examples: fix building on arm32

wdfk-prog · trini · commit 5cf9e61f0fa9 · 2025-02-04T11:57:36.000-06:00
Refer to the commit a3c101a ("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
@@ -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)
 
