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shared/runtime/semihosting_arm: Support semihosting on non-Thumb ARM.

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Signed-off-by: Damien George <damien@micropython.org>
This commit is contained in:
Damien George 2024-08-12 11:17:00 +10:00
parent c8838b5004
commit 9f9c283ef4
1 changed files with 6 additions and 4 deletions
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10
shared/runtime/semihosting_arm.c
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@ -40,10 +40,6 @@
#define OPEN_MODE_READ (0) // mode "r" #define OPEN_MODE_READ (0) // mode "r"
#define OPEN_MODE_WRITE (4) // mode "w" #define OPEN_MODE_WRITE (4) // mode "w"
#ifndef __thumb__
#error Semihosting is only implemented for ARM microcontrollers.
#endif
static int mp_semihosting_stdout; static int mp_semihosting_stdout;
static uint32_t mp_semihosting_call(uint32_t num, const void *arg) { static uint32_t mp_semihosting_call(uint32_t num, const void *arg) {
@ -61,7 +57,13 @@ static uint32_t mp_semihosting_call(uint32_t num, const void *arg) {
register uint32_t num_reg __asm__ ("r0") = num; register uint32_t num_reg __asm__ ("r0") = num;
register const void *args_reg __asm__ ("r1") = arg; register const void *args_reg __asm__ ("r1") = arg;
__asm__ __volatile__ ( __asm__ __volatile__ (
#if defined(__ARM_ARCH_ISA_ARM)
"svc 0x00123456\n" // invoke semihosting call
#elif defined(__ARM_ARCH_ISA_THUMB)
"bkpt 0xAB\n" // invoke semihosting call "bkpt 0xAB\n" // invoke semihosting call
#else
#error Unknown architecture
#endif
: "+r" (num_reg) // call number and result : "+r" (num_reg) // call number and result
: "r" (args_reg) // arguments : "r" (args_reg) // arguments
: "memory"); // make sure args aren't optimized away : "memory"); // make sure args aren't optimized away