[2/2] winedbg: Add long multiplication and division operators to Thumb2 disassembler
André Hentschel
nerv at dawncrow.de
Sun Jun 10 13:09:10 CDT 2012
---
programs/winedbg/be_arm.c | 52 +++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 52 insertions(+), 0 deletions(-)
diff --git a/programs/winedbg/be_arm.c b/programs/winedbg/be_arm.c
index c5edfd9..866ab61 100644
--- a/programs/winedbg/be_arm.c
+++ b/programs/winedbg/be_arm.c
@@ -631,6 +631,56 @@ static UINT thumb2_disasm_mul(UINT inst, ADDRESS64 *addr)
return inst;
}
+static UINT thumb2_disasm_longmuldiv(UINT inst, ADDRESS64 *addr)
+{
+ WORD op1 = (inst >> 20) & 0x07;
+ WORD op2 = (inst >> 4) & 0x0f;
+
+ if (op2 == 0)
+ {
+ switch (op1)
+ {
+ case 0:
+ dbg_printf("\n\tsmull\t");
+ break;
+ case 2:
+ dbg_printf("\n\tumull\t");
+ break;
+ case 4:
+ dbg_printf("\n\tsmlal\t");
+ break;
+ case 6:
+ dbg_printf("\n\tumlal\t");
+ break;
+ default:
+ return inst;
+ }
+ dbg_printf("%s, %s, %s, %s\t", tbl_regs[get_nibble(inst, 3)], tbl_regs[get_nibble(inst, 2)],
+ tbl_regs[get_nibble(inst, 4)], tbl_regs[get_nibble(inst, 0)]);
+ return 0;
+ }
+
+ if (op2 == 0xffff)
+ {
+ switch (op1)
+ {
+ case 1:
+ dbg_printf("\n\tsdiv\t");
+ break;
+ case 3:
+ dbg_printf("\n\tudiv\t");
+ break;
+ default:
+ return inst;
+ }
+ dbg_printf("%s, %s, %s\t", tbl_regs[get_nibble(inst, 2)], tbl_regs[get_nibble(inst, 4)],
+ tbl_regs[get_nibble(inst, 0)]);
+ return 0;
+ }
+
+ return inst;
+}
+
struct inst_arm
{
UINT mask;
@@ -686,6 +736,8 @@ static const struct inst_arm tbl_thumb32[] = {
{ 0xf800f800, 0xf000f800, thumb2_disasm_branchlinked },
{ 0xffc0f0c0, 0xfa80f080, thumb2_disasm_misc },
{ 0xff8000c0, 0xfb000000, thumb2_disasm_mul },
+ { 0xff8000f0, 0xfb800000, thumb2_disasm_longmuldiv },
+ { 0xff8000f0, 0xfb8000f0, thumb2_disasm_longmuldiv },
{ 0x00000000, 0x00000000, NULL }
};
--
1.7.4.1
--
Best Regards, André Hentschel
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