From c886d2690dae0258d64fef02d8a24c901f7c2d6b Mon Sep 17 00:00:00 2001 From: kaloz Date: Sun, 27 Apr 2008 16:56:19 +0000 Subject: incomplete Gumstix support git-svn-id: svn://svn.openwrt.org/openwrt/trunk@10955 3c298f89-4303-0410-b956-a3cf2f4a3e73 --- .../patches-2.6.21/032-misalignment-handling.patch | 38 ++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 target/linux/pxa/patches-2.6.21/032-misalignment-handling.patch (limited to 'target/linux/pxa/patches-2.6.21/032-misalignment-handling.patch') diff --git a/target/linux/pxa/patches-2.6.21/032-misalignment-handling.patch b/target/linux/pxa/patches-2.6.21/032-misalignment-handling.patch new file mode 100644 index 000000000..e6aefb997 --- /dev/null +++ b/target/linux/pxa/patches-2.6.21/032-misalignment-handling.patch @@ -0,0 +1,38 @@ +Change the default alingment handling to not be silent failure +Index: linux-2.6.21gum/arch/arm/mm/alignment.c +=================================================================== +--- linux-2.6.21gum.orig/arch/arm/mm/alignment.c ++++ linux-2.6.21gum/arch/arm/mm/alignment.c +@@ -797,6 +797,8 @@ static int __init alignment_init(void) + res->write_proc = proc_alignment_write; + #endif + ++ ai_usermode = CONFIG_ALIGNMENT_HANDLING; ++ + hook_fault_code(1, do_alignment, SIGILL, "alignment exception"); + hook_fault_code(3, do_alignment, SIGILL, "alignment exception"); + +Index: linux-2.6.21gum/arch/arm/Kconfig +=================================================================== +--- linux-2.6.21gum.orig/arch/arm/Kconfig ++++ linux-2.6.21gum/arch/arm/Kconfig +@@ -709,6 +709,19 @@ config ALIGNMENT_TRAP + correct operation of some network protocols. With an IP-only + configuration it is safe to say N, otherwise say Y. + ++config ALIGNMENT_HANDLING ++ hex "Userspace alignment trap handling" ++ default "0x3" ++ depends on ALIGNMENT_TRAP ++ help ++ How should we handle alignment errors in userspace by default? This is a bitfield where: ++ 0 - silently ignore alignment errors (will lead to unexpected results) ++ 1 - report alignment errors through printk (will lead to unexpected results, but you'll know about them) ++ 2 - fix the alignment and make things work properly (performance degradation for un-aligned code) ++ 4 - raise SIGBUS on alignment traps ++ A good number to choose is probably either 3 (work slowly but log message) or 5 (log message and SIGBUS). ++ You can change the behavior at runtime through /proc/cpu/alignment if you have PROC_FS enabled. ++ + endmenu + + menu "Boot options" -- cgit v1.2.3