Add thr_pread_{int,long,ptr} and thr_pwrite_{int,long,ptr} to
help abstract the sizes and endianness of the primary types of the target. These currently use the native characteristics.
This commit is contained in:
parent
d84f6378b9
commit
8d4e4b790a
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=181065
@ -32,6 +32,8 @@ __FBSDID("$FreeBSD$");
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#include <thread_db.h>
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#include <unistd.h>
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#include <sys/cdefs.h>
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#include <sys/endian.h>
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#include <sys/errno.h>
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#include <sys/linker_set.h>
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#include "thread_db_int.h"
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@ -257,3 +259,170 @@ td_thr_sstep(const td_thrhandle_t *th, int step)
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const td_thragent_t *ta = th->th_ta;
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return (ta->ta_ops->to_thr_sstep(th, step));
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}
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/*
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* Support functions for reading from and writing to the target
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* address space.
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*/
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static int
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thr_pread(struct ps_prochandle *ph, psaddr_t addr, uint64_t *val,
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u_int size, u_int byteorder)
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{
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uint8_t buf[sizeof(*val)];
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ps_err_e err;
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if (size > sizeof(buf))
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return (EOVERFLOW);
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err = ps_pread(ph, addr, buf, size);
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if (err != PS_OK)
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return (EFAULT);
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switch (byteorder) {
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case BIG_ENDIAN:
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switch (size) {
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case 1:
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*val = buf[0];
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break;
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case 2:
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*val = be16dec(buf);
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break;
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case 4:
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*val = be32dec(buf);
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break;
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case 8:
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*val = be64dec(buf);
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break;
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default:
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return (EINVAL);
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}
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break;
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case LITTLE_ENDIAN:
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switch (size) {
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case 1:
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*val = buf[0];
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break;
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case 2:
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*val = le16dec(buf);
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break;
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case 4:
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*val = le32dec(buf);
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break;
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case 8:
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*val = le64dec(buf);
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break;
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default:
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return (EINVAL);
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}
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break;
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default:
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return (EINVAL);
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}
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return (0);
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}
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int
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thr_pread_int(struct td_thragent *ta, psaddr_t addr, uint32_t *val)
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{
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uint64_t tmp;
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int error;
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error = thr_pread(ta->ph, addr, &tmp, sizeof(int), BYTE_ORDER);
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if (!error)
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*val = tmp;
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return (error);
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}
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int
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thr_pread_long(struct td_thragent *ta, psaddr_t addr, uint64_t *val)
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{
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return (thr_pread(ta->ph, addr, val, sizeof(long), BYTE_ORDER));
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}
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int
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thr_pread_ptr(struct td_thragent *ta, psaddr_t addr, uint64_t *val)
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{
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return (thr_pread(ta->ph, addr, val, sizeof(void *), BYTE_ORDER));
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}
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static int
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thr_pwrite(struct ps_prochandle *ph, psaddr_t addr, uint64_t val,
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u_int size, u_int byteorder)
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{
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uint8_t buf[sizeof(val)];
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ps_err_e err;
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if (size > sizeof(buf))
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return (EOVERFLOW);
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switch (byteorder) {
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case BIG_ENDIAN:
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switch (size) {
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case 1:
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buf[0] = (uint8_t)val;
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break;
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case 2:
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be16enc(buf, (uint16_t)val);
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break;
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case 4:
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be32enc(buf, (uint32_t)val);
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break;
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case 8:
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be64enc(buf, (uint64_t)val);
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break;
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default:
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return (EINVAL);
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}
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break;
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case LITTLE_ENDIAN:
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switch (size) {
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case 1:
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buf[0] = (uint8_t)val;
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break;
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case 2:
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le16enc(buf, (uint16_t)val);
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break;
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case 4:
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le32enc(buf, (uint32_t)val);
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break;
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case 8:
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le64enc(buf, (uint64_t)val);
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break;
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default:
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return (EINVAL);
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}
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break;
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default:
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return (EINVAL);
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}
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err = ps_pwrite(ph, addr, buf, size);
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return ((err != PS_OK) ? EFAULT : 0);
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}
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int
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thr_pwrite_int(struct td_thragent *ta, psaddr_t addr, uint32_t val)
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{
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return (thr_pwrite(ta->ph, addr, val, sizeof(int), BYTE_ORDER));
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}
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int
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thr_pwrite_long(struct td_thragent *ta, psaddr_t addr, uint64_t val)
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{
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return (thr_pwrite(ta->ph, addr, val, sizeof(long), BYTE_ORDER));
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}
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int
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thr_pwrite_ptr(struct td_thragent *ta, psaddr_t addr, uint64_t val)
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{
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return (thr_pwrite(ta->ph, addr, val, sizeof(void *), BYTE_ORDER));
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}
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@ -93,4 +93,14 @@ struct ta_ops {
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#define TDBG_FUNC()
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#endif
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struct td_thragent;
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int thr_pread_int(struct td_thragent *, psaddr_t, uint32_t *);
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int thr_pread_long(struct td_thragent *, psaddr_t, uint64_t *);
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int thr_pread_ptr(struct td_thragent *, psaddr_t, uint64_t *);
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int thr_pwrite_int(struct td_thragent *, psaddr_t, uint32_t);
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int thr_pwrite_long(struct td_thragent *, psaddr_t, uint64_t);
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int thr_pwrite_ptr(struct td_thragent *, psaddr_t, uint64_t);
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#endif /* _THREAD_DB_INT_H_ */
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