mirror of
https://github.com/cirosantilli/linux-kernel-module-cheat.git
synced 2026-01-23 02:05:57 +01:00
c8c4f89854
Previously had wonky line pointer in asm_main. New interface simpler and more portable. Add tests for ASSERT_EQ_ and family in arm and aarch64, previously on x86_64. ASSERT_EQ_ and family in ARM can now either take =123, =addr or var, before this the = was added on macros so var was not possible. Define the main function directly in assembly, the C driver was useless.
60 lines
1.2 KiB
ArmAsm
60 lines
1.2 KiB
ArmAsm
/* https://github.com/cirosantilli/linux-kernel-module-cheat#arm-calling-convention */
|
|
|
|
#include <lkmc.h>
|
|
|
|
.data
|
|
puts_s:
|
|
.asciz "hello puts"
|
|
printf_format:
|
|
.asciz "hello printf %x\n"
|
|
my_array_0:
|
|
.word 0x11111111, 0x22222222, 0x33333333, 0x44444444
|
|
my_array_1:
|
|
.word 0x55555555, 0x66666666, 0x77777777, 0x88888888
|
|
|
|
LKMC_PROLOGUE
|
|
/* puts("hello world") */
|
|
/* r0 is first argument. */
|
|
ldr r0, =puts_s
|
|
bl puts
|
|
/* Check exit status >= 0 for success. */
|
|
cmp r0, 0
|
|
LKMC_ASSERT(bge)
|
|
|
|
/* printf */
|
|
ldr r0, =printf_format
|
|
ldr r1, =0x12345678
|
|
bl printf
|
|
cmp r0, 0
|
|
LKMC_ASSERT(bge)
|
|
|
|
/* memcpy and memcmp. */
|
|
|
|
/* Smaller. */
|
|
ldr r0, =my_array_0
|
|
ldr r1, =my_array_1
|
|
ldr r2, =0x10
|
|
bl memcmp
|
|
cmp r0, 0
|
|
LKMC_ASSERT(blt)
|
|
|
|
/* Copy. */
|
|
ldr r0, =my_array_0
|
|
ldr r1, =my_array_1
|
|
ldr r2, =0x10
|
|
bl memcpy
|
|
|
|
/* Equal. */
|
|
ldr r0, =my_array_0
|
|
ldr r1, =my_array_1
|
|
ldr r2, =0x10
|
|
bl memcmp
|
|
LKMC_ASSERT_EQ(r0, =0)
|
|
|
|
/* exit(0) */
|
|
mov r0, 0
|
|
bl exit
|
|
|
|
/* Never reached, just for the fail symbol. */
|
|
LKMC_EPILOGUE
|