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[commit] Floating-point register support for PA-RISC BSD's
- From: Mark Kettenis <mark dot kettenis at xs4all dot nl>
- To: gdb-patches at sourceware dot org
- Date: Sat, 14 Jan 2006 13:27:24 +0100 (CET)
- Subject: [commit] Floating-point register support for PA-RISC BSD's
Seems to work on OpenBSD/hppa and should work on NetBSD/hp700 if there
are not too many kernel bugs.
Unfortunately I messed up the commit a bit so the log messages for
these files are a bit wierd. Sorry.
Index: ChangeLog
from Mark Kettenis <kettenis@gnu.org>
* hppa-tdep.h (enum hppa_regnum): Add HPPA_FP31R_REGNUM.
* hppabsd-nat.c (hppabsd_fpregset_supplies_p)
(hppabsd_supply_fpregset, hppabsd_collect_fpregset): New
functions.
(hppabsd_fetch_registers, hppabsd_store_registers): Handle
floating-point registers.
Index: hppa-tdep.h
===================================================================
RCS file: /cvs/src/src/gdb/hppa-tdep.h,v
retrieving revision 1.23
diff -u -p -r1.23 hppa-tdep.h
--- hppa-tdep.h 17 Dec 2005 22:34:01 -0000 1.23
+++ hppa-tdep.h 14 Jan 2006 12:21:06 -0000
@@ -68,6 +68,7 @@ enum hppa_regnum
HPPA_FP0_REGNUM = 64, /* First floating-point. */
HPPA_FP4_REGNUM = 72,
HPPA64_FP4_REGNUM = 68,
+ HPPA_FP31R_REGNUM = 127, /* Last floating-point. */
HPPA_ARG0_REGNUM = 26, /* The first argument of a callee. */
HPPA_ARG1_REGNUM = 25, /* The second argument of a callee. */
Index: hppabsd-nat.c
===================================================================
RCS file: /cvs/src/src/gdb/hppabsd-nat.c,v
retrieving revision 1.5
diff -u -p -r1.5 hppabsd-nat.c
--- hppabsd-nat.c 17 Dec 2005 22:34:01 -0000 1.5
+++ hppabsd-nat.c 14 Jan 2006 12:21:06 -0000
@@ -37,6 +37,12 @@ hppabsd_gregset_supplies_p (int regnum)
return (regnum >= HPPA_R0_REGNUM && regnum <= HPPA_PCOQ_TAIL_REGNUM);
}
+static int
+hppabsd_fpregset_supplies_p (int regnum)
+{
+ return (regnum >= HPPA_FP0_REGNUM && regnum <= HPPA_FP31R_REGNUM);
+}
+
/* Supply the general-purpose registers stored in GREGS to REGCACHE. */
static void
@@ -53,6 +59,22 @@ hppabsd_supply_gregset (struct regcache
regcache_raw_supply (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 33 * 4);
}
+/* Supply the floating-point registers stored in FPREGS to REGCACHE. */
+
+static void
+hppabsd_supply_fpregset (struct regcache *regcache, const void *fpregs)
+{
+ const char *regs = fpregs;
+ int regnum;
+
+ for (regnum = HPPA_FP0_REGNUM; regnum <= HPPA_FP31R_REGNUM;
+ regnum += 2, regs += 8)
+ {
+ regcache_raw_supply (regcache, regnum, regs);
+ regcache_raw_supply (regcache, regnum + 1, regs + 4);
+ }
+}
+
/* Collect the general-purpose registers from REGCACHE and store them
in GREGS. */
@@ -76,6 +98,26 @@ hppabsd_collect_gregset (const struct re
if (regnum == -1 || regnum == HPPA_PCOQ_TAIL_REGNUM)
regcache_raw_collect (regcache, HPPA_PCOQ_TAIL_REGNUM, regs + 33 * 4);
}
+
+/* Collect the floating-point registers from REGCACHE and store them
+ in FPREGS. */
+
+static void
+hppabsd_collect_fpregset (struct regcache *regcache,
+ void *fpregs, int regnum)
+{
+ char *regs = fpregs;
+ int i;
+
+ for (i = HPPA_FP0_REGNUM; i <= HPPA_FP31R_REGNUM; i += 2, regs += 8)
+ {
+ if (regnum == -1 || regnum == i || regnum == i + 1)
+ {
+ regcache_raw_collect (regcache, i, regs);
+ regcache_raw_collect (regcache, i + 1, regs + 4);
+ }
+ }
+}
/* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
@@ -96,6 +138,17 @@ hppabsd_fetch_registers (int regnum)
hppabsd_supply_gregset (regcache, ®s);
}
+
+ if (regnum == -1 || hppabsd_fpregset_supplies_p (regnum))
+ {
+ struct fpreg fpregs;
+
+ if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
+ (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
+ perror_with_name (_("Couldn't get floating point status"));
+
+ hppabsd_supply_fpregset (current_regcache, &fpregs);
+ }
}
/* Store register REGNUM back into the inferior. If REGNUM is -1, do
@@ -118,6 +171,21 @@ hppabsd_store_registers (int regnum)
(PTRACE_TYPE_ARG3) ®s, 0) == -1)
perror_with_name (_("Couldn't write registers"));
}
+
+ if (regnum == -1 || hppabsd_fpregset_supplies_p (regnum))
+ {
+ struct fpreg fpregs;
+
+ if (ptrace (PT_GETFPREGS, PIDGET (inferior_ptid),
+ (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
+ perror_with_name (_("Couldn't get floating point status"));
+
+ hppabsd_collect_fpregset (current_regcache, &fpregs, regnum);
+
+ if (ptrace (PT_SETFPREGS, PIDGET (inferior_ptid),
+ (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
+ perror_with_name (_("Couldn't write floating point status"));
+ }
}
/* Provide a prototype to silence -Wmissing-prototypes. */