LIBRTLD_DB(3) | FreeBSD Library Functions Manual | LIBRTLD_DB(3) |
NAME
librtld_db — library for run-time linker debuggingLIBRARY
library “librtld_db”SYNOPSIS
#include < rtld_db.h> void
rd_delete( rd_agent_t *rdap);
char *
rd_errstr( rd_err_e rderr);
rd_err_e
rd_event_addr( rd_agent_t *rdap, rd_event_e event, rd_notify_t *notify);
rd_err_e
rd_event_enable( rd_agent_t *rdap, int onoff);
rd_err_e
rd_event_getmsg( rd_agent_t *rdap, rd_event_msg_t *msg);
rd_err_e
rd_init( int version);
typedef int
rl_iter_f( const rd_loadobj_t *, void *);
rd_err_e
rd_loadobj_iter( rd_agent_t *rdap, rl_iter_f *cb, void *clnt_data);
void
rd_log( const int onoff);
rd_agent_t *
rd_new( struct proc_handle *php);
rd_err_e
rd_objpad_enable( rd_agent_t *rdap, size_t padsize);
rd_err_e
rd_plt_resolution( rd_agent_t *rdap, uintptr_t pc, struct proc *proc, uintptr_t plt_base, rd_plt_info_t *rpi);
rd_err_e
rd_reset( rd_agent_t *rdap);
DESCRIPTION
The librtld_db library provides a debugging interface to the run-time linker (rtld). This library must be used along with libproc(3).Most library functions take a rd_agent_t argument. This argument is an opaque structure containing information associated with the current status of the agent.
Before you start using librtld_db you should call rd_init() with the RD_VERSION argument. This initializes the library to the correct version your program was compiled with and provides proper ABI stability.
What follows is a description of what each function.
rd_new() creates a new librtld_db agent. The php argument should be the proc_handle you received from libproc(3).
rd_reset() resets your previously created agent.
rd_delete() deallocates the resources associated with the agent.
rd_errstr() returns an error string describing the error present in rderr.
rd_event_enable() enables reporting of events. This function always returns RD_OK.
rd_event_addr() returns the event address corresponding to the event parameter. At the moment we only report events of type RD_NOTIFY_BPT.
rd_event_getmsg() returns the message associated with the latest event. At the moment only RD_POSTINIT events are supported.
rd_loadobj_iter() allows you to iterate over the program's loaded objects. cb is a callback of type rl_iter_f().
RETURN VALUES
Most functions return an rd_err_e type error. The error codes are described in the header file for this library. You can get the error string using rd_errstr().HISTORY
The librtld_db library first appeared in FreeBSD 9.0 and was modeled after the same library present in the Solaris operating system.AUTHORS
The librtld_db library and this manual page were written by <rpaulo@FreeBSD.org> under sponsorship from the FreeBSD Foundation.CAVEATS
The functions rd_event_enable(), rd_log(), rd_objpad_enable() and rd_plt_resolution() are not yet implemented.June 10, 2010 | FreeBSD |