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([172.58.111.133]) by smtp.gmail.com with ESMTPSA id 006d021491bc7-61970693b48sm1093401eaf.19.2025.08.02.16.06.41 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 02 Aug 2025 16:06:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; t=1754176004; x=1754780804; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:from:to:cc:subject:date:message-id :reply-to; bh=wzCvIZrc8oCNQOp0LEKf8glJh+GHBNdljJm8N5U6qvw=; b=I4PVeEHoDGySDb/093LxvnsxJLHjqYhYvihk9kko+iFfbbIa3JnRIKg3VmKOFsJr95 m7MYa0HvmrcXfPtjQplN43MQ65xUFtLDamPPrFE8fH/4pZAqKbr0envjtnCbK/Rw8FE/ 5AgG2mkSQ1r4+3/i/sOmswY6YSWgc/NDnac0MnB8rrXgoYWiT0GpthLrHWau8347RKVM sumG1p6jq8nmXIU97CELgKUh690nLvkg8zyZohyb70Cc4yCQzpP2/f6CZP6WuqPRzcWM WMNzjtVLwSptEeiHWa8o+LafzkZHgkyB2kNyZg5b7jiqfMUVHrsf+Z40gpJr+NQvts2z HR2w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1754176004; x=1754780804; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=wzCvIZrc8oCNQOp0LEKf8glJh+GHBNdljJm8N5U6qvw=; b=CCB2KxH5qIuxzP5il81aAP76yJ+SyVyrn3TInb8CUgfcuijXetDxvn2XnENgH3DSOU tyEgKl8WLPQzXrDzgESzC8tc48+KcpzG3TdL711lZjqVnhRo/RLefEdPTN412IJmnNUa nHPitjL/fMkrMd7o1NnjE6S/uPQT/S2Ea8dq1bsDSvOpdOAdFesnx82O870GvO6c3MtP b+q1dpHIKlpQlhZLDEE89L3KCGQtNuXMUkzcgUyWMWBwKdPHn09UoqwQUlINgcLfFQVI otIGpe27yDcvKk5c/NcaYkZ8X5wciGVfpjYBHXPDxTmTZSWrr1WonmUwz3blIgfXnoym 3Tlg== X-Gm-Message-State: AOJu0YzYD9zENhqGpuNG/htunY8ZlbHQDoLvNAmZYA4n4tjXOEft37hf UuUf1TJIuF7dISA6GwvsDVl5olqjZheBbp76OprMPnSERVUqxFhCq7dI6FfqXJbEAb0O7nVM114 wgZqkO0A= X-Gm-Gg: ASbGncsJEQcZO6c0Z8NzclRwLxlMQlRabHBdqCxnjr9tZwN1CXJchtlSAuhf69fvZrz 3Ec5OsObZGDAMUTVY7xCoT1mwQIqD93w7sSUwxyMUwn+SNvuJhplS8m9sSKPFM4gwYRuBoSvNwf pNWIMycuiDj52OxsVX9SUhuYzxEfZ1DEkYQ/LO7GCaTBYme25OiUCBcCqhQR8OYdra3eH78yDTG lTA4ZVCnGC9jb8CDJZO3g1BZYjaTYPNM+PbF5NvBcOZYQqbg9s+p7qz6paICYP99qNnC4He5oMc 1mddSPp1pj4fx7hVi6iCdcGe4LKnqvH7QdZ/S0VUL23cPkfiBFg+7aAiVHL7TlutugHxEp3r60k dBQoMZbNxkf5dLfX3Yoo6jmd7I1VWFrUjgtRaVz7V1u2fyH8lNw8xj9X0F46QDuQ= X-Google-Smtp-Source: AGHT+IE6bmudApkMwXRm9ryQIDblB1/xahcPM/XUEMeHRZMIOF5SSnXP8+KpEMM9etSB5c6OK9vH2w== X-Received: by 2002:a05:6808:1782:b0:41c:9345:3ab9 with SMTP id 5614622812f47-433f0238b05mr3180518b6e.15.1754176004086; Sat, 02 Aug 2025 16:06:44 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Subject: [PATCH v2 26/95] linux-user/i386: Create init_main_thread Date: Sun, 3 Aug 2025 09:03:50 +1000 Message-ID: <20250802230459.412251-27-richard.henderson@linaro.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250802230459.412251-1-richard.henderson@linaro.org> References: <20250802230459.412251-1-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::22d; envelope-from=richard.henderson@linaro.org; helo=mail-oi1-x22d.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=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1754176400428116600 Content-Type: text/plain; charset="utf-8" Merge init_thread and target_cpu_copy_regs. There's no point going through a target_pt_regs intermediate. Temporarily introduce HAVE_INIT_MAIN_THREAD during conversion. Signed-off-by: Richard Henderson Reviewed-by: Peter Maydell --- linux-user/qemu.h | 1 + linux-user/elfload.c | 29 +++++------------------ linux-user/i386/cpu_loop.c | 48 +++++++++++++++++--------------------- 3 files changed, 29 insertions(+), 49 deletions(-) diff --git a/linux-user/qemu.h b/linux-user/qemu.h index 0c3cfe93a1..8a9500d4f4 100644 --- a/linux-user/qemu.h +++ b/linux-user/qemu.h @@ -361,5 +361,6 @@ CPUArchState *cpu_copy(CPUArchState *env); =20 typedef struct target_pt_regs target_pt_regs; void target_cpu_copy_regs(CPUArchState *env, target_pt_regs *regs); +void init_main_thread(CPUState *cs, struct image_info *info); =20 #endif /* QEMU_H */ diff --git a/linux-user/elfload.c b/linux-user/elfload.c index 6fce74f45a..89f3972253 100644 --- a/linux-user/elfload.c +++ b/linux-user/elfload.c @@ -149,17 +149,12 @@ typedef abi_int target_pid_t; =20 #ifdef TARGET_I386 =20 +#define HAVE_INIT_MAIN_THREAD + #ifdef TARGET_X86_64 #define ELF_CLASS ELFCLASS64 #define ELF_ARCH EM_X86_64 =20 -static inline void init_thread(struct target_pt_regs *regs, struct image_i= nfo *infop) -{ - regs->rax =3D 0; - regs->rsp =3D infop->start_stack; - regs->rip =3D infop->entry; -} - #define ELF_NREG 27 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; =20 @@ -237,22 +232,6 @@ static bool init_guest_commpage(void) =20 #define EXSTACK_DEFAULT true =20 -static inline void init_thread(struct target_pt_regs *regs, - struct image_info *infop) -{ - regs->esp =3D infop->start_stack; - regs->eip =3D infop->entry; - - /* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program - starts %edx contains a pointer to a function which might be - registered using `atexit'. This provides a mean for the - dynamic linker to call DT_FINI functions for shared libraries - that have been loaded before the code runs. - - A value of 0 tells we have no such handler. */ - regs->edx =3D 0; -} - #define ELF_NREG 17 typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; =20 @@ -3621,8 +3600,12 @@ static int elf_core_dump(int signr, const CPUArchSta= te *env) =20 void do_init_main_thread(CPUState *cs, struct image_info *infop) { +#ifdef HAVE_INIT_MAIN_THREAD + init_main_thread(cs, infop); +#else target_pt_regs regs =3D { }; =20 init_thread(®s, infop); target_cpu_copy_regs(cpu_env(cs), ®s); +#endif } diff --git a/linux-user/i386/cpu_loop.c b/linux-user/i386/cpu_loop.c index d96d5553fa..7b2d8b03d8 100644 --- a/linux-user/i386/cpu_loop.c +++ b/linux-user/i386/cpu_loop.c @@ -331,11 +331,10 @@ static void target_cpu_free(void *obj) g_free(obj); } =20 -void target_cpu_copy_regs(CPUArchState *env, target_pt_regs *regs) +void init_main_thread(CPUState *cpu, struct image_info *info) { - CPUState *cpu =3D env_cpu(env); + CPUArchState *env =3D cpu_env(cpu); bool is64 =3D (env->features[FEAT_8000_0001_EDX] & CPUID_EXT2_LM) !=3D= 0; - int i; =20 OBJECT(cpu)->free =3D target_cpu_free; env->cr[0] =3D CR0_PG_MASK | CR0_WP_MASK | CR0_PE_MASK; @@ -361,28 +360,25 @@ void target_cpu_copy_regs(CPUArchState *env, target_p= t_regs *regs) /* flags setup : we activate the IRQs by default as in user mode */ env->eflags |=3D IF_MASK; =20 - /* linux register setup */ -#ifndef TARGET_ABI32 - env->regs[R_EAX] =3D regs->rax; - env->regs[R_EBX] =3D regs->rbx; - env->regs[R_ECX] =3D regs->rcx; - env->regs[R_EDX] =3D regs->rdx; - env->regs[R_ESI] =3D regs->rsi; - env->regs[R_EDI] =3D regs->rdi; - env->regs[R_EBP] =3D regs->rbp; - env->regs[R_ESP] =3D regs->rsp; - env->eip =3D regs->rip; -#else - env->regs[R_EAX] =3D regs->eax; - env->regs[R_EBX] =3D regs->ebx; - env->regs[R_ECX] =3D regs->ecx; - env->regs[R_EDX] =3D regs->edx; - env->regs[R_ESI] =3D regs->esi; - env->regs[R_EDI] =3D regs->edi; - env->regs[R_EBP] =3D regs->ebp; - env->regs[R_ESP] =3D regs->esp; - env->eip =3D regs->eip; -#endif + /* + * Linux register setup. + * + * SVR4/i386 ABI (pages 3-31, 3-32) says that when the program + * starts %edx contains a pointer to a function which might be + * registered using `atexit'. This provides a mean for the + * dynamic linker to call DT_FINI functions for shared libraries + * that have been loaded before the code runs. + * A value of 0 tells we have no such handler. + * + * This applies to x86_64 as well as i386. + * + * That said, the kernel's ELF_PLAT_INIT simply zeros all of the gener= al + * registers. Note that x86_cpu_reset_hold will set %edx to cpuid_ver= sion; + * clear all general registers defensively. + */ + memset(env->regs, 0, sizeof(env->regs)); + env->regs[R_ESP] =3D info->start_stack; + env->eip =3D info->entry; =20 /* linux interrupt setup */ #ifndef TARGET_ABI32 @@ -394,7 +390,7 @@ void target_cpu_copy_regs(CPUArchState *env, target_pt_= regs *regs) PROT_READ|PROT_WRITE, MAP_ANONYMOUS|MAP_PRIVATE, -1, 0); idt_table =3D g2h_untagged(env->idt.base); - for (i =3D 0; i < 20; i++) { + for (int i =3D 0; i < 20; i++) { set_idt(i, 0, is64); } set_idt(3, 3, is64); --=20 2.43.0