* sparc-nat.c (store_inferior_registers): Fill in all members of

	inferior_fp_registers by reading them from the inferior before
	modifying and writing them back.
	Fixes unexplainable inferior FP exceptions after calls to the inferior
	or setting of floating point registers.
	* mips-tdep.c (mips_skip_prologue):  Skip move of argument register
	to register which is generated by gcc-2.4.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 1a24949..1c1da47 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,13 @@
+Mon May 24 23:50:05 1993  Peter Schauer  (pes@regent.e-technik.tu-muenchen.de)
+
+       * sparc-nat.c (store_inferior_registers):  Fill in all members of
+       inferior_fp_registers by reading them from the inferior before
+       modifying and writing them back.
+       Fixes unexplainable inferior FP exceptions after calls to the inferior
+       or setting of floating point registers.
+       * mips-tdep.c (mips_skip_prologue):  Skip move of argument register
+       to register which is generated by gcc-2.4.
+
 Tue May 25 00:42:39 1993  Ken Raeburn  (raeburn@cygnus.com)
 
        * hppa-pinsn.c: Define OLD_TABLE before including opcode/hppa.h.

diff --git a/gdb/mips-tdep.c b/gdb/mips-tdep.c
index aa6cd30..a853cd6 100644 (file)
--- a/gdb/mips-tdep.c
+++ b/gdb/mips-tdep.c
@@ -95,9 +95,11 @@ read_next_frame_reg(fi, regno)
      immediately below the frame and we get the saved registers from there.
      If the stack layout for sigtramp changes we might have to change these
      constants and the companion fixup_sigtramp in mipsread.c  */
+#ifndef SIGFRAME_BASE
 #define SIGFRAME_BASE          0x12c   /* sizeof(sigcontext) */
 #define SIGFRAME_PC_OFF                (-SIGFRAME_BASE + 2 * 4)
 #define SIGFRAME_REGSAVE_OFF   (-SIGFRAME_BASE + 3 * 4)
+#endif
   for (; fi; fi = fi->next)
       if (in_sigtramp(fi->pc, 0)) {
          int offset;
@@ -771,6 +773,8 @@ mips_skip_prologue(pc)
            continue;                           /* reg != $zero */
        else if (inst == 0x03A0F021)            /* move $s8,$sp */
            continue;
+       else if ((inst & 0xFF9F07FF) == 0x00800021) /* move reg,$a0-$a3 */
+           continue;
        else
            break;
     }

diff --git a/gdb/sparc-nat.c b/gdb/sparc-nat.c
index f622b13..0147055 100644 (file)
--- a/gdb/sparc-nat.c
+++ b/gdb/sparc-nat.c
@@ -222,6 +222,12 @@ store_inferior_registers (regno)
   if (wanna_store & FP_REGS)
     {
       if (!register_valid[FP0_REGNUM+9]) abort();
+      /* Initialize inferior_fp_registers members that gdb doesn't set
+        by reading them from the inferior.  */
+      if (0 !=
+        ptrace (PTRACE_GETFPREGS, inferior_pid,
+                (PTRACE_ARG3_TYPE) &inferior_fp_registers, 0))
+        perror("ptrace_getfpregs");
       memcpy (&inferior_fp_registers, &registers[REGISTER_BYTE (FP0_REGNUM)],
              sizeof inferior_fp_registers.fpu_fr);