u-boot.git/examples, branch v2026.04-rc4

examples: Fix checking id parameter in thread_start

2025-12-05T22:23:54+00:00

lthreads is of size MAX_THREADS, hence id must be lower than
MAX_THREADS to avoid any potential buffer overflow in
thread_start function.

Signed-off-by: Francois Berder

examples: fix building on arm32

2025-02-04T17:57:36+00:00

Refer to the commit a3c101a61348 ("examples: fix building on arm64")
fix for arm32. crt0.S does not even build with:
    operating system and architecture:
        5.15.0-130-generic x86_64
    installed version of gcc and binutils:
        gcc version 9.4.0 (Ubuntu 9.4.0-1ubuntu1~20.04.3)
    GNU ld (GNU Binutils for Ubuntu) 2.34
    used defconfig:
        stm32h750-art-pi_defconfig
    used commands for building:
        export CROSS_COMPILE=arm-none-eabi- ARCH=arm
        make stm32h750-art-pi_defconfig
        make menuconfig # to add
        make
    examples/api/crt0.S: Assembler messages:
    examples/api/crt0.S:32: Error: lo register required -- `ldr ip,=search_hint'
    examples/api/crt0.S:33: Error: lo register required -- `str sp,[ip]'
    examples/api/crt0.S:39: Error: lo register required -- `ldr ip,=syscall_ptr'
    examples/api/crt0.S:40: Error: lo register required -- `ldr pc,[ip]'
    make[2]: *** [scripts/Makefile.build:292：examples/api/crt0.o] Error 1

Use valid register names and instructions.

Signed-off-by: Liya Huang <1425075683@qq.com>

examples: eliminate CONFIG_STANDALONE_LOAD_ADDR

2025-02-04T17:57:36+00:00

CONFIG_STANDALONE_LOAD_ADDR has been used for examples/standalone
but not for examples/api.

The suitability of an address to load an ELF binary and run it does
not only depend on the architecture but also on the memory layout of
the board which is not reflected in the default value of
CONFIG_STANDALONE_LOAD_ADDR.

Commit 32b7e39db4d3 ("Convert CONFIG_STANDALONE_LOAD_ADDR to Kconfig")
set the default on RISC-V to 0x0 though most boards used 0x80200000
before the patch.

On most boards we can assume 8 MiB of memory available above $loadaddr.
So we can safely use $loadaddr + 4 MiB as load address for the standalone
example and eliminate CONFIG_STANDALONE_LOAD_ADDR altogether.

Fixes: 32b7e39db4d3 ("Convert CONFIG_STANDALONE_LOAD_ADDR to Kconfig")
Signed-off-by: Heinrich Schuchardt

examples/api: improve determination of LOAD_ADDR

2025-02-04T17:57:36+00:00

The current load address for the 'demo' binary does not work for
qemu_arm_defconfig.

The suitability of an address to load an ELF binary and run it does
not only depend on the architecture but also on the memory layout of
the board.

On most boards we can assume that 8 MiB of memory is available above
$loadaddr. So $loadaddr + 0x400000 should work there.

Signed-off-by: Heinrich Schuchardt

examples: use QEMU compatible LOAD_ADDR on RISC-V

2025-01-05T01:30:47+00:00

On some RISC-V including QEMU $loadaddr is 0x80200000.
For bootelf to work choose a different LOAD_ADDR to which the demo ELF
binary is relocated.

Signed-off-by: Heinrich Schuchardt

examples: use architecture specific memset() on RISC-V

2025-01-05T01:30:47+00:00

Build the architecture specific memset() if configured.

Signed-off-by: Heinrich Schuchardt

examples: implement _start and syscall for RISC-V

2025-01-05T01:30:47+00:00

To build the API examples on RISC-V we need to
implement _start and syscall for RISC-V.

Signed-off-by: Heinrich Schuchardt

examples: make glue and demo code compatible with 64-bit

2024-11-14T16:51:07+00:00

Commit f9886bc60f42 ("Added arm64 assembly for examples/api crt0")
added a 64-bit target for the examples but did not adjust the demo
code to be 64-bit compatible.

Change variable size for pointers.
Use %p to print pointers.

Signed-off-by: Heinrich Schuchardt

examples: adjust LOAD_ADDR on arm64

2024-11-14T16:51:07+00:00

Change the load address on arm64 such that it is compatible with the memory
available on qemu_arm64_defconfig.

Signed-off-by: Heinrich Schuchardt

examples: fix building on arm64

2024-11-14T16:51:07+00:00

Commit f9886bc60f42 ("Added arm64 assembly for examples/api crt0") tried to
add arm64 support to the examples but crt0.S does not even build for
qemu_arm64_defconfig with CONFIG_API=y, CONFIG_EXAMPLES=y:

    examples/api/crt0.S: Assembler messages:
    examples/api/crt0.S:32: Error:
        expected a register at operand 1 -- `ldr ip,=search_hint'
    examples/api/crt0.S:33: Error:
        unexpected register type at operand 1 -- `str sp,[ip]'
    make[2]: *** [scripts/Makefile.build:292: examples/api/crt0.o] Error 1

Do not define _start twice.
Use valid register names.
Move syscall_ptr and search_hint to the data section to avoid an invalid
relocation.

Fixes: f9886bc60f42 ("Added arm64 assembly for examples/api crt0")
Signed-off-by: Heinrich Schuchardt