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Add thr_pread_{int,long,ptr} and thr_pwrite_{int,long,ptr} to

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help abstract the sizes and endianness of the primary types of
the target.  These currently use the native characteristics.
This commit is contained in:
Marcel Moolenaar 2008-07-31 20:25:52 +00:00
parent d84f6378b9
commit 8d4e4b790a
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=181065
2 changed files with 179 additions and 0 deletions
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169
lib/libthread_db/thread_db.c
View File

@ -32,6 +32,8 @@ __FBSDID("$FreeBSD$");
#include <thread_db.h>
#include <unistd.h>
#include <sys/cdefs.h>
#include <sys/endian.h>
#include <sys/errno.h>
#include <sys/linker_set.h>
#include "thread_db_int.h"
@ -257,3 +259,170 @@ td_thr_sstep(const td_thrhandle_t *th, int step)
const td_thragent_t *ta = th->th_ta;
return (ta->ta_ops->to_thr_sstep(th, step));
}
/*
* Support functions for reading from and writing to the target
* address space.
*/
static int
thr_pread(struct ps_prochandle *ph, psaddr_t addr, uint64_t *val,
u_int size, u_int byteorder)
{
uint8_t buf[sizeof(*val)];
ps_err_e err;
if (size > sizeof(buf))
return (EOVERFLOW);
err = ps_pread(ph, addr, buf, size);
if (err != PS_OK)
return (EFAULT);
switch (byteorder) {
case BIG_ENDIAN:
switch (size) {
case 1:
*val = buf[0];
break;
case 2:
*val = be16dec(buf);
break;
case 4:
*val = be32dec(buf);
break;
case 8:
*val = be64dec(buf);
break;
default:
return (EINVAL);
}
break;
case LITTLE_ENDIAN:
switch (size) {
case 1:
*val = buf[0];
break;
case 2:
*val = le16dec(buf);
break;
case 4:
*val = le32dec(buf);
break;
case 8:
*val = le64dec(buf);
break;
default:
return (EINVAL);
}
break;
default:
return (EINVAL);
}
return (0);
}
int
thr_pread_int(struct td_thragent *ta, psaddr_t addr, uint32_t *val)
{
uint64_t tmp;
int error;
error = thr_pread(ta->ph, addr, &tmp, sizeof(int), BYTE_ORDER);
if (!error)
*val = tmp;
return (error);
}
int
thr_pread_long(struct td_thragent *ta, psaddr_t addr, uint64_t *val)
{
return (thr_pread(ta->ph, addr, val, sizeof(long), BYTE_ORDER));
}
int
thr_pread_ptr(struct td_thragent *ta, psaddr_t addr, uint64_t *val)
{
return (thr_pread(ta->ph, addr, val, sizeof(void *), BYTE_ORDER));
}
static int
thr_pwrite(struct ps_prochandle *ph, psaddr_t addr, uint64_t val,
u_int size, u_int byteorder)
{
uint8_t buf[sizeof(val)];
ps_err_e err;
if (size > sizeof(buf))
return (EOVERFLOW);
switch (byteorder) {
case BIG_ENDIAN:
switch (size) {
case 1:
buf[0] = (uint8_t)val;
break;
case 2:
be16enc(buf, (uint16_t)val);
break;
case 4:
be32enc(buf, (uint32_t)val);
break;
case 8:
be64enc(buf, (uint64_t)val);
break;
default:
return (EINVAL);
}
break;
case LITTLE_ENDIAN:
switch (size) {
case 1:
buf[0] = (uint8_t)val;
break;
case 2:
le16enc(buf, (uint16_t)val);
break;
case 4:
le32enc(buf, (uint32_t)val);
break;
case 8:
le64enc(buf, (uint64_t)val);
break;
default:
return (EINVAL);
}
break;
default:
return (EINVAL);
}
err = ps_pwrite(ph, addr, buf, size);
return ((err != PS_OK) ? EFAULT : 0);
}
int
thr_pwrite_int(struct td_thragent *ta, psaddr_t addr, uint32_t val)
{
return (thr_pwrite(ta->ph, addr, val, sizeof(int), BYTE_ORDER));
}
int
thr_pwrite_long(struct td_thragent *ta, psaddr_t addr, uint64_t val)
{
return (thr_pwrite(ta->ph, addr, val, sizeof(long), BYTE_ORDER));
}
int
thr_pwrite_ptr(struct td_thragent *ta, psaddr_t addr, uint64_t val)
{
return (thr_pwrite(ta->ph, addr, val, sizeof(void *), BYTE_ORDER));
}

10
lib/libthread_db/thread_db_int.h
View File

@ -93,4 +93,14 @@ struct ta_ops {
#define TDBG_FUNC()
#endif
struct td_thragent;
int thr_pread_int(struct td_thragent *, psaddr_t, uint32_t *);
int thr_pread_long(struct td_thragent *, psaddr_t, uint64_t *);
int thr_pread_ptr(struct td_thragent *, psaddr_t, uint64_t *);
int thr_pwrite_int(struct td_thragent *, psaddr_t, uint32_t);
int thr_pwrite_long(struct td_thragent *, psaddr_t, uint64_t);
int thr_pwrite_ptr(struct td_thragent *, psaddr_t, uint64_t);
#endif /* _THREAD_DB_INT_H_ */