kobj_rename.c revision 1.1.4.2
1 1.1.4.2 rmind /* $NetBSD: kobj_rename.c,v 1.1.4.2 2010/05/30 05:18:06 rmind Exp $ */ 2 1.1.4.2 rmind 3 1.1.4.2 rmind /*- 4 1.1.4.2 rmind * Copyright (c) 2010 Antti Kantee. All Rights Reserved. 5 1.1.4.2 rmind * 6 1.1.4.2 rmind * Redistribution and use in source and binary forms, with or without 7 1.1.4.2 rmind * modification, are permitted provided that the following conditions 8 1.1.4.2 rmind * are met: 9 1.1.4.2 rmind * 1. Redistributions of source code must retain the above copyright 10 1.1.4.2 rmind * notice, this list of conditions and the following disclaimer. 11 1.1.4.2 rmind * 2. Redistributions in binary form must reproduce the above copyright 12 1.1.4.2 rmind * notice, this list of conditions and the following disclaimer in the 13 1.1.4.2 rmind * documentation and/or other materials provided with the distribution. 14 1.1.4.2 rmind * 15 1.1.4.2 rmind * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 16 1.1.4.2 rmind * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 17 1.1.4.2 rmind * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 18 1.1.4.2 rmind * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 19 1.1.4.2 rmind * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 1.1.4.2 rmind * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 21 1.1.4.2 rmind * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 1.1.4.2 rmind * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 1.1.4.2 rmind * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 1.1.4.2 rmind * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 1.1.4.2 rmind * SUCH DAMAGE. 26 1.1.4.2 rmind */ 27 1.1.4.2 rmind 28 1.1.4.2 rmind #include <sys/cdefs.h> 29 1.1.4.2 rmind __KERNEL_RCSID(0, "$NetBSD: kobj_rename.c,v 1.1.4.2 2010/05/30 05:18:06 rmind Exp $"); 30 1.1.4.2 rmind 31 1.1.4.2 rmind #define ELFSIZE ARCH_ELFSIZE 32 1.1.4.2 rmind 33 1.1.4.2 rmind #include <sys/param.h> 34 1.1.4.2 rmind #include <sys/exec_elf.h> 35 1.1.4.2 rmind #include <sys/kmem.h> 36 1.1.4.2 rmind #include <sys/kobj.h> 37 1.1.4.2 rmind #include <sys/systm.h> 38 1.1.4.2 rmind 39 1.1.4.2 rmind /* 40 1.1.4.2 rmind * Mangle symbols into rump kernel namespace. This means 41 1.1.4.2 rmind * putting "rumpns" in front of select symbols. 42 1.1.4.2 rmind * See src/sys/rump/Makefile.rump for more details on the rump kernel 43 1.1.4.2 rmind * namespace. 44 1.1.4.2 rmind */ 45 1.1.4.2 rmind const char *norentab[] = { 46 1.1.4.2 rmind "RUMP", 47 1.1.4.2 rmind "rump", 48 1.1.4.2 rmind "__", 49 1.1.4.2 rmind "_GLOBAL_OFFSET_TABLE", 50 1.1.4.2 rmind }; 51 1.1.4.2 rmind static int 52 1.1.4.2 rmind norename(const char *name) 53 1.1.4.2 rmind { 54 1.1.4.2 rmind unsigned i; 55 1.1.4.2 rmind 56 1.1.4.2 rmind for (i = 0; i < __arraycount(norentab); i++) { 57 1.1.4.2 rmind if (strncmp(norentab[i], name, strlen(norentab[i])) == 0) 58 1.1.4.2 rmind return 1; 59 1.1.4.2 rmind } 60 1.1.4.2 rmind return 0; 61 1.1.4.2 rmind } 62 1.1.4.2 rmind 63 1.1.4.2 rmind #define RUMPNS "rumpns_" 64 1.1.4.2 rmind int 65 1.1.4.2 rmind kobj_renamespace(Elf_Sym *symtab, size_t symcount, 66 1.1.4.2 rmind char **strtab, size_t *strtabsz) 67 1.1.4.2 rmind { 68 1.1.4.2 rmind Elf_Sym *sym; 69 1.1.4.2 rmind char *worktab, *newtab; 70 1.1.4.2 rmind size_t worktabsz, worktabidx; 71 1.1.4.2 rmind unsigned i; 72 1.1.4.2 rmind const size_t prefixlen = strlen(RUMPNS); 73 1.1.4.2 rmind 74 1.1.4.2 rmind #ifndef _RUMP_NATIVE_ABI 75 1.1.4.2 rmind static int warned; 76 1.1.4.2 rmind 77 1.1.4.2 rmind if (!warned) { 78 1.1.4.2 rmind printf("warning: kernel ABI not supported on this arch\n"); 79 1.1.4.2 rmind warned = 1; 80 1.1.4.2 rmind } 81 1.1.4.2 rmind #endif 82 1.1.4.2 rmind 83 1.1.4.2 rmind /* allocate space for worst-case stringtab */ 84 1.1.4.2 rmind worktabsz = *strtabsz + symcount * prefixlen; 85 1.1.4.2 rmind worktab = kmem_alloc(worktabsz, KM_SLEEP); 86 1.1.4.2 rmind 87 1.1.4.2 rmind /* now, adjust stringtab into temporary space */ 88 1.1.4.2 rmind #define WORKTABP (worktab + worktabidx) 89 1.1.4.2 rmind for (i = 0, worktabidx = 0; i < symcount; i++) { 90 1.1.4.2 rmind const char *fromname; 91 1.1.4.2 rmind 92 1.1.4.2 rmind sym = &symtab[i]; 93 1.1.4.2 rmind if (sym->st_name == 0) { 94 1.1.4.2 rmind continue; 95 1.1.4.2 rmind } 96 1.1.4.2 rmind 97 1.1.4.2 rmind fromname = *strtab + sym->st_name; 98 1.1.4.2 rmind sym->st_name = worktabidx; 99 1.1.4.2 rmind 100 1.1.4.2 rmind if (ELF_ST_BIND(sym->st_info) != STB_GLOBAL || 101 1.1.4.2 rmind norename(fromname)) { 102 1.1.4.2 rmind strcpy(WORKTABP, fromname); 103 1.1.4.2 rmind worktabidx += strlen(fromname) + 1; 104 1.1.4.2 rmind } else { 105 1.1.4.2 rmind strcpy(WORKTABP, RUMPNS); 106 1.1.4.2 rmind worktabidx += prefixlen; 107 1.1.4.2 rmind strcpy(WORKTABP, fromname); 108 1.1.4.2 rmind worktabidx += strlen(fromname) + 1; 109 1.1.4.2 rmind } 110 1.1.4.2 rmind KASSERT(worktabidx <= worktabsz); 111 1.1.4.2 rmind } 112 1.1.4.2 rmind #undef WORKTABP 113 1.1.4.2 rmind 114 1.1.4.2 rmind /* 115 1.1.4.2 rmind * Finally, free old strtab, allocate new one, and copy contents. 116 1.1.4.2 rmind */ 117 1.1.4.2 rmind kmem_free(*strtab, *strtabsz); 118 1.1.4.2 rmind *strtab = NULL; /* marvin the paradroid 999 */ 119 1.1.4.2 rmind newtab = kmem_alloc(worktabidx, KM_SLEEP); 120 1.1.4.2 rmind memcpy(newtab, worktab, worktabidx); 121 1.1.4.2 rmind 122 1.1.4.2 rmind kmem_free(worktab, worktabsz); 123 1.1.4.2 rmind 124 1.1.4.2 rmind *strtab = newtab; 125 1.1.4.2 rmind *strtabsz = worktabidx; 126 1.1.4.2 rmind 127 1.1.4.2 rmind return 0; 128 1.1.4.2 rmind } 129
Indexes created Mon Sep 29 21:09:56 GMT 2025