-/* Native-dependent code for SVR4 Unix running on i386's, for GDB.
- Copyright 1988, 1989, 1991, 1992, 1996, 1997, 1998, 1999, 2000, 2001
+/* Native-dependent code for SVR4 Unix running on i386's.
+ Copyright 1988, 1989, 1991, 1992, 1996, 1997, 1998, 1999, 2000,
+ 2001, 2002
Free Software Foundation, Inc.
This file is part of GDB.
#include <sys/reg.h>
#endif
+#include "i386-tdep.h"
+#include "i387-tdep.h"
#ifdef HAVE_SYS_PROCFS_H
/* Prototypes for supply_gregset etc. */
#include "gregset.h"
-/* The /proc interface divides the target machine's register set up into
- two different sets, the general register set (gregset) and the floating
- point register set (fpregset). For each set, there is an ioctl to get
- the current register set and another ioctl to set the current values.
+/* The `/proc' interface divides the target machine's register set up
+ into two different sets, the general purpose register set (gregset)
+ and the floating-point register set (fpregset). For each set,
+ there is an ioctl to get the current register set and another ioctl
+ to set the current values.
- The actual structure passed through the ioctl interface is, of course,
- naturally machine dependent, and is different for each set of registers.
- For the i386 for example, the general register set is typically defined
- by:
+ The actual structure passed through the ioctl interface is, of
+ course, naturally machine dependent, and is different for each set
+ of registers. For the i386 for example, the general-purpose
+ register set is typically defined by:
typedef int gregset_t[19]; (in <sys/regset.h>)
#define UESP 17
#define SS 18
- and the floating point set by:
-
- typedef struct fpregset
- {
- union
- {
- struct fpchip_state // fp extension state //
- {
- int state[27]; // 287/387 saved state //
- int status; // status word saved at exception //
- } fpchip_state;
- struct fp_emul_space // for emulators //
- {
- char fp_emul[246];
- char fp_epad[2];
- } fp_emul_space;
- int f_fpregs[62]; // union of the above //
- } fp_reg_set;
- long f_wregs[33]; // saved weitek state //
+ and the floating-point set by:
+
+ typedef struct fpregset {
+ union {
+ struct fpchip_state // fp extension state //
+ {
+ int state[27]; // 287/387 saved state //
+ int status; // status word saved at //
+ // exception //
+ } fpchip_state;
+ struct fp_emul_space // for emulators //
+ {
+ char fp_emul[246];
+ char fp_epad[2];
+ } fp_emul_space;
+ int f_fpregs[62]; // union of the above //
+ } fp_reg_set;
+ long f_wregs[33]; // saved weitek state //
} fpregset_t;
- These routines provide the packing and unpacking of gregset_t and
- fpregset_t formatted data.
+ Incidentally fpchip_state contains the FPU state in the same format
+ as used by the "fsave" instruction, and that's the only thing we
+ support here. I don't know how the emulator stores it state. The
+ Weitek stuff definitely isn't supported.
- */
+ The routines defined here, provide the packing and unpacking of
+ gregset_t and fpregset_t formatted data. */
#ifdef HAVE_GREGSET_T
-/* This is a duplicate of the table in i386-xdep.c. */
-
+/* Mapping between the general-purpose registers in `/proc'
+ format and GDB's register array layout. */
static int regmap[] =
{
EAX, ECX, EDX, EBX,
DS, ES, FS, GS,
};
-/* Prototypes for local functions */
-
-void fill_gregset (gregset_t *, int);
-
-void supply_gregset (gregset_t *);
-
-void supply_fpregset (fpregset_t *);
-
-void fill_fpregset (fpregset_t *, int);
-
-
-/* FIXME: These routine absolutely depends upon (NUM_REGS - NUM_FREGS)
- being less than or equal to the number of registers that can be stored
- in a gregset_t. Note that with the current scheme there will typically
- be more registers actually stored in a gregset_t that what we know
- about. This is bogus and should be fixed. */
-
-/* Given a pointer to a general register set in /proc format (gregset_t *),
- unpack the register contents and supply them as gdb's idea of the current
- register values. */
+/* Fill GDB's register array with the general-purpose register values
+ in *GREGSETP. */
void
supply_gregset (gregset_t *gregsetp)
{
- register int regi;
- register greg_t *regp = (greg_t *) gregsetp;
- extern int regmap[];
-
- for (regi = 0; regi < (NUM_REGS - NUM_FREGS); regi++)
- {
- supply_register (regi, (char *) (regp + regmap[regi]));
- }
+ greg_t *regp = (greg_t *) gregsetp;
+ int i;
+
+ for (i = 0; i < I386_NUM_GREGS; i++)
+ supply_register (i, (char *) (regp + regmap[i]));
}
+/* Fill register REGNO (if it is a general-purpose register) in
+ *GREGSETPS with the value in GDB's register array. If REGNO is -1,
+ do this for all registers. */
+
void
fill_gregset (gregset_t *gregsetp, int regno)
{
- int regi;
- register greg_t *regp = (greg_t *) gregsetp;
- extern int regmap[];
-
- for (regi = 0; regi < (NUM_REGS - NUM_FREGS); regi++)
- {
- if ((regno == -1) || (regno == regi))
- {
- *(regp + regmap[regi]) = *(int *) ®isters[REGISTER_BYTE (regi)];
- }
- }
+ greg_t *regp = (greg_t *) gregsetp;
+ int i;
+
+ for (i = 0; i < I386_NUM_GREGS; i++)
+ if (regno == -1 || regno == i)
+ regcache_collect (i, regp + regmap[i]);
}
#endif /* HAVE_GREGSET_T */
-#if defined (HAVE_FPREGSET_T)
+#ifdef HAVE_FPREGSET_T
-/* Given a pointer to a floating point register set in /proc format
- (fpregset_t *), unpack the register contents and supply them as gdb's
- idea of the current floating point register values. */
-
-/* FIXME: Assumes that fpregsetp contains an i387 FSAVE area. */
-static const int freg_offset_map[] =
-{
-#if !defined(FPREGSET_FSAVE_OFFSET)
-#define FPREGSET_FSAVE_OFFSET 0
-#endif
- FPREGSET_FSAVE_OFFSET + 28 + 0 * 10,
- FPREGSET_FSAVE_OFFSET + 28 + 1 * 10,
- FPREGSET_FSAVE_OFFSET + 28 + 2 * 10,
- FPREGSET_FSAVE_OFFSET + 28 + 3 * 10,
- FPREGSET_FSAVE_OFFSET + 28 + 4 * 10,
- FPREGSET_FSAVE_OFFSET + 28 + 5 * 10,
- FPREGSET_FSAVE_OFFSET + 28 + 6 * 10,
- FPREGSET_FSAVE_OFFSET + 28 + 7 * 10,
- FPREGSET_FSAVE_OFFSET + 0,
- FPREGSET_FSAVE_OFFSET + 4,
- FPREGSET_FSAVE_OFFSET + 8,
- FPREGSET_FSAVE_OFFSET + 16,
- FPREGSET_FSAVE_OFFSET + 12,
- FPREGSET_FSAVE_OFFSET + 24,
- FPREGSET_FSAVE_OFFSET + 20,
- FPREGSET_FSAVE_OFFSET + 16
-};
+/* Fill GDB's register array with the floating-point register values in
+ *FPREGSETP. */
void
supply_fpregset (fpregset_t *fpregsetp)
{
- int regi;
-
- if (NUM_FREGS == 0)
+ if (FP0_REGNUM == 0)
return;
- for (regi = FP0_REGNUM; regi <= LAST_FPU_CTRL_REGNUM; regi++)
- {
- char tbuf[4];
- ULONGEST tval;
- char *from = (char *) fpregsetp + freg_offset_map[regi - FP0_REGNUM];
-
- if (regi == FCS_REGNUM)
- {
- tval = extract_unsigned_integer (from, 4) & 0xffff;
- store_unsigned_integer (tbuf, 4, tval);
- supply_register (regi, tbuf);
- }
- else if (regi == FOP_REGNUM)
- {
- tval = (extract_unsigned_integer (from, 4) >> 16) & ((1 << 11) - 1);
- store_unsigned_integer (tbuf, 4, tval);
- supply_register (regi, tbuf);
- }
- else
- supply_register (regi, from);
- }
+
+ i387_supply_fsave (current_regcache, -1, fpregsetp);
}
-/* Given a pointer to a floating point register set in /proc format
- (fpregset_t *), update the register specified by REGNO from gdb's idea
- of the current floating point register set. If REGNO is -1, update
- them all. */
+/* Fill register REGNO (if it is a floating-point register) in
+ *FPREGSETP with the value in GDB's register array. If REGNO is -1,
+ do this for all registers. */
void
fill_fpregset (fpregset_t *fpregsetp, int regno)
{
- int regi;
-
- if (NUM_FREGS == 0)
+ if (FP0_REGNUM == 0)
return;
- for (regi = FP0_REGNUM; regi <= LAST_FPU_CTRL_REGNUM; regi++)
- {
- if ((regno == -1) || (regno == regi))
- {
- char *to = (char *) fpregsetp + freg_offset_map[regi - FP0_REGNUM];
- char *from = (char *) ®isters[REGISTER_BYTE (regi)];
- ULONGEST valto;
- ULONGEST valfrom;
-
- if (regi == FCS_REGNUM)
- {
- valto = extract_unsigned_integer (to, 4);
- valfrom = extract_unsigned_integer (from, 4);
- valto = (valto & ~0xffff) | (valfrom & 0xffff);
- store_unsigned_integer (to, 4, valto);
- }
- else if (regi == FOP_REGNUM)
- {
- valto = extract_unsigned_integer (to, 4);
- valfrom = extract_unsigned_integer (from, 4);
- valto = (valto & 0xffff) | ((valfrom & ((1 << 11) - 1)) << 16);
- store_unsigned_integer (to, 4, valto);
- }
- else
- {
- memcpy (to, from, REGISTER_RAW_SIZE (regi));
- }
- }
- }
+
+ i387_fill_fsave ((char *) fpregsetp, regno);
}
-#endif /* defined (HAVE_FPREGSET_T) */
+#endif /* HAVE_FPREGSET_T */
#endif /* HAVE_SYS_PROCFS_H */
projects / deliverable / binutils-gdb.git / blobdiff