diff options
Diffstat (limited to 'gdb/regcache.h')
| -rw-r--r-- | gdb/regcache.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/gdb/regcache.h b/gdb/regcache.h index 3c2dbeb..1db42e3 100644 --- a/gdb/regcache.h +++ b/gdb/regcache.h @@ -88,6 +88,33 @@ extern void supply_register (int regnum, const void *val); extern void regcache_collect (int regnum, void *buf); +/* The register's ``offset''. + + NOTE: cagney/2002-08-17: The ``struct value'' and expression + evaluator treat the register cache as a large liner buffer. + Instead of reading/writing a register using its register number, + the code read/writes registers by specifying their offset into the + buffer and a number of bytes. The code also assumes that these + byte read/writes can cross register boundaries, adjacent registers + treated as a contiguous set of bytes. + + The below map that model onto the real register cache. New code + should go out of their way to avoid using these interfaces. + + FIXME: cagney/2002-08-17: The ``struct value'' and expression + evaluator should be fixed. Instead of using the { offset, length } + pair to describe a value within one or more registers, the code + should use a chain of { regnum, offset, len } tripples. */ + +extern int register_offset_hack (struct gdbarch *gdbarch, int regnum); +extern void regcache_cooked_read_using_offset_hack (struct regcache *regcache, + int offset, int len, + void *buf); +extern void regcache_cooked_write_using_offset_hack (struct regcache *regcache, + int offset, int len, + const void *buf); + + /* The type of a register. This function is slightly more efficient then its gdbarch vector counterpart since it returns a precomputed value stored in a table. |