Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1945980AbaGRS2n (ORCPT ); Fri, 18 Jul 2014 14:28:43 -0400 Received: from mail-pa0-f44.google.com ([209.85.220.44]:43217 "EHLO mail-pa0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1422858AbaGRS2g (ORCPT ); Fri, 18 Jul 2014 14:28:36 -0400 From: Zi Shen Lim To: Catalin Marinas , Will Deacon , Jiang Liu , AKASHI Takahiro , "David S. Miller" , Daniel Borkmann , Alexei Starovoitov Cc: Zi Shen Lim , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, netdev@vger.kernel.org Subject: [PATCH 03/14] arm64: introduce aarch64_insn_gen_cond_branch_imm() Date: Fri, 18 Jul 2014 11:28:09 -0700 Message-Id: <1405708100-13604-4-git-send-email-zlim.lnx@gmail.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1405708100-13604-1-git-send-email-zlim.lnx@gmail.com> References: <1405708100-13604-1-git-send-email-zlim.lnx@gmail.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Introduce function to generate conditional branch (immediate) instructions. Signed-off-by: Zi Shen Lim --- arch/arm64/include/asm/insn.h | 21 +++++++++++++++++++++ arch/arm64/kernel/insn.c | 17 +++++++++++++++++ 2 files changed, 38 insertions(+) diff --git a/arch/arm64/include/asm/insn.h b/arch/arm64/include/asm/insn.h index 5080962..86a8a9c 100644 --- a/arch/arm64/include/asm/insn.h +++ b/arch/arm64/include/asm/insn.h @@ -117,6 +117,24 @@ enum aarch64_insn_variant { AARCH64_INSN_VARIANT_64BIT }; +enum aarch64_insn_condition { + AARCH64_INSN_COND_EQ = 0x0, /* == */ + AARCH64_INSN_COND_NE = 0x1, /* != */ + AARCH64_INSN_COND_CS = 0x2, /* unsigned >= */ + AARCH64_INSN_COND_CC = 0x3, /* unsigned < */ + AARCH64_INSN_COND_MI = 0x4, /* < 0 */ + AARCH64_INSN_COND_PL = 0x5, /* >= 0 */ + AARCH64_INSN_COND_VS = 0x6, /* overflow */ + AARCH64_INSN_COND_VC = 0x7, /* no overflow */ + AARCH64_INSN_COND_HI = 0x8, /* unsigned > */ + AARCH64_INSN_COND_LS = 0x9, /* unsigned <= */ + AARCH64_INSN_COND_GE = 0xa, /* signed >= */ + AARCH64_INSN_COND_LT = 0xb, /* signed < */ + AARCH64_INSN_COND_GT = 0xc, /* signed > */ + AARCH64_INSN_COND_LE = 0xd, /* signed <= */ + AARCH64_INSN_COND_AL = 0xe, /* always */ +}; + enum aarch64_insn_branch_type { AARCH64_INSN_BRANCH_NOLINK, AARCH64_INSN_BRANCH_LINK, @@ -135,6 +153,7 @@ __AARCH64_INSN_FUNCS(b, 0xFC000000, 0x14000000) __AARCH64_INSN_FUNCS(bl, 0xFC000000, 0x94000000) __AARCH64_INSN_FUNCS(cbz, 0xFE000000, 0x34000000) __AARCH64_INSN_FUNCS(cbnz, 0xFE000000, 0x35000000) +__AARCH64_INSN_FUNCS(bcond, 0xFF000010, 0x54000000) __AARCH64_INSN_FUNCS(svc, 0xFFE0001F, 0xD4000001) __AARCH64_INSN_FUNCS(hvc, 0xFFE0001F, 0xD4000002) __AARCH64_INSN_FUNCS(smc, 0xFFE0001F, 0xD4000003) @@ -159,6 +178,8 @@ u32 aarch64_insn_gen_comp_branch_imm(unsigned long pc, unsigned long addr, enum aarch64_insn_register reg, enum aarch64_insn_variant variant, enum aarch64_insn_branch_type type); +u32 aarch64_insn_gen_cond_branch_imm(unsigned long pc, unsigned long addr, + enum aarch64_insn_condition cond); u32 aarch64_insn_gen_hint(enum aarch64_insn_hint_op op); u32 aarch64_insn_gen_nop(void); u32 aarch64_insn_gen_branch_reg(enum aarch64_insn_register reg, diff --git a/arch/arm64/kernel/insn.c b/arch/arm64/kernel/insn.c index 6797936..b65edc0 100644 --- a/arch/arm64/kernel/insn.c +++ b/arch/arm64/kernel/insn.c @@ -380,6 +380,23 @@ u32 aarch64_insn_gen_comp_branch_imm(unsigned long pc, unsigned long addr, offset >> 2); } +u32 aarch64_insn_gen_cond_branch_imm(unsigned long pc, unsigned long addr, + enum aarch64_insn_condition cond) +{ + u32 insn; + long offset; + + offset = branch_imm_common(pc, addr, SZ_1M); + + insn = aarch64_insn_get_bcond_value(); + + BUG_ON(cond < AARCH64_INSN_COND_EQ || cond > AARCH64_INSN_COND_AL); + insn |= cond; + + return aarch64_insn_encode_immediate(AARCH64_INSN_IMM_19, insn, + offset >> 2); +} + u32 __kprobes aarch64_insn_gen_hint(enum aarch64_insn_hint_op op) { return aarch64_insn_get_hint_value() | op; -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/