Syscall instrumentation build system support for Arm and RISC-V

arch/Kconfig

@@ -14,6 +14,7 @@ config ARCH_ARM
 	select ARCH_HAVE_STACKCHECK
 	select ARCH_HAVE_CUSTOMOPT
 	select ARCH_HAVE_STDARG_H
+	select ARCH_HAVE_SYSCALL_HOOKS
 	---help---
 		The ARM architectures
 
@@ -60,6 +61,7 @@ config ARCH_RISCV
 	select ARCH_HAVE_STACKCHECK
 	select ARCH_HAVE_CUSTOMOPT
 	select ARCH_HAVE_STDARG_H
+	select ARCH_HAVE_SYSCALL_HOOKS
 	---help---
 		RISC-V 32 and 64-bit RV32 / RV64 architectures.
 

arch/arm/src/Makefile

@@ -69,6 +69,12 @@ else
   NUTTX = "$(TOPDIR)$(DELIM)nuttx$(EXEEXT)"
 endif
 
+# Additional rules for system call wrapper
+
+ifeq ($(CONFIG_SCHED_INSTRUMENTATION_SYSCALL),y)
+  EXTRALINKCMDS += @$(TOPDIR)/syscall/syscall_wraps.ldcmd
+endif
+
 # The "head" object
 
 HEAD_OBJ = $(HEAD_ASRC:.S=$(OBJEXT))
@@ -99,7 +105,7 @@ UOBJS = $(UAOBJS) $(UCOBJS)
 KBIN = libkarch$(LIBEXT)
 BIN  = libarch$(LIBEXT)
 
-LDFLAGS += $(ARCHSCRIPT)
+LDFLAGS += $(ARCHSCRIPT) $(EXTRALINKCMDS)
 
 # Override in Make.defs if linker is not 'ld'
 

arch/risc-v/src/Makefile

@@ -66,6 +66,12 @@ else
   NUTTX = "$(TOPDIR)$(DELIM)nuttx$(EXEEXT)"
 endif
 
+# Additional rules for system call wrapper
+
+ifeq ($(CONFIG_SCHED_INSTRUMENTATION_SYSCALL),y)
+  EXTRALINKCMDS += @$(TOPDIR)/syscall/syscall_wraps.ldcmd
+endif
+
 # The "head" object
 
 HEAD_OBJ = $(HEAD_ASRC:.S=$(OBJEXT))
@@ -96,7 +102,7 @@ UOBJS = $(UAOBJS) $(UCOBJS)
 KBIN = libkarch$(LIBEXT)
 BIN  = libarch$(LIBEXT)
 
-LDFLAGS += $(ARCHSCRIPT)
+LDFLAGS += $(ARCHSCRIPT) $(EXTRALINKCMDS)
 
 LDSTARTGROUP ?= --start-group
 LDENDGROUP ?= --end-group

sched/Kconfig

@@ -975,7 +975,7 @@ config SCHED_INSTRUMENTATION_SPINLOCKS
 config SCHED_INSTRUMENTATION_SYSCALL
 	bool "System call monitor hooks"
 	default n
-	depends on LIB_SYSCALL && ARCH_HAVE_SYSCALL_HOOKS
+	depends on ARCH_HAVE_SYSCALL_HOOKS
 	---help---
 		Enables additional hooks for entry and exit from system call.
 		Board-specific logic must provide this additional logic.