Use GPRs only for kernel of x86_64

Doing this guarantees that kernel code does not modify values of SSE/AVX
registers when executing interrupt handler code. SSE/AVX are not part
of of register frame saved when entering interrupt handler code.

Note: generic interrupt handler code will call into specific driver
interrupt handlers (or software interrupt code executed via Cause). This
code can also be writing to SSE/AVX registers and damaging them. This
case is not handled in this commit.

arch/all-pc/exec/mmakefile.src

@@ -23,6 +23,7 @@ FILES := platform_init powerstate_handlers supervisor exec_idle intserver_vblank
 
 # From kernel.resource we need only kernel_syscalls.h
 USER_INCLUDES := $(PRIV_EXEC_INCLUDES)
+USER_CFLAGS   += $(CFLAGS_GENERAL_REGS_ONLY)
 
 %build_archspecific \
   mainmmake=kernel-exec maindir=rom/exec arch=pc \

arch/all-pc/kernel/mmakefile.src

@@ -79,6 +79,7 @@ FILES    := \
 MAINDIR	      := rom/kernel
 USER_INCLUDES  := $(PRIV_KERNEL_INCLUDES) \
 		  -isystem $(SRCDIR)/arch/all-native/bootconsole/include -DAROS_ARCHITECTURE="\"$(AROS_TARGET_PLATFORM)\""
+USER_CFLAGS   += $(CFLAGS_GENERAL_REGS_ONLY)
 
 #MM- kernel-kernel-pc-common : kernel-acpica-sharedlib-linklib linklibs-bootconsole \
 #MM  kernel-kernel-native kernel-acpica-sharedlib-includes

arch/x86_64-all/exec/mmakefile.src

@@ -30,6 +30,7 @@ AFILES := \
 
 USER_AFLAGS   := -I$(GENINCDIR)
 USER_INCLUDES := $(PRIV_EXEC_INCLUDES)
+USER_CFLAGS   += $(CFLAGS_GENERAL_REGS_ONLY)
 
 # Allow to add architecture-specific options
 -include $(SRCDIR)/arch/all-$(FAMILY)/exec/make.opts

arch/x86_64-all/kernel/mmakefile.src

@@ -21,6 +21,7 @@ FILES := cpu_init createcontext
 
 USER_INCLUDES := $(PRIV_KERNEL_INCLUDES) \
 	       -I$(GENINCDIR)
+USER_CFLAGS   += $(CFLAGS_GENERAL_REGS_ONLY)
 USER_CPPFLAGS := -D__AROS_EXEC_LIBRARY__
 
 # Allow to add architecture-specific options

arch/x86_64-pc/exec/mmakefile.src

@@ -12,6 +12,7 @@ AFILES := userstate
 #MM kernel-exec-pc-x86_64 : kernel-kernel-pc-x86_64-includes kernel-exec-includes includes-asm_h
 
 USER_AFLAGS := -isystem $(GENINCDIR)
+USER_CFLAGS += $(CFLAGS_GENERAL_REGS_ONLY)
 
 %build_archspecific \
   mainmmake=kernel-exec maindir=rom/exec arch=pc-x86_64 \

arch/x86_64-pc/kernel/mmakefile.src

@@ -33,6 +33,7 @@ MAINDIR	      := rom/kernel
 USER_AFLAGS   := -I$(GENINCDIR) -I$(SRCDIR)/arch/all-pc/kernel
 USER_INCLUDES := $(PRIV_KERNEL_INCLUDES) -I$(SRCDIR)/arch/all-native/kernel \
 		 -isystem $(SRCDIR)/arch/all-native/bootconsole/include
+USER_CFLAGS   += $(CFLAGS_GENERAL_REGS_ONLY)
 #USER_CPPFLAGS := -DTARGET_SECTION_COMMENT=\"$(AROS_SECTION_COMMENT)\"
 
 #MM kernel-kernel-pc-x86_64 : kernel-pc-acpica-includes includes-asm_h includes kernel-kernel-includes linklibs-bootconsole

rom/exec/mmakefile.src

@@ -58,6 +58,9 @@ PRIV_EXEC_INCLUDES = \
 # platform.h can be overriden in arch-specific directory
 USER_INCLUDES += $(PRIV_EXEC_INCLUDES) -I$(SRCDIR)/rom/debug
 USER_CPPFLAGS := -DAROS_ARCH_$(ARCH)
+ifeq ($(AROS_TARGET_CPU),x86_64)
+USER_CFLAGS += $(CFLAGS_GENERAL_REGS_ONLY)
+endif
 ifeq ($(AROS_TARGET_CPU),m68k)
 # Make sure we optimize this code for size on m68k..
 OPTIMIZATION_CFLAGS := -Os

rom/kernel/mmakefile.src

@@ -29,7 +29,10 @@ PRIV_KERNEL_INCLUDES = \
 
 USER_INCLUDES := $(PRIV_KERNEL_INCLUDES)
 USER_CPPFLAGS := -D__AROS_EXEC_LIBRARY__ \
-	        -DAROS_ARCHITECTURE="\"$(AROS_TARGET_PLATFORM)\"" \
+	        -DAROS_ARCHITECTURE="\"$(AROS_TARGET_PLATFORM)\""
+ifeq ($(AROS_TARGET_CPU),x86_64)
+USER_CFLAGS += $(CFLAGS_GENERAL_REGS_ONLY)
+endif
 
 # Allow to add architecture-specific options
 -include $(SRCDIR)/arch/all-$(FAMILY)/kernel/make.opts

rom/task/mmakefile.src

@@ -24,6 +24,9 @@ USER_CPPFLAGS := \
 #USER_CPPFLAGS += -DDEBUG=1
 USER_LDFLAGS := -noclibs
 USER_INCLUDES += $(PRIV_EXEC_INCLUDES)
+ifeq ($(AROS_TARGET_CPU),x86_64)
+USER_CFLAGS += $(CFLAGS_GENERAL_REGS_ONLY)
+endif
 
 # Allow to add architecture-specific options
 -include $(SRCDIR)/arch/all-$(FAMILY)/exec/make.opts