[libcpu][component][debug] add debug info for gdb (#7033)

components/lwp/arch/aarch64/cortex-a/lwp_gcc.S

@@ -9,7 +9,7 @@
  */
 
 #include "rtconfig.h"
-
+#include "asm-generic.h"
 #include "asm-fpu.h"
 
 /*********************
@@ -188,10 +188,9 @@ lwp_exec_user:
 
 /*
  * void SVC_Handler(regs);
+ * since this routine reset the SP, we take it as a start point
  */
-.global SVC_Handler
-.type SVC_Handler, % function
-SVC_Handler:
+START_POINT(SVC_Handler)
     /* x0 is initial sp */
     mov sp, x0
 
@@ -220,6 +219,7 @@ SVC_Handler:
     blr x30
     /* jump explictly, make this code position independant */
     b arch_syscall_exit
+START_POINT_END(SVC_Handler)
 
 .global arch_syscall_exit
 arch_syscall_exit:

components/lwp/arch/arm/cortex-a/lwp_gcc.S

@@ -9,6 +9,7 @@
  */
 
 #include "rtconfig.h"
+#include "asm-generic.h"
 
 #define  Mode_USR       0x10
 #define  Mode_FIQ       0x11
@@ -153,7 +154,7 @@ lwp_exec_user:
  */
 .global vector_swi
 .type vector_swi, % function
-vector_swi:
+START_POINT(vector_swi)
     push {lr}
     mrs lr, spsr
     push {r4, r5, lr}
@@ -179,6 +180,7 @@ vector_swi:
     pop {r0 - r3, r12}
     beq arch_syscall_exit
     blx lr
+START_POINT_END(vector_swi)
 
 .global arch_syscall_exit
 arch_syscall_exit:

components/lwp/arch/risc-v/rv64/lwp_gcc.S

@@ -21,6 +21,7 @@
 #include "cpuport.h"
 #include "encoding.h"
 #include "stackframe.h"
+#include "asm-generic.h"
 
 .section      .text.lwp
 
@@ -269,8 +270,7 @@ arch_fork_exit:
 arch_clone_exit:
     j arch_syscall_exit
 
-.global syscall_entry
-syscall_entry:
+START_POINT(syscall_entry)
 #ifndef ARCH_USING_NEW_CTX_SWITCH
     //swap to thread kernel stack
     csrr t0, sstatus
@@ -319,6 +319,7 @@ copy_context_loop:
     OPEN_INTERRUPT
     call syscall_handler
     j arch_syscall_exit
+START_POINT_END(syscall_entry)
     
 .global arch_syscall_exit
 arch_syscall_exit: