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[patch/mips] Have read_next_frame_reg() use unwind
- From: Andrew Cagney <ac131313 at ges dot redhat dot com>
- To: gdb-patches at sources dot redhat dot com
- Date: Fri, 13 Sep 2002 18:14:33 -0400
- Subject: [patch/mips] Have read_next_frame_reg() use unwind
Hello,
This is very similar to the mips_get_saved_reg_patch() and the rationale
for this sideways step is the same as for that one --- it at least makes
it possible for the MIPS target to be switched to generic dummy frames.
committing ....,
Andrew
Fri Sep 13 14:59:55 2002 Andrew Cagney <cagney@redhat.com>
* mips-tdep.c (read_next_frame_reg): Re-hack using
frame_register_unwind.
RCS file: /cvs/src/src/gdb/mips-tdep.c,v
retrieving revision 1.122
diff -u -r1.122 mips-tdep.c
--- mips-tdep.c 13 Sep 2002 17:58:22 -0000 1.122
+++ mips-tdep.c 13 Sep 2002 21:51:11 -0000
@@ -1589,21 +1589,29 @@
static CORE_ADDR
read_next_frame_reg (struct frame_info *fi, int regno)
{
- for (; fi; fi = fi->next)
+ int optimized;
+ CORE_ADDR addr;
+ int realnum;
+ enum lval_type lval;
+ void *raw_buffer = alloca (MAX_REGISTER_RAW_SIZE);
+ frame_register_unwind (fi, regno, &optimized, &lval, &addr, &realnum,
+ raw_buffer);
+ /* FIXME: cagney/2002-09-13: This is just soooo bad. The MIPS
+ should have a pseudo register range that correspons to the ABI's,
+ rather than the ISA's, view of registers. These registers would
+ then implicitly describe their size and hence could be used
+ without the below munging. */
+ if (lval == lval_memory)
{
- /* We have to get the saved sp from the sigcontext
- if it is a signal handler frame. */
- if (regno == SP_REGNUM && !fi->signal_handler_caller)
- return fi->frame;
- else
+ if (regno < 32)
{
- if (fi->saved_regs == NULL)
- FRAME_INIT_SAVED_REGS (fi);
- if (fi->saved_regs[regno])
- return read_memory_integer (ADDR_BITS_REMOVE (fi->saved_regs[regno]), MIPS_SAVED_REGSIZE);
+ /* Only MIPS_SAVED_REGSIZE bytes of GP registers are
+ saved. */
+ return read_memory_integer (addr, MIPS_SAVED_REGSIZE);
}
}
- return read_signed_register (regno);
+
+ return extract_signed_integer (raw_buffer, REGISTER_VIRTUAL_SIZE (regno));
}
/* mips_addr_bits_remove - remove useless address bits */