src/libexec/rtld-elf/Symbol.map, branch releng/12.4

MFC r361303, r361349, r361394, r361398, r361537:

2020-05-27T21:56:45Z

Change link_map::l_addr to mean load offset in ABI-compatible way. Add link_map::l_refname. Add rtld feature indicators.

Add rtld private interface for dso to detect dynamic loading

2015-01-03T18:09:53Z

vs. static linking. Tested by: pho, antoine (exp-run) Sponsored by: The FreeBSD Foundation MFC after: 1 week

- Export the function added in r265456 rather than the non-existent

2014-05-07T17:21:22Z

_rtld_debug_postinit(). [1] - Use __compiler_membar() instead of inline asm in _r_debug_state() and _r_debug_postinit(). [2] Pointy hat to: markj [1] Reported by: attilio [2] Discussed with: kib X-MFC-With: r265456

Add a postinit debugger hook to rtld. This will be used by dtrace(1) to halt

2014-05-06T18:07:58Z

the victim process before its entry point is called, at which point probes and DOF data are registered with the kernel. The r_debug_state hook cannot be used for this purpose, as it is called before the program's init routines are invoked and in particular before DOF data is registered (via drti.o). Reviewed by: kib MFC after: 2 weeks

Implement fdlopen(3), an rtld interface to load shared object by file

2012-01-07T10:33:01Z

descriptor. Requested and tested by: des (previous version) Reviewed by: des, kan (previous version) MFC after: 2 weeks

Remove a hack made obsolete by the binutils 2.17 merge.

2011-02-20T16:16:42Z

In rtld, read the initial stack access mode from AT_STACKPROT as set

2011-01-08T17:11:49Z

by kernel, and parse PT_GNU_STACK phdr from linked and loaded dsos. If the loaded dso requires executable stack, as specified by PF_X bit of p_flags of PT_GNU_STACK phdr, but current stack protection does not permit execution, the __pthread_map_stacks_exec symbol is looked up and called. It should be implemented in libc or threading library and change the protection mode of all thread stacks to be executable. Provide a private interface _rtld_get_stack_prot() to export the stack access mode as calculated by rtld. Reviewed by: kan

Introduce implementation-private rtld interface _rtld_addr_phdr, which

2010-08-23T15:27:03Z

fills struct dl_phdr_info for the shared object that contains the specified address, if any. Idea and reviewed by: kan MFC after: 3 weeks

RTLD support for powerpc64. A few small modifications to the Makefile

2010-07-10T17:43:24Z

and symbol map are required to support various consequences of the dot symbol scheme: - Symbols beginning with a dot are reserved, so start private symbols with an underscore. - In order to set RTLD breakpoints, gdb must be able to locate the text entry point, not the data section function descriptor, so add .r_debug_state to the symbol map on powerpc64. Obtained from: projects/ppc64

Allow the NULL, RTLD_SELF and RTLD_NEXT handles to work with dlfunc(3).

2009-04-03T19:17:23Z

dlfunc() called dlsym() to do the work, and dlsym() determines the dso that originating the call by the return address. Due to this, dlfunc() operated as if the caller is always the libc. To fix this, move the dlfunc() to rtld, where it can call the internal implementation of dlsym, and still correctly fetch return address. Provide usual weak stub for the symbol from libc for static binaries. dlfunc is put to FBSD_1.0 symver namespace in the ld.so export to override dlfunc@FBSD_1.0 weak symbol, exported by libc. Reported, analyzed and tested by: Tijl Coosemans PR: standards/133339 Reviewed by: kan