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[174.21.84.25]) by smtp.gmail.com with ESMTPSA id d24sm16257400pfn.54.2021.02.28.15.23.27 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 28 Feb 2021 15:23:28 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=PE0gONUgFUTslg2sgwOR+ancA+fjobnB/g6thC/v3Pc=; b=TwpxD/N2n8QZgvzAwqji763qycaXWiAjzAR/QJL38Ni/Gv2CtoCd5/dHH0CCeS/C3x ipH/nMUpEhNEP05DBYO3LQOcdxKDg5RGb2Ya89aSHka7H1+JQhrRrwbVf1bQ6zcXv68G T99aPgd00X0d6zxjtidDuVm7EGvhWQ2ikauyBJ9mzhzX2lMD5k+0EK4opyCs0+wp7ZrQ QaqzsLzKT/n60ztrbNDJxyl7UMr4wisAJJeUHzDM5no5K9kv5m89k3sHUOSwE5tsgP4/ M2YQf0pUDLOrp9G+tDiWEZfq0LXjI/FrBQYmW0jMPuPO0VDp034ZG1dW8UcUEnecLWlW 6BGA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=PE0gONUgFUTslg2sgwOR+ancA+fjobnB/g6thC/v3Pc=; b=e9ffMN79mojlCDMZun1EDTXjUH9j2sIsZcTqkiZ/CyxONvr/SbqrpZ4rt9MnPB0ebL ma+lgRtYNlquIM80Ysp+GXc0Kd1RVhR6ZuRD/HliiXeSt/icuq5uTTv95jM5Is9DDdER OfXoPvKNL9uxILDSteCcRfKup5t04bYcDoWbkz30wRGP0n/HgxOO1jxGr4Ghqs1CZve+ Nke5+OwOm1UVM3cA+AFzkhi5U72BZzoky2j4CmUN0Ryo5QbZTVOaG3MS3pzA0XreZpr9 Gjw2312vTJKCSebGCAGS/RhlvvL85MRxFK+jqZThEo9Klw2BrU8gt8/Ediauf6maxvzW Hyug== X-Gm-Message-State: AOAM533ruvacrdecK3ROvcGPwqp/WHkSBAdApO6U25VspGy6OJ0SrE0Q 8Iv/l13UeiX8kYhYM9PtCDyZyNkQmOqCpw== X-Google-Smtp-Source: ABdhPJx3b/s1DImTgfpX/Wxf6WNG72VbOz+xYkRIwMOVgpz2P5H2kRKxkk18RXER9aM5/ETqBuxBOQ== X-Received: by 2002:a17:90a:7309:: with SMTP id m9mr14266921pjk.23.1614554608592; Sun, 28 Feb 2021 15:23:28 -0800 (PST) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH 06/50] target/i386: Assert PE is set for user-only Date: Sun, 28 Feb 2021 15:22:37 -0800 Message-Id: <20210228232321.322053-7-richard.henderson@linaro.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210228232321.322053-1-richard.henderson@linaro.org> References: <20210228232321.322053-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::1036; envelope-from=richard.henderson@linaro.org; helo=mail-pj1-x1036.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: cfontana@suse.de Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @linaro.org) Content-Type: text/plain; charset="utf-8" A user-mode executable is never in real-mode. Since we're adding an accessor macro, pull the value directly out of flags for sysemu. Signed-off-by: Richard Henderson --- target/i386/tcg/translate.c | 69 +++++++++++++++++++------------------ 1 file changed, 36 insertions(+), 33 deletions(-) diff --git a/target/i386/tcg/translate.c b/target/i386/tcg/translate.c index 176c95c02b..8477797798 100644 --- a/target/i386/tcg/translate.c +++ b/target/i386/tcg/translate.c @@ -94,7 +94,6 @@ typedef struct DisasContext { target_ulong pc; /* pc =3D eip + cs_base */ /* current block context */ target_ulong cs_base; /* base of CS segment */ - int pe; /* protected mode */ int code32; /* 32 bit code segment */ #ifdef TARGET_X86_64 int lma; /* long mode active */ @@ -146,6 +145,13 @@ typedef struct DisasContext { sigjmp_buf jmpbuf; } DisasContext; =20 +/* The environment in which user-only runs is constrained. */ +#ifdef CONFIG_USER_ONLY +#define PE(S) true +#else +#define PE(S) (((S)->flags & HF_PE_MASK) !=3D 0) +#endif + static void gen_eob(DisasContext *s); static void gen_jr(DisasContext *s, TCGv dest); static void gen_jmp(DisasContext *s, target_ulong eip); @@ -617,7 +623,7 @@ static void gen_check_io(DisasContext *s, MemOp ot, tar= get_ulong cur_eip, { target_ulong next_eip; =20 - if (s->pe && (s->cpl > s->iopl || s->vm86)) { + if (PE(s) && (s->cpl > s->iopl || s->vm86)) { tcg_gen_trunc_tl_i32(s->tmp2_i32, s->T0); switch (ot) { case MO_8: @@ -2345,7 +2351,7 @@ static inline void gen_op_movl_seg_T0_vm(DisasContext= *s, X86Seg seg_reg) call this function with seg_reg =3D=3D R_CS */ static void gen_movl_seg_T0(DisasContext *s, X86Seg seg_reg) { - if (s->pe && !s->vm86) { + if (PE(s) && !s->vm86) { tcg_gen_trunc_tl_i32(s->tmp2_i32, s->T0); gen_helper_load_seg(cpu_env, tcg_const_i32(seg_reg), s->tmp2_i32); /* abort translation because the addseg value may change or @@ -5105,7 +5111,7 @@ static target_ulong disas_insn(DisasContext *s, CPUSt= ate *cpu) gen_add_A0_im(s, 1 << ot); gen_op_ld_v(s, MO_16, s->T0, s->A0); do_lcall: - if (s->pe && !s->vm86) { + if (PE(s) && !s->vm86) { tcg_gen_trunc_tl_i32(s->tmp2_i32, s->T0); gen_helper_lcall_protected(cpu_env, s->tmp2_i32, s->T1, tcg_const_i32(dflag - 1), @@ -5132,7 +5138,7 @@ static target_ulong disas_insn(DisasContext *s, CPUSt= ate *cpu) gen_add_A0_im(s, 1 << ot); gen_op_ld_v(s, MO_16, s->T0, s->A0); do_ljmp: - if (s->pe && !s->vm86) { + if (PE(s) && !s->vm86) { tcg_gen_trunc_tl_i32(s->tmp2_i32, s->T0); gen_helper_ljmp_protected(cpu_env, s->tmp2_i32, s->T1, tcg_const_tl(s->pc - s->cs_base)= ); @@ -6565,7 +6571,7 @@ static target_ulong disas_insn(DisasContext *s, CPUSt= ate *cpu) case 0xca: /* lret im */ val =3D x86_ldsw_code(env, s); do_lret: - if (s->pe && !s->vm86) { + if (PE(s) && !s->vm86) { gen_update_cc_op(s); gen_jmp_im(s, pc_start - s->cs_base); gen_helper_lret_protected(cpu_env, tcg_const_i32(dflag - 1), @@ -6591,7 +6597,7 @@ static target_ulong disas_insn(DisasContext *s, CPUSt= ate *cpu) goto do_lret; case 0xcf: /* iret */ gen_svm_check_intercept(s, pc_start, SVM_EXIT_IRET); - if (!s->pe || s->vm86) { + if (!PE(s) || s->vm86) { /* real mode or vm86 mode */ if (!check_vm86_iopl(s)) { break; @@ -7230,7 +7236,7 @@ static target_ulong disas_insn(DisasContext *s, CPUSt= ate *cpu) /* For Intel SYSENTER is valid on 64-bit */ if (CODE64(s) && env->cpuid_vendor1 !=3D CPUID_VENDOR_INTEL_1) goto illegal_op; - if (!s->pe) { + if (!PE(s)) { gen_exception_gpf(s); } else { gen_helper_sysenter(cpu_env); @@ -7241,7 +7247,7 @@ static target_ulong disas_insn(DisasContext *s, CPUSt= ate *cpu) /* For Intel SYSEXIT is valid on 64-bit */ if (CODE64(s) && env->cpuid_vendor1 !=3D CPUID_VENDOR_INTEL_1) goto illegal_op; - if (!s->pe) { + if (!PE(s)) { gen_exception_gpf(s); } else { gen_helper_sysexit(cpu_env, tcg_const_i32(dflag - 1)); @@ -7260,7 +7266,7 @@ static target_ulong disas_insn(DisasContext *s, CPUSt= ate *cpu) gen_eob_worker(s, false, true); break; case 0x107: /* sysret */ - if (!s->pe) { + if (!PE(s)) { gen_exception_gpf(s); } else { gen_helper_sysret(cpu_env, tcg_const_i32(dflag - 1)); @@ -7295,7 +7301,7 @@ static target_ulong disas_insn(DisasContext *s, CPUSt= ate *cpu) op =3D (modrm >> 3) & 7; switch(op) { case 0: /* sldt */ - if (!s->pe || s->vm86) + if (!PE(s) || s->vm86) goto illegal_op; gen_svm_check_intercept(s, pc_start, SVM_EXIT_LDTR_READ); tcg_gen_ld32u_tl(s->T0, cpu_env, @@ -7304,7 +7310,7 @@ static target_ulong disas_insn(DisasContext *s, CPUSt= ate *cpu) gen_ldst_modrm(env, s, modrm, ot, OR_TMP0, 1); break; case 2: /* lldt */ - if (!s->pe || s->vm86) + if (!PE(s) || s->vm86) goto illegal_op; if (check_cpl0(s)) { gen_svm_check_intercept(s, pc_start, SVM_EXIT_LDTR_WRITE); @@ -7314,7 +7320,7 @@ static target_ulong disas_insn(DisasContext *s, CPUSt= ate *cpu) } break; case 1: /* str */ - if (!s->pe || s->vm86) + if (!PE(s) || s->vm86) goto illegal_op; gen_svm_check_intercept(s, pc_start, SVM_EXIT_TR_READ); tcg_gen_ld32u_tl(s->T0, cpu_env, @@ -7323,7 +7329,7 @@ static target_ulong disas_insn(DisasContext *s, CPUSt= ate *cpu) gen_ldst_modrm(env, s, modrm, ot, OR_TMP0, 1); break; case 3: /* ltr */ - if (!s->pe || s->vm86) + if (!PE(s) || s->vm86) goto illegal_op; if (check_cpl0(s)) { gen_svm_check_intercept(s, pc_start, SVM_EXIT_TR_WRITE); @@ -7334,7 +7340,7 @@ static target_ulong disas_insn(DisasContext *s, CPUSt= ate *cpu) break; case 4: /* verr */ case 5: /* verw */ - if (!s->pe || s->vm86) + if (!PE(s) || s->vm86) goto illegal_op; gen_ldst_modrm(env, s, modrm, MO_16, OR_TMP0, 0); gen_update_cc_op(s); @@ -7452,7 +7458,7 @@ static target_ulong disas_insn(DisasContext *s, CPUSt= ate *cpu) break; =20 case 0xd8: /* VMRUN */ - if (!(s->flags & HF_SVME_MASK) || !s->pe) { + if (!(s->flags & HF_SVME_MASK) || !PE(s)) { goto illegal_op; } if (!check_cpl0(s)) { @@ -7476,7 +7482,7 @@ static target_ulong disas_insn(DisasContext *s, CPUSt= ate *cpu) break; =20 case 0xda: /* VMLOAD */ - if (!(s->flags & HF_SVME_MASK) || !s->pe) { + if (!(s->flags & HF_SVME_MASK) || !PE(s)) { goto illegal_op; } if (!check_cpl0(s)) { @@ -7488,7 +7494,7 @@ static target_ulong disas_insn(DisasContext *s, CPUSt= ate *cpu) break; =20 case 0xdb: /* VMSAVE */ - if (!(s->flags & HF_SVME_MASK) || !s->pe) { + if (!(s->flags & HF_SVME_MASK) || !PE(s)) { goto illegal_op; } if (!check_cpl0(s)) { @@ -7502,7 +7508,7 @@ static target_ulong disas_insn(DisasContext *s, CPUSt= ate *cpu) case 0xdc: /* STGI */ if ((!(s->flags & HF_SVME_MASK) && !(s->cpuid_ext3_features & CPUID_EXT3_SKINIT)) - || !s->pe) { + || !PE(s)) { goto illegal_op; } if (!check_cpl0(s)) { @@ -7515,7 +7521,7 @@ static target_ulong disas_insn(DisasContext *s, CPUSt= ate *cpu) break; =20 case 0xdd: /* CLGI */ - if (!(s->flags & HF_SVME_MASK) || !s->pe) { + if (!(s->flags & HF_SVME_MASK) || !PE(s)) { goto illegal_op; } if (!check_cpl0(s)) { @@ -7529,7 +7535,7 @@ static target_ulong disas_insn(DisasContext *s, CPUSt= ate *cpu) case 0xde: /* SKINIT */ if ((!(s->flags & HF_SVME_MASK) && !(s->cpuid_ext3_features & CPUID_EXT3_SKINIT)) - || !s->pe) { + || !PE(s)) { goto illegal_op; } gen_update_cc_op(s); @@ -7538,7 +7544,7 @@ static target_ulong disas_insn(DisasContext *s, CPUSt= ate *cpu) break; =20 case 0xdf: /* INVLPGA */ - if (!(s->flags & HF_SVME_MASK) || !s->pe) { + if (!(s->flags & HF_SVME_MASK) || !PE(s)) { goto illegal_op; } if (!check_cpl0(s)) { @@ -7705,7 +7711,7 @@ static target_ulong disas_insn(DisasContext *s, CPUSt= ate *cpu) TCGLabel *label1; TCGv t0, t1, t2, a0; =20 - if (!s->pe || s->vm86) + if (!PE(s) || s->vm86) goto illegal_op; t0 =3D tcg_temp_local_new(); t1 =3D tcg_temp_local_new(); @@ -7753,7 +7759,7 @@ static target_ulong disas_insn(DisasContext *s, CPUSt= ate *cpu) { TCGLabel *label1; TCGv t0; - if (!s->pe || s->vm86) + if (!PE(s) || s->vm86) goto illegal_op; ot =3D dflag !=3D MO_16 ? MO_32 : MO_16; modrm =3D x86_ldub_code(env, s); @@ -8455,9 +8461,13 @@ static void i386_tr_init_disas_context(DisasContextB= ase *dcbase, CPUState *cpu) DisasContext *dc =3D container_of(dcbase, DisasContext, base); CPUX86State *env =3D cpu->env_ptr; uint32_t flags =3D dc->base.tb->flags; - target_ulong cs_base =3D dc->base.tb->cs_base; =20 - dc->pe =3D (flags >> HF_PE_SHIFT) & 1; + dc->cs_base =3D dc->base.tb->cs_base; + dc->flags =3D flags; + + /* We make some simplifying assumptions; validate they're correct. */ + g_assert(PE(dc) =3D=3D ((flags & HF_PE_MASK) !=3D 0)); + dc->code32 =3D (flags >> HF_CS32_SHIFT) & 1; dc->ss32 =3D (flags >> HF_SS32_SHIFT) & 1; dc->addseg =3D (flags >> HF_ADDSEG_SHIFT) & 1; @@ -8468,7 +8478,6 @@ static void i386_tr_init_disas_context(DisasContextBa= se *dcbase, CPUState *cpu) dc->tf =3D (flags >> TF_SHIFT) & 1; dc->cc_op =3D CC_OP_DYNAMIC; dc->cc_op_dirty =3D false; - dc->cs_base =3D cs_base; dc->popl_esp_hack =3D 0; /* select memory access functions */ dc->mem_index =3D 0; @@ -8485,7 +8494,6 @@ static void i386_tr_init_disas_context(DisasContextBa= se *dcbase, CPUState *cpu) dc->lma =3D (flags >> HF_LMA_SHIFT) & 1; dc->code64 =3D (flags >> HF_CS64_SHIFT) & 1; #endif - dc->flags =3D flags; dc->jmp_opt =3D !(dc->tf || dc->base.singlestep_enabled || (flags & HF_INHIBIT_IRQ_MASK)); /* Do not optimize repz jumps at all in icount mode, because @@ -8499,11 +8507,6 @@ static void i386_tr_init_disas_context(DisasContextB= ase *dcbase, CPUState *cpu) additional step for ecx=3D0 when icount is enabled. */ dc->repz_opt =3D !dc->jmp_opt && !(tb_cflags(dc->base.tb) & CF_USE_ICO= UNT); -#if 0 - /* check addseg logic */ - if (!dc->addseg && (dc->vm86 || !dc->pe || !dc->code32)) - printf("ERROR addseg\n"); -#endif =20 dc->T0 =3D tcg_temp_new(); dc->T1 =3D tcg_temp_new(); --=20 2.25.1