From 26e124f0d78233b1d976bd4b787f6a7866bcb7e7 Mon Sep 17 00:00:00 2001 From: nagaraju 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 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