X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=gdb%2Fregcache.c;h=e6b6f890f50bc0cff4ead4c6764229922698d3b3;hb=720a66cfb68d5d7d8f2e18e9b44c346ac630c68b;hp=6c5915b414e6719d61a4bd1f030e36758ebe3b3d;hpb=e26167887817eaf9d6a4db73b96ca1dde47a7ac2;p=platform%2Fupstream%2Fbinutils.git diff --git a/gdb/regcache.c b/gdb/regcache.c index 6c5915b..e6b6f89 100644 --- a/gdb/regcache.c +++ b/gdb/regcache.c @@ -24,12 +24,10 @@ #include "gdbcmd.h" #include "regcache.h" #include "reggroups.h" -#include "gdb_assert.h" -#include #include "observer.h" -#include "exceptions.h" #include "remote.h" #include "valprint.h" +#include "regset.h" /* * DATA STRUCTURE @@ -217,22 +215,22 @@ regcache_xmalloc_1 (struct gdbarch *gdbarch, struct address_space *aspace, gdb_assert (gdbarch != NULL); descr = regcache_descr (gdbarch); - regcache = XMALLOC (struct regcache); + regcache = XNEW (struct regcache); regcache->descr = descr; regcache->readonly_p = readonly_p; if (readonly_p) { regcache->registers - = XCALLOC (descr->sizeof_cooked_registers, gdb_byte); + = XCNEWVEC (gdb_byte, descr->sizeof_cooked_registers); regcache->register_status - = XCALLOC (descr->sizeof_cooked_register_status, signed char); + = XCNEWVEC (signed char, descr->sizeof_cooked_register_status); } else { regcache->registers - = XCALLOC (descr->sizeof_raw_registers, gdb_byte); + = XCNEWVEC (gdb_byte, descr->sizeof_raw_registers); regcache->register_status - = XCALLOC (descr->sizeof_raw_register_status, signed char); + = XCNEWVEC (signed char, descr->sizeof_raw_register_status); } regcache->aspace = aspace; regcache->ptid = minus_one_ptid; @@ -267,6 +265,32 @@ make_cleanup_regcache_xfree (struct regcache *regcache) return make_cleanup (do_regcache_xfree, regcache); } +/* Cleanup routines for invalidating a register. */ + +struct register_to_invalidate +{ + struct regcache *regcache; + int regnum; +}; + +static void +do_regcache_invalidate (void *data) +{ + struct register_to_invalidate *reg = data; + + regcache_invalidate (reg->regcache, reg->regnum); +} + +static struct cleanup * +make_cleanup_regcache_invalidate (struct regcache *regcache, int regnum) +{ + struct register_to_invalidate* reg = XNEW (struct register_to_invalidate); + + reg->regcache = regcache; + reg->regnum = regnum; + return make_cleanup_dtor (do_regcache_invalidate, (void *) reg, xfree); +} + /* Return REGCACHE's architecture. */ struct gdbarch * @@ -511,6 +535,13 @@ get_current_regcache (void) return get_thread_regcache (inferior_ptid); } +/* See common/common-regcache.h. */ + +struct regcache * +get_thread_regcache_for_ptid (ptid_t ptid) +{ + return get_thread_regcache (ptid); +} /* Observer for the target_changed event. */ @@ -846,7 +877,8 @@ void regcache_raw_write (struct regcache *regcache, int regnum, const gdb_byte *buf) { - struct cleanup *old_chain; + struct cleanup *chain_before_save_inferior; + struct cleanup *chain_before_invalidate_register; gdb_assert (regcache != NULL && buf != NULL); gdb_assert (regnum >= 0 && regnum < regcache->descr->nr_raw_registers); @@ -864,16 +896,26 @@ regcache_raw_write (struct regcache *regcache, int regnum, regcache->descr->sizeof_register[regnum]) == 0)) return; - old_chain = save_inferior_ptid (); + chain_before_save_inferior = save_inferior_ptid (); inferior_ptid = regcache->ptid; target_prepare_to_store (regcache); memcpy (register_buffer (regcache, regnum), buf, regcache->descr->sizeof_register[regnum]); regcache->register_status[regnum] = REG_VALID; + + /* Register a cleanup function for invalidating the register after it is + written, in case of a failure. */ + chain_before_invalidate_register + = make_cleanup_regcache_invalidate (regcache, regnum); + target_store_registers (regcache, regnum); - do_cleanups (old_chain); + /* The target did not throw an error so we can discard invalidating the + register and restore the cleanup chain to what it was. */ + discard_cleanups (chain_before_invalidate_register); + + do_cleanups (chain_before_save_inferior); } void @@ -1031,6 +1073,92 @@ regcache_raw_collect (const struct regcache *regcache, int regnum, void *buf) memcpy (buf, regbuf, size); } +/* Transfer a single or all registers belonging to a certain register + set to or from a buffer. This is the main worker function for + regcache_supply_regset and regcache_collect_regset. */ + +static void +regcache_transfer_regset (const struct regset *regset, + const struct regcache *regcache, + struct regcache *out_regcache, + int regnum, const void *in_buf, + void *out_buf, size_t size) +{ + const struct regcache_map_entry *map; + int offs = 0, count; + + for (map = regset->regmap; (count = map->count) != 0; map++) + { + int regno = map->regno; + int slot_size = map->size; + + if (slot_size == 0 && regno != REGCACHE_MAP_SKIP) + slot_size = regcache->descr->sizeof_register[regno]; + + if (regno == REGCACHE_MAP_SKIP + || (regnum != -1 + && (regnum < regno || regnum >= regno + count))) + offs += count * slot_size; + + else if (regnum == -1) + for (; count--; regno++, offs += slot_size) + { + if (offs + slot_size > size) + break; + + if (out_buf) + regcache_raw_collect (regcache, regno, + (gdb_byte *) out_buf + offs); + else + regcache_raw_supply (out_regcache, regno, in_buf + ? (const gdb_byte *) in_buf + offs + : NULL); + } + else + { + /* Transfer a single register and return. */ + offs += (regnum - regno) * slot_size; + if (offs + slot_size > size) + return; + + if (out_buf) + regcache_raw_collect (regcache, regnum, + (gdb_byte *) out_buf + offs); + else + regcache_raw_supply (out_regcache, regnum, in_buf + ? (const gdb_byte *) in_buf + offs + : NULL); + return; + } + } +} + +/* Supply register REGNUM from BUF to REGCACHE, using the register map + in REGSET. If REGNUM is -1, do this for all registers in REGSET. + If BUF is NULL, set the register(s) to "unavailable" status. */ + +void +regcache_supply_regset (const struct regset *regset, + struct regcache *regcache, + int regnum, const void *buf, size_t size) +{ + regcache_transfer_regset (regset, regcache, regcache, regnum, + buf, NULL, size); +} + +/* Collect register REGNUM from REGCACHE to BUF, using the register + map in REGSET. If REGNUM is -1, do this for all registers in + REGSET. */ + +void +regcache_collect_regset (const struct regset *regset, + const struct regcache *regcache, + int regnum, void *buf, size_t size) +{ + regcache_transfer_regset (regset, regcache, NULL, regnum, + NULL, buf, size); +} + /* Special handling for register PC. */