diff options
Diffstat (limited to 'emulators/qemu/patches/patch-target-i386_helper.h')
| -rw-r--r-- | emulators/qemu/patches/patch-target-i386_helper.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/emulators/qemu/patches/patch-target-i386_helper.h b/emulators/qemu/patches/patch-target-i386_helper.h new file mode 100644 index 00000000000..9c0396aaa72 --- /dev/null +++ b/emulators/qemu/patches/patch-target-i386_helper.h @@ -0,0 +1,25 @@ +$NetBSD: patch-target-i386_helper.h,v 1.1 2017/03/04 15:11:11 spz Exp $ + +from upstream: + commit c52ab08aee6f7d4717fc6b517174043126bd302f + Author: Doug Evans <dje@google.com> + Date: Tue Dec 6 23:06:30 2016 +0000 + + target-i386: Fix eflags.TF/#DB handling of syscall/sysret insns + + The syscall and sysret instructions behave a bit differently: + TF is checked after the instruction completes. + This allows the o/s to disable #DB at a syscall by adding TF to FMASK. + And then when the sysret is executed the #DB is taken "as if" the + syscall insn just completed. + +--- target-i386/helper.h.orig 2016-12-20 20:16:50.000000000 +0000 ++++ target-i386/helper.h 2017-03-03 04:41:00.000000000 +0000 +@@ -79,6 +79,7 @@ DEF_HELPER_2(cmpxchg16b_unlocked, void, + DEF_HELPER_2(cmpxchg16b, void, env, tl) + #endif + DEF_HELPER_1(single_step, void, env) ++DEF_HELPER_1(rechecking_single_step, void, env) + DEF_HELPER_1(cpuid, void, env) + DEF_HELPER_1(rdtsc, void, env) + DEF_HELPER_1(rdtscp, void, env) |