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| author | Andrew Cagney <cagney@redhat.com> | 2002-08-19 00:43:41 +0000 |
|---|---|---|
| committer | Andrew Cagney <cagney@redhat.com> | 2002-08-19 00:43:41 +0000 |
| commit | 06c0b04e1c76a02e8aba3a590f65acdd30011dba (patch) | |
| tree | f66e0f45746dc73679c7d9e298490e79e41e20ae /gdb/regcache.c | |
| parent | 0c528862c525f4158d36efc55c37ccc49b9e8cff (diff) | |
| download | gdb-06c0b04e1c76a02e8aba3a590f65acdd30011dba.zip gdb-06c0b04e1c76a02e8aba3a590f65acdd30011dba.tar.gz gdb-06c0b04e1c76a02e8aba3a590f65acdd30011dba.tar.bz2 | |
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.
Diffstat (limited to 'gdb/regcache.c')
| -rw-r--r-- | gdb/regcache.c | 80 |
1 files changed, 80 insertions, 0 deletions
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. */ |