Initial creation of sourceware repositorygdb-4_18-branchpoint

1 files changed, 159 insertions, 0 deletions

diff --git a/gdb/mipsv4-nat.c b/gdb/mipsv4-nat.c
new file mode 100644
index 0000000..df4b6e9
--- /dev/null
+++ b/gdb/mipsv4-nat.c
@@ -0,0 +1,159 @@
+/* Native support for MIPS running SVR4, for GDB.
+   Copyright 1994, 1995 Free Software Foundation, Inc.
+
+This file is part of GDB.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+#include "defs.h"
+#include "inferior.h"
+#include "gdbcore.h"
+#include "target.h"
+
+#include <sys/time.h>
+#include <sys/procfs.h>
+#include <setjmp.h>		/* For JB_XXX.  */
+
+/* Size of elements in jmpbuf */
+
+#define JB_ELEMENT_SIZE 4
+
+/*
+ * See the comment in m68k-tdep.c regarding the utility of these functions.
+ *
+ * These definitions are from the MIPS SVR4 ABI, so they may work for
+ * any MIPS SVR4 target.
+ */
+
+void 
+supply_gregset (gregsetp)
+     gregset_t *gregsetp;
+{
+  register int regi;
+  register greg_t *regp = &(*gregsetp)[0];
+  static char zerobuf[MAX_REGISTER_RAW_SIZE] = {0};
+
+  for (regi = 0; regi <= CXT_RA; regi++)
+    supply_register (regi, (char *)(regp + regi));
+
+  supply_register (PC_REGNUM, (char *)(regp + CXT_EPC));
+  supply_register (HI_REGNUM, (char *)(regp + CXT_MDHI));
+  supply_register (LO_REGNUM, (char *)(regp + CXT_MDLO));
+  supply_register (CAUSE_REGNUM, (char *)(regp + CXT_CAUSE));
+
+  /* Fill inaccessible registers with zero.  */
+  supply_register (PS_REGNUM, zerobuf);
+  supply_register (BADVADDR_REGNUM, zerobuf);
+  supply_register (FP_REGNUM, zerobuf);
+  supply_register (UNUSED_REGNUM, zerobuf);
+  for (regi = FIRST_EMBED_REGNUM; regi <= LAST_EMBED_REGNUM; regi++)
+    supply_register (regi, zerobuf);
+}
+
+void
+fill_gregset (gregsetp, regno)
+     gregset_t *gregsetp;
+     int regno;
+{
+  int regi;
+  register greg_t *regp = &(*gregsetp)[0];
+
+  for (regi = 0; regi <= 32; regi++)
+    if ((regno == -1) || (regno == regi))
+      *(regp + regi) = *(greg_t *) &registers[REGISTER_BYTE (regi)];
+
+  if ((regno == -1) || (regno == PC_REGNUM))
+    *(regp + CXT_EPC) = *(greg_t *) &registers[REGISTER_BYTE (PC_REGNUM)];
+
+  if ((regno == -1) || (regno == CAUSE_REGNUM))
+    *(regp + CXT_CAUSE) = *(greg_t *) &registers[REGISTER_BYTE (CAUSE_REGNUM)];
+
+  if ((regno == -1) || (regno == HI_REGNUM))
+    *(regp + CXT_MDHI) = *(greg_t *) &registers[REGISTER_BYTE (HI_REGNUM)];
+
+  if ((regno == -1) || (regno == LO_REGNUM))
+    *(regp + CXT_MDLO) = *(greg_t *) &registers[REGISTER_BYTE (LO_REGNUM)];
+}
+
+/*
+ * Now we do the same thing for floating-point registers.
+ * We don't bother to condition on FP0_REGNUM since any
+ * reasonable MIPS configuration has an R3010 in it.
+ *
+ * Again, see the comments in m68k-tdep.c.
+ */
+
+void
+supply_fpregset (fpregsetp)
+     fpregset_t *fpregsetp;
+{
+  register int regi;
+  static char zerobuf[MAX_REGISTER_RAW_SIZE] = {0};
+
+  for (regi = 0; regi < 32; regi++)
+    supply_register (FP0_REGNUM + regi,
+		     (char *)&fpregsetp->fp_r.fp_regs[regi]);
+
+  supply_register (FCRCS_REGNUM, (char *)&fpregsetp->fp_csr);
+
+  /* FIXME: how can we supply FCRIR_REGNUM?  The ABI doesn't tell us. */
+  supply_register (FCRIR_REGNUM, zerobuf);
+}
+
+void
+fill_fpregset (fpregsetp, regno)
+     fpregset_t *fpregsetp;
+     int regno;
+{
+  int regi;
+  char *from, *to;
+
+  for (regi = FP0_REGNUM; regi < FP0_REGNUM + 32; regi++)
+    {
+      if ((regno == -1) || (regno == regi))
+	{
+	  from = (char *) &registers[REGISTER_BYTE (regi)];
+	  to = (char *) &(fpregsetp->fp_r.fp_regs[regi - FP0_REGNUM]);
+	  memcpy(to, from, REGISTER_RAW_SIZE (regi));
+	}
+    }
+
+  if ((regno == -1) || (regno == FCRCS_REGNUM))
+    fpregsetp->fp_csr = *(unsigned *) &registers[REGISTER_BYTE(FCRCS_REGNUM)];
+}
+
+
+/* Figure out where the longjmp will land.
+   We expect the first arg to be a pointer to the jmp_buf structure from which
+   we extract the pc (_JB_PC) that we will land at.  The pc is copied into PC.
+   This routine returns true on success. */
+
+int
+get_longjmp_target (pc)
+     CORE_ADDR *pc;
+{
+  char buf[TARGET_PTR_BIT / TARGET_CHAR_BIT];
+  CORE_ADDR jb_addr;
+
+  jb_addr = read_register (A0_REGNUM);
+
+  if (target_read_memory (jb_addr + _JB_PC * JB_ELEMENT_SIZE, buf,
+			  TARGET_PTR_BIT / TARGET_CHAR_BIT))
+    return 0;
+
+  *pc = extract_address (buf, TARGET_PTR_BIT / TARGET_CHAR_BIT);
+
+  return 1;
+}