[PATCH 4/9] semihosting: Support SYS_HEAPINFO when env->boot_info is not set

env->boot_info is only set in some ARM startup paths, so we cannot rely on it to support the SYS_HEAPINFO semihosting function. When not available, fallback to finding a RAM memory region containing the current stack and use the base of that. Signed-off-by: Keith Packard Message-Id: <20201214200

[PATCH 4/9] semihosting: Support SYS_HEAPINFO when env->boot_info is not set

env->boot_info is only set in some ARM startup paths, so we cannot rely on it to support the SYS_HEAPINFO semihosting function. When not available, fallback to finding a RAM memory region containing the current stack and use the base of that. Signed-off-by: Keith Packard --- v2 Explicit