Adding upstream version 7.0.6-dfsg.upstream/7.0.6-dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 500 insertions, 0 deletions

diff --git a/src/bldprogs/genalias.cpp b/src/bldprogs/genalias.cpp
new file mode 100644
index 00000000..14a29efa
--- /dev/null
+++ b/src/bldprogs/genalias.cpp
@@ -0,0 +1,500 @@
+/* $Id: genalias.cpp $ */
+/** @file
+ * genalias - generate a number of alias objects.
+ *
+ * @note The code has its origin with kLIBC and was added to VBox by the author.
+ */
+
+/*
+ * Copyright (C) 2022 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#include <stdarg.h>
+#include <stdio.h>
+#include <iprt/stdint.h>
+#include <string.h>
+#include <time.h>
+#include <assert.h>
+
+
+/*********************************************************************************************************************************
+*   Defined Constants And Macros                                                                                                 *
+*********************************************************************************************************************************/
+#if defined(RT_OS_DARWIN) || (defined(RT_ARCH_X86) && (defined(RT_OS_WINDOWS) || defined(RT_OS_OS2)))
+# define GENALIAS_UNDERSCORED 1
+#else
+# define GENALIAS_UNDERSCORED 0
+#endif
+
+
+
+static int Error(const char *pszFormat, ...)
+{
+    va_list va;
+    fprintf(stderr, "genalias: error: ");
+    va_start(va, pszFormat);
+    vfprintf(stderr, pszFormat, va);
+    va_end(va);
+    return 1;
+}
+
+static int SyntaxError(const char *pszFormat, ...)
+{
+    va_list va;
+    fprintf(stderr, "genalias: syntax error: ");
+    va_start(va, pszFormat);
+    vfprintf(stderr, pszFormat, va);
+    va_end(va);
+    return 1;
+}
+
+static int WriteAliasObjectAOUT(FILE *pOutput, const char *pszAlias, const char *pszReal)
+{
+#pragma pack(1)
+    /* ASSUMES 32-bit target. */
+    struct AoutHdr
+    {
+        uint32_t a_info;
+        uint32_t a_text;
+        uint32_t a_data;
+        uint32_t a_bss;
+        uint32_t a_syms;
+        uint32_t a_entry;
+        uint32_t a_trsize;
+        uint32_t a_drsize;
+    } Hdr;
+#define OMAGIC 0407
+    struct AoutSym
+    {
+        uint32_t n_strx;
+        uint8_t n_type;
+        int8_t n_other;
+        uint16_t n_desc;
+        uint32_t n_value;
+    } Sym;
+#define N_EXT 1
+#define N_INDR 10
+#pragma pack()
+    const uint32_t cchAlias = (uint32_t)strlen(pszAlias);
+    const uint32_t cchReal  = (uint32_t)strlen(pszReal);
+    uint32_t     u32;
+
+    /* write the header. */
+    memset(&Hdr, 0, sizeof(Hdr));
+    Hdr.a_info = OMAGIC;
+    Hdr.a_syms = 2 * sizeof(Sym);
+    if (fwrite(&Hdr, sizeof(Hdr), 1, pOutput) != 1)
+        return -2;
+
+    /* The alias symbol. */
+    Sym.n_strx = 4 + cchReal + 1 + GENALIAS_UNDERSCORED;
+    Sym.n_type = N_INDR | N_EXT;
+    Sym.n_other = 0;
+    Sym.n_desc = 0;
+    Sym.n_value = 0;
+    if (fwrite(&Sym, sizeof(Sym), 1, pOutput) != 1)
+        return -2;
+
+    /* The real symbol. */
+    Sym.n_strx = 4;
+    Sym.n_type = N_EXT;
+    Sym.n_other = 0;
+    Sym.n_desc = 0;
+    Sym.n_value = 0;
+    if (fwrite(&Sym, sizeof(Sym), 1, pOutput) != 1)
+        return -2;
+
+    /* the string table. */
+    u32 = 4 + cchReal + 1 + cchAlias + 1 + GENALIAS_UNDERSCORED * 2;
+    if (fwrite(&u32, 4, 1, pOutput) != 1)
+        return -2;
+#if GENALIAS_UNDERSCORED
+    if (fputc('_', pOutput) == EOF)
+        return -2;
+#endif
+    if (fwrite(pszReal, cchReal + 1, 1, pOutput) != 1)
+        return -2;
+#if GENALIAS_UNDERSCORED
+    if (fputc('_', pOutput) == EOF)
+        return -2;
+#endif
+    if (fwrite(pszAlias, cchAlias + 1, 1, pOutput) != 1)
+        return -2;
+    return 0;
+}
+
+static int WriteAliasObjectCOFF(FILE *pOutput, const char *pszAlias, const char *pszReal, bool fUnderscored)
+{
+#pragma pack(1)
+    struct CoffHdr
+    {
+        uint16_t Machine;
+        uint16_t NumberOfSections;
+        uint32_t TimeDateStamp;
+        uint32_t PointerToSymbolTable;
+        uint32_t NumberOfSymbols;
+        uint16_t SizeOfOptionalHeader;
+        uint16_t Characteristics;
+    } Hdr;
+    struct CoffShdr
+    {
+        char        Name[8];
+        uint32_t    VirtualSize;
+        uint32_t    VirtualAddress;
+        uint32_t    SizeOfRawData;
+        uint32_t    PointerToRawData;
+        uint32_t    PointerToRelocations;
+        uint32_t    PointerToLinenumbers;
+        uint16_t    NumberOfRelocations;
+        uint16_t    NumberOfLinenumbers;
+        uint32_t    Characteristics;
+    } Shdr;
+#define IMAGE_SCN_LNK_INFO   0x200
+#define IMAGE_SCN_LNK_REMOVE 0x800
+    struct CoffSym
+    {
+        union
+        {
+            char ShortName[8];
+            struct
+            {
+                uint32_t Zeros;
+                uint32_t Offset;
+            } s;
+        } u;
+        uint32_t    Value;
+        uint16_t    SectionNumber;
+        uint16_t    Type;
+        uint8_t     StorageClass;
+        uint8_t     NumberOfAuxSymbols;
+    } Sym;
+#define IMAGE_SYM_UNDEFINED 0
+#define IMAGE_SYM_TYPE_NULL 0
+#define IMAGE_SYM_CLASS_EXTERNAL 2
+#define IMAGE_SYM_CLASS_WEAK_EXTERNAL 105
+    struct CoffAuxWeakExt
+    {
+        uint32_t    TagIndex;
+        uint32_t    Characteristics;
+        uint8_t     padding[10];
+    } Aux;
+#define IMAGE_WEAK_EXTERN_SEARCH_ALIAS 3
+    assert(sizeof(Hdr) == 20); assert(sizeof(Sym) == 18); assert(sizeof(Aux) == sizeof(Sym));
+#pragma pack()
+    const uint32_t cchAlias = (uint32_t)strlen(pszAlias);
+    const uint32_t cchReal  = (uint32_t)strlen(pszReal);
+    uint32_t       u32;
+
+    /* write the header. */
+    Hdr.Machine = 0 /*unknown*/; //0x14c /* i386 */;
+    Hdr.NumberOfSections = 1;
+    Hdr.TimeDateStamp = time(NULL);
+    Hdr.PointerToSymbolTable = sizeof(Hdr) + sizeof(Shdr);
+    Hdr.NumberOfSymbols = 3;
+    Hdr.SizeOfOptionalHeader = 0;
+    Hdr.Characteristics = 0;
+    if (fwrite(&Hdr, sizeof(Hdr), 1, pOutput) != 1)
+        return -2;
+
+    /* The directive section. */
+    if (Hdr.NumberOfSections == 1)
+    {
+        memset(&Shdr, 0, sizeof(Shdr));
+        memcpy(Shdr.Name, ".drectve", 8);
+        Shdr.Characteristics = IMAGE_SCN_LNK_REMOVE | IMAGE_SCN_LNK_INFO;
+        if (fwrite(&Shdr, sizeof(Shdr), 1, pOutput) != 1)
+            return -2;
+    }
+
+    /* The real symbol. */
+    memset(&Sym, 0, sizeof(Sym));
+    Sym.u.s.Offset = 4;
+    Sym.SectionNumber = IMAGE_SYM_UNDEFINED;
+    Sym.Type = IMAGE_SYM_TYPE_NULL;
+    Sym.StorageClass = IMAGE_SYM_CLASS_EXTERNAL;
+    if (fwrite(&Sym, sizeof(Sym), 1, pOutput) != 1)
+        return -2;
+
+    /* The alias symbol. */
+    memset(&Sym, 0, sizeof(Sym));
+    Sym.u.s.Offset = fUnderscored + cchReal + 1 + 4;
+    Sym.SectionNumber = IMAGE_SYM_UNDEFINED;
+    Sym.Type = IMAGE_SYM_TYPE_NULL;
+    Sym.StorageClass = IMAGE_SYM_CLASS_WEAK_EXTERNAL;
+    Sym.NumberOfAuxSymbols = 1;
+    if (fwrite(&Sym, sizeof(Sym), 1, pOutput) != 1)
+        return -2;
+
+    /* aux entry for that. */
+    memset(&Aux, 0, sizeof(Aux));
+    Aux.TagIndex = 0;
+    Aux.Characteristics = IMAGE_WEAK_EXTERN_SEARCH_ALIAS;
+    if (fwrite(&Aux, sizeof(Aux), 1, pOutput) != 1)
+        return -2;
+
+    /* the string table. */
+    u32 = 4 + cchReal + 1 + cchAlias + 1 + fUnderscored * 2;
+    if (fwrite(&u32, 4, 1, pOutput) != 1)
+        return -2;
+    if (fUnderscored)
+        if (fputc('_', pOutput) == EOF)
+            return -2;
+    if (fwrite(pszReal, cchReal + 1, 1, pOutput) != 1)
+        return -2;
+    if (fUnderscored)
+        if (fputc('_', pOutput) == EOF)
+            return -2;
+    if (fwrite(pszAlias, cchAlias + 1, 1, pOutput) != 1)
+        return -2;
+    return 0;
+}
+
+static int WriteAliasObjectTargetCOFF(FILE *pOutput, const char *pszAlias, const char *pszReal)
+{
+    return WriteAliasObjectCOFF(pOutput, pszAlias, pszReal, GENALIAS_UNDERSCORED);
+}
+
+static int WriteAliasObjectX86COFF(FILE *pOutput, const char *pszAlias, const char *pszReal)
+{
+    return WriteAliasObjectCOFF(pOutput, pszAlias, pszReal, true  /*fUnderscored*/);
+}
+
+static int WriteAliasObjectAmd64COFF(FILE *pOutput, const char *pszAlias, const char *pszReal)
+{
+    return WriteAliasObjectCOFF(pOutput, pszAlias, pszReal, false /*fUnderscored*/);
+}
+
+
+static int WriteAliasObjectELF(FILE *pOutput, const char *pszAlias, const char *pszReal)
+{
+    RT_NOREF(pOutput, pszAlias, pszReal);
+    fprintf(stderr, "ELF does not support proper aliasing, only option seems to be adding weak symbols with the strong one.\n");
+    return -1;
+}
+
+static int WriteAliasObjectOMF(FILE *pOutput, const char *pszAlias, const char *pszReal)
+{
+    const uint32_t cchAlias = (uint32_t)strlen(pszAlias);
+    const uint32_t cchReal  = (uint32_t)strlen(pszReal);
+    //const uint32_t cchName  = cchAlias > 250 ? 250 : cchAlias;
+    uint32_t       cch;
+
+    if (cchReal >= 250)
+        return Error("Symbol '%s' is too long!\n", pszReal);
+    if (cchAlias >= 250)
+        return Error("Symbol '%s' is too long!\n", pszAlias);
+
+    /* THEADR */
+    fputc(0x80, pOutput);
+    cch = cchAlias + 2;
+    fputc(cch & 0xff, pOutput);
+    fputc(cch >> 8, pOutput);
+    fputc(cchAlias, pOutput);
+    fwrite(pszAlias, cchAlias, 1, pOutput);
+    fputc(0, pOutput);                  /* CRC */
+
+    /* ALIAS */
+    fputc(0xc6, pOutput);
+    cch = cchAlias + 1 + cchReal + 1 + GENALIAS_UNDERSCORED * 2 + 1;
+    fputc(cch & 0xff, pOutput);
+    fputc(cch >> 8, pOutput);
+    fputc(cchAlias + GENALIAS_UNDERSCORED, pOutput);
+    if (GENALIAS_UNDERSCORED)
+        fputc('_', pOutput);
+    fwrite(pszAlias, cchAlias, 1, pOutput);
+    fputc(cchReal + GENALIAS_UNDERSCORED, pOutput);
+    if (GENALIAS_UNDERSCORED)
+        fputc('_', pOutput);
+    fwrite(pszReal, cchReal, 1, pOutput);
+    fputc(0, pOutput);                  /* CRC */
+
+    /* MODEND32 */
+    fputc(0x8b, pOutput);
+    fputc(2, pOutput);
+    fputc(0, pOutput);
+    fputc(0, pOutput);
+    if (fputc(0, pOutput) == EOF)       /* CRC */
+        return -2;
+    return 0;
+}
+
+static int WriteAliasObjectMACHO(FILE *pOutput, const char *pszAlias, const char *pszReal)
+{
+    RT_NOREF(pOutput, pszAlias, pszReal);
+    fprintf(stderr, "Mach-O support not implemented yet\n");
+    return -1;
+}
+
+static int CreateAlias(char *pszBuf, size_t cchInput, char *pszFileBuf, char *pszFilename,
+                       int (*pfnWriter)(FILE *, const char *, const char *))
+{
+    char *pszAlias = pszBuf;
+    char *pszReal;
+    char *pszFile;
+    FILE *pOutput;
+    int   rc;
+    RT_NOREF(cchInput);
+
+    /*
+     * Parse input.
+     */
+    pszReal = strchr(pszBuf, '=');
+    if (!pszReal)
+        return Error("Malformed request: '%s'\n", pszBuf);
+    *pszReal++ = '\0';
+
+    pszFile = strchr(pszReal, '=');
+    if (pszFile)
+    {
+        *pszFile++ = '\0';
+        strcpy(pszFilename, pszFile);
+    }
+    else
+        strcat(strcpy(pszFilename, pszAlias), ".o");
+
+    /*
+     * Open the output file.
+     */
+    pOutput = fopen(pszFileBuf, "wb");
+    if (!pOutput)
+        return Error("Failed to open '%s' for writing!\n", pszFileBuf);
+    rc = pfnWriter(pOutput, pszAlias, pszReal);
+    if (rc == -2)
+        rc = Error("Write error writing '%s'!\n", pszFileBuf);
+    fclose(pOutput);
+    return rc;
+}
+
+
+static int Syntax(void)
+{
+    printf("syntax: genalias -f <format> -D <output-dir> alias=real[=file] [alias2=real2[=file2] [..]]\n"
+           "    OR\n"
+           "        genalias -f <format> -D <output-dir> -r <response-file>\n"
+           "\n"
+           "Format can be: aout, coff or omf\n"
+           "The responsefile is a single argument per line.\n");
+    return 1;
+}
+
+
+int main(int argc, char **argv)
+{
+    static char s_szBuf[4096];
+    static char s_szFile[1024 + sizeof(s_szBuf)];
+    int (*pfnWriter)(FILE *pOutput, const char *pszAlias, const char *pszReal);
+    char *pszFilename;
+    int i;
+    int rc;
+
+    /*
+     * Parse arguments.
+     */
+    if (argc <= 5)
+        return Syntax();
+    if (strcmp(argv[1], "-f"))
+        return SyntaxError("Expected -f as the 1st argument.\n");
+    if (!strcmp(argv[2], "aout"))
+        pfnWriter = WriteAliasObjectAOUT;
+    else if (!strcmp(argv[2], "coff"))
+        pfnWriter = WriteAliasObjectTargetCOFF;
+    else if (!strcmp(argv[2], "coff.x86"))
+        pfnWriter = WriteAliasObjectX86COFF;
+    else if (!strcmp(argv[2], "coff.amd64"))
+        pfnWriter = WriteAliasObjectAmd64COFF;
+    else if (!strcmp(argv[2], "elf"))
+        pfnWriter = WriteAliasObjectELF;
+    else if (!strcmp(argv[2], "omf"))
+        pfnWriter = WriteAliasObjectOMF;
+    else if (!strcmp(argv[2], "macho"))
+        pfnWriter = WriteAliasObjectMACHO;
+    else
+        return SyntaxError("Unknown format '%s'.\n", argv[2]);
+    if (strcmp(argv[3], "-D"))
+        return SyntaxError("Expected -D as the 3rd argument\n");
+    if (!*argv[4])
+        return SyntaxError("The output directory name is empty.\n");
+    size_t cchFile = strlen(argv[4]);
+    if (cchFile > sizeof(s_szFile) - sizeof(s_szBuf))
+        return SyntaxError("The output directory name is too long.\n");
+    memcpy(s_szFile, argv[4], cchFile);
+    s_szFile[cchFile++] = '/';
+    pszFilename = &s_szFile[cchFile];
+
+    /* anything to do? */
+    if (argc == 5)
+        return 0;
+
+    rc = 0;
+    if (!strcmp(argv[5], "-r"))
+    {
+        /*
+         * Responsefile.
+         */
+        FILE *pResp;
+        if (argc <= 6)
+            return SyntaxError("Missing response file name\n");
+        pResp = fopen(argv[6], "rt");
+        if (!pResp)
+            return Error("Failed to open '%s' for reading.\n", argv[6]);
+
+        i = 0;
+        while (fgets(s_szBuf, sizeof(s_szBuf), pResp))
+        {
+            size_t  cch = strlen(s_szBuf);
+            i++;
+            if (cch == sizeof(s_szBuf) && s_szBuf[cch - 1] != '\n')
+            {
+                rc = Error("Line %d is too long!\n", i);
+                break;
+            }
+            if (cch && s_szBuf[cch - 1] == '\n')
+                s_szBuf[--cch] = '\0';
+            rc = CreateAlias(s_szBuf, cch, s_szFile, pszFilename, pfnWriter);
+            if (rc)
+                break;
+        }
+
+        fclose(pResp);
+    }
+    else
+    {
+        /*
+         * Alias descriptors.
+         */
+        for (i = 5; i < argc; i++)
+        {
+            size_t  cch = strlen(argv[i]);
+            if (cch >= sizeof(s_szBuf))
+                return SyntaxError("Argument %d is too long\n", i);
+            memcpy(s_szBuf, argv[i], cch + 1);
+            rc = CreateAlias(s_szBuf, cch, s_szFile, pszFilename, pfnWriter);
+            if (rc)
+                break;
+        }
+    }
+    return rc;
+}
+