remove orig junk in patch

target/linux/patches/4.14.44/vdso2.patch

@@ -25,266 +25,3 @@ diff -Nur linux-4.14.44.orig/arch/x86/entry/vdso/vdso2c.c linux-4.14.44/arch/x86
  struct vdso_sym {
  	const char *name;
  	bool export;
-diff -Nur linux-4.14.44.orig/arch/x86/entry/vdso/vdso2c.c.orig linux-4.14.44/arch/x86/entry/vdso/vdso2c.c.orig
---- linux-4.14.44.orig/arch/x86/entry/vdso/vdso2c.c.orig	1970-01-01 01:00:00.000000000 +0100
-+++ linux-4.14.44/arch/x86/entry/vdso/vdso2c.c.orig	2018-05-25 16:18:02.000000000 +0200
-@@ -0,0 +1,259 @@
-+/*
-+ * vdso2c - A vdso image preparation tool
-+ * Copyright (c) 2014 Andy Lutomirski and others
-+ * Licensed under the GPL v2
-+ *
-+ * vdso2c requires stripped and unstripped input.  It would be trivial
-+ * to fully strip the input in here, but, for reasons described below,
-+ * we need to write a section table.  Doing this is more or less
-+ * equivalent to dropping all non-allocatable sections, but it's
-+ * easier to let objcopy handle that instead of doing it ourselves.
-+ * If we ever need to do something fancier than what objcopy provides,
-+ * it would be straightforward to add here.
-+ *
-+ * We're keep a section table for a few reasons:
-+ *
-+ * The Go runtime had a couple of bugs: it would read the section
-+ * table to try to figure out how many dynamic symbols there were (it
-+ * shouldn't have looked at the section table at all) and, if there
-+ * were no SHT_SYNDYM section table entry, it would use an
-+ * uninitialized value for the number of symbols.  An empty DYNSYM
-+ * table would work, but I see no reason not to write a valid one (and
-+ * keep full performance for old Go programs).  This hack is only
-+ * needed on x86_64.
-+ *
-+ * The bug was introduced on 2012-08-31 by:
-+ * https://code.google.com/p/go/source/detail?r=56ea40aac72b
-+ * and was fixed on 2014-06-13 by:
-+ * https://code.google.com/p/go/source/detail?r=fc1cd5e12595
-+ *
-+ * Binutils has issues debugging the vDSO: it reads the section table to
-+ * find SHT_NOTE; it won't look at PT_NOTE for the in-memory vDSO, which
-+ * would break build-id if we removed the section table.  Binutils
-+ * also requires that shstrndx != 0.  See:
-+ * https://sourceware.org/bugzilla/show_bug.cgi?id=17064
-+ *
-+ * elfutils might not look for PT_NOTE if there is a section table at
-+ * all.  I don't know whether this matters for any practical purpose.
-+ *
-+ * For simplicity, rather than hacking up a partial section table, we
-+ * just write a mostly complete one.  We omit non-dynamic symbols,
-+ * though, since they're rather large.
-+ *
-+ * Once binutils gets fixed, we might be able to drop this for all but
-+ * the 64-bit vdso, since build-id only works in kernel RPMs, and
-+ * systems that update to new enough kernel RPMs will likely update
-+ * binutils in sync.  build-id has never worked for home-built kernel
-+ * RPMs without manual symlinking, and I suspect that no one ever does
-+ * that.
-+ */
-+
-+#include <inttypes.h>
-+#include <stdint.h>
-+#include <unistd.h>
-+#include <stdarg.h>
-+#include <stdlib.h>
-+#include <stdio.h>
-+#include <string.h>
-+#include <fcntl.h>
-+#include <err.h>
-+
-+#include <sys/mman.h>
-+#include <sys/types.h>
-+
-+#include <tools/le_byteshift.h>
-+
-+#include <linux/elf.h>
-+#include <linux/types.h>
-+
-+const char *outfilename;
-+
-+/* Symbols that we need in vdso2c. */
-+enum {
-+	sym_vvar_start,
-+	sym_vvar_page,
-+	sym_hpet_page,
-+	sym_pvclock_page,
-+	sym_hvclock_page,
-+	sym_VDSO_FAKE_SECTION_TABLE_START,
-+	sym_VDSO_FAKE_SECTION_TABLE_END,
-+};
-+
-+const int special_pages[] = {
-+	sym_vvar_page,
-+	sym_hpet_page,
-+	sym_pvclock_page,
-+	sym_hvclock_page,
-+};
-+
-+struct vdso_sym {
-+	const char *name;
-+	bool export;
-+};
-+
-+struct vdso_sym required_syms[] = {
-+	[sym_vvar_start] = {"vvar_start", true},
-+	[sym_vvar_page] = {"vvar_page", true},
-+	[sym_hpet_page] = {"hpet_page", true},
-+	[sym_pvclock_page] = {"pvclock_page", true},
-+	[sym_hvclock_page] = {"hvclock_page", true},
-+	[sym_VDSO_FAKE_SECTION_TABLE_START] = {
-+		"VDSO_FAKE_SECTION_TABLE_START", false
-+	},
-+	[sym_VDSO_FAKE_SECTION_TABLE_END] = {
-+		"VDSO_FAKE_SECTION_TABLE_END", false
-+	},
-+	{"VDSO32_NOTE_MASK", true},
-+	{"__kernel_vsyscall", true},
-+	{"__kernel_sigreturn", true},
-+	{"__kernel_rt_sigreturn", true},
-+	{"int80_landing_pad", true},
-+};
-+
-+__attribute__((format(printf, 1, 2))) __attribute__((noreturn))
-+static void fail(const char *format, ...)
-+{
-+	va_list ap;
-+	va_start(ap, format);
-+	fprintf(stderr, "Error: ");
-+	vfprintf(stderr, format, ap);
-+	if (outfilename)
-+		unlink(outfilename);
-+	exit(1);
-+	va_end(ap);
-+}
-+
-+/*
-+ * Evil macros for little-endian reads and writes
-+ */
-+#define GLE(x, bits, ifnot)						\
-+	__builtin_choose_expr(						\
-+		(sizeof(*(x)) == bits/8),				\
-+		(__typeof__(*(x)))get_unaligned_le##bits(x), ifnot)
-+
-+extern void bad_get_le(void);
-+#define LAST_GLE(x)							\
-+	__builtin_choose_expr(sizeof(*(x)) == 1, *(x), bad_get_le())
-+
-+#define GET_LE(x)							\
-+	GLE(x, 64, GLE(x, 32, GLE(x, 16, LAST_GLE(x))))
-+
-+#define PLE(x, val, bits, ifnot)					\
-+	__builtin_choose_expr(						\
-+		(sizeof(*(x)) == bits/8),				\
-+		put_unaligned_le##bits((val), (x)), ifnot)
-+
-+extern void bad_put_le(void);
-+#define LAST_PLE(x, val)						\
-+	__builtin_choose_expr(sizeof(*(x)) == 1, *(x) = (val), bad_put_le())
-+
-+#define PUT_LE(x, val)					\
-+	PLE(x, val, 64, PLE(x, val, 32, PLE(x, val, 16, LAST_PLE(x, val))))
-+
-+
-+#define NSYMS (sizeof(required_syms) / sizeof(required_syms[0]))
-+
-+#define BITSFUNC3(name, bits, suffix) name##bits##suffix
-+#define BITSFUNC2(name, bits, suffix) BITSFUNC3(name, bits, suffix)
-+#define BITSFUNC(name) BITSFUNC2(name, ELF_BITS, )
-+
-+#define INT_BITS BITSFUNC2(int, ELF_BITS, _t)
-+
-+#define ELF_BITS_XFORM2(bits, x) Elf##bits##_##x
-+#define ELF_BITS_XFORM(bits, x) ELF_BITS_XFORM2(bits, x)
-+#define ELF(x) ELF_BITS_XFORM(ELF_BITS, x)
-+
-+#define ELF_BITS 64
-+#include "vdso2c.h"
-+#undef ELF_BITS
-+
-+#define ELF_BITS 32
-+#include "vdso2c.h"
-+#undef ELF_BITS
-+
-+static void go(void *raw_addr, size_t raw_len,
-+	       void *stripped_addr, size_t stripped_len,
-+	       FILE *outfile, const char *name)
-+{
-+	Elf64_Ehdr *hdr = (Elf64_Ehdr *)raw_addr;
-+
-+	if (hdr->e_ident[EI_CLASS] == ELFCLASS64) {
-+		go64(raw_addr, raw_len, stripped_addr, stripped_len,
-+		     outfile, name);
-+	} else if (hdr->e_ident[EI_CLASS] == ELFCLASS32) {
-+		go32(raw_addr, raw_len, stripped_addr, stripped_len,
-+		     outfile, name);
-+	} else {
-+		fail("unknown ELF class\n");
-+	}
-+}
-+
-+static void map_input(const char *name, void **addr, size_t *len, int prot)
-+{
-+	off_t tmp_len;
-+
-+	int fd = open(name, O_RDONLY);
-+	if (fd == -1)
-+		err(1, "%s", name);
-+
-+	tmp_len = lseek(fd, 0, SEEK_END);
-+	if (tmp_len == (off_t)-1)
-+		err(1, "lseek");
-+	*len = (size_t)tmp_len;
-+
-+	*addr = mmap(NULL, tmp_len, prot, MAP_PRIVATE, fd, 0);
-+	if (*addr == MAP_FAILED)
-+		err(1, "mmap");
-+
-+	close(fd);
-+}
-+
-+int main(int argc, char **argv)
-+{
-+	size_t raw_len, stripped_len;
-+	void *raw_addr, *stripped_addr;
-+	FILE *outfile;
-+	char *name, *tmp;
-+	int namelen;
-+
-+	if (argc != 4) {
-+		printf("Usage: vdso2c RAW_INPUT STRIPPED_INPUT OUTPUT\n");
-+		return 1;
-+	}
-+
-+	/*
-+	 * Figure out the struct name.  If we're writing to a .so file,
-+	 * generate raw output insted.
-+	 */
-+	name = strdup(argv[3]);
-+	namelen = strlen(name);
-+	if (namelen >= 3 && !strcmp(name + namelen - 3, ".so")) {
-+		name = NULL;
-+	} else {
-+		tmp = strrchr(name, '/');
-+		if (tmp)
-+			name = tmp + 1;
-+		tmp = strchr(name, '.');
-+		if (tmp)
-+			*tmp = '\0';
-+		for (tmp = name; *tmp; tmp++)
-+			if (*tmp == '-')
-+				*tmp = '_';
-+	}
-+
-+	map_input(argv[1], &raw_addr, &raw_len, PROT_READ);
-+	map_input(argv[2], &stripped_addr, &stripped_len, PROT_READ);
-+
-+	outfilename = argv[3];
-+	outfile = fopen(outfilename, "w");
-+	if (!outfile)
-+		err(1, "%s", argv[2]);
-+
-+	go(raw_addr, raw_len, stripped_addr, stripped_len, outfile, name);
-+
-+	munmap(raw_addr, raw_len);
-+	munmap(stripped_addr, stripped_len);
-+	fclose(outfile);
-+
-+	return 0;
-+}