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Share regcache function regcache_raw_read_unsigned

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This patch is in preparation for software single step support on ARM in
GDBServer. It adds a new shared function regcache_raw_read_unsigned and
regcache_raw_get_unsigned so that GDB and GDBServer can use the same call
to fetch a raw register into an integer.

No regressions, tested on ubuntu 14.04 ARMv7 and x86.
With gdbserver-{native,extended} / { -marm -mthumb }

gdb/ChangeLog:

	* Makefile.in (SFILES): Append common/common-regcache.c.
	(COMMON_OBS): Append common/common-regcache.o.
	(common-regcache.o): New rule.
	* common/common-regcache.h (register_status) New enum.
	(regcache_raw_read_unsigned): New declaration.
	* common/common-regcache.c: New file.
	* regcache.h (enum register_status): Move to common-regcache.h.
	(regcache_raw_read_unsigned): Likewise.
	(regcache_raw_get_unsigned): Likewise.

gdb/gdbserver/ChangeLog:

	* Makefile.in (SFILES): Append common/common-regcache.c.
	(OBS): Append common-regcache.o.
	(common-regcache.o): New rule.
	* regcache.c (init_register_cache): Initialize cache to
	REG_UNAVAILABLE.
	(regcache_raw_read_unsigned): New function.
	* regcache.h (REG_UNAVAILABLE, REG_VALID): Replaced by shared
	register_status enum.
This commit is contained in:
Antoine Tremblay
2015-12-18 11:33:59 -05:00
parent d0e59a6888
commit 68ce205943
10 changed files with 119 additions and 51 deletions
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26
gdb/gdbserver/regcache.c
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@@ -145,8 +145,9 @@ init_register_cache (struct regcache *regcache,
= (unsigned char *) xcalloc (1, tdesc->registers_size);
regcache->registers_owned = 1;
regcache->register_status
= (unsigned char *) xcalloc (1, tdesc->num_registers);
gdb_assert (REG_UNAVAILABLE == 0);
= (unsigned char *) xmalloc (tdesc->num_registers);
memset ((void *) regcache->register_status, REG_UNAVAILABLE,
tdesc->num_registers);
#else
gdb_assert_not_reached ("can't allocate memory from the heap");
#endif
@@ -435,6 +436,27 @@ collect_register (struct regcache *regcache, int n, void *buf)
register_size (regcache->tdesc, n));
}
enum register_status
regcache_raw_read_unsigned (struct regcache *regcache, int regnum,
ULONGEST *val)
{
int size;
gdb_assert (regcache != NULL);
gdb_assert (regnum >= 0 && regnum < regcache->tdesc->num_registers);
size = register_size (regcache->tdesc, regnum);
if (size > (int) sizeof (ULONGEST))
error (_("That operation is not available on integers of more than"
"%d bytes."),
(int) sizeof (ULONGEST));
collect_register (regcache, regnum, val);
return REG_VALID;
}
#ifndef IN_PROCESS_AGENT
void