this so that we can load the interpreter, if need be.  We will
           change some of these later */
-       set_mm_counter(current->mm, rss, 0);
        current->mm->free_area_cache = current->mm->mmap_base;
+       current->mm->cached_hole_size = 0;
        retval = setup_arg_pages(bprm, randomize_stack_top(STACK_TOP),
                                 executable_stack);
        if (retval < 0) {
@@ -904,7 +910,7 @@ static int load_elf_binary(struct linux_binprm * bprm, struct pt_regs * regs)
                send_sig(SIGKILL, current, 0);
                goto out_free_dentry;
        }
-       if (padzero(elf_bss)) {
+       if (likely(elf_bss != elf_brk) && unlikely(padzero(elf_bss))) {
                send_sig(SIGSEGV, current, 0);
                retval = -EFAULT; /* Nobody gets to see this, but.. */
                goto out_free_dentry;
@@ -1006,8 +1012,7 @@ out_free_dentry:
        if (interpreter)
                fput(interpreter);
 out_free_interp:
-       if (elf_interpreter)
-               kfree(elf_interpreter);
+       kfree(elf_interpreter);
 out_free_file:
        sys_close(elf_exec_fileno);
 out_free_fh:
@@ -1108,7 +1113,7 @@ out:
  * 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
+#if defined(USE_ELF_CORE_DUMP) && defined(CONFIG_ELF_CORE)
 
 /*
  * ELF core dumper
@@ -1502,9 +1507,7 @@ static int elf_core_dump(long signr, struct pt_regs * regs, struct file * file)
        fill_psinfo(psinfo, current->group_leader, current->mm);
        fill_note(notes +1, "CORE", NT_PRPSINFO, sizeof(*psinfo), psinfo);
        
-       fill_note(notes +2, "CORE", NT_TASKSTRUCT, sizeof(*current), current);
-  
-       numnote = 3;
+       numnote = 2;
 
        auxv = (elf_addr_t *) current->mm->saved_auxv;