svn commit: r355919 - stable/12/libexec/rtld-elf

[Konstantin Belousov]

Author: kib
Date: Fri Dec 20 01:00:18 2019
New Revision: 355919
URL: https://svnweb.freebsd.org/changeset/base/355919

Log:
  MFC r355676:
  rtld: make checks for mmap(2) failures compliant with documentation.

Modified:
  stable/12/libexec/rtld-elf/map_object.c
Directory Properties:
  stable/12/   (props changed)

Modified: stable/12/libexec/rtld-elf/map_object.c
==============================================================================
--- stable/12/libexec/rtld-elf/map_object.c	Fri Dec 20 00:25:56 2019	(r355918)
+++ stable/12/libexec/rtld-elf/map_object.c	Fri Dec 20 01:00:18 2019	(r355919)
@@ -203,7 +203,7 @@ map_object(int fd, const char *path, const struct stat
 	base_flags |= MAP_FIXED | MAP_EXCL;
 
     mapbase = mmap(base_addr, mapsize, PROT_NONE, base_flags, -1, 0);
-    if (mapbase == (caddr_t) -1) {
+    if (mapbase == MAP_FAILED) {
 	_rtld_error("%s: mmap of entire address space failed: %s",
 	  path, rtld_strerror(errno));
 	goto error;
@@ -259,7 +259,7 @@ map_object(int fd, const char *path, const struct stat
 	    bss_addr = mapbase +  (bss_vaddr - base_vaddr);
 	    if (bss_vlimit > bss_vaddr) {	/* There is something to do */
 		if (mmap(bss_addr, bss_vlimit - bss_vaddr, data_prot,
-		    data_flags | MAP_ANON, -1, 0) == (caddr_t)-1) {
+		    data_flags | MAP_ANON, -1, 0) == MAP_FAILED) {
 		    _rtld_error("%s: mmap of bss failed: %s", path,
 			rtld_strerror(errno));
 		    goto error1;
@@ -343,7 +343,7 @@ get_elf_header(int fd, const char *path, const struct 
 
 	hdr = mmap(NULL, PAGE_SIZE, PROT_READ, MAP_PRIVATE | MAP_PREFAULT_READ,
 	    fd, 0);
-	if (hdr == (Elf_Ehdr *)MAP_FAILED) {
+	if (hdr == MAP_FAILED) {
 		_rtld_error("%s: read error: %s", path, rtld_strerror(errno));
 		return (NULL);
 	}