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[Qemu-devel] [PATCH 3/3] [x86] SYSENTER/SYSEXIT IA-32e implementation
From: |
Alexander Graf |
Subject: |
[Qemu-devel] [PATCH 3/3] [x86] SYSENTER/SYSEXIT IA-32e implementation |
Date: |
Mon, 11 Aug 2008 12:37:16 +0200 |
User-agent: |
Thunderbird 2.0.0.14 (X11/20080421) |
On Intel CPUs, sysenter and sysexit are valid in 64-bit mode. This patch
makes both 64-bit aware and enables them for Intel CPUs.
Signed-off-by: Alexander Graf <address@hidden>
diff --git a/qemu/target-i386/cpu.h b/qemu/target-i386/cpu.h
index 7e95900..3c84dc9 100644
--- a/qemu/target-i386/cpu.h
+++ b/qemu/target-i386/cpu.h
@@ -542,8 +555,8 @@ typedef struct CPUX86State {
/* sysenter registers */
uint32_t sysenter_cs;
- uint32_t sysenter_esp;
- uint32_t sysenter_eip;
+ target_ulong sysenter_esp;
+ target_ulong sysenter_eip;
uint64_t efer;
uint64_t star;
diff --git a/qemu/target-i386/helper.h b/qemu/target-i386/helper.h
index 8df6acc..ffe9ab6 100644
--- a/qemu/target-i386/helper.h
+++ b/qemu/target-i386/helper.h
@@ -55,7 +55,7 @@ DEF_HELPER(void, helper_enter_level, (int level, int data32,
target_ulong t1))
DEF_HELPER(void, helper_enter64_level, (int level, int data64, target_ulong
t1))
#endif
DEF_HELPER(void, helper_sysenter, (void))
-DEF_HELPER(void, helper_sysexit, (void))
+DEF_HELPER(void, helper_sysexit, (int dflag))
#ifdef TARGET_X86_64
DEF_HELPER(void, helper_syscall, (int next_eip_addend))
DEF_HELPER(void, helper_sysret, (int dflag))
diff --git a/qemu/target-i386/op_helper.c b/qemu/target-i386/op_helper.c
index 0b5fdc0..781c1d5 100644
--- a/qemu/target-i386/op_helper.c
+++ b/qemu/target-i386/op_helper.c
@@ -2878,11 +2915,23 @@ void helper_sysenter(void)
}
env->eflags &= ~(VM_MASK | IF_MASK | RF_MASK);
cpu_x86_set_cpl(env, 0);
- cpu_x86_load_seg_cache(env, R_CS, env->sysenter_cs & 0xfffc,
- 0, 0xffffffff,
- DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
- DESC_S_MASK |
- DESC_CS_MASK | DESC_R_MASK | DESC_A_MASK);
+
+#ifdef TARGET_X86_64
+ if (env->hflags & HF_LMA_MASK) {
+ cpu_x86_load_seg_cache(env, R_CS, env->sysenter_cs & 0xfffc,
+ 0, 0xffffffff,
+ DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
+ DESC_S_MASK |
+ DESC_CS_MASK | DESC_R_MASK | DESC_A_MASK |
DESC_L_MASK);
+ } else
+#endif
+ {
+ cpu_x86_load_seg_cache(env, R_CS, env->sysenter_cs & 0xfffc,
+ 0, 0xffffffff,
+ DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
+ DESC_S_MASK |
+ DESC_CS_MASK | DESC_R_MASK | DESC_A_MASK);
+ }
cpu_x86_load_seg_cache(env, R_SS, (env->sysenter_cs + 8) & 0xfffc,
0, 0xffffffff,
DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
@@ -2892,7 +2941,7 @@ void helper_sysenter(void)
EIP = env->sysenter_eip;
}
-void helper_sysexit(void)
+void helper_sysexit(int dflag)
{
int cpl;
@@ -2901,16 +2950,32 @@ void helper_sysexit(void)
raise_exception_err(EXCP0D_GPF, 0);
}
cpu_x86_set_cpl(env, 3);
- cpu_x86_load_seg_cache(env, R_CS, ((env->sysenter_cs + 16) & 0xfffc) | 3,
- 0, 0xffffffff,
- DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
- DESC_S_MASK | (3 << DESC_DPL_SHIFT) |
- DESC_CS_MASK | DESC_R_MASK | DESC_A_MASK);
- cpu_x86_load_seg_cache(env, R_SS, ((env->sysenter_cs + 24) & 0xfffc) | 3,
- 0, 0xffffffff,
- DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
- DESC_S_MASK | (3 << DESC_DPL_SHIFT) |
- DESC_W_MASK | DESC_A_MASK);
+#ifdef TARGET_X86_64
+ if (dflag == 2) {
+ cpu_x86_load_seg_cache(env, R_CS, ((env->sysenter_cs + 32) & 0xfffc) |
3,
+ 0, 0xffffffff,
+ DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
+ DESC_S_MASK | (3 << DESC_DPL_SHIFT) |
+ DESC_CS_MASK | DESC_R_MASK | DESC_A_MASK |
DESC_L_MASK);
+ cpu_x86_load_seg_cache(env, R_SS, ((env->sysenter_cs + 40) & 0xfffc) |
3,
+ 0, 0xffffffff,
+ DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
+ DESC_S_MASK | (3 << DESC_DPL_SHIFT) |
+ DESC_W_MASK | DESC_A_MASK);
+ } else
+#endif
+ {
+ cpu_x86_load_seg_cache(env, R_CS, ((env->sysenter_cs + 16) & 0xfffc) |
3,
+ 0, 0xffffffff,
+ DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
+ DESC_S_MASK | (3 << DESC_DPL_SHIFT) |
+ DESC_CS_MASK | DESC_R_MASK | DESC_A_MASK);
+ cpu_x86_load_seg_cache(env, R_SS, ((env->sysenter_cs + 24) & 0xfffc) |
3,
+ 0, 0xffffffff,
+ DESC_G_MASK | DESC_B_MASK | DESC_P_MASK |
+ DESC_S_MASK | (3 << DESC_DPL_SHIFT) |
+ DESC_W_MASK | DESC_A_MASK);
+ }
ESP = ECX;
EIP = EDX;
#ifdef USE_KQEMU
diff --git a/qemu/target-i386/translate.c b/qemu/target-i386/translate.c
index c4a1195..cf7347e 100644
--- a/qemu/target-i386/translate.c
+++ b/qemu/target-i386/translate.c
@@ -6401,7 +6401,8 @@ static target_ulong disas_insn(DisasContext *s,
target_ulong pc_start)
tcg_gen_helper_0_0(helper_rdpmc);
break;
case 0x134: /* sysenter */
- if (CODE64(s))
+ /* For Intel SYSENTER is valid on 64-bit */
+ if (CODE64(s) && cpu_single_env->cpuid_vendor1 != CPUID_VENDOR_INTEL_1)
goto illegal_op;
if (!s->pe) {
gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
@@ -6416,7 +6417,8 @@ static target_ulong disas_insn(DisasContext *s,
target_ulong pc_start)
}
break;
case 0x135: /* sysexit */
- if (CODE64(s))
+ /* For Intel SYSEXIT is valid on 64-bit */
+ if (CODE64(s) && cpu_single_env->cpuid_vendor1 != CPUID_VENDOR_INTEL_1)
goto illegal_op;
if (!s->pe) {
gen_exception(s, EXCP0D_GPF, pc_start - s->cs_base);
@@ -6426,7 +6428,7 @@ static target_ulong disas_insn(DisasContext *s,
target_ulong pc_start)
s->cc_op = CC_OP_DYNAMIC;
}
gen_jmp_im(pc_start - s->cs_base);
- tcg_gen_helper_0_0(helper_sysexit);
+ tcg_gen_helper_0_1(helper_sysexit, tcg_const_i32(dflag));
gen_eob(s);
}
break;
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