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Handle the different event types properly in rd_event_addr(). In particular,

Browse source 
with r265456 _r_debug_postinit can be used for RD_POSTINIT events. rtld(1)
uses r_debug_state for dl state transitions, so we use its address for
RD_DLACTIVITY events.

MFC after:	2 weeks
This commit is contained in:
Mark Johnston 2014-05-08 03:26:25 +00:00
parent 09df65e474
commit b252f278ea
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=265629
2 changed files with 38 additions and 8 deletions
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42
lib/librtld_db/rtld_db.c
View file

@ -81,20 +81,40 @@ rd_errstr(rd_err_e rderr)
}
rd_err_e
rd_event_addr(rd_agent_t *rdap, rd_event_e event __unused, rd_notify_t *notify)
rd_event_addr(rd_agent_t *rdap, rd_event_e event, rd_notify_t *notify)
{
DPRINTF("%s rdap %p notify %p\n", __func__, rdap, notify);
rd_err_e ret;
notify->type = RD_NOTIFY_BPT;
notify->u.bptaddr = rdap->rda_addr;
DPRINTF("%s rdap %p event %d notify %p\n", __func__, rdap, event,
notify);
return (RD_OK);
ret = RD_OK;
switch (event) {
case RD_NONE:
break;
case RD_PREINIT:
notify->type = RD_NOTIFY_BPT;
notify->u.bptaddr = rdap->rda_preinit_addr;
break;
case RD_POSTINIT:
notify->type = RD_NOTIFY_BPT;
notify->u.bptaddr = rdap->rda_postinit_addr;
break;
case RD_DLACTIVITY:
notify->type = RD_NOTIFY_BPT;
notify->u.bptaddr = rdap->rda_dlactivity_addr;
break;
default:
ret = RD_ERR;
break;
}
return (ret);
}
rd_err_e
rd_event_enable(rd_agent_t *rdap __unused, int onoff)
{
DPRINTF("%s onoff %d\n", __func__, onoff);
DPRINTF("%s onoff %d\n", __func__, onoff);
return (RD_OK);
}
@ -220,7 +240,15 @@ rd_reset(rd_agent_t *rdap)
&sym) < 0)
return (RD_ERR);
DPRINTF("found r_debug_state at 0x%lx\n", (unsigned long)sym.st_value);
rdap->rda_addr = sym.st_value;
rdap->rda_preinit_addr = sym.st_value;
rdap->rda_dlactivity_addr = sym.st_value;
if (proc_name2sym(rdap->rda_php, "ld-elf.so.1", "_r_debug_postinit",
&sym) < 0)
return (RD_ERR);
DPRINTF("found _r_debug_postinit at 0x%lx\n",
(unsigned long)sym.st_value);
rdap->rda_postinit_addr = sym.st_value;
return (RD_OK);
}

4
lib/librtld_db/rtld_db.h
View file

@ -51,7 +51,9 @@ typedef enum {
typedef struct rd_agent {
struct proc_handle *rda_php;
uintptr_t rda_addr; /* address of r_debug_state */
uintptr_t rda_dlactivity_addr;
uintptr_t rda_preinit_addr;
uintptr_t rda_postinit_addr;
} rd_agent_t;
typedef struct rd_loadobj {