kernel/x86_64: add compatibility source files to the build.

* add x86 versions of fnsave frstor.
* add missing declaration for elf32_resolve_symbol().

How-to build a x86_64/x86 bootstrap build:
mkdir generated_bootstrap; cd generated_bootstrap
../configure --bootstrap /dir/to/haikuporter/haikuporter /dir/to/haikuports.cross \
  /dir/to/haikuports --build-cross-tools x86_64 /dir/to/buildtools --build-cross-tools x86 -j8 --use-gcc-pipe
jam -q -sHAIKU_PORTER_EXTRA_OPTIONS="-j8 --sourceforge-mirror=freefr --no-source-packages" @bootstrap-raw

Change-Id: I6eae3653c42a53683ae307107fae595c4b8ebcfb

headers/private/kernel/arch/x86/arch_cpu.h

@@ -579,9 +579,6 @@ void x86_write_msr(uint32 registerNumber, uint64 value);
 void x86_context_switch(struct arch_thread* oldState,
 	struct arch_thread* newState);
 
-void x86_fnsave(void* fpuState);
-void x86_frstor(const void* fpuState);
-
 void x86_fxsave(void* fpuState);
 void x86_fxrstor(const void* fpuState);
 
@@ -592,6 +589,14 @@ void x86_fxsave_swap(void* oldFpuState, const void* newFpuState);
 #endif
 
 
+#if !defined(__x86_64__) || defined(_COMPAT_MODE)
+
+void x86_fnsave(void* fpuState);
+void x86_frstor(const void* fpuState);
+
+#endif // !defined(__x86_64__) || defined(_COMPAT_MODE)
+
+
 static inline void
 arch_cpu_idle(void)
 {

headers/private/kernel/elf_priv.h

@@ -82,6 +82,11 @@ extern "C" {
 extern status_t elf_resolve_symbol(struct elf_image_info* image,
 	elf_sym* symbol, struct elf_image_info* sharedImage,
 	elf_addr* _symbolAddress);
+#ifdef _COMPAT_MODE
+extern status_t elf32_resolve_symbol(struct elf_image_info* image,
+	elf_sym* symbol, struct elf_image_info* sharedImage,
+	elf_addr* _symbolAddress);
+#endif
 
 #ifdef __cplusplus
 }

src/system/kernel/Jamfile

@@ -22,6 +22,12 @@ AddResources kernel_$(TARGET_ARCH) : kernel.rdef ;
 SetVersionScript kernel_$(TARGET_ARCH) : kernel_versions ;
 SetVersionScript kernel.so : kernel_versions ;
 
+local compatSources = ;
+if $(HAIKU_KERNEL_COMPAT_MODE) = 1 {
+	UsePrivateHeaders [ FDirName kernel compat ] ;
+	compatSources = commpage_compat.cpp elf_compat.cpp ;
+}
+
 KernelMergeObject kernel_core.o :
 	boot_item.cpp
 	boot_splash.cpp
@@ -72,6 +78,8 @@ KernelMergeObject kernel_core.o :
 	scheduler_tracing.cpp
 	scheduling_analysis.cpp
 
+	# compatibility
+	$(compatSources)
 	: $(TARGET_KERNEL_PIC_CCFLAGS)
 ;
 

src/system/kernel/arch/x86/64/arch.S

@@ -119,3 +119,25 @@ FUNCTION_END(_stac)
 FUNCTION(_clac):
 	clac
 FUNCTION_END(_clac)
+
+
+#ifdef _COMPAT_MODE
+
+
+/* void x86_fnsave(void *fpu_state); */
+FUNCTION(x86_fnsave):
+	movq	%rdi, %rax
+	fnsave	(%rax)
+	ret
+FUNCTION_END(x86_fnsave)
+
+/* void x86_frstor(const void *fpu_state); */
+FUNCTION(x86_frstor):
+	movq	%rdi, %rax
+	frstor	(%rax)
+	ret
+FUNCTION_END(x86_frstor)
+
+
+#endif // _COMPAT_MODE
+

src/system/kernel/arch/x86/Jamfile

@@ -1,8 +1,5 @@
 SubDir HAIKU_TOP src system kernel arch x86 ;
 
-SubDirHdrs [ FDirName $(TARGET_COMMON_DEBUG_OBJECT_DIR_$(TARGET_PACKAGING_ARCH))
-	system kernel ] ;
-	# for syscall_numbers.h
 SubDirHdrs $(HAIKU_TOP) src add-ons kernel bus_managers ps2 ;
 SubDirHdrs $(HAIKU_TOP) src add-ons kernel bus_managers acpi acpica include ;
 SubDirHdrs $(HAIKU_TOP) src add-ons kernel bus_managers acpi acpica include
@@ -15,6 +12,10 @@ UsePrivateHeaders shared ;
 SEARCH_SOURCE += [ FDirName $(SUBDIR) paging ] ;
 SEARCH_SOURCE += [ FDirName $(SUBDIR) timers ] ;
 
+ObjectHdrs interrupts.S signals.cpp signals_asm.S : [ FDirName
+	$(TARGET_COMMON_DEBUG_OBJECT_DIR_$(TARGET_PACKAGING_ARCH)) system kernel ] ;
+	# for syscall_numbers.h
+
 local archSpecificSources ;
 if $(TARGET_ARCH) = x86_64 {
 	SEARCH_SOURCE += [ FDirName $(SUBDIR) 64 ] ;
@@ -28,6 +29,7 @@ if $(TARGET_ARCH) = x86_64 {
 		signals.cpp
 		signals_asm.S
 		syscalls.cpp
+		syscalls_asm.S
 		thread.cpp
 
 		# paging
@@ -38,6 +40,17 @@ if $(TARGET_ARCH) = x86_64 {
 		X86PagingStructures64Bit.cpp
 		X86VMTranslationMap64Bit.cpp
 	;
+
+	if $(HAIKU_KERNEL_COMPAT_MODE) = 1 {
+		archSpecificSources +=
+			arch_commpage_compat.cpp
+			arch_elf_compat.cpp
+			entry_compat.S
+			syscalls_compat.cpp
+			signals_compat_asm.S
+			signals_compat.cpp
+		;
+	}
 } else {
 	SEARCH_SOURCE += [ FDirName $(SUBDIR) 32 ] ;
 	SEARCH_SOURCE += [ FDirName $(SUBDIR) paging 32bit ] ;
@@ -119,3 +132,16 @@ Includes [ FGristFiles interrupts.S arch.S signals.cpp signals_asm.S ]
 	: <syscalls!$(TARGET_PACKAGING_ARCH)>syscall_numbers.h ;
 Includes [ FGristFiles interrupts.S ]
 	: <syscalls!$(TARGET_PACKAGING_ARCH)>syscall_table.h ;
+
+if $(TARGET_ARCH) = x86_64 && $(HAIKU_KERNEL_COMPAT_MODE) = 1 {
+	ObjectHdrs entry_compat.S syscalls_compat.cpp : [ FDirName
+		$(TARGET_COMMON_DEBUG_OBJECT_DIR_x86) system kernel ] ;
+		# for syscall_numbers.h
+
+	# We need to specify the dependency on the generated syscalls file explicitly.
+	Includes [ FGristFiles entry_compat.S ]
+		: <syscalls!x86>syscall_numbers.h ;
+	Includes [ FGristFiles entry_compat.S syscalls_compat.cpp ]
+		: <syscalls!x86>syscall_table.h ;
+}
+

src/system/kernel/fs/Jamfile

@@ -7,6 +7,10 @@ UsePrivateHeaders net shared storage ;
 
 UseHeaders [ FDirName $(SUBDIR) $(DOTDOT) device_manager ] ;
 
+if $(HAIKU_KERNEL_COMPAT_MODE) = 1 {
+	UsePrivateHeaders [ FDirName kernel compat ] ;
+}
+
 KernelMergeObject kernel_fs.o :
 	EntryCache.cpp
 	fd.cpp

src/system/kernel/vm/Jamfile

@@ -5,6 +5,9 @@ UsePrivateHeaders shared ;
 UseHeaders [ FDirName $(SUBDIR) $(DOTDOT) device_manager ] ;
 UsePrivateHeaders [ FDirName kernel disk_device_manager ] ;
 UsePrivateHeaders [ FDirName kernel util ] ;
+if $(HAIKU_KERNEL_COMPAT_MODE) = 1 {
+	UsePrivateHeaders [ FDirName kernel compat ] ;
+}
 
 KernelMergeObject kernel_vm.o :
 	PageCacheLocker.cpp