diff options
| author |   Richard Purdie <richard.purdie@linuxfoundation.org> | 2013-09-30 18:50:59 +0000 |
|---|---|---|
| committer | Richard Purdie <richard.purdie@linuxfoundation.org> | 2013-09-30 22:08:31 +0100 |
| commit | 5dc43cdc08e6698afa16ba79f3506a1555bb3710 (patch) | |
| tree | c90665df9308bb49b51d2636bca2555fbd0ce69a | |
| parent | c7de71813c8f47438f44749136877442cf73d536 (diff) | |
| download | openembedded-core-contrib-5dc43cdc08e6698afa16ba79f3506a1555bb3710.tar.gz | |
qemu: Add fix for floating point issues on x86-64
There was a bug in handling of the mxcsr register since cpu flags
were not getting updated after fxrstor operations. This small tweak
fixes that.
[YOCTO #5248]
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
| -rw-r--r-- | meta/recipes-devtools/qemu/files/fxrstorssefix.patch | 31 | ||||
| -rw-r--r-- | meta/recipes-devtools/qemu/qemu_1.5.0.bb | 1 |
2 files changed, 32 insertions, 0 deletions
diff --git a/meta/recipes-devtools/qemu/files/fxrstorssefix.patch b/meta/recipes-devtools/qemu/files/fxrstorssefix.patch new file mode 100644 index 0000000000..59ab0f50fa --- /dev/null +++ b/meta/recipes-devtools/qemu/files/fxrstorssefix.patch @@ -0,0 +1,31 @@ +When we restore the mxcsr resgister with FXRSTOR, we need to update the various SSE +flag files by calling update_sse_status() else we're using the flags from some other +process with interesting results. + +The code isn't ordered to make this easy hence the function declaration. + +Upstream-Status: Pending + +RP 2013/9/30 + +Index: qemu-1.5.0/target-i386/fpu_helper.c +=================================================================== +--- qemu-1.5.0.orig/target-i386/fpu_helper.c 2013-09-30 18:46:39.283377648 +0000 ++++ qemu-1.5.0/target-i386/fpu_helper.c 2013-09-30 18:46:56.895377232 +0000 +@@ -1149,6 +1149,8 @@ + } + } + ++static void update_sse_status(CPUX86State *env); ++ + void helper_fxrstor(CPUX86State *env, target_ulong ptr, int data64) + { + int i, fpus, fptag, nb_xmm_regs; +@@ -1180,6 +1182,7 @@ + if (env->cr[4] & CR4_OSFXSR_MASK) { + /* XXX: finish it */ + env->mxcsr = cpu_ldl_data(env, ptr + 0x18); ++ update_sse_status(env); + /* cpu_ldl_data(env, ptr + 0x1c); */ + if (env->hflags & HF_CS64_MASK) { + nb_xmm_regs = 16; diff --git a/meta/recipes-devtools/qemu/qemu_1.5.0.bb b/meta/recipes-devtools/qemu/qemu_1.5.0.bb index d6dd743bb0..06c2cdba63 100644 --- a/meta/recipes-devtools/qemu/qemu_1.5.0.bb +++ b/meta/recipes-devtools/qemu/qemu_1.5.0.bb @@ -6,6 +6,7 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=441c28d2cf86e15a37fa47e15a72fbac \ SRC_URI += "file://fdt_header.patch \ file://target-i386-Fix-aflag-logic-for-CODE64-and-the-0x67-.patch \ file://target-ppc_fix_bit_extraction.patch \ + file://fxrstorssefix.patch \ " SRC_URI_prepend = "http://wiki.qemu.org/download/qemu-${PV}.tar.bz2" |