From a7b22962776109b5bfe3a3efa4f42622318c547d Mon Sep 17 00:00:00 2001 From: Rabin Vincent Date: Mon, 18 Jan 2010 15:04:32 +0100 Subject: ARM: 5883/1: Revert "disable NX support for OABI-supporting kernels" This reverts commit 14f0aa359365e8a93a77b71e3b840274b9b4dcb1. That commit was needed earlier because system call restarting for OABI (compat) required an executable stack and thus had problems with NX. Since ab72b00734ae4d0b ("ARM: Fix signal restart issues with NX and OABI compat") has reworked the code to not require an executable stack anymore, we can re-enable NX support for kernels with OABI (compat) support. Signed-off-by: Rabin Vincent Signed-off-by: Russell King --- arch/arm/kernel/elf.c | 9 --------- 1 file changed, 9 deletions(-) (limited to 'arch/arm/kernel') diff --git a/arch/arm/kernel/elf.c b/arch/arm/kernel/elf.c index 950391f194c4..d4a0da1e48f4 100644 --- a/arch/arm/kernel/elf.c +++ b/arch/arm/kernel/elf.c @@ -78,15 +78,6 @@ int arm_elf_read_implies_exec(const struct elf32_hdr *x, int executable_stack) return 1; if (cpu_architecture() < CPU_ARCH_ARMv6) return 1; -#if !defined(CONFIG_AEABI) || defined(CONFIG_OABI_COMPAT) - /* - * If we have support for OABI programs, we can never allow NX - * support - our signal syscall restart mechanism relies upon - * being able to execute code placed on the user stack. - */ - return 1; -#else return 0; -#endif } EXPORT_SYMBOL(arm_elf_read_implies_exec); -- cgit v1.2.2 From 200b7a8dc09504bc0aedac567a307a6e533f39e5 Mon Sep 17 00:00:00 2001 From: Tony Lindgren Date: Tue, 19 Jan 2010 16:40:07 +0100 Subject: ARM: 5884/1: arm: Fix DCC console for v7 Without this patch arch/arm/compressed/head.S defaults to generic DCC code that does not work for v7. For more information on the v7 DCC, see Cortex-A8 TRM "12.11.1 Debug communications channel". To use it with post 2.6.33-rc1 or later, you need to have: CONFIG_DEBUG_LL=y ONFIG_DEBUG_ICEDCC=y CONFIG_EARLY_PRINTK=y Earlier kernels need commit 93fd03a8c6728b58879f8af20ffd55d9c32a778b backported. Tested on omap3430. Signed-off-by: Tony Lindgren Signed-off-by: Russell King --- arch/arm/kernel/debug.S | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'arch/arm/kernel') diff --git a/arch/arm/kernel/debug.S b/arch/arm/kernel/debug.S index b121b6053cce..5c91addcaebc 100644 --- a/arch/arm/kernel/debug.S +++ b/arch/arm/kernel/debug.S @@ -49,6 +49,26 @@ 1002: .endm +#elif defined(CONFIG_CPU_V7) + + .macro addruart, rx + .endm + + .macro senduart, rd, rx + mcr p14, 0, \rd, c0, c5, 0 + .endm + + .macro busyuart, rd, rx +busy: mrc p14, 0, pc, c0, c1, 0 + bcs busy + .endm + + .macro waituart, rd, rx +wait: mrc p14, 0, pc, c0, c1, 0 + bcs wait + + .endm + #elif defined(CONFIG_CPU_XSCALE) .macro addruart, rx -- cgit v1.2.2 From 4e6d488af37980d224cbf298224db6173673f362 Mon Sep 17 00:00:00 2001 From: Tony Lindgren Date: Mon, 1 Feb 2010 23:26:53 +0100 Subject: ARM: 5910/1: ARM: Add tmp register for addruart and loadsp Otherwise more complicated uart configuration won't be possible. We can use r1 for tmp register for both head.S and debug.S. NOTE: This patch depends on another patch to add the the tmp register into all debug-macro.S files. That can be done with: $ sed -i -e "s/addruart,rx|addruart, rx/addruart, rx, tmp/" arch/arm/*/include/*/debug-macro.S Signed-off-by: Tony Lindgren Signed-off-by: Russell King --- arch/arm/kernel/debug.S | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) (limited to 'arch/arm/kernel') diff --git a/arch/arm/kernel/debug.S b/arch/arm/kernel/debug.S index 5c91addcaebc..a38b4879441d 100644 --- a/arch/arm/kernel/debug.S +++ b/arch/arm/kernel/debug.S @@ -24,7 +24,7 @@ #if defined(CONFIG_CPU_V6) - .macro addruart, rx + .macro addruart, rx, tmp .endm .macro senduart, rd, rx @@ -51,7 +51,7 @@ #elif defined(CONFIG_CPU_V7) - .macro addruart, rx + .macro addruart, rx, tmp .endm .macro senduart, rd, rx @@ -71,7 +71,7 @@ wait: mrc p14, 0, pc, c0, c1, 0 #elif defined(CONFIG_CPU_XSCALE) - .macro addruart, rx + .macro addruart, rx, tmp .endm .macro senduart, rd, rx @@ -98,7 +98,7 @@ wait: mrc p14, 0, pc, c0, c1, 0 #else - .macro addruart, rx + .macro addruart, rx, tmp .endm .macro senduart, rd, rx @@ -164,7 +164,7 @@ ENDPROC(printhex2) .ltorg ENTRY(printascii) - addruart r3 + addruart r3, r1 b 2f 1: waituart r2, r3 senduart r1, r3 @@ -180,7 +180,7 @@ ENTRY(printascii) ENDPROC(printascii) ENTRY(printch) - addruart r3 + addruart r3, r1 mov r1, r0 mov r0, #0 b 1b -- cgit v1.2.2