diff options
| -rw-r--r-- | gdb/ChangeLog | 12 | ||||
| -rw-r--r-- | gdb/regcache.c | 80 | ||||
| -rw-r--r-- | gdb/regcache.h | 17 |
3 files changed, 109 insertions, 0 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog index ba4f285..585c3d5 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,15 @@ +2002-08-18 Andrew Cagney <ac131313@redhat.com> + + * regcache.c (regcache_xfer_part): New function. + (regcache_raw_read_part): New function. + (regcache_raw_write_part): New function. + (regcache_cooked_read_part): New function. + (regcache_cooked_write_part): New function. + * regcache.h (regcache_raw_read_part): Declare. + (regcache_raw_write_part): Declare. + (regcache_cooked_read_part): Declare. + (regcache_cooked_write_part): Declare. + 2002-08-18 Daniel Jacobowitz <drow@mvista.com> * remote.c (remote_open_1): Add async_p. diff --git a/gdb/regcache.c b/gdb/regcache.c index e46f082..e483de0 100644 --- a/gdb/regcache.c +++ b/gdb/regcache.c @@ -916,6 +916,86 @@ write_register_bytes (int myregstart, char *myaddr, int inlen) } } +/* Perform a partial register transfer using a read, modify, write + operation. */ + +typedef void (regcache_read_ftype) (struct regcache *regcache, int regnum, + void *buf); +typedef void (regcache_write_ftype) (struct regcache *regcache, int regnum, + const void *buf); + +void +regcache_xfer_part (struct regcache *regcache, int regnum, + int offset, int len, void *in, const void *out, + regcache_read_ftype *read, regcache_write_ftype *write) +{ + struct regcache_descr *descr = regcache->descr; + bfd_byte *reg = alloca (descr->max_register_size); + gdb_assert (offset >= 0 && offset <= descr->sizeof_register[regnum]); + gdb_assert (len >= 0 && offset + len <= descr->sizeof_register[regnum]); + /* Something to do? */ + if (offset + len == 0) + return; + /* Read (when needed) ... */ + if (in != NULL + || offset > 0 + || offset + len < descr->sizeof_register[regnum]) + { + gdb_assert (read != NULL); + read (regcache, regnum, reg); + } + /* ... modify ... */ + if (in != NULL) + memcpy (in, reg + offset, len); + if (out != NULL) + memcpy (reg + offset, out, len); + /* ... write (when needed). */ + if (out != NULL) + { + gdb_assert (write != NULL); + write (regcache, regnum, reg); + } +} + +void +regcache_raw_read_part (struct regcache *regcache, int regnum, + int offset, int len, void *buf) +{ + struct regcache_descr *descr = regcache->descr; + gdb_assert (regnum >= 0 && regnum < descr->nr_raw_registers); + regcache_xfer_part (regcache, regnum, offset, len, buf, NULL, + regcache_raw_read, regcache_raw_write); +} + +void +regcache_raw_write_part (struct regcache *regcache, int regnum, + int offset, int len, const void *buf) +{ + struct regcache_descr *descr = regcache->descr; + gdb_assert (regnum >= 0 && regnum < descr->nr_raw_registers); + regcache_xfer_part (regcache, regnum, offset, len, NULL, buf, + regcache_raw_read, regcache_raw_write); +} + +void +regcache_cooked_read_part (struct regcache *regcache, int regnum, + int offset, int len, void *buf) +{ + struct regcache_descr *descr = regcache->descr; + gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); + regcache_xfer_part (regcache, regnum, offset, len, buf, NULL, + regcache_cooked_read, regcache_cooked_write); +} + +void +regcache_cooked_write_part (struct regcache *regcache, int regnum, + int offset, int len, const void *buf) +{ + struct regcache_descr *descr = regcache->descr; + gdb_assert (regnum >= 0 && regnum < descr->nr_cooked_registers); + regcache_xfer_part (regcache, regnum, offset, len, NULL, buf, + regcache_cooked_read, regcache_cooked_write); +} /* Return the contents of register REGNUM as an unsigned integer. */ diff --git a/gdb/regcache.h b/gdb/regcache.h index 4f6a079..da91fd6 100644 --- a/gdb/regcache.h +++ b/gdb/regcache.h @@ -42,6 +42,15 @@ extern void regcache_raw_read_signed (struct regcache *regcache, int regnum, LONGEST *val); extern void regcache_raw_read_unsigned (struct regcache *regcache, int regnum, ULONGEST *val); + +/* Partial transfer of a raw registers. These perform read, modify, + write style operations. */ + +void regcache_raw_read_part (struct regcache *regcache, int regnum, + int offset, int len, void *buf); +void regcache_raw_write_part (struct regcache *regcache, int regnum, + int offset, int len, const void *buf); + int regcache_valid_p (struct regcache *regcache, int regnum); /* Transfer a cooked register [0..NUM_REGS+NUM_PSEUDO_REGS). */ @@ -63,6 +72,14 @@ extern void regcache_cooked_read_signed (struct regcache *regcache, extern void regcache_cooked_read_unsigned (struct regcache *regcache, int regnum, ULONGEST *val); +/* Partial transfer of a cooked register. These perform read, modify, + write style operations. */ + +void regcache_cooked_read_part (struct regcache *regcache, int regnum, + int offset, int len, void *buf); +void regcache_cooked_write_part (struct regcache *regcache, int regnum, + int offset, int len, const void *buf); + /* Transfer a raw register [0..NUM_REGS) between the regcache and the target. These functions are called by the target in response to a target_fetch_registers() or target_store_registers(). */ |