0575b4b83e
Directives such as .long and .word do not magically cause the assembler location counter to become aligned in gas. As a result, using these directives in code sections can result in misaligned data words when building a Thumb-2 kernel (CONFIG_THUMB2_KERNEL). This is a Bad Thing, since the ABI permits the compiler to assume that fundamental types of word size or above are word- aligned when accessing them from C. If the data is not really word-aligned, this can cause impaired performance and stray alignment faults in some circumstances. In general, the following rules should be applied when using data word declaration directives inside code sections: * .quad and .double: .align 3 * .long, .word, .single, .float: .align (or .align 2) * .short: No explicit alignment required, since Thumb-2 instructions are always 2 or 4 bytes in size. immediately after an instruction. Signed-off-by: Dave Martin <dave.martin@linaro.org> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> LAKML-Reference: 1289913217-8672-1-git-send-email-dave.martin@linaro.org Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> |
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.. | ||
devices | ||
include/mach | ||
3ds_debugboard.c | ||
audmux-v1.c | ||
audmux-v2.c | ||
avic.c | ||
clock.c | ||
cpu.c | ||
cpufreq.c | ||
devices.c | ||
epit.c | ||
gpio.c | ||
iomux-v1.c | ||
iomux-v3.c | ||
iram_alloc.c | ||
irq-common.c | ||
irq-common.h | ||
Kconfig | ||
Makefile | ||
pwm.c | ||
ssi-fiq-ksym.c | ||
ssi-fiq.S | ||
system.c | ||
time.c | ||
tzic.c | ||
ulpi.c |