X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=fs%2Fbinfmt_elf.c;h=80ca932ba0bddaaf2d5a520d5fe408c14af508db;hb=b79cb6531d5ba9174f9677ce2213c017d1e2ef19;hp=6fa6adc409726e8b79038bbdac31e510e248fed7;hpb=4fd5f8267dd37aaebadfabe71d9c808821eea05a;p=powerpc.git

diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index 6fa6adc409..80ca932ba0 100644
--- 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);
 }
@@ -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