From cf950fd4dd4581849a445a76b57514d72074927d Mon Sep 17 00:00:00 2001 From: Alan Modra Date: Mon, 16 Dec 2019 09:57:22 +1030 Subject: [PATCH] ubsan: moxie: left shift of negative value Commit 8c9b4171877df didn't remove a glaring left shift of a number that had just been sign extended. * moxie-dis.c (INST2OFFSET): Don't left shift a signed value. (print_insn_moxie): Remove unnecessary cast. --- opcodes/ChangeLog | 5 +++++ opcodes/moxie-dis.c | 5 ++--- 2 files changed, 7 insertions(+), 3 deletions(-) diff --git a/opcodes/ChangeLog b/opcodes/ChangeLog index 9e0d57b7c9..2d1c9d3f7d 100644 --- a/opcodes/ChangeLog +++ b/opcodes/ChangeLog @@ -1,3 +1,8 @@ +2019-12-16 Alan Modra + + * moxie-dis.c (INST2OFFSET): Don't left shift a signed value. + (print_insn_moxie): Remove unnecessary cast. + 2019-12-12 Alan Modra * csky-dis.c (csky_chars_to_number): Remove abort and unnecessary diff --git a/opcodes/moxie-dis.c b/opcodes/moxie-dis.c index cbfcf95880..1d06e18479 100644 --- a/opcodes/moxie-dis.c +++ b/opcodes/moxie-dis.c @@ -33,7 +33,7 @@ static void *stream; /* Macros to extract operands from the instruction word. */ #define OP_A(i) ((i >> 4) & 0xf) #define OP_B(i) (i & 0xf) -#define INST2OFFSET(o) (((((o) & 0x3ff) ^ 0x200) - 0x200) << 1) +#define INST2OFFSET(o) (((((o) & 0x3ff) ^ 0x200) - 0x200) * 2) static const char * reg_names[16] = { "$fp", "$sp", "$r0", "$r1", "$r2", "$r3", "$r4", "$r5", @@ -210,8 +210,7 @@ print_insn_moxie (bfd_vma addr, struct disassemble_info * info) { case MOXIE_F3_PCREL: fpr (stream, "%s\t", opcode->name); - info->print_address_func ((bfd_vma) (addr + INST2OFFSET(iword) + 2), - info); + info->print_address_func (addr + INST2OFFSET (iword) + 2, info); break; case MOXIE_BAD: fpr (stream, "bad"); -- 2.34.1