It is possible to enable CONFIG_SEMIHOSTING for STM32F429 target, but it would result in compile error. This patch adds support for semihosting for STM32F429 or any other ARMv7M target. Tested on STM32F429-DISCOVERY board.
Signed-off-by: Vadzim Dambrouski pftbest@gmail.com ---
arch/arm/lib/semihosting.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/arch/arm/lib/semihosting.c b/arch/arm/lib/semihosting.c index c3e964e..6541cb4 100644 --- a/arch/arm/lib/semihosting.c +++ b/arch/arm/lib/semihosting.c @@ -31,6 +31,8 @@ static noinline long smh_trap(unsigned int sysnum, void *addr) register long result asm("r0"); #if defined(CONFIG_ARM64) asm volatile ("hlt #0xf000" : "=r" (result) : "0"(sysnum), "r"(addr)); +#elif defined(CONFIG_CPU_V7M) + asm volatile ("bkpt #0xAB" : "=r" (result) : "0"(sysnum), "r"(addr)); #else /* Note - untested placeholder */ asm volatile ("svc #0x123456" : "=r" (result) : "0"(sysnum), "r"(addr)); @@ -90,7 +92,7 @@ static long smh_read(long fd, void *memp, size_t len) size_t len; } read;
- debug("%s: fd %ld, memp %p, len %lu\n", __func__, fd, memp, len); + debug("%s: fd %ld, memp %p, len %lu\n", __func__, fd, memp, (ulong)len);
read.fd = fd; read.memp = memp; @@ -105,7 +107,7 @@ static long smh_read(long fd, void *memp, size_t len) * with an error message. */ printf("%s: ERROR ret %ld, fd %ld, len %lu memp %p\n", - __func__, ret, fd, len, memp); + __func__, ret, fd, (ulong)len, memp); return -1; }