[fiber] arm64 contect switch: Use ASM labels instead of jinja templat…

…e magic

src/modm/processing/fiber/context.h

@@ -72,7 +72,7 @@ modm_context_start(modm_context_t *to);
  * to jump from one fiber to the next.
  */
 void
-modm_context_jump(modm_context_t *from, modm_context_t *to);
+modm_context_jump(modm_context_t *from, modm_context_t *to) asm("_modm_context_jump");
 
 /**
  * Switches control from the fiber context back to the main context.

src/modm/processing/fiber/context_arm64.cpp.in → src/modm/processing/fiber/context_arm64.cpp

@@ -57,16 +57,11 @@ constexpr uintptr_t StackWatermark = 0xc0ffee'f00d'facade;
 
 }
 
-extern "C" void modm_context_entry();
+extern "C" void modm_context_entry() asm("_modm_context_entry");
 asm
 (
-%% if is_darwin
 	".globl _modm_context_entry	\n\t"
 	"_modm_context_entry:		\n\t"
-%% else
-	".globl modm_context_entry	\n\t"
-	"modm_context_entry:		\n\t"
-%% endif
 	"ldr x0, [sp]				\n\t" // Load closure data pointer
 	"ldr x1, [sp, #8]			\n\t" // Load closure function
 	"br x1						\n\t" // Jump to closure function
@@ -156,13 +151,8 @@ See https://github.com/boostorg/context/tree/develop/src/asm
 
 asm
 (
-%% if is_darwin
 	".globl _modm_context_jump	\n\t"
 	"_modm_context_jump:		\n\t"
-%% else
-	".globl modm_context_jump	\n\t"
-	"modm_context_jump:			\n\t"
-%% endif
 
 	/* move stack pointer down */
 	"sub sp,  sp,  #0xa0		\n\t"

src/modm/processing/fiber/module.lb

@@ -69,7 +69,7 @@ def build(env):
     elif "arm64" in core:
         env.substitutions["stack_minimum"] = (20 + 2) * 8
         env.substitutions["default_stack_size"] = 2**20 # 1MB
-        env.template("context_arm64.cpp.in")
+        env.copy("context_arm64.cpp")
 
     env.copy("context.h")
     env.template("stack.hpp.in")