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-rw-r--r--gdb/trad-frame.c68
1 files changed, 53 insertions, 15 deletions
diff --git a/gdb/trad-frame.c b/gdb/trad-frame.c
index 92e6f83..d73813b 100644
--- a/gdb/trad-frame.c
+++ b/gdb/trad-frame.c
@@ -38,36 +38,70 @@ trad_frame_alloc_saved_regs (struct frame_info *next_frame)
struct trad_frame_saved_reg *this_saved_regs
= FRAME_OBSTACK_CALLOC (numregs, struct trad_frame_saved_reg);
for (regnum = 0; regnum < numregs; regnum++)
- this_saved_regs[regnum].realnum = regnum;
+ {
+ this_saved_regs[regnum].realreg = regnum;
+ this_saved_regs[regnum].addr = -1;
+ }
return this_saved_regs;
}
+enum { REG_VALUE = -1, REG_UNKNOWN = -2 };
+
+int
+trad_frame_value_p (struct trad_frame_saved_reg this_saved_regs[], int regnum)
+{
+ return (this_saved_regs[regnum].realreg == REG_VALUE);
+}
+
+int
+trad_frame_addr_p (struct trad_frame_saved_reg this_saved_regs[], int regnum)
+{
+ return (this_saved_regs[regnum].realreg >= 0
+ && this_saved_regs[regnum].addr != -1);
+}
+
+int
+trad_frame_realreg_p (struct trad_frame_saved_reg this_saved_regs[],
+ int regnum)
+{
+ return (this_saved_regs[regnum].realreg >= 0
+ && this_saved_regs[regnum].addr == -1);
+}
+
void
-trad_frame_register_value (struct trad_frame_saved_reg this_saved_regs[],
- int regnum, LONGEST val)
+trad_frame_set_value (struct trad_frame_saved_reg this_saved_regs[],
+ int regnum, LONGEST val)
{
- /* Make the REALNUM invalid, indicating that the ADDR contains the
+ /* Make the REALREG invalid, indicating that the ADDR contains the
register's value. */
- this_saved_regs[regnum].realnum = -1;
+ this_saved_regs[regnum].realreg = REG_VALUE;
this_saved_regs[regnum].addr = val;
}
void
+trad_frame_set_unknown (struct trad_frame_saved_reg this_saved_regs[],
+ int regnum)
+{
+ /* Make the REALREG invalid, indicating that the value is not known. */
+ this_saved_regs[regnum].realreg = REG_UNKNOWN;
+ this_saved_regs[regnum].addr = -1;
+}
+
+void
trad_frame_prev_register (struct frame_info *next_frame,
struct trad_frame_saved_reg this_saved_regs[],
int regnum, int *optimizedp,
enum lval_type *lvalp, CORE_ADDR *addrp,
- int *realnump, void *bufferp)
+ int *realregp, void *bufferp)
{
struct gdbarch *gdbarch = get_frame_arch (next_frame);
- if (this_saved_regs[regnum].realnum >= 0
- && this_saved_regs[regnum].addr != 0)
+ if (trad_frame_addr_p (this_saved_regs, regnum))
{
/* The register was saved in memory. */
*optimizedp = 0;
*lvalp = lval_memory;
*addrp = this_saved_regs[regnum].addr;
- *realnump = -1;
+ *realregp = -1;
if (bufferp != NULL)
{
/* Read the value in from memory. */
@@ -75,22 +109,26 @@ trad_frame_prev_register (struct frame_info *next_frame,
register_size (gdbarch, regnum));
}
}
- else if (this_saved_regs[regnum].realnum >= 0
- && this_saved_regs[regnum].addr == 0)
+ else if (trad_frame_realreg_p (this_saved_regs, regnum))
{
/* As the next frame to return the value of the register. */
- frame_register_unwind (next_frame, this_saved_regs[regnum].realnum,
- optimizedp, lvalp, addrp, realnump, bufferp);
+ frame_register_unwind (next_frame, this_saved_regs[regnum].realreg,
+ optimizedp, lvalp, addrp, realregp, bufferp);
}
- else
+ else if (trad_frame_value_p (this_saved_regs, regnum))
{
/* The register's value is available. */
*optimizedp = 0;
*lvalp = not_lval;
*addrp = 0;
- *realnump = -1;
+ *realregp = -1;
if (bufferp != NULL)
store_unsigned_integer (bufferp, register_size (gdbarch, regnum),
this_saved_regs[regnum].addr);
}
+ else
+ {
+ error ("Register %s not available",
+ gdbarch_register_name (gdbarch, regnum));
+ }
}