[PATCH] Add i386-specific register set functions
Mark Kettenis
kettenis@chello.nl
Sun Oct 5 21:32:00 GMT 2003
These new functions will be used to support core-files using the newly
introduced register sets.
Committed,
Mark
Index: ChangeLog
from Mark Kettenis <kettenis@gnu.org>
* i386-tdep.h (struct gdbarch_tdep): Add members gregset,
gregset_reg_offset, gregset_num_regs, sizeof_gregset, fpregset,
sizeof_fpregset.
* i386-tdep.c: Include "regset.h".
(i386_supply_gregset): New function.
(i386_supply_fpregset): New function.
(i386_gdbarch_init): Initialze register set-related members of
TDEP.
* x86-64-tdep.c (x86_64_supply_fpregset): New function.
(x86_64_init_abi): Initialize TDEP->sizeof_fpregset.
Index: i386-tdep.c
===================================================================
RCS file: /cvs/src/src/gdb/i386-tdep.c,v
retrieving revision 1.169
diff -u -p -r1.169 i386-tdep.c
--- i386-tdep.c 27 Sep 2003 21:57:56 -0000 1.169
+++ i386-tdep.c 5 Oct 2003 21:28:12 -0000
@@ -37,6 +37,7 @@
#include "osabi.h"
#include "regcache.h"
#include "reggroups.h"
+#include "regset.h"
#include "symfile.h"
#include "symtab.h"
#include "target.h"
@@ -1548,7 +1549,42 @@ i386_value_to_register (struct frame_inf
}
}
+/* Supply register REGNUM from the general-purpose register set REGSET
+ to register cache REGCACHE. If REGNUM is -1, do this for all
+ registers in REGSET. */
+static void
+i386_supply_gregset (const struct regset *regset, struct regcache *regcache,
+ int regnum, const void *gregs, size_t len)
+{
+ const struct gdbarch_tdep *tdep = regset->descr;
+ const char *regs = gregs;
+ int i;
+
+ gdb_assert (len == tdep->sizeof_gregset);
+
+ for (i = 0; i < tdep->gregset_num_regs; i++)
+ {
+ if ((regnum == i || regnum == -1)
+ && tdep->gregset_reg_offset[i] != -1)
+ regcache_raw_supply (regcache, i, regs + tdep->gregset_reg_offset[i]);
+ }
+}
+
+/* Supply register REGNUM from the floating-point register set REGSET
+ to register cache REGCACHE. If REGNUM is -1, do this for all
+ registers in REGSET. */
+
+static void
+i386_supply_fpregset (const struct regset *regset, struct regcache *regcache,
+ int regnum, const void *fpregs, size_t len)
+{
+ const struct gdbarch_tdep *tdep = regset->descr;
+
+ gdb_assert (len == tdep->sizeof_fpregset);
+ i387_supply_fsave (regcache, regnum, fpregs);
+}
+
#ifdef STATIC_TRANSFORM_NAME
/* SunPRO encodes the static variables. This is not related to C++
@@ -1802,6 +1838,16 @@ i386_gdbarch_init (struct gdbarch_info i
/* Allocate space for the new architecture. */
tdep = XMALLOC (struct gdbarch_tdep);
gdbarch = gdbarch_alloc (&info, tdep);
+
+ /* General-purpose registers. */
+ tdep->gregset = NULL;
+ tdep->gregset_reg_offset = NULL;
+ tdep->gregset_num_regs = I386_NUM_GREGS;
+ tdep->sizeof_gregset = 0;
+
+ /* Floating-point registers. */
+ tdep->fpregset = NULL;
+ tdep->sizeof_fpregset = I387_SIZEOF_FSAVE;
/* The default settings include the FPU registers, the MMX registers
and the SSE registers. This can be overidden for a specific ABI
Index: i386-tdep.h
===================================================================
RCS file: /cvs/src/src/gdb/i386-tdep.h,v
retrieving revision 1.26
diff -u -p -r1.26 i386-tdep.h
--- i386-tdep.h 27 Sep 2003 21:57:56 -0000 1.26
+++ i386-tdep.h 5 Oct 2003 21:28:12 -0000
@@ -56,6 +56,16 @@ enum struct_return
/* i386 architecture specific information. */
struct gdbarch_tdep
{
+ /* General-purpose registers. */
+ struct regset *gregset;
+ int *gregset_reg_offset;
+ int gregset_num_regs;
+ size_t sizeof_gregset;
+
+ /* Floating-point registers. */
+ struct regset *fpregset;
+ size_t sizeof_fpregset;
+
/* Register number for %st(0). The register numbers for the other
registers follow from this one. Set this to -1 to indicate the
absence of an FPU. */
Index: x86-64-tdep.c
===================================================================
RCS file: /cvs/src/src/gdb/x86-64-tdep.c,v
retrieving revision 1.95
diff -u -p -r1.95 x86-64-tdep.c
--- x86-64-tdep.c 2 Oct 2003 20:28:30 -0000 1.95
+++ x86-64-tdep.c 5 Oct 2003 21:28:13 -0000
@@ -1203,11 +1203,30 @@ x86_64_frame_align (struct gdbarch *gdba
{
return sp & -(CORE_ADDR)16;
}
+
+
+/* Supply register REGNUM from the floating-point register set REGSET
+ to register cache REGCACHE. If REGNUM is -1, do this for all
+ registers in REGSET. */
+
+static void
+x86_64_supply_fpregset (const struct regset *regset, struct regcache *regcache,
+ int regnum, const void *fpregs, size_t len)
+{
+ const struct gdbarch_tdep *tdep = regset->descr;
+
+ gdb_assert (len == tdep->sizeof_fpregset);
+ x86_64_supply_fxsave (regcache, regnum, fpregs);
+}
void
x86_64_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ /* AMD64 generally uses `fxsave' instead of `fsave' for saving its
+ floating-point registers. */
+ tdep->sizeof_fpregset = I387_SIZEOF_FXSAVE;
/* AMD64 has an FPU and 16 SSE registers. */
tdep->st0_regnum = X86_64_ST0_REGNUM;
More information about the Gdb-patches
mailing list