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[PATCH] Add i387 support for Solaris x86 platforms.
- To: gdb-patches at sourceware dot cygnus dot com
- Subject: [PATCH] Add i387 support for Solaris x86 platforms.
- From: "Peter.Schauer" <Peter dot Schauer at regent dot e-technik dot tu-muenchen dot de>
- Date: Thu, 13 Apr 2000 20:18:34 MET DST
FYI,
I checked in the attached patch to trunk and branch.
It adds i387 support for Solaris x86 platforms.
2000-04-13 Peter Schauer <pes@regent.e-technik.tu-muenchen.de>
* config/i386/tm-i386sol2.h (HAVE_I387_REGS): Define.
* i386v4-nat.c (supply_fpregset, fill_fpregset): Add code
to handle floating point registers if NUM_FREGS is not zero.
--- ./config/i386/tm-i386sol2.h.orig Fri Apr 7 18:29:47 2000
+++ ./config/i386/tm-i386sol2.h Fri Apr 7 18:50:29 2000
@@ -21,6 +21,7 @@
#ifndef TM_I386SOL2_H
#define TM_I386SOL2_H 1
+#define HAVE_I387_REGS
#include "i386/tm-i386v4.h"
/* Signal handler frames under Solaris 2 are recognized by a return address
--- ./i386v4-nat.c.orig Wed Jul 7 22:07:05 1999
+++ ./i386v4-nat.c Fri Apr 7 18:57:01 2000
@@ -142,17 +142,65 @@ fill_gregset (gregsetp, regno)
#endif /* HAVE_GREGSET_T */
-#if defined (FP0_REGNUM) && defined (HAVE_FPREGSET_T)
+#if defined (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
+};
+
void
supply_fpregset (fpregsetp)
fpregset_t *fpregsetp;
{
- /* FIXME: see m68k-tdep.c for an example, for the m68k. */
+ int regi;
+
+ if (NUM_FREGS == 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);
+ }
}
/* Given a pointer to a floating point register set in /proc format
@@ -165,9 +213,41 @@ fill_fpregset (fpregsetp, regno)
fpregset_t *fpregsetp;
int regno;
{
- /* FIXME: see m68k-tdep.c for an example, for the m68k. */
+ int regi;
+
+ if (NUM_FREGS == 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));
+ }
+ }
+ }
}
-#endif /* defined (FP0_REGNUM) && defined (HAVE_FPREGSET_T) */
+#endif /* defined (HAVE_FPREGSET_T) */
#endif /* HAVE_SYS_PROCFS_H */
--
Peter Schauer pes@regent.e-technik.tu-muenchen.de