src/libexec/rtld-elf, branch release/9.0.0

MFC r227660:

2011-11-26T08:22:11Z

Fix fd leak. Approved by: re (bz)

MFC r226156:

2011-10-10T14:48:18Z

Handle the R_386_TLS_TPOFF32 relocation. Approved by: re (bz)

MFC r226155:

2011-10-10T14:46:40Z

Setting up TLS block for the main thread must be done after the relocations are processed. Approved by: re (bz)

Restore the writing of the .bss sections of the dsos (not the main

2011-09-20T21:49:54Z

executable) after r190885. The whole region for the dso is mmaped with MAP_NOCORE flag, doing only mprotect(2) over .bss prevented it from writing .bss to core files. Revert the optimization of using mprotect(2) to establish .bss, overlap the section with mmap(2). Reported by: attilio Reviewed by: attilio, emaste Approved by: re (bz) MFC after: 2 weeks

Use the proper dynamic tls block to calculate the tls variable address

2011-09-15T11:50:09Z

in case tls data generation was updated. PR: misc/160721 Submitted by: "Thinker K.F. Li" Tested by: flo Approved by: re (bz) 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)

When libexec/rtld-elf/rtld.c is compiled with clang, the r_debug_state()

2011-09-03T11:41:00Z

function (a hook necessary for gdb support), is inlined, but since the function contains no code, no calls to it are generated. When gdb is debugging a dynamically linked program, this causes backtraces to be corrupted. Fix it by marking the function __noinline, and inserting an empty asm statement, that pretends to clobber memory. This forces the compiler to emit calls to r_debug_state() throughout rtld.c. Approved by: re (kib)

Rtld links with the specially built pic static libc library to get some

2011-08-24T20:05:13Z

C runtime services, like printf(). Unfortunately, the multithread-safeness measures in the libc do not work in rtld environment. Rip the kernel printf() implementation and use it in the rtld instead of libc version. This printf does not require any shared global data and thus is mt-safe. Systematically use rtld_printf() and related functions, remove the calls to err(3). Note that stdio is still pulled from libc due to libmap implementaion using fopen(). This is safe but unoptimal, and can be changed later. Reported and tested by: pgj Diagnosed and reviewed by: kan (previous version) Approved by: re (bz)

Fix clang warnings.

2011-06-18T13:56:33Z

Approved by: philip (mentor)

Compile RTLD with global dot symbols on 64-bit PowerPC, as a crutch for

2011-06-08T13:23:35Z

GDB's ability to locate r_debug_state (which is actually the only function that need be compiled this way).