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Received-SPF: Pass (protection.outlook.com: domain of arm.com designates 40.67.248.234 as permitted sender) receiver=protection.outlook.com; client-ip=40.67.248.234; helo=nebula.arm.com; Received: from nebula.arm.com (40.67.248.234) by DB5EUR03FT063.mail.protection.outlook.com (10.152.20.209) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.5123.19 via Frontend Transport; Fri, 1 Apr 2022 09:16:53 +0000 Received: from AZ-NEU-EX04.Arm.com (10.251.24.32) by AZ-NEU-EX04.Arm.com (10.251.24.32) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2308.27; Fri, 1 Apr 2022 09:16:57 +0000 Received: from e129018.arm.com (10.57.6.188) by mail.arm.com (10.251.24.32) with Microsoft SMTP Server id 15.1.2308.27 via Frontend Transport; Fri, 1 Apr 2022 09:16:57 +0000 From: Christophe Lyon To: CC: , , Christophe Lyon , Christophe Lyon Subject: [PATCH v4 1/5] gdb/arm: Fix prologue analysis to support vpush Date: Fri, 1 Apr 2022 11:16:03 +0200 Message-ID: <20220401091607.2771030-2-christophe.lyon@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220401091607.2771030-1-christophe.lyon@arm.com> References: <20220401091607.2771030-1-christophe.lyon@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-EOPAttributedMessage: 1 X-MS-Office365-Filtering-Correlation-Id: 858831bb-630c-4373-c22e-08da13c0648e X-MS-TrafficTypeDiagnostic: DB7PR08MB3243:EE_|DB5EUR03FT038:EE_|DB6PR0801MB1847:EE_ X-Microsoft-Antispam-PRVS: x-checkrecipientrouted: true NoDisclaimer: true X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam-Untrusted: BCL:0; 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This patch updates thumb_analyze_prologue accordingly, adding support for vpush of D-registers. Signed-off-by: Christophe Lyon Signed-off-by: Christophe Lyon --- gdb/arm-tdep.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) diff --git a/gdb/arm-tdep.c b/gdb/arm-tdep.c index d36856e1f3b..9e623057e4a 100644 --- a/gdb/arm-tdep.c +++ b/gdb/arm-tdep.c @@ -896,6 +896,35 @@ thumb_analyze_prologue (struct gdbarch *gdbarch, regs[bits (insn, 0, 3)] = addr; } + /* vstmdb Rn{!}, { D-registers } (aka vpush). */ + else if ((insn & 0xff20) == 0xed20 + && (inst2 & 0x0f00) == 0x0b00 + && pv_is_register (regs[bits (insn, 0, 3)], ARM_SP_REGNUM)) + { + /* Address SP points to. */ + pv_t addr = regs[bits (insn, 0, 3)]; + + /* Number of registers saved. */ + unsigned int number = bits (inst2, 0, 7) >> 1; + + /* First register to save. */ + int vd = bits (inst2, 12, 15) | (bits (insn, 6, 6) << 4); + + if (stack.store_would_trash (addr)) + break; + + /* Calculate offsets of saved registers. */ + for (; number > 0; number--) + { + addr = pv_add_constant (addr, -8); + stack.store (addr, 8, pv_register (ARM_D0_REGNUM + + vd + number, 0)); + } + + /* Writeback SP to account for the saved registers. */ + regs[bits (insn, 0, 3)] = addr; + } + else if ((insn & 0xff50) == 0xe940 /* strd Rt, Rt2, [Rn, #+/-imm]{!} */ && pv_is_register (regs[bits (insn, 0, 3)], ARM_SP_REGNUM)) -- 2.17.1