--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/os/solaris/fix_empty_sec_hdr_flags/fix_empty_sec_hdr_flags.c	Thu May 24 12:03:42 2012 -0700
@@ -0,0 +1,181 @@
+/*
+ * Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code 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
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ *
+ */
+
+/*
+ * Name:        fix_empty_sec_hdr_flags.c
+ *
+ * Description: Remove the SHF_ALLOC flag from "empty" section headers.
+ *     An "empty" section header has sh_addr == 0 and sh_size == 0.
+ *
+ *     This program is adapted from the example program shown on the
+ *     elf(3elf) man page and from code from the Solaris compiler
+ *     driver.
+ */
+
+#include <fcntl.h>
+#include <stdio.h>
+#include <libelf.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+static void failure(void);
+
+void
+main(int argc, char ** argv) {
+    void *        ehdr;           /* ELF header */
+    unsigned int  i;              /* section counter */
+    int           fd;             /* descriptor for file */
+    Elf *         elf;            /* ELF descriptor */
+    char *        elf_ident;      /* ELF identity string */
+    char *        elf_obj;        /* elf_obj file */
+    int           fix_count;      /* number of flags fixed */
+    int           is_elfclass64;  /* is an ELFCLASS64 file? */
+    Elf_Scn *     scn;            /* ELF section descriptor */
+    void *        shdr;           /* ELF section header */
+    Elf_Data *    shstrtab;       /* ELF section header string table */
+
+    if (argc != 2) {
+        (void) fprintf(stderr, "Usage: %s elf_obj\n", argv[0]);
+        exit(2);
+    }
+
+    /* open the elf_obj */
+    elf_obj = argv[1];
+    if ((fd = open(elf_obj, O_RDWR)) == -1) {
+        (void) fprintf(stderr, "%s: cannot open file.\n", elf_obj);
+        exit(3);
+    }
+
+    (void) printf("Opening '%s' for update\n", elf_obj);
+    (void) fflush(stdout);
+    (void) elf_version(EV_CURRENT);  /* coordinate ELF versions */
+
+    /* obtain the ELF descriptors from the input file */
+    if ((elf = elf_begin(fd, ELF_C_RDWR, NULL)) == NULL) {
+        failure();
+    }
+
+    /* determine if ELFCLASS64 or not? */
+    elf_ident = elf_getident(elf, NULL);
+    is_elfclass64 = (elf_ident[EI_CLASS] == ELFCLASS64);
+
+    /* get the ELF header */
+    if (is_elfclass64) {
+        ehdr = elf64_getehdr(elf);
+    } else {
+        ehdr = elf32_getehdr(elf);
+    }
+    if (ehdr == NULL) {
+        failure();
+    }
+
+    /* get the ELF section descriptor */
+    if (is_elfclass64) {
+        scn = elf_getscn(elf, ((Elf64_Ehdr *) ehdr)->e_shstrndx);
+    } else {
+        scn = elf_getscn(elf, ((Elf32_Ehdr *) ehdr)->e_shstrndx);
+    }
+    if (scn == NULL) {
+        failure();
+    }
+
+    /* get the section header string table */
+    shstrtab = elf_getdata(scn, NULL);
+    if (shstrtab == NULL) {
+        failure();
+    }
+
+    fix_count = 0;
+
+    /* traverse the sections of the input file */
+    for (i = 1, scn = NULL; scn = elf_nextscn(elf, scn); i++) {
+        int    has_flag_set;  /* is SHF_ALLOC flag set? */
+        int    is_empty;      /* is section empty? */
+        char * name;          /* short hand pointer */
+
+        /* get the section header */
+        if (is_elfclass64) {
+            shdr = elf64_getshdr(scn);
+        } else {
+            shdr = elf32_getshdr(scn);
+        }
+        if (shdr == NULL) {
+            failure();
+        }
+
+        if (is_elfclass64) {
+            name = (char *)shstrtab->d_buf + ((Elf64_Shdr *) shdr)->sh_name;
+        } else {
+            name = (char *)shstrtab->d_buf + ((Elf32_Shdr *) shdr)->sh_name;
+        }
+
+        if (is_elfclass64) {
+            has_flag_set = ((Elf64_Shdr *) shdr)->sh_flags & SHF_ALLOC;
+            is_empty = ((Elf64_Shdr *) shdr)->sh_addr == 0 &&
+                ((Elf64_Shdr *) shdr)->sh_size == 0;
+        } else {
+            has_flag_set = ((Elf32_Shdr *) shdr)->sh_flags & SHF_ALLOC;
+            is_empty = ((Elf32_Shdr *) shdr)->sh_addr == 0 &&
+                ((Elf32_Shdr *) shdr)->sh_size == 0;
+        }
+
+        if (is_empty && has_flag_set) {
+            (void) printf("section[%u] '%s' is empty, "
+                "but SHF_ALLOC flag is set.\n", i, name);
+            (void) printf("Clearing the SHF_ALLOC flag.\n");
+
+            if (is_elfclass64) {
+                ((Elf64_Shdr *) shdr)->sh_flags &= ~SHF_ALLOC;
+            } else {
+                ((Elf32_Shdr *) shdr)->sh_flags &= ~SHF_ALLOC;
+            }
+            fix_count++;
+        }
+    }  /* end for each ELF section */
+
+    if (fix_count > 0) {
+        (void) printf("Saving %d updates to '%s'\n", fix_count, elf_obj);
+        (void) fflush(stdout);
+        (void) elf_update(elf, ELF_C_NULL);   /* recalc ELF memory structures */
+        (void) elf_update(elf, ELF_C_WRITE);  /* write out changes to ELF obj */
+    } else {
+        (void) printf("No SHF_ALLOC flags needed to be cleared.\n");
+    }
+
+    (void) elf_end(elf);                  /* done with ELF obj */
+    (void) close(fd);
+
+    (void) printf("Done %s '%s'\n",
+               (fix_count > 0) ? "updating" : "with", elf_obj);
+    (void) fflush(stdout);
+    exit(0);
+}  /* end main */
+
+
+static void
+failure() {
+    (void) fprintf(stderr, "%s\n", elf_errmsg(elf_errno()));
+    exit(6);
+}