From 28cd87675de5235b80968bcbb27c7c7888fd7562 Mon Sep 17 00:00:00 2001 From: Jerome Guitton Date: Thu, 25 Sep 2003 14:21:00 +0000 Subject: [PATCH] * arm-tdep.c (arm_skip_prologue): Handle "sub ip, sp #n" and "add ip, sp #n" in the prologue. (arm_scan_prologue): Ditto. --- gdb/ChangeLog | 6 ++++++ gdb/arm-tdep.c | 29 ++++++++++++++++++++++++++--- 2 files changed, 32 insertions(+), 3 deletions(-) diff --git a/gdb/ChangeLog b/gdb/ChangeLog index 3d52955a8f..216635b1f1 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,3 +1,9 @@ +2003-09-25 Jerome Guitton + + * arm-tdep.c (arm_skip_prologue): Handle "sub ip, sp #n" and + "add ip, sp #n" in the prologue. + (arm_scan_prologue): Ditto. + 2003-09-25 Jerome Guitton * MAINTAINERS (write after approval): Add myself. diff --git a/gdb/arm-tdep.c b/gdb/arm-tdep.c index 3ba072d1ff..85e8258e6d 100644 --- a/gdb/arm-tdep.c +++ b/gdb/arm-tdep.c @@ -455,6 +455,12 @@ arm_skip_prologue (CORE_ADDR pc) if (inst == 0xe1a0c00d) /* mov ip, sp */ continue; + if ((inst & 0xfffff000) == 0xe28dc000) /* add ip, sp #n */ + continue; + + if ((inst & 0xfffff000) == 0xe24dc000) /* sub ip, sp #n */ + continue; + /* Some prologues begin with "str lr, [sp, #-4]!". */ if (inst == 0xe52de004) /* str lr, [sp, #-4]! */ continue; @@ -707,7 +713,7 @@ thumb_scan_prologue (CORE_ADDR prev_pc, struct arm_prologue_cache *cache) static void arm_scan_prologue (struct frame_info *next_frame, struct arm_prologue_cache *cache) { - int regno, sp_offset, fp_offset; + int regno, sp_offset, fp_offset, ip_offset; CORE_ADDR prologue_start, prologue_end, current_pc; CORE_ADDR prev_pc = frame_pc_unwind (next_frame); @@ -808,7 +814,7 @@ arm_scan_prologue (struct frame_info *next_frame, struct arm_prologue_cache *cac in which case it is often (but not always) replaced by "str lr, [sp, #-4]!". - Michael Snyder, 2002-04-23] */ - sp_offset = fp_offset = 0; + sp_offset = fp_offset = ip_offset = 0; for (current_pc = prologue_start; current_pc < prologue_end; @@ -818,6 +824,23 @@ arm_scan_prologue (struct frame_info *next_frame, struct arm_prologue_cache *cac if (insn == 0xe1a0c00d) /* mov ip, sp */ { + ip_offset = 0; + continue; + } + else if ((insn & 0xfffff000) == 0xe28dc000) /* add ip, sp #n */ + { + unsigned imm = insn & 0xff; /* immediate value */ + unsigned rot = (insn & 0xf00) >> 7; /* rotate amount */ + imm = (imm >> rot) | (imm << (32 - rot)); + ip_offset = imm; + continue; + } + else if ((insn & 0xfffff000) == 0xe24dc000) /* sub ip, sp #n */ + { + unsigned imm = insn & 0xff; /* immediate value */ + unsigned rot = (insn & 0xf00) >> 7; /* rotate amount */ + imm = (imm >> rot) | (imm << (32 - rot)); + ip_offset = -imm; continue; } else if (insn == 0xe52de004) /* str lr, [sp, #-4]! */ @@ -859,7 +882,7 @@ arm_scan_prologue (struct frame_info *next_frame, struct arm_prologue_cache *cac unsigned imm = insn & 0xff; /* immediate value */ unsigned rot = (insn & 0xf00) >> 7; /* rotate amount */ imm = (imm >> rot) | (imm << (32 - rot)); - fp_offset = -imm; + fp_offset = -imm + ip_offset; cache->framereg = ARM_FP_REGNUM; } else if ((insn & 0xfffff000) == 0xe24dd000) /* sub sp, sp #n */