freebsd-dev/libexec/rtld-elf/Symbol.map

/*
 * $FreeBSD$
 */

FBSD_1.0 {
    _rtld_error;
    dlclose;
    dlerror;
    dlopen;
    dlsym;
    dlfunc;
    dlvsym;
    dladdr;
    dllockinit;
    dlinfo;
    dl_iterate_phdr;
    r_debug_state;
    __tls_get_addr;
};

FBSD_1.3 {
    fdlopen;
};

FBSDprivate_1.0 {
    _rtld_thread_init;
    _rtld_allocate_tls;
    _rtld_free_tls;
    _rtld_atfork_pre;
    _rtld_atfork_post;
    _rtld_addr_phdr;
    _rtld_get_stack_prot;
    _r_debug_postinit;
};
Use C comments since we now preprocess these files with CPP. 2007-04-29 14:05:22 +00:00			`/*`
			`* $FreeBSD$`
			`*/`
Prepare rtld for symbol versioning. Disable it by default for now. 2007-04-03 19:01:06 +00:00
			`FBSD_1.0 {`
			`_rtld_error;`
			`dlclose;`
			`dlerror;`
			`dlopen;`
			`dlsym;`
Allow the NULL, RTLD_SELF and RTLD_NEXT handles to work with dlfunc(3). 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 <tijl ulyssis org> PR: standards/133339 Reviewed by: kan 2009-04-03 19:17:23 +00:00			`dlfunc;`
Prepare rtld for symbol versioning. Disable it by default for now. 2007-04-03 19:01:06 +00:00			`dlvsym;`
			`dladdr;`
			`dllockinit;`
			`dlinfo;`
			`dl_iterate_phdr;`
Add r_debug_state to the list of symbols exported from rtld. GDB needs to be able to find it in order to trap shared library events from rtld. Approved by: re (rwatson) 2007-07-11 23:07:37 +00:00			`r_debug_state;`
Bring rtld exports in line with corresponding symbols exported from libc. Disable SYMVER_DEFAULT n rtld until its implications are understood better. 2007-04-09 23:00:29 +00:00			`__tls_get_addr;`
			`};`

Implement fdlopen(3), an rtld interface to load shared object by file descriptor. Requested and tested by: des (previous version) Reviewed by: des, kan (previous version) MFC after: 2 weeks 2012-01-07 10:33:01 +00:00			`FBSD_1.3 {`
			`fdlopen;`
			`};`

Catch up with the private namespace change (s/FBSDprivate/FBSDprivate_1.0). 2007-05-01 13:46:27 +00:00			`FBSDprivate_1.0 {`
Prepare rtld for symbol versioning. Disable it by default for now. 2007-04-03 19:01:06 +00:00			`_rtld_thread_init;`
			`_rtld_allocate_tls;`
			`_rtld_free_tls;`
Add two rtld exported symbols, _rtld_atfork_pre and _rtld_atfork_post. Threading library calls _pre before the fork, allowing the rtld to lock itself to ensure that other threads of the process are out of dynamic linker. _post releases the locks. This allows the rtld to have consistent state in the child. Although child may legitimately call only async-safe functions, the call may need plt relocation resolution, and this requires working rtld. Reported and debugging help by: rink Reviewed by: kan, davidxu MFC after: 1 month (anyway, not before 7.1 is out) 2008-11-27 11:27:59 +00:00			`_rtld_atfork_pre;`
			`_rtld_atfork_post;`
Introduce implementation-private rtld interface _rtld_addr_phdr, which 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 2010-08-23 15:27:03 +00:00			`_rtld_addr_phdr;`
In rtld, read the initial stack access mode from AT_STACKPROT as set 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 2011-01-08 17:11:49 +00:00			`_rtld_get_stack_prot;`
- Export the function added in r265456 rather than the non-existent _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 2014-05-07 17:21:22 +00:00			`_r_debug_postinit;`
Prepare rtld for symbol versioning. Disable it by default for now. 2007-04-03 19:01:06 +00:00			`};`