um: merge arch/um/sys-{i386,x86_64}/asm

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>

arch/um/Makefile

@@ -21,10 +21,12 @@ core-y			+= $(ARCH_DIR)/kernel/		\
 MODE_INCLUDE	+= -I$(srctree)/$(ARCH_DIR)/include/shared/skas
 
 include $(srctree)/$(ARCH_DIR)/Makefile-skas
+include $(srctree)/$(ARCH_DIR)/Makefile-$(SUBARCH)
 
 SHARED_HEADERS	:= $(ARCH_DIR)/include/shared
 ARCH_INCLUDE	:= -I$(srctree)/$(SHARED_HEADERS)
 ARCH_INCLUDE	+= -I$(srctree)/$(ARCH_DIR)/sys-$(SUBARCH)/shared
+KBUILD_CPPFLAGS += -I$(srctree)/$(ARCH_DIR)/sys-$(HEADER_ARCH)
 KBUILD_CPPFLAGS += -I$(srctree)/$(ARCH_DIR)/sys-$(SUBARCH)
 
 # -Dvmap=kernel_vmap prevents anything from referencing the libpcap.o symbol so
@@ -46,8 +48,6 @@ USER_CFLAGS = $(patsubst $(KERNEL_DEFINES),,$(patsubst -D__KERNEL__,,\
 	$(patsubst -I%,,$(KBUILD_CFLAGS)))) $(ARCH_INCLUDE) $(MODE_INCLUDE) \
 	$(filter -I%,$(CFLAGS)) -D_FILE_OFFSET_BITS=64 -idirafter include
 
-include $(srctree)/$(ARCH_DIR)/Makefile-$(SUBARCH)
-
 #This will adjust *FLAGS accordingly to the platform.
 include $(srctree)/$(ARCH_DIR)/Makefile-os-$(OS)
 

arch/um/sys-i386/asm/archparam.h → arch/um/sys-x86/asm/archparam.h

@@ -1,10 +1,13 @@
 /* 
  * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
+ * Copyright 2003 PathScale, Inc.
  * Licensed under the GPL
  */
 
-#ifndef __UM_ARCHPARAM_I386_H
-#define __UM_ARCHPARAM_I386_H
+#ifndef __UM_ARCHPARAM_H
+#define __UM_ARCHPARAM_H
+
+#ifdef CONFIG_X86_32
 
 #ifdef CONFIG_X86_PAE
 #define LAST_PKMAP 512
@@ -14,3 +17,4 @@
 
 #endif
 
+#endif

arch/um/sys-x86/asm/checksum.h

@@ -0,0 +1,10 @@
+#ifndef __UM_CHECKSUM_H
+#define __UM_CHECKSUM_H
+
+#ifdef CONFIG_X86_32
+# include "checksum_32.h"
+#else
+# include "checksum_64.h"
+#endif
+
+#endif

arch/um/sys-x86_64/asm/elf.h → arch/um/sys-x86/asm/elf.h

@@ -1,15 +1,103 @@
 /*
- * Copyright 2003 PathScale, Inc.
- * Copyright (C) 2003 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
- *
+ * Copyright (C) 2000 - 2007 Jeff Dike (jdike@{addtoit,linux.intel}.com)
  * Licensed under the GPL
  */
-#ifndef __UM_ELF_X86_64_H
-#define __UM_ELF_X86_64_H
+#ifndef __UM_ELF_X86_H
+#define __UM_ELF_X86_H
 
 #include <asm/user.h>
 #include "skas.h"
 
+#ifdef CONFIG_X86_32
+
+#define R_386_NONE	0
+#define R_386_32	1
+#define R_386_PC32	2
+#define R_386_GOT32	3
+#define R_386_PLT32	4
+#define R_386_COPY	5
+#define R_386_GLOB_DAT	6
+#define R_386_JMP_SLOT	7
+#define R_386_RELATIVE	8
+#define R_386_GOTOFF	9
+#define R_386_GOTPC	10
+#define R_386_NUM	11
+
+/*
+ * This is used to ensure we don't load something for the wrong architecture.
+ */
+#define elf_check_arch(x) \
+	(((x)->e_machine == EM_386) || ((x)->e_machine == EM_486))
+
+#define ELF_CLASS	ELFCLASS32
+#define ELF_DATA        ELFDATA2LSB
+#define ELF_ARCH        EM_386
+
+#define ELF_PLAT_INIT(regs, load_addr) do { \
+	PT_REGS_EBX(regs) = 0; \
+	PT_REGS_ECX(regs) = 0; \
+	PT_REGS_EDX(regs) = 0; \
+	PT_REGS_ESI(regs) = 0; \
+	PT_REGS_EDI(regs) = 0; \
+	PT_REGS_EBP(regs) = 0; \
+	PT_REGS_EAX(regs) = 0; \
+} while (0)
+
+/* Shamelessly stolen from include/asm-i386/elf.h */
+
+#define ELF_CORE_COPY_REGS(pr_reg, regs) do {	\
+	pr_reg[0] = PT_REGS_EBX(regs);		\
+	pr_reg[1] = PT_REGS_ECX(regs);		\
+	pr_reg[2] = PT_REGS_EDX(regs);		\
+	pr_reg[3] = PT_REGS_ESI(regs);		\
+	pr_reg[4] = PT_REGS_EDI(regs);		\
+	pr_reg[5] = PT_REGS_EBP(regs);		\
+	pr_reg[6] = PT_REGS_EAX(regs);		\
+	pr_reg[7] = PT_REGS_DS(regs);		\
+	pr_reg[8] = PT_REGS_ES(regs);		\
+	/* fake once used fs and gs selectors? */	\
+	pr_reg[9] = PT_REGS_DS(regs);		\
+	pr_reg[10] = PT_REGS_DS(regs);		\
+	pr_reg[11] = PT_REGS_SYSCALL_NR(regs);	\
+	pr_reg[12] = PT_REGS_IP(regs);		\
+	pr_reg[13] = PT_REGS_CS(regs);		\
+	pr_reg[14] = PT_REGS_EFLAGS(regs);	\
+	pr_reg[15] = PT_REGS_SP(regs);		\
+	pr_reg[16] = PT_REGS_SS(regs);		\
+} while (0);
+
+extern char * elf_aux_platform;
+#define ELF_PLATFORM (elf_aux_platform)
+
+extern unsigned long vsyscall_ehdr;
+extern unsigned long vsyscall_end;
+extern unsigned long __kernel_vsyscall;
+
+/*
+ * This is the range that is readable by user mode, and things
+ * acting like user mode such as get_user_pages.
+ */
+#define FIXADDR_USER_START      vsyscall_ehdr
+#define FIXADDR_USER_END        vsyscall_end
+
+
+/*
+ * Architecture-neutral AT_ values in 0-17, leave some room
+ * for more of them, start the x86-specific ones at 32.
+ */
+#define AT_SYSINFO		32
+#define AT_SYSINFO_EHDR		33
+
+#define ARCH_DLINFO						\
+do {								\
+	if ( vsyscall_ehdr ) {					\
+		NEW_AUX_ENT(AT_SYSINFO,	__kernel_vsyscall);	\
+		NEW_AUX_ENT(AT_SYSINFO_EHDR, vsyscall_ehdr);	\
+	}							\
+} while (0)
+
+#else
+
 /* x86-64 relocation types, taken from asm-x86_64/elf.h */
 #define R_X86_64_NONE		0	/* No reloc */
 #define R_X86_64_64		1	/* Direct 64 bit  */
@@ -31,13 +119,6 @@
 
 #define R_X86_64_NUM		16
 
-typedef unsigned long elf_greg_t;
-
-#define ELF_NGREG (sizeof (struct user_regs_struct) / sizeof(elf_greg_t))
-typedef elf_greg_t elf_gregset_t[ELF_NGREG];
-
-typedef struct user_i387_struct elf_fpregset_t;
-
 /*
  * This is used to ensure we don't load something for the wrong architecture.
  */
@@ -95,6 +176,30 @@ typedef struct user_i387_struct elf_fpregset_t;
 	(pr_reg)[25] = 0;					\
 	(pr_reg)[26] = 0;
 
+#define ELF_PLATFORM "x86_64"
+
+/* No user-accessible fixmap addresses, i.e. vsyscall */
+#define FIXADDR_USER_START      0
+#define FIXADDR_USER_END        0
+
+#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
+struct linux_binprm;
+extern int arch_setup_additional_pages(struct linux_binprm *bprm,
+	int uses_interp);
+
+extern unsigned long um_vdso_addr;
+#define AT_SYSINFO_EHDR 33
+#define ARCH_DLINFO	NEW_AUX_ENT(AT_SYSINFO_EHDR, um_vdso_addr)
+
+#endif
+
+typedef unsigned long elf_greg_t;
+
+#define ELF_NGREG (sizeof (struct user_regs_struct) / sizeof(elf_greg_t))
+typedef elf_greg_t elf_gregset_t[ELF_NGREG];
+
+typedef struct user_i387_struct elf_fpregset_t;
+
 #define task_pt_regs(t) (&(t)->thread.regs)
 
 struct task_struct;
@@ -103,30 +208,14 @@ extern int elf_core_copy_fpregs(struct task_struct *t, elf_fpregset_t *fpu);
 
 #define ELF_CORE_COPY_FPREGS(t, fpu) elf_core_copy_fpregs(t, fpu)
 
-#ifdef TIF_IA32 /* XXX */
-#error XXX, indeed
-        clear_thread_flag(TIF_IA32);
-#endif
-
 #define ELF_EXEC_PAGESIZE 4096
 
 #define ELF_ET_DYN_BASE (2 * TASK_SIZE / 3)
 
 extern long elf_aux_hwcap;
 #define ELF_HWCAP (elf_aux_hwcap)
 
-#define ELF_PLATFORM "x86_64"
-
 #define SET_PERSONALITY(ex) do ; while(0)
-
 #define __HAVE_ARCH_GATE_AREA 1
-#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
-struct linux_binprm;
-extern int arch_setup_additional_pages(struct linux_binprm *bprm,
-	int uses_interp);
-
-extern unsigned long um_vdso_addr;
-#define AT_SYSINFO_EHDR 33
-#define ARCH_DLINFO	NEW_AUX_ENT(AT_SYSINFO_EHDR, um_vdso_addr)
 
 #endif