diff options
Diffstat (limited to 'gdb')
| -rw-r--r-- | gdb/ChangeLog | 7 | ||||
| -rw-r--r-- | gdb/h8300-tdep.c | 48 |
2 files changed, 51 insertions, 4 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 6f0f903..5e9e9b8 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,5 +1,12 @@ 2014-02-12 Pedro Alves <palves@redhat.com> + * h8300-tdep.c (pseudo_from_raw_register) + (raw_from_pseudo_register): New functions. + (h8300_pseudo_register_read, h8300_pseudo_register_write): Use + them. + +2014-02-12 Pedro Alves <palves@redhat.com> + * h8300-tdep.c (h8300_register_sim_regno): New function. (h8300_gdbarch_init): Install h8300_register_sim_regno as gdbarch_register_sim_regno hook. diff --git a/gdb/h8300-tdep.c b/gdb/h8300-tdep.c index 4193287..98343e0 100644 --- a/gdb/h8300-tdep.c +++ b/gdb/h8300-tdep.c @@ -1164,15 +1164,55 @@ h8300_register_type (struct gdbarch *gdbarch, int regno) } } +/* Helpers for h8300_pseudo_register_read. We expose ccr/exr as + pseudo-registers to users with smaller sizes than the corresponding + raw registers. These helpers extend/narrow the values. */ + +static enum register_status +pseudo_from_raw_register (struct gdbarch *gdbarch, struct regcache *regcache, + gdb_byte *buf, int pseudo_regno, int raw_regno) +{ + enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); + enum register_status status; + ULONGEST val; + + status = regcache_raw_read_unsigned (regcache, raw_regno, &val); + if (status == REG_VALID) + store_unsigned_integer (buf, + register_size (gdbarch, pseudo_regno), + byte_order, val); + return status; +} + +/* See pseudo_from_raw_register. */ + +static void +raw_from_pseudo_register (struct gdbarch *gdbarch, struct regcache *regcache, + const gdb_byte *buf, int raw_regno, int pseudo_regno) +{ + enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); + ULONGEST val; + + val = extract_unsigned_integer (buf, register_size (gdbarch, pseudo_regno), + byte_order); + regcache_raw_write_unsigned (regcache, raw_regno, val); +} + static enum register_status h8300_pseudo_register_read (struct gdbarch *gdbarch, struct regcache *regcache, int regno, gdb_byte *buf) { if (regno == E_PSEUDO_CCR_REGNUM (gdbarch)) - return regcache_raw_read (regcache, E_CCR_REGNUM, buf); + { + return pseudo_from_raw_register (gdbarch, regcache, buf, + regno, E_CCR_REGNUM); + } else if (regno == E_PSEUDO_EXR_REGNUM (gdbarch)) - return regcache_raw_read (regcache, E_EXR_REGNUM, buf); + { + return pseudo_from_raw_register (gdbarch, regcache, buf, + regno, E_EXR_REGNUM); + } else return regcache_raw_read (regcache, regno, buf); } @@ -1183,9 +1223,9 @@ h8300_pseudo_register_write (struct gdbarch *gdbarch, const gdb_byte *buf) { if (regno == E_PSEUDO_CCR_REGNUM (gdbarch)) - regcache_raw_write (regcache, E_CCR_REGNUM, buf); + raw_from_pseudo_register (gdbarch, regcache, buf, E_CCR_REGNUM, regno); else if (regno == E_PSEUDO_EXR_REGNUM (gdbarch)) - regcache_raw_write (regcache, E_EXR_REGNUM, buf); + raw_from_pseudo_register (gdbarch, regcache, buf, E_EXR_REGNUM, regno); else regcache_raw_write (regcache, regno, buf); } |