From: Richard Henderson <richard.hender...@linaro.org> Failure to set pc_succ_insn may result in a TB covering zero bytes, which triggers an assert within the code generator.
Cc: qemu-sta...@nongnu.org Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1224 Signed-off-by: Richard Henderson <richard.hender...@linaro.org> Reviewed-by: Alistair Francis <alistair.fran...@wdc.com> Reviewed-by: Philippe Mathieu-Daudé <phi...@linaro.org> Message-Id: <20221203175744.151365-1-richard.hender...@linaro.org> [ Changes by AF: - Add missing run-plugin-test-noc-% line ] Signed-off-by: Alistair Francis <alistair.fran...@wdc.com> --- target/riscv/translate.c | 12 ++++-------- tests/tcg/Makefile.target | 2 ++ tests/tcg/riscv64/Makefile.target | 6 ++++++ tests/tcg/riscv64/test-noc.S | 32 +++++++++++++++++++++++++++++++ 4 files changed, 44 insertions(+), 8 deletions(-) create mode 100644 tests/tcg/riscv64/test-noc.S diff --git a/target/riscv/translate.c b/target/riscv/translate.c index cd5eb25ee8..160aefc3df 100644 --- a/target/riscv/translate.c +++ b/target/riscv/translate.c @@ -1096,14 +1096,10 @@ static void decode_opc(CPURISCVState *env, DisasContext *ctx, uint16_t opcode) ctx->virt_inst_excp = false; /* Check for compressed insn */ if (insn_len(opcode) == 2) { - if (!has_ext(ctx, RVC)) { - gen_exception_illegal(ctx); - } else { - ctx->opcode = opcode; - ctx->pc_succ_insn = ctx->base.pc_next + 2; - if (decode_insn16(ctx, opcode)) { - return; - } + ctx->opcode = opcode; + ctx->pc_succ_insn = ctx->base.pc_next + 2; + if (has_ext(ctx, RVC) && decode_insn16(ctx, opcode)) { + return; } } else { uint32_t opcode32 = opcode; diff --git a/tests/tcg/Makefile.target b/tests/tcg/Makefile.target index 75257f2b29..14bc013181 100644 --- a/tests/tcg/Makefile.target +++ b/tests/tcg/Makefile.target @@ -117,6 +117,8 @@ endif %: %.c $(CC) $(CFLAGS) $(EXTRA_CFLAGS) $< -o $@ $(LDFLAGS) +%: %.S + $(CC) $(CFLAGS) $(EXTRA_CFLAGS) $< -o $@ $(LDFLAGS) else # For softmmu targets we include a different Makefile fragement as the # build options for bare programs are usually pretty different. They diff --git a/tests/tcg/riscv64/Makefile.target b/tests/tcg/riscv64/Makefile.target index b5b89dfb0e..cc3ed65ffd 100644 --- a/tests/tcg/riscv64/Makefile.target +++ b/tests/tcg/riscv64/Makefile.target @@ -4,3 +4,9 @@ VPATH += $(SRC_PATH)/tests/tcg/riscv64 TESTS += test-div TESTS += noexec + +# Disable compressed instructions for test-noc +TESTS += test-noc +test-noc: LDFLAGS = -nostdlib -static +run-test-noc: QEMU_OPTS += -cpu rv64,c=false +run-plugin-test-noc-%: QEMU_OPTS += -cpu rv64,c=false diff --git a/tests/tcg/riscv64/test-noc.S b/tests/tcg/riscv64/test-noc.S new file mode 100644 index 0000000000..e29d60c8b3 --- /dev/null +++ b/tests/tcg/riscv64/test-noc.S @@ -0,0 +1,32 @@ +#include <asm/unistd.h> + + .text + .globl _start +_start: + .option norvc + li a0, 4 /* SIGILL */ + la a1, sa + li a2, 0 + li a3, 8 + li a7, __NR_rt_sigaction + scall + + .option rvc + li a0, 1 + j exit + .option norvc + +pass: + li a0, 0 +exit: + li a7, __NR_exit + scall + + .data + /* struct kernel_sigaction sa = { .sa_handler = pass }; */ + .type sa, @object + .size sa, 32 +sa: + .dword pass + .zero 24 + -- 2.38.1
