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examples: fix building on arm32

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Refer to the commit a3c101a613 ("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>
This commit is contained in:
Liya Huang 2025-01-28 09:13:16 +08:00 • committed by Tom Rini
parent adeea8568d
commit 5cf9e61f0f
1 changed files with 6 additions and 4 deletions
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10
examples/api/crt0.S
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@ -29,15 +29,17 @@ syscall:
.text
.globl _start
_start:
ldr ip, =search_hint
str sp, [ip]
ldr r4, =search_hint
mov r5, sp
str r5, [r4]
b main
.globl syscall
syscall:
ldr ip, =syscall_ptr
ldr pc, [ip]
ldr r4, =syscall_ptr
ldr r4, [r4]
bx r4
#elif defined(CONFIG_ARM64)