** Attachment added: "qemu gcc 4.6.1 bug.pdf" https://bugs.launchpad.net/bugs/944753/+attachment/2800876/+files/qemu%20gcc%204.6.1%20bug.pdf
-- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/944753 Title: ARM: CORTEX M, PRIMASK and FAULTMASK are misplaced, WINDOWS mingw 4.6.1 bug Status in QEMU: New Bug description: Just want to warn anyone who hacks QEMU cortex M support under MinGW, it seems there is a bug in gcc 4.6.1 that compiles this peace of code wrong. translate.c: if (IS_M(env)) { tmp = tcg_const_i32((insn & (1 << 4)) != 0); /* PRIMASK */ if (insn & 2) { addr = tcg_const_i32(16); gen_helper_v7m_msr(cpu_env, addr, tmp); tcg_temp_free_i32(addr); } /* FAULTMASK */ if (insn & 1) { addr = tcg_const_i32(17); gen_helper_v7m_msr(cpu_env, addr, tmp); tcg_temp_free_i32(addr); } tcg_temp_free_i32(tmp); gen_lookup_tb(s); if we just switch conditions order it will compile OK if (IS_M(env)) { tmp = tcg_const_i32((insn & (1 << 4)) != 0); /* FAULTMASK */ if (insn & 1) { addr = tcg_const_i32(17); gen_helper_v7m_msr(cpu_env, addr, tmp); tcg_temp_free_i32(addr); } /* PRIMASK */ if (insn & 2) { addr = tcg_const_i32(16); gen_helper_v7m_msr(cpu_env, addr, tmp); tcg_temp_free_i32(addr); } tcg_temp_free_i32(tmp); gen_lookup_tb(s); I have attached gdb disassembly in the attachment for both cases To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/944753/+subscriptions
