Rtld on diet 3.

Stop using strerror(3) in rtld, which brings in msgcat and stdio.
Directly access sys_errlist array of errno messages with private
rtld_strerror() function.

Now,
$ size /libexec/ld-elf.so.1
   text    data     bss     dec     hex filename
  96983    2480    8744  108207   1a6af /libexec/ld-elf.so.1

Reviewed by:	dim, kan
MFC after:	2 weeks

1 files changed, 6 insertions, 5 deletions

diff --git a/libexec/rtld-elf/map_object.c b/libexec/rtld-elf/map_object.c
index f142819..9f4a499 100644
--- a/libexec/rtld-elf/map_object.c
+++ b/libexec/rtld-elf/map_object.c
@@ -184,7 +184,7 @@ map_object(int fd, const char *path, const struct stat *sb)
       MAP_NOCORE, -1, 0);
     if (mapbase == (caddr_t) -1) {
 	_rtld_error("%s: mmap of entire address space failed: %s",
-	  path, strerror(errno));
+	  path, rtld_strerror(errno));
 	return NULL;
     }
     if (base_addr != NULL && mapbase != base_addr) {
@@ -204,7 +204,8 @@ map_object(int fd, const char *path, const struct stat *sb)
 	data_flags = convert_flags(segs[i]->p_flags) | MAP_FIXED;
 	if (mmap(data_addr, data_vlimit - data_vaddr, data_prot,
 	  data_flags, fd, data_offset) == (caddr_t) -1) {
-	    _rtld_error("%s: mmap of data failed: %s", path, strerror(errno));
+	    _rtld_error("%s: mmap of data failed: %s", path,
+		rtld_strerror(errno));
 	    return NULL;
 	}
 
@@ -221,7 +222,7 @@ map_object(int fd, const char *path, const struct stat *sb)
 		if ((data_prot & PROT_WRITE) == 0 && -1 ==
 		     mprotect(clear_page, PAGE_SIZE, data_prot|PROT_WRITE)) {
 			_rtld_error("%s: mprotect failed: %s", path,
-			    strerror(errno));
+			    rtld_strerror(errno));
 			return NULL;
 		}
 
@@ -240,7 +241,7 @@ map_object(int fd, const char *path, const struct stat *sb)
 		if (mmap(bss_addr, bss_vlimit - bss_vaddr, data_prot,
 		    data_flags | MAP_ANON, -1, 0) == (caddr_t)-1) {
 		    _rtld_error("%s: mmap of bss failed: %s", path,
-			strerror(errno));
+			rtld_strerror(errno));
 		    return NULL;
 		}
 	    }
@@ -307,7 +308,7 @@ get_elf_header (int fd, const char *path)
     ssize_t nbytes;
 
     if ((nbytes = pread(fd, u.buf, PAGE_SIZE, 0)) == -1) {
-	_rtld_error("%s: read error: %s", path, strerror(errno));
+	_rtld_error("%s: read error: %s", path, rtld_strerror(errno));
 	return NULL;
     }