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authorJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-05-18 13:18:31 +0300
committerJosé Pekkarinen <jose.pekkarinen@nokia.com>2016-05-18 13:42:15 +0300
commit437fd90c0250dee670290f9b714253671a990160 (patch)
treeb871786c360704244a07411c69fb58da9ead4a06 /qemu/target-i386/int_helper.c
parent5bbd6fe9b8bab2a93e548c5a53b032d1939eec05 (diff)
These changes are the raw update to qemu-2.6.
Collission happened in the following patches: migration: do cleanup operation after completion(738df5b9) Bug fix.(1750c932f86) kvmclock: add a new function to update env->tsc.(b52baab2) The code provided by the patches was already in the upstreamed version. Change-Id: I3cc11841a6a76ae20887b2e245710199e1ea7f9a Signed-off-by: José Pekkarinen <jose.pekkarinen@nokia.com>
Diffstat (limited to 'qemu/target-i386/int_helper.c')
-rw-r--r--qemu/target-i386/int_helper.c43
1 files changed, 27 insertions, 16 deletions
diff --git a/qemu/target-i386/int_helper.c b/qemu/target-i386/int_helper.c
index b0d78e6ee..cf5bbb048 100644
--- a/qemu/target-i386/int_helper.c
+++ b/qemu/target-i386/int_helper.c
@@ -17,6 +17,7 @@
* License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
+#include "qemu/osdep.h"
#include "cpu.h"
#include "qemu/host-utils.h"
#include "exec/helper-proto.h"
@@ -48,11 +49,11 @@ void helper_divb_AL(CPUX86State *env, target_ulong t0)
num = (env->regs[R_EAX] & 0xffff);
den = (t0 & 0xff);
if (den == 0) {
- raise_exception(env, EXCP00_DIVZ);
+ raise_exception_ra(env, EXCP00_DIVZ, GETPC());
}
q = (num / den);
if (q > 0xff) {
- raise_exception(env, EXCP00_DIVZ);
+ raise_exception_ra(env, EXCP00_DIVZ, GETPC());
}
q &= 0xff;
r = (num % den) & 0xff;
@@ -66,11 +67,11 @@ void helper_idivb_AL(CPUX86State *env, target_ulong t0)
num = (int16_t)env->regs[R_EAX];
den = (int8_t)t0;
if (den == 0) {
- raise_exception(env, EXCP00_DIVZ);
+ raise_exception_ra(env, EXCP00_DIVZ, GETPC());
}
q = (num / den);
if (q != (int8_t)q) {
- raise_exception(env, EXCP00_DIVZ);
+ raise_exception_ra(env, EXCP00_DIVZ, GETPC());
}
q &= 0xff;
r = (num % den) & 0xff;
@@ -84,11 +85,11 @@ void helper_divw_AX(CPUX86State *env, target_ulong t0)
num = (env->regs[R_EAX] & 0xffff) | ((env->regs[R_EDX] & 0xffff) << 16);
den = (t0 & 0xffff);
if (den == 0) {
- raise_exception(env, EXCP00_DIVZ);
+ raise_exception_ra(env, EXCP00_DIVZ, GETPC());
}
q = (num / den);
if (q > 0xffff) {
- raise_exception(env, EXCP00_DIVZ);
+ raise_exception_ra(env, EXCP00_DIVZ, GETPC());
}
q &= 0xffff;
r = (num % den) & 0xffff;
@@ -103,11 +104,11 @@ void helper_idivw_AX(CPUX86State *env, target_ulong t0)
num = (env->regs[R_EAX] & 0xffff) | ((env->regs[R_EDX] & 0xffff) << 16);
den = (int16_t)t0;
if (den == 0) {
- raise_exception(env, EXCP00_DIVZ);
+ raise_exception_ra(env, EXCP00_DIVZ, GETPC());
}
q = (num / den);
if (q != (int16_t)q) {
- raise_exception(env, EXCP00_DIVZ);
+ raise_exception_ra(env, EXCP00_DIVZ, GETPC());
}
q &= 0xffff;
r = (num % den) & 0xffff;
@@ -123,12 +124,12 @@ void helper_divl_EAX(CPUX86State *env, target_ulong t0)
num = ((uint32_t)env->regs[R_EAX]) | ((uint64_t)((uint32_t)env->regs[R_EDX]) << 32);
den = t0;
if (den == 0) {
- raise_exception(env, EXCP00_DIVZ);
+ raise_exception_ra(env, EXCP00_DIVZ, GETPC());
}
q = (num / den);
r = (num % den);
if (q > 0xffffffff) {
- raise_exception(env, EXCP00_DIVZ);
+ raise_exception_ra(env, EXCP00_DIVZ, GETPC());
}
env->regs[R_EAX] = (uint32_t)q;
env->regs[R_EDX] = (uint32_t)r;
@@ -142,12 +143,12 @@ void helper_idivl_EAX(CPUX86State *env, target_ulong t0)
num = ((uint32_t)env->regs[R_EAX]) | ((uint64_t)((uint32_t)env->regs[R_EDX]) << 32);
den = t0;
if (den == 0) {
- raise_exception(env, EXCP00_DIVZ);
+ raise_exception_ra(env, EXCP00_DIVZ, GETPC());
}
q = (num / den);
r = (num % den);
if (q != (int32_t)q) {
- raise_exception(env, EXCP00_DIVZ);
+ raise_exception_ra(env, EXCP00_DIVZ, GETPC());
}
env->regs[R_EAX] = (uint32_t)q;
env->regs[R_EDX] = (uint32_t)r;
@@ -379,12 +380,12 @@ void helper_divq_EAX(CPUX86State *env, target_ulong t0)
uint64_t r0, r1;
if (t0 == 0) {
- raise_exception(env, EXCP00_DIVZ);
+ raise_exception_ra(env, EXCP00_DIVZ, GETPC());
}
r0 = env->regs[R_EAX];
r1 = env->regs[R_EDX];
if (div64(&r0, &r1, t0)) {
- raise_exception(env, EXCP00_DIVZ);
+ raise_exception_ra(env, EXCP00_DIVZ, GETPC());
}
env->regs[R_EAX] = r0;
env->regs[R_EDX] = r1;
@@ -395,12 +396,12 @@ void helper_idivq_EAX(CPUX86State *env, target_ulong t0)
uint64_t r0, r1;
if (t0 == 0) {
- raise_exception(env, EXCP00_DIVZ);
+ raise_exception_ra(env, EXCP00_DIVZ, GETPC());
}
r0 = env->regs[R_EAX];
r1 = env->regs[R_EDX];
if (idiv64(&r0, &r1, t0)) {
- raise_exception(env, EXCP00_DIVZ);
+ raise_exception_ra(env, EXCP00_DIVZ, GETPC());
}
env->regs[R_EAX] = r0;
env->regs[R_EDX] = r1;
@@ -469,3 +470,13 @@ target_ulong helper_pext(target_ulong src, target_ulong mask)
#include "shift_helper_template.h"
#undef SHIFT
#endif
+
+/* Test that BIT is enabled in CR4. If not, raise an illegal opcode
+ exception. This reduces the requirements for rare CR4 bits being
+ mapped into HFLAGS. */
+void helper_cr4_testbit(CPUX86State *env, uint32_t bit)
+{
+ if (unlikely((env->cr[4] & bit) == 0)) {
+ raise_exception_ra(env, EXCP06_ILLOP, GETPC());
+ }
+}