examples: fix building on arm32
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>
diff --git a/examples/api/crt0.S b/examples/api/crt0.S
index d2a9755..6899ebf 100644
--- a/examples/api/crt0.S
+++ b/examples/api/crt0.S
@@ -29,15 +29,17 @@
.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)