src/libexec/rtld-elf/rtld_printf.c, branch releng/13.5

rtld snprintf: do not erronously skip a char at the buffer boundary

2024-05-03T00:26:26Z

(cherry picked from commit 56ee5fc43c40479e2651b21862e299bcf73017ae)

Remove $FreeBSD$: two-line .h pattern

2023-08-23T17:43:21Z

Remove /^\s*\*\n \*\s+\$FreeBSD\$$\n/ Similar commit in main: (cherry picked from commit b3e7694832e8)

rtld: add rtld_fdprintfx()

2021-11-19T04:25:27Z

(cherry picked from commit 77c088ab2109a376b71decce80e89d4f20ef8223)

Reduce size of rtld by 22% by pulling in less code from libc

2019-06-30T11:49:58Z

Currently RTLD is linked against libc_nossp_pic which means that any libc symbol used in rtld can pull in a lot of depedencies. This was causing symbol such as __libc_interposing and all the pthread stubs to be included in RTLD even though they are not required. It turns out most of these dependencies can easily be avoided by providing overrides inside of rtld. This change is motivated by CHERI, where we have an experimental ABI that requires additional relocation processing to allow the use of function pointers inside of rtld. Instead of adding this self-relocation code to RTLD I attempted to remove most function pointers from RTLD and discovered that most of them came from the libc dependencies instead of being actually used inside rtld. A nice side-effect of this change is that rtld is now 22% smaller on amd64. text data bss dec hex filename 0x21eb6 0xce0 0xe60 145910 239f6 /home/alr48/ld-elf-x86.before.so.1 0x1a6ed 0x728 0xdd8 113645 1bbed /home/alr48/ld-elf-x86.after.so.1 The number of R_X86_64_RELATIVE relocations that need to be processed on startup has also gone down from 368 to 187 (almost 50% less). Reviewed By: kib Differential Revision: https://reviews.freebsd.org/D20663

rtld-elf: fix more warnings to allow compiling with WARNS=6

2018-10-29T21:08:28Z

Reviewed By: kib Approved By: brooks (mentor) Differential Revision: https://reviews.freebsd.org/D17154

General further adoption of SPDX licensing ID tags.

2017-11-20T19:49:47Z

Mainly focus on files that use BSD 3-Clause license. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. Special thanks to Wind River for providing access to "The Duke of Highlander" tool: an older (2014) run over FreeBSD tree was useful as a starting point.

Renumber copyright clause 4

2017-02-28T23:42:47Z

Renumber cluase 4 to 3, per what everybody else did when BSD granted them permission to remove clause 3. My insistance on keeping the same numbering for legal reasons is too pedantic, so give up on that point. Submitted by: Jan Schaumann Pull Request: https://github.com/freebsd/freebsd/pull/96

Add the LD_LIBRARY_PATH_FDS environmental variable.

2014-06-20T17:08:32Z

This variable allows the loading of shared libraries via directory descriptors rather than via library paths. If LD_LIBRARY_PATH_FDS=3:4:12, the directories represented by file descriptors 3, 4 and 12 will searched for shared libraries before the normal path-based mechanisms are used. This allows us to execute unprivileged binaries from within a Capsicum sandbox even if they require shared libraries. Approved by: rwatson (mentor) Reviewed by: kib MFC after: 3 weeks Sponsored by: DARPA/AFRL

Remove the use of toupper() from rtld_printf.c. Use of the libc function

2012-03-09T16:21:40Z

relies on working TLS, which is particulary not true for LD_DEBUG uses. MFC after: 1 week

Do not use the function pointers for the internal operation of rtld_printf()

2011-09-06T10:21:33Z

functions. The _rtld_error() function might be called early during the rtld bootstrap, in which case function pointers are not yet functional on ia64 due to required relocations not yet performed. Reported, reviewed and tested by: marcel Approved by: re (bz)