From nobody Thu Nov 7 13:30:57 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1632591983790898.4584198500113; Sat, 25 Sep 2021 10:46:23 -0700 (PDT) Received: from localhost ([::1]:40782 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mUBkk-0006u2-Kr for importer@patchew.org; Sat, 25 Sep 2021 13:46:22 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:36516) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mUBW4-0002Gr-2n for qemu-devel@nongnu.org; Sat, 25 Sep 2021 13:31:12 -0400 Received: from [115.28.160.31] (port=57184 helo=mailbox.box.xen0n.name) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mUBW0-0005OD-UI for qemu-devel@nongnu.org; Sat, 25 Sep 2021 13:31:11 -0400 Received: from ld50.lan (unknown [101.88.29.172]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)) (No client certificate requested) by mailbox.box.xen0n.name (Postfix) with ESMTPSA id 06BF560B37; Sun, 26 Sep 2021 01:30:53 +0800 (CST) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=xen0n.name; s=mail; t=1632591053; bh=pPYeEZ6V03iiEXbuF1Cbpnc5rAgnHP1Rg3qeyrypKwU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ifpyKLSgCtguiDFYe9zlnbo25PsRTwwNBbrID/Op10JCxa7PxOOErKb9wGK2QiMkd zGujt8txbiDPAHA5TBsIyMekpOUAeTXKDczrETSZjFEWaEGu6BSOkZeqWqBmEzeemP E5XSVfKIcEdig2Caz5vjdWE/lUozKkfIbd7I35Cw= From: WANG Xuerui To: qemu-devel@nongnu.org Subject: [PATCH v6 07/30] tcg/loongarch64: Implement necessary relocation operations Date: Sun, 26 Sep 2021 01:30:09 +0800 Message-Id: <20210925173032.2434906-8-git@xen0n.name> X-Mailer: git-send-email 2.33.0 In-Reply-To: <20210925173032.2434906-1-git@xen0n.name> References: <20210925173032.2434906-1-git@xen0n.name> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Host-Lookup-Failed: Reverse DNS lookup failed for 115.28.160.31 (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: pass client-ip=115.28.160.31; envelope-from=git@xen0n.name; helo=mailbox.box.xen0n.name X-Spam_score_int: -12 X-Spam_score: -1.3 X-Spam_bar: - X-Spam_report: (-1.3 / 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, RDNS_NONE=0.793, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no 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: Peter Maydell , XiaoJuan Yang , Richard Henderson , Song Gao , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , WANG Xuerui , Laurent Vivier 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: 1632591985263100001 Content-Type: text/plain; charset="utf-8" Signed-off-by: WANG Xuerui Reviewed-by: Richard Henderson --- tcg/loongarch64/tcg-target.c.inc | 66 ++++++++++++++++++++++++++++++++ 1 file changed, 66 insertions(+) diff --git a/tcg/loongarch64/tcg-target.c.inc b/tcg/loongarch64/tcg-target.= c.inc index 64e57bd055..fbacaef862 100644 --- a/tcg/loongarch64/tcg-target.c.inc +++ b/tcg/loongarch64/tcg-target.c.inc @@ -168,3 +168,69 @@ static bool tcg_target_const_match(int64_t val, TCGTyp= e type, int ct) } return false; } + +/* + * Relocations + */ + +/* + * Relocation records defined in LoongArch ELF psABI v1.00 is way too + * complicated; a whopping stack machine is needed to stuff the fields, at + * the very least one SOP_PUSH and one SOP_POP (of the correct format) are + * needed. + * + * Hence, define our own simpler relocation types. Numbers are chosen as to + * not collide with potential future additions to the true ELF relocation + * type enum. + */ + +/* Field Sk16, shifted right by 2; suitable for conditional jumps */ +#define R_LOONGARCH_BR_SK16 256 +/* Field Sd10k16, shifted right by 2; suitable for B and BL */ +#define R_LOONGARCH_BR_SD10K16 257 + +static bool reloc_br_sk16(tcg_insn_unit *src_rw, const tcg_insn_unit *targ= et) +{ + const tcg_insn_unit *src_rx =3D tcg_splitwx_to_rx(src_rw); + intptr_t offset =3D (intptr_t)target - (intptr_t)src_rx; + + tcg_debug_assert((offset & 3) =3D=3D 0); + offset >>=3D 2; + if (offset =3D=3D sextreg(offset, 0, 16)) { + *src_rw =3D deposit64(*src_rw, 10, 16, offset); + return true; + } + + return false; +} + +static bool reloc_br_sd10k16(tcg_insn_unit *src_rw, + const tcg_insn_unit *target) +{ + const tcg_insn_unit *src_rx =3D tcg_splitwx_to_rx(src_rw); + intptr_t offset =3D (intptr_t)target - (intptr_t)src_rx; + + tcg_debug_assert((offset & 3) =3D=3D 0); + offset >>=3D 2; + if (offset =3D=3D sextreg(offset, 0, 26)) { + *src_rw =3D deposit64(*src_rw, 0, 10, offset >> 16); /* slot d10 */ + *src_rw =3D deposit64(*src_rw, 10, 16, offset); /* slot k16 */ + return true; + } + + return false; +} + +static bool patch_reloc(tcg_insn_unit *code_ptr, int type, + intptr_t value, intptr_t addend) +{ + tcg_debug_assert(addend =3D=3D 0); + switch (type) { + case R_LOONGARCH_BR_SK16: + return reloc_br_sk16(code_ptr, (tcg_insn_unit *)value); + case R_LOONGARCH_BR_SD10K16: + return reloc_br_sd10k16(code_ptr, (tcg_insn_unit *)value); + default: + g_assert_not_reached(); + } +} --=20 2.33.0