Delivered-To: raj.khem@gmail.com Received: by 10.90.86.4 with SMTP id j4cs313301agb; Sat, 8 Jan 2011 16:45:17 -0800 (PST) Received: by 10.216.186.82 with SMTP id v60mr20017574wem.56.1294533916559; Sat, 08 Jan 2011 16:45:16 -0800 (PST) Return-Path: Received: from smtp.smtpout.orange.fr (smtp01.smtpout.orange.fr [80.12.242.123]) by mx.google.com with ESMTP id o13si33755824wee.56.2011.01.08.16.45.16; Sat, 08 Jan 2011 16:45:16 -0800 (PST) Received-SPF: neutral (google.com: 80.12.242.123 is neither permitted nor denied by best guess record for domain of yann.morin.1998@anciens.enib.fr) client-ip=80.12.242.123; Authentication-Results: mx.google.com; spf=neutral (google.com: 80.12.242.123 is neither permitted nor denied by best guess record for domain of yann.morin.1998@anciens.enib.fr) smtp.mail=yann.morin.1998@anciens.enib.fr Received: from roazhon.bzh.lan ([90.32.245.227]) by mwinf5d24 with ME id tClC1f0024v5z3u03ClFDL; Sun, 09 Jan 2011 01:45:16 +0100 From: "Yann E. MORIN" To: uclibc@uclibc.org Cc: Khem Raj , Bernhard Reutner-Fischer , Carmelo AMOROSO Subject: [PATCH 2/7] ARM: introduce blind options to select & force THUMB mode Date: Sun, 9 Jan 2011 01:45:05 +0100 Message-Id: <1294533910-19305-3-git-send-email-yann.morin.1998@anciens.enib.fr> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1294533910-19305-1-git-send-email-yann.morin.1998@anciens.enib.fr> References: <1294533910-19305-1-git-send-email-yann.morin.1998@anciens.enib.fr> Add three new blind options to set use of Thumb mode: - COMPILE_IN_THUMB_MODE - if set, CFLAGS will contain -mthumb - if unset, the compiler's default is used - HAS_THUMB - CPUS with Thumb instruction set can select this - use of BX depends on this - FORCE_THUMB - CPUs that are Thumb-only must select this - this selects: HAS_THUMB, COMPILE_IN_THUMB_MODE and USE_BX Also, remove leading space in Rules.mak. Signed-off-by: "Yann E. MORIN" Cc: Khem Raj Cc: Bernhard Reutner-Fischer Cc: Carmelo AMOROSO --- Rules.mak | 7 ++++--- extra/Configs/Config.arm | 31 ++++++++++++++++++++++++++++--- 2 files changed, 32 insertions(+), 6 deletions(-) diff --git a/Rules.mak b/Rules.mak index eecdc64..2a16908 100644 --- a/Rules.mak +++ b/Rules.mak @@ -348,9 +348,10 @@ ifeq ($(TARGET_ARCH),arm) CPU_CFLAGS-$(CONFIG_ARM_SA1100)+=-mtune=strongarm1100 -march=armv4 CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=$(call check_gcc,-mtune=xscale,-mtune=strongarm110) CPU_CFLAGS-$(CONFIG_ARM_XSCALE)+=-march=armv5te -Wa,-mcpu=xscale - CPU_CFLAGS-$(CONFIG_ARM_IWMMXT)+=-march=iwmmxt -Wa,-mcpu=iwmmxt -mabi=iwmmxt - CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M3)+=-mcpu=cortex-m3 -mthumb - CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M1)+=-mcpu=cortex-m1 -mthumb + CPU_CFLAGS-$(CONFIG_ARM_IWMMXT)+=-march=iwmmxt -Wa,-mcpu=iwmmxt -mabi=iwmmxt + CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M3)+=-mcpu=cortex-m3 + CPU_CFLAGS-$(CONFIG_ARM_CORTEX_M1)+=-mcpu=cortex-m1 + CPU_CFLAGS-$(COMPILE_IN_THUMB_MODE)+=-mthumb endif ifeq ($(TARGET_ARCH),mips) diff --git a/extra/Configs/Config.arm b/extra/Configs/Config.arm index 3b90e67..c9c40d4 100644 --- a/extra/Configs/Config.arm +++ b/extra/Configs/Config.arm @@ -64,70 +64,95 @@ config CONFIG_ARM710 config CONFIG_ARM7TDMI bool "Arm 7TDMI" select ARCH_HAS_NO_MMU + select HAS_THUMB config CONFIG_ARM720T bool "Arm 720T" select ARCH_HAS_MMU + select HAS_THUMB config CONFIG_ARM920T bool "Arm 920T" select ARCH_HAS_MMU + select HAS_THUMB config CONFIG_ARM922T bool "Arm 922T" select ARCH_HAS_MMU + select HAS_THUMB config CONFIG_ARM926T bool "Arm 926T" select ARCH_HAS_MMU + select HAS_THUMB config CONFIG_ARM10T bool "Arm 10T" select ARCH_HAS_MMU + select HAS_THUMB config CONFIG_ARM1136JF_S bool "Arm 1136JF-S" select ARCH_HAS_MMU + select HAS_THUMB config CONFIG_ARM1176JZ_S bool "Arm 1176JZ-S" select ARCH_HAS_MMU + select HAS_THUMB config CONFIG_ARM1176JZF_S bool "Arm 1176JZF-S" select ARCH_HAS_MMU + select HAS_THUMB config CONFIG_ARM_CORTEX_M3 bool "Arm Cortex-M3" select ARCH_HAS_NO_MMU - select USE_BX + select FORCE_THUMB config CONFIG_ARM_CORTEX_M1 bool "Arm Cortex-M1" select ARCH_HAS_NO_MMU - select USE_BX + select FORCE_THUMB config CONFIG_ARM_SA110 bool "Intel StrongArm SA-110" select ARCH_HAS_MMU + select HAS_THUMB config CONFIG_ARM_SA1100 bool "Intel StrongArm SA-1100" select ARCH_HAS_MMU + select HAS_THUMB config CONFIG_ARM_XSCALE bool "Intel Xscale" select ARCH_HAS_MMU + select HAS_THUMB config CONFIG_ARM_IWMMXT bool "Intel Xscale With WMMX PXA27x" select ARCH_HAS_MMU + select HAS_THUMB endchoice +config HAS_THUMB + bool + +config FORCE_THUMB + bool + select HAS_THUMB + select COMPILE_IN_THUMB_MODE + select USE_BX + +config COMPILE_IN_THUMB_MODE + bool + config USE_BX bool "Use BX in function return" default y - depends on !CONFIG_GENERIC_ARM && !CONFIG_ARM610 && !CONFIG_ARM710 + depends on HAS_THUMB help Use BX instruction for THUMB aware architectures. -- 1.7.1