diff options
Diffstat (limited to 'gdb/trad-frame.c')
| -rw-r--r-- | gdb/trad-frame.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/gdb/trad-frame.c b/gdb/trad-frame.c index fd9f240..a3484d2 100644 --- a/gdb/trad-frame.c +++ b/gdb/trad-frame.c @@ -22,6 +22,7 @@ #include "trad-frame.h" #include "regcache.h" #include "frame-unwind.h" +#include "target.h" #include "value.h" struct trad_frame_cache @@ -149,6 +150,62 @@ trad_frame_set_reg_addr (struct trad_frame_cache *this_trad_cache, } void +trad_frame_set_reg_regmap (struct trad_frame_cache *this_trad_cache, + const struct regcache_map_entry *regmap, + CORE_ADDR addr, size_t size) +{ + struct gdbarch *gdbarch = get_frame_arch (this_trad_cache->this_frame); + int offs = 0, count; + + for (; (count = regmap->count) != 0; regmap++) + { + int regno = regmap->regno; + int slot_size = regmap->size; + + if (slot_size == 0 && regno != REGCACHE_MAP_SKIP) + slot_size = register_size (gdbarch, regno); + + if (offs + slot_size > size) + break; + + if (regno == REGCACHE_MAP_SKIP) + offs += count * slot_size; + else + for (; count--; regno++, offs += slot_size) + { + /* Mimic the semantics of regcache::transfer_regset if a + register slot's size does not match the size of a + register. + + If a register slot is larger than a register, assume + the register's value is stored in the first N bytes of + the slot and ignore the remaining bytes. + + If the register slot is smaller than the register, + assume that the slot contains the low N bytes of the + register's value. Since trad_frame assumes that + registers stored by address are sized according to the + register, read the low N bytes and zero-extend them to + generate a register value. */ + if (slot_size >= register_size (gdbarch, regno)) + trad_frame_set_reg_addr (this_trad_cache, regno, addr + offs); + else + { + enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); + gdb_byte buf[slot_size]; + + if (target_read_memory (addr + offs, buf, sizeof buf) == 0) + { + LONGEST val + = extract_unsigned_integer (buf, sizeof buf, byte_order); + trad_frame_set_reg_value (this_trad_cache, regno, val); + } + } + } + } +} + +void trad_frame_set_unknown (struct trad_frame_saved_reg this_saved_regs[], int regnum) { |