[2/4] winedbg: Add load non-word operators to Thumb2 disassembler
André Hentschel
nerv at dawncrow.de
Sun Oct 7 10:34:46 CDT 2012
---
programs/winedbg/be_arm.c | 63 +++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 63 insertions(+), 0 deletions(-)
diff --git a/programs/winedbg/be_arm.c b/programs/winedbg/be_arm.c
index a3c5243..3009e70 100644
--- a/programs/winedbg/be_arm.c
+++ b/programs/winedbg/be_arm.c
@@ -992,6 +992,68 @@ static UINT thumb2_disasm_preload(UINT inst, ADDRESS64 *addr)
return inst;
}
+static UINT thumb2_disasm_ldrnonword(UINT inst, ADDRESS64 *addr)
+{
+ WORD op1 = (inst >> 23) & 0x03;
+ WORD hw = (inst >> 21) & 0x01;
+
+ if (!(op1 & 0x01) && !((inst >> 6) & 0x3f) && get_nibble(inst, 4) != 15)
+ {
+ WORD shift = (inst >> 4) & 0x03;
+ dbg_printf("\n\t%s%s\t%s, [%s, %s", op1?"ldrs":"ldr", hw?"h":"b",
+ tbl_regs[get_nibble(inst, 3)], tbl_regs[get_nibble(inst, 4)],
+ tbl_regs[get_nibble(inst, 0)]);
+ if (shift) dbg_printf(", lsl #%u]", shift);
+ else dbg_printf("]");
+ return 0;
+ }
+
+ if (!(op1 & 0x01) && ((inst >> 8) & 0x0f) == 14 && get_nibble(inst, 4) != 15)
+ {
+ WORD offset = inst & 0xff;
+ dbg_printf("\n\t%s%s\t%s, [%s", op1?"ldrs":"ldr", hw?"ht":"bt",
+ tbl_regs[get_nibble(inst, 3)], tbl_regs[get_nibble(inst, 4)]);
+ if (offset) dbg_printf(", #%u]", offset);
+ else dbg_printf("]");
+ return 0;
+ }
+
+ if (get_nibble(inst, 4) != 15)
+ {
+ int offset;
+
+ dbg_printf("\n\t%s%s\t%s, [%s", (op1 & 0x02)?"ldrs":"ldr", hw?"h":"b",
+ tbl_regs[get_nibble(inst, 3)], tbl_regs[get_nibble(inst, 4)]);
+
+ if (op1 & 0x01)
+ {
+ dbg_printf(", #%u]", inst & 0x0fff);
+ return 0;
+ }
+
+ offset = inst & 0xff;
+ if (!(inst & 0x0200)) offset *= -1;
+
+ if (!(inst & 0x0400) && (inst & 0x0100)) dbg_printf("], #%i", offset);
+ else if (inst & 0x0400) dbg_printf(", #%i]%s", offset, (inst & 0x0100)?"!":"");
+ else return inst;
+
+ return 0;
+ }
+
+ if (get_nibble(inst, 4) == 15)
+ {
+ int offset = inst & 0x0fff;
+ if (!op1) offset *= -1;
+ dbg_printf("\n\t%s%s\t%s, ", (op1 & 0x02)?"ldrs":"ldr", hw?"h":"b",
+ tbl_regs[get_nibble(inst, 3)]);
+ db_printsym(addr->Offset + offset + 4);
+ return 0;
+ }
+
+ return inst;
+}
+
static UINT thumb2_disasm_coprocdat(UINT inst, ADDRESS64 *addr)
{
WORD opc2 = (inst >> 5) & 0x07;
@@ -1139,6 +1201,7 @@ static const struct inst_arm tbl_thumb32[] = {
{ 0xff100000, 0xf8000000, thumb2_disasm_str },
{ 0xff700000, 0xf8500000, thumb2_disasm_ldrword },
{ 0xfe70f000, 0xf810f000, thumb2_disasm_preload },
+ { 0xfe500000, 0xf8100000, thumb2_disasm_ldrnonword },
{ 0xef000010, 0xee000000, thumb2_disasm_coprocdat },
{ 0xef000010, 0xee000010, thumb2_disasm_coprocmov1 },
{ 0xefe00000, 0xec400000, thumb2_disasm_coprocmov2 },
--
1.7.4.1
--
Best Regards, André Hentschel
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