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From 26e124f0d78233b1d976bd4b787f6a7866bcb7e7 Mon Sep 17 00:00:00 2001
From: nagaraju <nmekala@xilix.com>
Date: Wed, 4 Jan 2012 16:59:33 +0530
Subject: [PATCH 04/16] [Patch, microblaze]: Communicate in larger blocks with
the target
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
Upstream-Status: Pending
---
gdb/microblaze-tdep.c | 25 ++++++++++++++++++++++---
1 file changed, 22 insertions(+), 3 deletions(-)
diff --git a/gdb/microblaze-tdep.c b/gdb/microblaze-tdep.c
index 36cf1ca..76e87b3 100644
--- a/gdb/microblaze-tdep.c
+++ b/gdb/microblaze-tdep.c
@@ -242,6 +242,10 @@ microblaze_analyze_prologue (struct gdbarch *gdbarch, CORE_ADDR pc,
int flags = 0;
int save_hidden_pointer_found = 0;
int non_stack_instruction_found = 0;
+ int n_insns;
+ unsigned long *insn_block;
+ gdb_byte *buf_block;
+ int ti, tj;
/* Find the start of this function. */
find_pc_partial_function (pc, &name, &func_addr, &func_end);
@@ -281,9 +285,23 @@ microblaze_analyze_prologue (struct gdbarch *gdbarch, CORE_ADDR pc,
name, paddress (gdbarch, func_addr),
paddress (gdbarch, stop));
+/* Do a block read to minimize the transaction with the Debug Agent */
+ n_insns = (stop == func_addr) ? 1 : ((stop - func_addr) / INST_WORD_SIZE);
+ insn_block = (unsigned long *)calloc(n_insns, sizeof(unsigned long));
+ buf_block = (gdb_byte *)calloc(n_insns * INST_WORD_SIZE, sizeof(gdb_byte));
+
+ target_read_memory (func_addr, buf_block, n_insns * INST_WORD_SIZE );
+
+ for(ti = 0; ti < n_insns; ti++){
+ insn_block[ti] = 0;
+ for( tj = ti * INST_WORD_SIZE; tj < (ti + 1) * INST_WORD_SIZE; tj++ )
+ insn_block[ti] = (insn_block[ti] << 8) | buf_block[tj];
+ }
+
for (addr = func_addr; addr < stop; addr += INST_WORD_SIZE)
{
- insn = microblaze_fetch_instruction (addr);
+ //insn = microblaze_fetch_instruction (addr);
+ insn = insn_block[(addr - func_addr) / INST_WORD_SIZE];
op = microblaze_decode_insn (insn, &rd, &ra, &rb, &imm);
microblaze_debug ("%s %08lx\n", paddress (gdbarch, pc), insn);
@@ -409,8 +427,9 @@ microblaze_analyze_prologue (struct gdbarch *gdbarch, CORE_ADDR pc,
part of the prologue. */
if (save_hidden_pointer_found)
prologue_end_addr -= INST_WORD_SIZE;
-
- return prologue_end_addr;
+ free(insn_block);
+ free(buf_block);
+ return prologue_end_addr;
}
static CORE_ADDR
--
1.9.0
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