[PATCH] uml: s390 preparation, elf.h

This patch make elh.h a symlink to the new arch-specific include files of the
form elf-<subarch>.h, as in the same way already is done for some other
includes.  Also moves Elf-stuff from archparam-<subarch>.h and elf.h to the
new elf-<subarch>.h files.

Signed-off-by: Bodo Stroesser <bstroesser@fujitsu-siemens.com>
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 153 insertions, 21 deletions

diff --git a/include/asm-um/elf.h b/include/asm-um/elf.h
index d41112bfb299..ebf7c63886e0 100644
--- a/include/asm-um/elf.h
+++ b/include/asm-um/elf.h
@@ -1,25 +1,11 @@
-#ifndef __UM_ELF_H
-#define __UM_ELF_H
+/*
+ * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com)
+ * Licensed under the GPL
+ */
+#ifndef __UM_ELF_I386_H
+#define __UM_ELF_I386_H
 
-#include "linux/config.h"
-#include "asm/archparam.h"
-
-extern long elf_aux_hwcap;
-#define ELF_HWCAP (elf_aux_hwcap)
-
-#define SET_PERSONALITY(ex, ibcs2) do ; while(0)
-
-#define ELF_EXEC_PAGESIZE 4096
-
-#define elf_check_arch(x) (1)
-
-#ifdef CONFIG_64BIT
-#define ELF_CLASS ELFCLASS64
-#else
-#define ELF_CLASS ELFCLASS32
-#endif
-
-#define USE_ELF_CORE_DUMP
+#include "user.h"
 
 #if defined(CONFIG_UML_X86) && !defined(CONFIG_64BIT)
 
@@ -61,4 +47,150 @@ extern long elf_aux_hwcap;
 
 #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;
+
+/*
+ * 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)
+
+#define USE_ELF_CORE_DUMP
+#define ELF_EXEC_PAGESIZE 4096
+
+#define ELF_ET_DYN_BASE (2 * TASK_SIZE / 3)
+
+/* 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 long elf_aux_hwcap;
+#define ELF_HWCAP (elf_aux_hwcap)
+
+extern char * elf_aux_platform;
+#define ELF_PLATFORM (elf_aux_platform)
+
+#define SET_PERSONALITY(ex, ibcs2) do ; while(0)
+
+extern unsigned long vsyscall_ehdr;
+extern unsigned long vsyscall_end;
+extern unsigned long __kernel_vsyscall;
+
+#define VSYSCALL_BASE vsyscall_ehdr
+#define VSYSCALL_END vsyscall_end
+
+/*
+ * 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_BASE
+#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)
+
+/*
+ * These macros parameterize elf_core_dump in fs/binfmt_elf.c to write out
+ * extra segments containing the vsyscall DSO contents.  Dumping its
+ * contents makes post-mortem fully interpretable later without matching up
+ * the same kernel and hardware config to see what PC values meant.
+ * Dumping its extra ELF program headers includes all the other information
+ * a debugger needs to easily find how the vsyscall DSO was being used.
+ */
+#define ELF_CORE_EXTRA_PHDRS						      \
+	(vsyscall_ehdr ? (((struct elfhdr *)vsyscall_ehdr)->e_phnum) : 0 )
+
+#define ELF_CORE_WRITE_EXTRA_PHDRS					      \
+if ( vsyscall_ehdr ) {							      \
+	const struct elfhdr *const ehdrp = (struct elfhdr *)vsyscall_ehdr;    \
+	const struct elf_phdr *const phdrp =				      \
+		(const struct elf_phdr *) (vsyscall_ehdr + ehdrp->e_phoff);   \
+	int i;								      \
+	Elf32_Off ofs = 0;						      \
+	for (i = 0; i < ehdrp->e_phnum; ++i) {				      \
+		struct elf_phdr phdr = phdrp[i];			      \
+		if (phdr.p_type == PT_LOAD) {				      \
+			ofs = phdr.p_offset = offset;			      \
+			offset += phdr.p_filesz;			      \
+		}							      \
+		else							      \
+			phdr.p_offset += ofs;				      \
+		phdr.p_paddr = 0; /* match other core phdrs */		      \
+		DUMP_WRITE(&phdr, sizeof(phdr));			      \
+	}								      \
+}
+#define ELF_CORE_WRITE_EXTRA_DATA					      \
+if ( vsyscall_ehdr ) {							      \
+	const struct elfhdr *const ehdrp = (struct elfhdr *)vsyscall_ehdr;    \
+	const struct elf_phdr *const phdrp =				      \
+		(const struct elf_phdr *) (vsyscall_ehdr + ehdrp->e_phoff);   \
+	int i;								      \
+	for (i = 0; i < ehdrp->e_phnum; ++i) {				      \
+		if (phdrp[i].p_type == PT_LOAD)				      \
+			DUMP_WRITE((void *) phdrp[i].p_vaddr,		      \
+				   phdrp[i].p_filesz);			      \
+	}								      \
+}
+
 #endif
+
+/*
+ * Overrides for Emacs so that we follow Linus's tabbing style.
+ * Emacs will notice this stuff at the end of the file and automatically
+ * adjust the settings for this buffer only.  This must remain at the end
+ * of the file.
+ * ---------------------------------------------------------------------------
+ * Local variables:
+ * c-file-style: "linux"
+ * End:
+ */