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[50.253.99.174]) by smtp.gmail.com with ESMTPSA id x15sm876909iob.8.2021.11.07.19.52.40 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 07 Nov 2021 19:52:41 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bsdimp-com.20210112.gappssmtp.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=GncYDfjxwlhtNC69qwkoQdNduf0of/aApvZ39YXAJoM=; b=MZjh9XbOL3nSD5GrxFCTTHblUVD7kYo+b0aqw6vqmdMG+KNb+gpniGELksu5JUwe6q 3TywRb2JIPcQ72jRUJCtG4yIKjHCZ05Mu7bnjj5rGmvvuNwzaCwK1S+6I/0wwqT75qUB nvYDg3idd9+tpsRwpZaRhPNYyibmOYNXaFTtgoBB75YmZxKWr7Z8wExWVdn3vdcoogLA +lPDN8bH5/dbmSzQUHqMfl6QIelz1frOqlNfrSkmqBHAzsX5oHYF0l13TFk67LDbosq7 dbj02bx1WSC9zF7hrhGwqKg2i3MTcD1AT0OsaqzTc4xHmJkOQt7+TrQHzAsMPZ6n6y2E GvCA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=GncYDfjxwlhtNC69qwkoQdNduf0of/aApvZ39YXAJoM=; b=XpzkeEhWUCeLXyR7s595RG9w1XK91MFF6YIC7qwKn+pwLOHfF3Q0bzIM0sj+BXYYh2 32n8QsqQSNDY5vlw6/utugG4p147H5HlhPO00jl5IPheZolI0R1sahPGyEyyqUiDPuoU zw9ADygg7xhm4z8kEkjRljza6C7pISlYn5pCF7/TClOwV1KtK3y8LTgoKen+mbxHAJs1 sN5CvzV7a9UFvsQTkoPvqcyCHEL46lRRxl/EW78yU+yPbgpwaZwC7iLZcfVeP6ZEiDfx /5h+3m1nLZvtz5vVNQCYfh/AU0ZyXR0KtVb87Y9++fzhScsvIrJfIEfTYfw9AGR3Sakv 8IBA== X-Gm-Message-State: AOAM533UnxgkynFjEjZo9WRk6O6gaqn4okG85DfxYbGt6hfDtQWWYvrI 8QN+9TaDjxvOa9ATwYHNhicF14ceqUYPsw== X-Google-Smtp-Source: ABdhPJw5dRmeBg31Ywv/z67GW9FozmVAXGBZWBL3mHCn1zW5GCseV+PxQmUVPDJydOHFQef25eCzlA== X-Received: by 2002:a5d:8c83:: with SMTP id g3mr11200078ion.24.1636343561515; Sun, 07 Nov 2021 19:52:41 -0800 (PST) From: Warner Losh To: qemu-devel@nongnu.org Subject: [PATCH v5 34/37] bsd-user/arm/signal.c: arm set_mcontext Date: Sun, 7 Nov 2021 20:51:33 -0700 Message-Id: <20211108035136.43687-35-imp@bsdimp.com> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20211108035136.43687-1-imp@bsdimp.com> References: <20211108035136.43687-1-imp@bsdimp.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Host-Lookup-Failed: Reverse DNS lookup failed for 2607:f8b0:4864:20::d32 (failed) 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: none client-ip=2607:f8b0:4864:20::d32; envelope-from=imp@bsdimp.com; helo=mail-io1-xd32.google.com X-Spam_score_int: -10 X-Spam_score: -1.1 X-Spam_bar: - X-Spam_report: (-1.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, PDS_HP_HELO_NORDNS=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=no 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: , Cc: Stacey Son , qemu-trivial@nongnu.org, Kyle Evans , Michael Tokarev , Laurent Vivier , Philippe Mathieu-Daude , Richard Henderson , Warner Losh Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZM-MESSAGEID: 1636345422987100001 Content-Type: text/plain; charset="utf-8" Move the machine context to the CPU state. Signed-off-by: Stacey Son Signed-off-by: Kyle Evans Signed-off-by: Warner Losh Reviewed-by: Richard Henderson --- bsd-user/arm/signal.c | 76 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 76 insertions(+) diff --git a/bsd-user/arm/signal.c b/bsd-user/arm/signal.c index 93c9bfc0d3..fb6228db6c 100644 --- a/bsd-user/arm/signal.c +++ b/bsd-user/arm/signal.c @@ -109,3 +109,79 @@ abi_long get_mcontext(CPUARMState *env, target_mcontex= t_t *mcp, int flags) } return err; } + +/* Compare to arm/arm/exec_machdep.c set_mcontext() */ +abi_long set_mcontext(CPUARMState *env, target_mcontext_t *mcp, int srflag) +{ + int err =3D 0; + const uint32_t *gr =3D mcp->__gregs; + uint32_t cpsr, ccpsr =3D cpsr_read(env); + uint32_t fpscr, mask; + + cpsr =3D tswap32(gr[TARGET_REG_CPSR]); + /* + * Only allow certain bits to change, reject attempted changes to non-= user + * bits. In addition, make sure we're headed for user mode and none of= the + * interrupt bits are set. + */ + if ((ccpsr & ~CPSR_USER) !=3D (cpsr & ~CPSR_USER)) { + return -TARGET_EINVAL; + } + if ((cpsr & CPSR_M) !=3D ARM_CPU_MODE_USR || + (cpsr & (CPSR_I | CPSR_F)) !=3D 0) { + return -TARGET_EINVAL; + } + + /* + * The movs pc,lr instruction that implements the return to userland m= asks + * these bits out. + */ + mask =3D cpsr & CPSR_T ? 0x1 : 0x3; + + /* + * Make sure that we either have no vfp, or it's the correct size. + * FreeBSD just ignores it, though, so maybe we'll need to adjust + * things below instead. + */ + if (mcp->mc_vfp_size !=3D 0 && mcp->mc_vfp_size !=3D sizeof(target_mco= ntext_vfp_t)) { + return -TARGET_EINVAL; + } + + env->regs[0] =3D tswap32(gr[TARGET_REG_R0]); + env->regs[1] =3D tswap32(gr[TARGET_REG_R1]); + env->regs[2] =3D tswap32(gr[TARGET_REG_R2]); + env->regs[3] =3D tswap32(gr[TARGET_REG_R3]); + env->regs[4] =3D tswap32(gr[TARGET_REG_R4]); + env->regs[5] =3D tswap32(gr[TARGET_REG_R5]); + env->regs[6] =3D tswap32(gr[TARGET_REG_R6]); + env->regs[7] =3D tswap32(gr[TARGET_REG_R7]); + env->regs[8] =3D tswap32(gr[TARGET_REG_R8]); + env->regs[9] =3D tswap32(gr[TARGET_REG_R9]); + env->regs[10] =3D tswap32(gr[TARGET_REG_R10]); + env->regs[11] =3D tswap32(gr[TARGET_REG_R11]); + env->regs[12] =3D tswap32(gr[TARGET_REG_R12]); + + env->regs[13] =3D tswap32(gr[TARGET_REG_SP]); + env->regs[14] =3D tswap32(gr[TARGET_REG_LR]); + env->regs[15] =3D tswap32(gr[TARGET_REG_PC] & ~mask); + if (mcp->mc_vfp_size !=3D 0 && mcp->mc_vfp_ptr !=3D 0) { + /* see set_vfpcontext in sys/arm/arm/exec_machdep.c */ + target_mcontext_vfp_t *vfp; + + vfp =3D lock_user(VERIFY_READ, mcp->mc_vfp_ptr, sizeof(*vfp), 1); + for (int i =3D 0; i < 32; i++) { + __get_user(*aa32_vfp_dreg(env, i), &vfp->mcv_reg[i]); + } + __get_user(fpscr, &vfp->mcv_fpscr); + vfp_set_fpscr(env, fpscr); + unlock_user(vfp, mcp->mc_vfp_ptr, sizeof(target_ucontext_t)); + + /* + * linux-user sets fpexc, fpinst and fpinst2, but these aren't in + * FreeBSD's mcontext, what to do? + */ + } + cpsr_write(env, cpsr, CPSR_USER | CPSR_EXEC, CPSRWriteByInstr); + + return err; +} --=20 2.33.0