[legacy] Add lib with syscalls

Should be used when malloc is required alongside the linker flag `-specs=nosys.specs`.

Signed-off-by: Douglas Reis <[email protected]>

Author: engdoreis

sw/legacy/common/CMakeLists.txt

@@ -4,3 +4,6 @@
 
 add_library(common OBJECT sonata_system.c usbdev.c uart.c timer.c rv_plic.c gpio.c i2c.c pwm.c spi.c crt0.S)
 target_include_directories(common INTERFACE "${CMAKE_CURRENT_SOURCE_DIR}")
+
+
+add_library(syscall OBJECT ../../../vendor/cheriot_debug_module/tb/prog/syscalls.c)