fatal error: sqlite3.h: No such file or directory
I got this issue fixed with $ sudo apt-get install libsqlite3-dev (debian wheezy)
arm
Measurement of TLB effects on a Cortex-A9
tl;dr -> Provide a proper MVCE. This answer should be a comment but is too big to be posted as comment, so posting as answer instead: I had to fix a bunch of syntax errors (missing semicolons) and declare undefined variables. After fixing all those problems, the code did NOTHING (the program quit even prior … Read more
Cross compiling static C hello world for Android using arm-linux-gnueabi-gcc
Try specifying the architecture/cpu. It sounds like the compiler is creating code with a higher architecture version than the emulator can handle. This might work: arm-linux-gnueabi-gcc -static -march=armv5 hi.c -o hi
Want to compile native Android binary I can run in terminal on the phone
Just use the android-ndk. And build a Android.mk like so. include $(BUILD_EXECUTABLE) is what tells it build a executable instead of a JNI .lib Android.mk ifneq ($(TARGET_SIMULATOR),true) LOCAL_PATH:= $(call my-dir) include $(CLEAR_VARS) LOCAL_CFLAGS += -Wall LOCAL_LDLIBS := -L$(LOCAL_PATH)/lib -llog -g LOCAL_C_INCLUDES := bionic LOCAL_C_INCLUDES += $(LOCAL_PATH)/include LOCAL_SRC_FILES:= main.cpp LOCAL_MODULE := mycmd include $(BUILD_EXECUTABLE) endif # … Read more
Why use LDR over MOV (or vice versa) in ARM assembly?
It is a trick/shortcut. say for example ldr r0,=main what would happen is the assembler would allocate a data word, near the instruction but outside the instruction path ldr r0,main_addr … b somewhere main_addr: .data main Now expand that trick to constants/immediates, esp those that cannot fit into a move immediate instruction: top: add r1,r2,r3 … Read more
What are “nosys”, “nano”, “rdimon” terms when using ARM GCC?
Gcc uses specs-strings, which control which subprocesses to run and what parameters it shall pass to them. The behavior defined by the spec-strings can be overridden using spec-files, whose purpose and syntax is documented here: https://gcc.gnu.org/onlinedocs/gcc/Spec-Files.html Looking at these spec files in the lib folder of the gcc tool chain (e.g. /usr/lib/arm-none-eabi/lib) we can see … Read more
What does ‘bank’ing a register mean?
Register banking refers to providing multiple copies of a register at the same address. Taken from section 1.4.6 of the arm docs The term is referring to a solution for the problem that not all registers can be seen at once. There is a different register bank for each processor mode. The banked registers give … Read more
How to place a variable at a given absolute address in memory (with GCC)
I don’t know, but you can easily create a workaround like this: int *var = (int*)0x40001000; *var = 4; It’s not exactly the same thing, but in most situations a perfect substitute. It will work with any compiler, not just GCC. If you use GCC, I assume you also use GNU ld (although it is … Read more
Can’t find Android 8.0-8.1 (Oreo) API 26-27 ARM System Images
The ARM images for API 26 and 27 are not available yet. ARM images available till API 25 only. Note: Google recommended an x86 system image on an x86 host for better emulation performance.
How to run a C program with no OS on the Raspberry Pi?
Fully automated minimal bare metal blinker example Tested on Ubuntu 16.04 host, Raspberry Pi 2. https://github.com/dwelch67/raspberrypi is the most comprehensive example set I’ve seen to date (previously mentioned on this now deleted answer), but this is a minimal easy to setup hello world to get you started quickly. Usage: Insert SD card on host Make … Read more