diff options
| author | Vincent Palatin <vpalatin@chromium.org> | 2015-04-27 14:47:19 -0700 |
|---|---|---|
| committer | ChromeOS Commit Bot <chromeos-commit-bot@chromium.org> | 2015-05-19 02:46:27 +0000 |
| commit | 2650ff3d70c9933e4c3dcd1401ca66b4426def4a (patch) | |
| tree | 7a4658b060d3439a525a7562c226358d55424035 /core/cortex-m | |
| parent | cb29daa58c0fa5866a7847c454967ef0376c7688 (diff) | |
| download | chrome-ec-2650ff3d70c9933e4c3dcd1401ca66b4426def4a.tar.gz | |
Add option to enable GCC LTO
Add CONFIG_LTO to use GCC Link-Time Optimizations to try to reduce the
flash footprint of the firmware.
Add additional protection to some functions/data to avoid removal by the
linker when their usage is not obvious.
Signed-off-by: Vincent Palatin <vpalatin@chromium.org>
BRANCH=none
BUG=none
TEST=make buildall (with and without LTO enable on all boards)
Change-Id: I586b8c1eda4592b416c85383b65153c1d5ab0059
Reviewed-on: https://chromium-review.googlesource.com/271291
Trybot-Ready: Vincent Palatin <vpalatin@chromium.org>
Tested-by: Vincent Palatin <vpalatin@chromium.org>
Reviewed-by: Randall Spangler <rspangler@chromium.org>
Reviewed-by: Alec Berg <alecaberg@chromium.org>
Commit-Queue: Vincent Palatin <vpalatin@chromium.org>
Diffstat (limited to 'core/cortex-m')
| -rw-r--r-- | core/cortex-m/build.mk | 5 | ||||
| -rw-r--r-- | core/cortex-m/irq_handler.h | 1 | ||||
| -rw-r--r-- | core/cortex-m/panic.c | 4 | ||||
| -rw-r--r-- | core/cortex-m/task.c | 6 | ||||
| -rw-r--r-- | core/cortex-m/watchdog.c | 2 |
5 files changed, 12 insertions, 6 deletions
diff --git a/core/cortex-m/build.mk b/core/cortex-m/build.mk index 522f6dedeb..5724a9ba39 100644 --- a/core/cortex-m/build.mk +++ b/core/cortex-m/build.mk @@ -17,6 +17,11 @@ CFLAGS_CPU+=-mthumb -Os -mno-sched-prolog CFLAGS_CPU+=-mno-unaligned-access CFLAGS_CPU+=$(CFLAGS_FPU-y) +ifneq ($(CONFIG_LTO),) +CFLAGS_CPU+=-flto +LDFLAGS_EXTRA+=-flto +endif + core-y=cpu.o init.o ldivmod.o uldivmod.o core-$(CONFIG_COMMON_PANIC_OUTPUT)+=panic.o core-$(CONFIG_COMMON_RUNTIME)+=switch.o task.o diff --git a/core/cortex-m/irq_handler.h b/core/cortex-m/irq_handler.h index 2b49de15e1..602c3245e4 100644 --- a/core/cortex-m/irq_handler.h +++ b/core/cortex-m/irq_handler.h @@ -24,6 +24,7 @@ #define DECLARE_IRQ(irq, routine, priority) DECLARE_IRQ_(irq, routine, priority) #define DECLARE_IRQ_(irq, routine, priority) \ void IRQ_HANDLER(irq)(void) __attribute__((naked)); \ + void __keep routine(void); \ void IRQ_HANDLER(irq)(void) \ { \ asm volatile("mov r0, lr\n" \ diff --git a/core/cortex-m/panic.c b/core/cortex-m/panic.c index 6b81e8c484..0d484bf1d0 100644 --- a/core/cortex-m/panic.c +++ b/core/cortex-m/panic.c @@ -302,7 +302,7 @@ void panic_data_print(const struct panic_data *pdata) #endif } -void report_panic(void) +void __keep report_panic(void) { struct panic_data *pdata = pdata_ptr; uint32_t sp; @@ -352,7 +352,7 @@ void report_panic(void) * * Declare this as a naked call so we can extract raw LR and IPSR values. */ -void exception_panic(void) __attribute__((naked)); +void __keep exception_panic(void) __attribute__((naked)); void exception_panic(void) { /* Save registers and branch directly to panic handler */ diff --git a/core/cortex-m/task.c b/core/cortex-m/task.c index 69b92d5de8..342fcdcf39 100644 --- a/core/cortex-m/task.c +++ b/core/cortex-m/task.c @@ -284,7 +284,7 @@ void __schedule(int desched, int resched) } #ifdef CONFIG_TASK_PROFILING -void task_start_irq_handler(void *excep_return) +void __keep task_start_irq_handler(void *excep_return) { /* * Get time before checking depth, in case this handler is @@ -312,7 +312,7 @@ void task_start_irq_handler(void *excep_return) } #endif -void task_resched_if_needed(void *excep_return) +void __keep task_resched_if_needed(void *excep_return) { /* * Continue iff a rescheduling event happened or profiling is active, @@ -414,7 +414,7 @@ void task_enable_irq(int irq) CPU_NVIC_EN(irq / 32) = 1 << (irq % 32); } -void task_disable_irq(int irq) +void __keep task_disable_irq(int irq) { CPU_NVIC_DIS(irq / 32) = 1 << (irq % 32); } diff --git a/core/cortex-m/watchdog.c b/core/cortex-m/watchdog.c index 8366f48d0a..229009330e 100644 --- a/core/cortex-m/watchdog.c +++ b/core/cortex-m/watchdog.c @@ -12,7 +12,7 @@ #include "uart.h" #include "watchdog.h" -void watchdog_trace(uint32_t excep_lr, uint32_t excep_sp) +void __keep watchdog_trace(uint32_t excep_lr, uint32_t excep_sp) { uint32_t psp; uint32_t *stack; |