sched/signals: add support to partially or fully disable signals

arch/arm/include/arm/irq.h

@@ -129,11 +129,13 @@
 #ifndef __ASSEMBLY__
 struct xcptcontext
 {
+#ifdef CONFIG_ENABLE_ALL_SIGNALS
   /* These are saved copies of the context used during
    * signal processing.
    */
 
   uint32_t *saved_regs;
+#endif
 
   /* Register save area with XCPTCONTEXT_SIZE, only valid when:
    * 1.The task isn't running or

arch/arm/include/armv6-m/irq.h

@@ -158,6 +158,7 @@ struct xcpt_syscall_s
 
 struct xcptcontext
 {
+#ifdef CONFIG_ENABLE_ALL_SIGNALS
   /* These are saved copies of the context used during
    * signal processing.
    */
@@ -171,6 +172,7 @@ struct xcptcontext
 
   uint32_t sigreturn;
 #endif
+#endif
 
 #ifdef CONFIG_LIB_SYSCALL
   /* The following array holds the return address and the exc_return value

arch/arm/include/armv7-a/irq.h

@@ -259,6 +259,7 @@ struct xcpt_syscall_s
 
 struct xcptcontext
 {
+#ifdef CONFIG_ENABLE_ALL_SIGNALS
   /* These are saved copies of the context used during
    * signal processing.
    */
@@ -273,6 +274,7 @@ struct xcptcontext
   uint32_t sigreturn;
 
 #endif
+#endif /* CONFIG_ENABLE_ALL_SIGNALS */
 
   /* Register save area with XCPTCONTEXT_SIZE, only valid when:
    * 1.The task isn't running or

arch/arm/include/armv7-m/irq.h

@@ -214,6 +214,7 @@ struct xcpt_syscall_s
 
 struct xcptcontext
 {
+#ifdef CONFIG_ENABLE_ALL_SIGNALS
   /* These are saved copies of the context used during
    * signal processing.
    */
@@ -228,6 +229,7 @@ struct xcptcontext
   uint32_t sigreturn;
 
 #endif
+#endif /* CONFIG_ENABLE_ALL_SIGNALS */
 
 #ifdef CONFIG_LIB_SYSCALL
   /* The following array holds the return address and the exc_return value

arch/arm/include/armv7-r/irq.h

@@ -259,6 +259,7 @@ struct xcpt_syscall_s
 
 struct xcptcontext
 {
+#ifdef CONFIG_ENABLE_ALL_SIGNALS
   /* These are saved copies of the context used during
    * signal processing.
    */
@@ -272,6 +273,7 @@ struct xcptcontext
 
   uint32_t sigreturn;
 #endif
+#endif /* CONFIG_ENABLE_ALL_SIGNALS */
 
   /* Register save area with XCPTCONTEXT_SIZE, only valid when:
    * 1.The task isn't running or

arch/arm/include/armv8-m/irq.h

@@ -225,6 +225,7 @@ struct xcpt_syscall_s
 
 struct xcptcontext
 {
+#ifdef CONFIG_ENABLE_ALL_SIGNALS
   /* These are saved copies of the context used during
    * signal processing.
    */
@@ -239,6 +240,7 @@ struct xcptcontext
   uint32_t sigreturn;
 
 #endif
+#endif /* CONFIG_ENABLE_ALL_SIGNALS */
 
 #ifdef CONFIG_LIB_SYSCALL
   /* The following array holds the return address and the exc_return value

arch/arm/include/armv8-r/irq.h

@@ -259,6 +259,7 @@ struct xcpt_syscall_s
 
 struct xcptcontext
 {
+#ifdef CONFIG_ENABLE_ALL_SIGNALS
   /* These are saved copies of the context used during
    * signal processing.
    */
@@ -272,6 +273,7 @@ struct xcptcontext
 
   uint32_t sigreturn;
 #endif
+#endif /* CONFIG_ENABLE_ALL_SIGNALS */
 
   /* Register save area with XCPTCONTEXT_SIZE, only valid when:
    * 1.The task isn't running or

arch/arm/include/tlsr82/irq.h

@@ -160,12 +160,13 @@
 #ifndef __ASSEMBLY__
 struct xcptcontext
 {
+#ifdef CONFIG_ENABLE_ALL_SIGNALS
   /* These are saved register array pointer used during
    * signal processing.
    */
 
   uint32_t *saved_regs;
-
+#endif /* CONFIG_ENABLE_ALL_SIGNALS */
   /* Register save area */
 
   uint32_t *regs;

arch/arm/src/arm/CMakeLists.txt

@@ -39,6 +39,10 @@ list(
   arm_vectortab.S
   arm_saveusercontext.S)
 
+if(CONFIG_ENABLE_ALL_SIGNALS)
+  list(APPEND SRCS arm_schedulesigaction.c arm_sigdeliver.c)
+endif()
+
 if(CONFIG_PAGING)
   list(APPEND SRCS arm_pginitialize.c arm_checkmapping.c arm_allocpage.c
        arm_va2pte.c)

arch/arm/src/arm/Make.defs

@@ -27,13 +27,17 @@ include common/Make.defs
 HEAD_ASRC  = arm_head.S
 
 CMN_CSRCS += arm_dataabort.c arm_doirq.c arm_initialstate.c
-CMN_CSRCS += arm_prefetchabort.c arm_schedulesigaction.c
-CMN_CSRCS += arm_sigdeliver.c arm_syscall.c arm_tcbinfo.c
+CMN_CSRCS += arm_prefetchabort.c
+CMN_CSRCS += arm_syscall.c arm_tcbinfo.c
 CMN_CSRCS += arm_undefinedinsn.c
 
 CMN_ASRCS += arm_cache.S arm_vectors.S arm_vectortab.S
 CMN_ASRCS += arm_saveusercontext.S
 
+ifeq ($(CONFIG_ENABLE_ALL_SIGNALS),y)
+CMN_CSRCS += arm_schedulesigaction.c arm_sigdeliver.c
+endif
+
 ifeq ($(CONFIG_LEGACY_PAGING),y)
   CMN_CSRCS += arm_pginitialize.c arm_checkmapping.c arm_allocpage.c arm_va2pte.c
 endif

arch/arm/src/armv6-m/CMakeLists.txt

@@ -27,13 +27,15 @@ set(SRCS
     arm_doirq.c
     arm_hardfault.c
     arm_initialstate.c
-    arm_schedulesigaction.c
-    arm_sigdeliver.c
     arm_svcall.c
     arm_systemreset.c
     arm_tcbinfo.c
     arm_trigger_irq.c)
 
+if(CONFIG_ENABLE_ALL_SIGNALS)
+  list(APPEND SRCS arm_schedulesigaction.c arm_sigdeliver.c)
+endif()
+
 if(NOT CONFIG_ARCH_HAVE_CUSTOM_VECTORS)
   list(APPEND SRCS arm_vectors.c)
 endif()

arch/arm/src/armv6-m/Make.defs

@@ -27,10 +27,14 @@ include common/Make.defs
 CMN_ASRCS += arm_exception.S arm_saveusercontext.S
 
 CMN_CSRCS += arm_cpuinfo.c arm_doirq.c arm_hardfault.c arm_initialstate.c
-CMN_CSRCS += arm_schedulesigaction.c arm_sigdeliver.c arm_svcall.c
+CMN_CSRCS += arm_svcall.c
 CMN_CSRCS += arm_systemreset.c arm_tcbinfo.c
 CMN_CSRCS += arm_trigger_irq.c
 
+ifeq ($(CONFIG_ENABLE_ALL_SIGNALS),y)
+CMN_CSRCS += arm_schedulesigaction.c arm_sigdeliver.c
+endif
+
 ifneq ($(CONFIG_ARCH_HAVE_CUSTOM_VECTORS),y)
   CMN_CSRCS += arm_vectors.c
 endif

arch/arm/src/armv7-a/CMakeLists.txt

@@ -43,14 +43,16 @@ list(
   arm_initialstate.c
   arm_mmu.c
   arm_prefetchabort.c
-  arm_schedulesigaction.c
-  arm_sigdeliver.c
   arm_syscall.c
   arm_tcbinfo.c
   arm_undefinedinsn.c
   arm_perf.c
   cp15_cacheops.c)
 
+if(CONFIG_ENABLE_ALL_SIGNALS)
+  list(APPEND SRCS arm_schedulesigaction.c arm_sigdeliver.c)
+endif()
+
 if(CONFIG_ARMV7A_GICv2M)
   list(APPEND SRCS arm_gicv2m.c)
 endif()

arch/arm/src/armv7-a/Make.defs

@@ -38,10 +38,13 @@ CMN_ASRCS += arm_cpuhead.S arm_vectors.S arm_saveusercontext.S
 CMN_CSRCS += arm_cache.c arm_cpuinfo.c arm_dataabort.c
 CMN_CSRCS += arm_doirq.c arm_gicv2.c arm_gicv2_dump.c
 CMN_CSRCS += arm_initialstate.c arm_mmu.c arm_prefetchabort.c
-CMN_CSRCS += arm_schedulesigaction.c arm_sigdeliver.c
 CMN_CSRCS += arm_syscall.c arm_tcbinfo.c arm_undefinedinsn.c
 CMN_CSRCS += arm_perf.c cp15_cacheops.c
 
+ifeq ($(CONFIG_ENABLE_ALL_SIGNALS),y)
+CMN_CSRCS += arm_schedulesigaction.c arm_sigdeliver.c
+endif
+
 ifeq ($(CONFIG_ARMV7A_GICv2M),y)
   CMN_CSRCS += arm_gicv2m.c
 endif

arch/arm/src/armv7-m/CMakeLists.txt

@@ -34,15 +34,17 @@ set(SRCS
     arm_itm.c
     arm_memfault.c
     arm_perf.c
-    arm_schedulesigaction.c
-    arm_sigdeliver.c
     arm_svcall.c
     arm_systemreset.c
     arm_tcbinfo.c
     arm_trigger_irq.c
     arm_usagefault.c
     arm_dbgmonitor.c)
 
+if(CONFIG_ENABLE_ALL_SIGNALS)
+  list(APPEND SRCS arm_schedulesigaction.c arm_sigdeliver.c)
+endif()
+
 if(NOT CONFIG_ARCH_HAVE_CUSTOM_VECTORS)
   list(APPEND SRCS arm_vectors.c)
 endif()

arch/arm/src/armv7-m/Make.defs

@@ -29,10 +29,13 @@ CMN_ASRCS += arm_exception.S arm_saveusercontext.S
 CMN_CSRCS += arm_busfault.c arm_cache.c arm_cpuinfo.c arm_doirq.c
 CMN_CSRCS += arm_hardfault.c arm_initialstate.c arm_itm.c
 CMN_CSRCS += arm_memfault.c arm_perf.c
-CMN_CSRCS += arm_schedulesigaction.c arm_sigdeliver.c
 CMN_CSRCS += arm_svcall.c arm_systemreset.c arm_tcbinfo.c
 CMN_CSRCS += arm_trigger_irq.c arm_usagefault.c arm_dbgmonitor.c
 
+ifeq ($(CONFIG_ENABLE_ALL_SIGNALS),y)
+CMN_CSRCS += arm_schedulesigaction.c arm_sigdeliver.c
+endif
+
 ifneq ($(CONFIG_ARCH_HAVE_CUSTOM_VECTORS),y)
   CMN_CSRCS += arm_vectors.c
 endif

arch/arm/src/armv7-r/CMakeLists.txt

@@ -39,14 +39,16 @@ list(
   arm_doirq.c
   arm_initialstate.c
   arm_prefetchabort.c
-  arm_schedulesigaction.c
-  arm_sigdeliver.c
   arm_syscall.c
   arm_tcbinfo.c
   arm_undefinedinsn.c
   arm_perf.c
   cp15_cacheops.c)
 
+if(CONFIG_ENABLE_ALL_SIGNALS)
+  list(APPEND SRCS arm_schedulesigaction.c arm_sigdeliver.c)
+endif()
+
 if(NOT CONFIG_ARCH_CHIP STREQUAL tms570)
   list(APPEND SRCS arm_gicv2.c arm_gicv2_dump.c)
 endif()

arch/arm/src/armv7-r/Make.defs

@@ -34,14 +34,17 @@ HEAD_ASRC += arm_vectortab.S
 CMN_CSRCS += arm_cache.c arm_cpuinfo.c arm_dataabort.c
 CMN_CSRCS += arm_doirq.c arm_gicv2.c arm_gicv2_dump.c
 CMN_CSRCS += arm_initialstate.c arm_prefetchabort.c
-CMN_CSRCS += arm_schedulesigaction.c arm_sigdeliver.c
 CMN_CSRCS += arm_syscall.c arm_tcbinfo.c arm_undefinedinsn.c
 CMN_CSRCS += arm_perf.c cp15_cacheops.c
 
 # Common C source files
 
 CMN_ASRCS += arm_head.S arm_vectors.S arm_saveusercontext.S
 
+ifeq ($(CONFIG_ENABLE_ALL_SIGNALS),y)
+CMN_CSRCS += arm_schedulesigaction.c arm_sigdeliver.c
+endif
+
 ifeq ($(CONFIG_ARMV7R_HAVE_PTM), y)
   CMN_CSRCS += arm_timer.c
 endif

arch/arm/src/armv8-m/CMakeLists.txt

@@ -34,16 +34,18 @@ set(SRCS
     arm_memfault.c
     arm_perf.c
     arm_sau.c
-    arm_schedulesigaction.c
     arm_securefault.c
     arm_secure_irq.c
-    arm_sigdeliver.c
     arm_svcall.c
     arm_systemreset.c
     arm_tcbinfo.c
     arm_trigger_irq.c
     arm_usagefault.c)
 
+if(CONFIG_ENABLE_ALL_SIGNALS)
+  list(APPEND SRCS arm_schedulesigaction.c arm_sigdeliver.c)
+endif()
+
 if(NOT CONFIG_ARCH_HAVE_CUSTOM_VECTORS)
   list(APPEND SRCS arm_vectors.c)
 endif()

arch/arm/src/armv8-m/Make.defs

@@ -29,11 +29,15 @@ CMN_ASRCS += arm_exception.S arm_saveusercontext.S
 CMN_CSRCS += arm_busfault.c arm_cache.c arm_cpuinfo.c arm_doirq.c
 CMN_CSRCS += arm_hardfault.c arm_initialstate.c arm_itm.c
 CMN_CSRCS += arm_memfault.c arm_perf.c arm_sau.c
-CMN_CSRCS += arm_schedulesigaction.c arm_securefault.c arm_secure_irq.c
-CMN_CSRCS += arm_sigdeliver.c arm_svcall.c
+CMN_CSRCS += arm_securefault.c arm_secure_irq.c
+CMN_CSRCS += arm_svcall.c
 CMN_CSRCS += arm_systemreset.c arm_tcbinfo.c
 CMN_CSRCS += arm_trigger_irq.c arm_usagefault.c arm_dbgmonitor.c
 
+ifeq ($(CONFIG_ENABLE_ALL_SIGNALS),y)
+CMN_CSRCS += arm_schedulesigaction.c arm_sigdeliver.c
+endif
+
 ifneq ($(CONFIG_ARCH_HAVE_CUSTOM_VECTORS),y)
   CMN_CSRCS += arm_vectors.c
 endif

arch/arm/src/armv8-r/CMakeLists.txt

@@ -41,14 +41,16 @@ list(
   arm_gicv3.c
   arm_initialstate.c
   arm_prefetchabort.c
-  arm_schedulesigaction.c
-  arm_sigdeliver.c
   arm_syscall.c
   arm_tcbinfo.c
   arm_undefinedinsn.c
   arm_perf.c
   cp15_cacheops.c)
 
+if(CONFIG_ENABLE_ALL_SIGNALS)
+  list(APPEND SRCS arm_schedulesigaction.c arm_sigdeliver.c)
+endif()
+
 if(CONFIG_ARCH_FPU)
   list(APPEND SRCS arm_fpucmp.c arm_fpuconfig.S)
 endif()

arch/arm/src/armv8-r/Make.defs

@@ -34,10 +34,13 @@ HEAD_ASRC += arm_vectortab.S
 CMN_CSRCS += arm_timer.c arm_cache.c arm_cpuinfo.c arm_dataabort.c
 CMN_CSRCS += arm_doirq.c arm_gicv3.c
 CMN_CSRCS += arm_initialstate.c arm_prefetchabort.c
-CMN_CSRCS += arm_schedulesigaction.c arm_sigdeliver.c
 CMN_CSRCS += arm_syscall.c arm_tcbinfo.c arm_undefinedinsn.c
 CMN_CSRCS += arm_perf.c cp15_cacheops.c
 
+ifeq ($(CONFIG_ENABLE_ALL_SIGNALS),y)
+CMN_CSRCS += arm_schedulesigaction.c arm_sigdeliver.c
+endif
+
 # Common C source files
 
 CMN_ASRCS += arm_head.S arm_vectors.S arm_saveusercontext.S

arch/arm/src/common/CMakeLists.txt

@@ -52,11 +52,14 @@ if(NOT CONFIG_ARCH_IDLE_CUSTOM)
 endif()
 
 if(CONFIG_BUILD_PROTECTED OR CONFIG_BUILD_KERNEL)
-  list(APPEND SRCS arm_task_start.c arm_pthread_start.c arm_signal_dispatch.c)
+  list(APPEND SRCS arm_task_start.c arm_pthread_start.c)
 
-  if(CONFIG_BUILD_PROTECTED)
-    target_sources(arch_interface
-                   PRIVATE ${ARCH_TOOLCHAIN_PATH}/arm_signal_handler.S)
+  if(CONFIG_ENABLE_ALL_SIGNALS)
+    list(APPEND SRCS arm_signal_dispatch.c)
+    if(CONFIG_BUILD_PROTECTED)
+      target_sources(arch_interface
+                     PRIVATE ${ARCH_TOOLCHAIN_PATH}/arm_signal_handler.S)
+    endif()
   endif()
 endif()