Makefile

@@ -23,7 +23,7 @@ EXPORT_UNPREFIXED := yes
 FREESTANDING := no
 
 ifeq ($(FREESTANDING),yes)
-	CFLAGS += -DFREESTANDING -isystem arch/${ARCH}/freestanding
+	CFLAGS += -DFREESTANDING
 	EXPORT_UNPREFIXED = no
 endif
 
@@ -215,13 +215,13 @@ examples/cooperative_threading: examples/cooperative_threading.c ${LIBUCONTEXT_N
 
 ifeq ($(FREESTANDING),no)
 
-include/libucontext/bits.h: arch/common/bits.h
-	cp arch/common/bits.h $@
+include/libucontext/bits.h: arch/common/include/libucontext/bits.h
+	cp $< $@
 
 else
 
-include/libucontext/bits.h: arch/${ARCH}/freestanding/bits.h
-	cp arch/${ARCH}/freestanding/bits.h $@
+include/libucontext/bits.h: arch/${ARCH}/include/libucontext/bits.h
+	cp $< $@
 
 endif
 

arch/aarch64/getcontext.S

@@ -15,7 +15,11 @@
 ALIAS(getcontext, libucontext_getcontext)
 ALIAS(__getcontext, libucontext_getcontext)
 
-FUNC(libucontext_getcontext)
+	.global PROC_NAME(libucontext_getcontext);
+	.align  2;
+	TYPE(libucontext_getcontext)
+	ENT(libucontext_getcontext)
+PROC_NAME(libucontext_getcontext):
 	str	xzr, [x0, #REG_OFFSET(0)]
 
 	/* save GPRs */

arch/aarch64/setcontext.S

@@ -15,7 +15,11 @@
 ALIAS(setcontext, libucontext_setcontext)
 ALIAS(__setcontext, libucontext_setcontext)
 
-FUNC(libucontext_setcontext)
+	.global PROC_NAME(libucontext_setcontext);
+	.align  2;
+	TYPE(libucontext_setcontext)
+	ENT(libucontext_setcontext)
+PROC_NAME(libucontext_setcontext):
 	/* restore GPRs */
 	ldp	x18, x19, [x0, #REG_OFFSET(18)]
 	ldp	x20, x21, [x0, #REG_OFFSET(20)]

arch/aarch64/swapcontext.S

@@ -15,7 +15,11 @@
 ALIAS(swapcontext, libucontext_swapcontext)
 ALIAS(__swapcontext, libucontext_swapcontext)
 
-FUNC(libucontext_swapcontext)
+	.global PROC_NAME(libucontext_swapcontext);
+	.align  2;
+	TYPE(libucontext_swapcontext)
+	ENT(libucontext_swapcontext)
+PROC_NAME(libucontext_swapcontext):
 	str	xzr, [x0, #REG_OFFSET(0)]
 
 	/* save GPRs */

arch/x86/defs.h

@@ -1,7 +1,6 @@
 #ifndef __ARCH_X86_DEFS_H
 #define __ARCH_X86_DEFS_H
 
-#ifndef _GNU_SOURCE
 #ifndef REG_GS
 # define REG_GS		(0)
 #endif
@@ -53,7 +52,6 @@
 #ifndef REG_EIP
 # define REG_EIP	(14)
 #endif
-#endif
 
 #define REG_SZ		(4)
 

arch/x86_64/defs.h

@@ -1,29 +1,95 @@
 #ifndef __ARCH_X86_64_DEFS_H
 #define __ARCH_X86_64_DEFS_H
 
-#ifndef _GNU_SOURCE
+#ifndef REG_R8
 # define REG_R8		(0)
+#endif
+
+#ifndef REG_R9
 # define REG_R9		(1)
+#endif
+
+#ifndef REG_R10
 # define REG_R10	(2)
+#endif
+
+#ifndef REG_R11
 # define REG_R11	(3)
+#endif
+
+#ifndef REG_R12
 # define REG_R12	(4)
+#endif
+
+#ifndef REG_R13
 # define REG_R13	(5)
+#endif
+
+#ifndef REG_R14
 # define REG_R14	(6)
+#endif
+
+#ifndef REG_R15
 # define REG_R15	(7)
+#endif
+
+#ifndef REG_RDI
 # define REG_RDI	(8)
+#endif
+
+#ifndef REG_RSI
 # define REG_RSI	(9)
+#endif
+
+#ifndef REG_RBP
 # define REG_RBP	(10)
+#endif
+
+#ifndef REG_RBX
 # define REG_RBX	(11)
+#endif
+
+#ifndef REG_RDX
 # define REG_RDX	(12)
+#endif
+
+#ifndef REG_RAX
 # define REG_RAX	(13)
+#endif
+
+#ifndef REG_RCX
 # define REG_RCX	(14)
+#endif
+
+#ifndef REG_RSP
 # define REG_RSP	(15)
+#endif
+
+#ifndef REG_RIP
 # define REG_RIP	(16)
+#endif
+
+#ifndef REG_EFL
 # define REG_EFL	(17)
+#endif
+
+#ifndef REG_CSGSFS
 # define REG_CSGSFS	(18)
+#endif
+
+#ifndef REG_ERR
 # define REG_ERR	(19)
+#endif
+
+#ifndef REG_TRAPNO
 # define REG_TRAPNO	(20)
+#endif
+
+#ifndef REG_OLDMASK
 # define REG_OLDMASK	(21)
+#endif
+
+#ifndef REG_CR2
 # define REG_CR2	(22)
 #endif
 

meson.build

@@ -70,9 +70,11 @@ if freestanding
   build_args += '-DFREESTANDING'
   build_posix = false
   export_unprefixed = false
-  project_headers += ['arch' / cpu / 'freestanding/bits.h']
+  project_headers += ['arch' / cpu / 'include/libucontext/bits.h']
+  project_includes += ['arch' / cpu / 'include']
 else
-  project_headers += ['arch/common/bits.h']
+  project_headers += ['arch/common/include/libucontext/bits.h']
+  project_includes += ['arch/common/include']
 endif
 
 if export_unprefixed