diff options
Diffstat (limited to 'gdb/common')
| -rw-r--r-- | gdb/common/common-regcache.c | 36 | ||||
| -rw-r--r-- | gdb/common/common-regcache.h | 24 |
2 files changed, 60 insertions, 0 deletions
diff --git a/gdb/common/common-regcache.c b/gdb/common/common-regcache.c new file mode 100644 index 0000000..9ee1102 --- /dev/null +++ b/gdb/common/common-regcache.c @@ -0,0 +1,36 @@ +/* Cache and manage the values of registers for GDB, the GNU debugger. + + Copyright (C) 2015 Free Software Foundation, Inc. + + This file is part of GDB. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. */ + +#include "common-defs.h" +#include "common-regcache.h" + +/* Return the register's value or throw if it's not available. */ + +ULONGEST +regcache_raw_get_unsigned (struct regcache *regcache, int regnum) +{ + ULONGEST value; + enum register_status status; + + status = regcache_raw_read_unsigned (regcache, regnum, &value); + if (status == REG_UNAVAILABLE) + throw_error (NOT_AVAILABLE_ERROR, + _("Register %d is not available"), regnum); + return value; +} diff --git a/gdb/common/common-regcache.h b/gdb/common/common-regcache.h index c470603..97c186c 100644 --- a/gdb/common/common-regcache.h +++ b/gdb/common/common-regcache.h @@ -22,6 +22,24 @@ /* This header is a stopgap until we have an independent regcache. */ +enum register_status + { + /* The register value is not in the cache, and we don't know yet + whether it's available in the target (or traceframe). */ + REG_UNKNOWN = 0, + + /* The register value is valid and cached. */ + REG_VALID = 1, + + /* The register value is unavailable. E.g., we're inspecting a + traceframe, and this register wasn't collected. Note that this + is different a different "unavailable" from saying the register + does not exist in the target's architecture --- in that case, + the target should have given us a target description that does + not include the register in the first place. */ + REG_UNAVAILABLE = -1 + }; + /* Return a pointer to the register cache associated with the thread specified by PTID. This function must be provided by the client. */ @@ -38,4 +56,10 @@ extern int regcache_register_size (const struct regcache *regcache, int n); extern CORE_ADDR regcache_read_pc (struct regcache *regcache); +/* Read a raw register into a unsigned integer. */ +extern enum register_status regcache_raw_read_unsigned + (struct regcache *regcache, int regnum, ULONGEST *val); + +ULONGEST regcache_raw_get_unsigned (struct regcache *regcache, int regnum); + #endif /* COMMON_REGCACHE_H */ |