src/libexec/rtld-elf/libmap.c, branch releng/10.2

MFC r270256:

2014-08-28T18:11:05Z

Always check the limits of array index variables before using them. Obtained from: DragonFlyBSD

MFC r266411:

2014-05-25T00:57:07Z

Fix LD_LIBMAP.

Make the directory mapping functionality, which was previously only

2013-09-21T21:03:52Z

available in 32-bit compatibility mode, unconditional. Overhaul the man page, which had evolved more by accretion than by design. Approved by: re (gjb) MFC after: 3 weeks

rtld: Fix fd leak with parallel dlopen and fork/exec.

2012-11-04T21:42:24Z

Rtld did not set FD_CLOEXEC on its internal file descriptors; therefore, such a file descriptor may be passed to a process created by another thread running in parallel to dlopen() or fdlopen(). No other threads are expected to be running during parsing of the hints and libmap files but the file descriptors need not be passed to child processes so add O_CLOEXEC there as well. This change will break fdlopen() (as used by OpenPAM) on kernels without F_DUPFD_CLOEXEC (added in July). Note that running new userland on old kernels is not supported. Reviewed by: kib

open the resolved path

2012-05-05T16:37:14Z

fix debug message Submitted by: John Marino Approved by: des (mentor)

Add two special directives to libmap.conf:

2012-04-30T21:26:35Z

include : Parse the contents of file before continuing with the current file. includedir : Parse the contents of every file in dir that ends in .conf before continuing with the current file. Any file or directory encountered while processing include or includedir directives will be parsed exactly once, even if it is encountered multiple times. Reviewed by: kib, des Approved by: des (mentor) MFC after: 1 month

Rtld on diet 3.

2012-03-14T15:39:59Z

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

Rtld on diet part 2:

2012-03-12T12:16:08Z

Do not use stdio for libmap.conf read. Directly map the file and parse lines from the mappings. Reviewed by: kan MFC after: 3 weeks

Cosmetic nit:

2012-03-06T09:34:30Z

- rename isspace1() macro to the more appropriate rtld_isspace(). Discussed with: kib

The libmap.conf initialization is performed before TLS is functional.

2012-03-05T20:43:06Z

Since after r232498 the ctype macros require working access to thread-local variables, rtld crashes when libmap.conf is present. Use hand-made isspace1() macro which is enough to detect spaces in libmap.conf. Reported by: alc, lme, many on current@ Tested by: lme Reviewed by: dim, kan MFC after: 1 week