1 /* $NetBSD: cpu_exec.c,v 1.70 2022/09/29 07:00:46 skrll Exp $ */ 2 3 /* 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by Ralph 8 * Campbell. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)machdep.c 8.3 (Berkeley) 1/12/94 35 */ 36 37 #include <sys/cdefs.h> 38 __KERNEL_RCSID(0, "$NetBSD: cpu_exec.c,v 1.70 2022/09/29 07:00:46 skrll Exp $"); 39 40 #include "opt_compat_netbsd.h" 41 #include "opt_compat_ultrix.h" 42 #include "opt_execfmt.h" 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/proc.h> 47 #include <sys/vnode.h> 48 #include <sys/exec.h> 49 #include <sys/namei.h> 50 #include <sys/resourcevar.h> 51 52 #include <uvm/uvm_extern.h> 53 54 #include <compat/common/compat_util.h> 55 56 #ifdef EXEC_ECOFF 57 #include <sys/exec_ecoff.h> 58 #endif 59 #include <sys/exec_elf.h> /* mandatory */ 60 #include <mips/locore.h> 61 #include <mips/reg.h> 62 #include <mips/regnum.h> /* symbolic register indices */ 63 64 #include <compat/common/compat_util.h> 65 66 #ifdef EXEC_ECOFF 67 void 68 cpu_exec_ecoff_setregs(struct lwp *l, struct exec_package *epp, vaddr_t stack) 69 { 70 struct ecoff_exechdr *execp = (struct ecoff_exechdr *)epp->ep_hdr; 71 struct trapframe *tf = l->l_md.md_utf; 72 73 tf->tf_regs[_R_GP] = (register_t)execp->a.gp_value; 74 } 75 76 /* 77 * cpu_exec_ecoff_probe() 78 * cpu-dependent ECOFF format hook for execve(). 79 * 80 * Do any machine-dependent diddling of the exec package when doing ECOFF. 81 */ 82 int 83 cpu_exec_ecoff_probe(struct lwp *l, struct exec_package *epp) 84 { 85 86 /* NetBSD/mips does not have native ECOFF binaries. */ 87 return ENOEXEC; 88 } 89 #endif /* EXEC_ECOFF */ 90 91 #if EXEC_ELF32 92 int 93 mips_netbsd_elf32_probe(struct lwp *l, struct exec_package *epp, void *eh0, 94 char *itp, vaddr_t *start_p) 95 { 96 struct proc * const p = l->l_proc; 97 const Elf32_Ehdr * const eh = eh0; 98 #ifdef DEBUG_EXEC 99 int old_abi = p->p_md.md_abi; 100 #endif /* DEBUG_EXEC */ 101 const char *itp_suffix = NULL; 102 103 /* 104 * Verify we can support the architecture. 105 */ 106 switch (eh->e_flags & EF_MIPS_ARCH) { 107 case EF_MIPS_ARCH_1: 108 break; 109 case EF_MIPS_ARCH_2: 110 if (mips_options.mips_cpu_arch < CPU_ARCH_MIPS2) 111 return ENOEXEC; 112 break; 113 case EF_MIPS_ARCH_3: 114 if (mips_options.mips_cpu_arch < CPU_ARCH_MIPS3) 115 return ENOEXEC; 116 break; 117 case EF_MIPS_ARCH_4: 118 if (mips_options.mips_cpu_arch < CPU_ARCH_MIPS4) 119 return ENOEXEC; 120 break; 121 case EF_MIPS_ARCH_5: 122 if (mips_options.mips_cpu_arch < CPU_ARCH_MIPS5) 123 return ENOEXEC; 124 break; 125 case EF_MIPS_ARCH_32: 126 case EF_MIPS_ARCH_64: 127 if (!CPUISMIPSNN && !CPUISMIPS32R2 && !CPUISMIPS64R2) 128 return ENOEXEC; 129 break; 130 case EF_MIPS_ARCH_32R2: 131 case EF_MIPS_ARCH_64R2: 132 if (!CPUISMIPS32R2 && !CPUISMIPS64R2) 133 return ENOEXEC; 134 break; 135 } 136 137 switch (eh->e_flags & (EF_MIPS_ABI|EF_MIPS_ABI2)) { 138 #if !defined(__mips_o32) 139 case EF_MIPS_ABI2: 140 itp_suffix = "n32"; 141 p->p_md.md_abi = _MIPS_BSD_API_N32; 142 #ifdef DEBUG_EXEC 143 if (old_abi != p->p_md.md_abi) 144 printf("pid %d(%s): ABI set to N32 (e_flags=%#x)\n", p->p_pid, p->p_comm, eh->e_flags); 145 #endif /* DEBUG_EXEC */ 146 break; 147 #endif 148 #ifdef COMPAT_16 149 case 0: 150 *start_p = ELF32_LINK_ADDR; 151 /* FALLTHROUGH */ 152 #endif 153 case EF_MIPS_ABI_O32: 154 itp_suffix = "o32"; 155 p->p_md.md_abi = _MIPS_BSD_API_O32; 156 #ifdef DEBUG_EXEC 157 if (old_abi != p->p_md.md_abi) 158 printf("pid %d(%s): ABI set to O32 (e_flags=%#x)\n", p->p_pid, p->p_comm, eh->e_flags); 159 #endif /* DEBUG_EXEC */ 160 break; 161 default: 162 return ENOEXEC; 163 } 164 165 (void)compat_elf_check_interp(epp, itp, itp_suffix); 166 return 0; 167 } 168 169 void 170 coredump_elf32_setup(struct lwp *l, void *eh0) 171 { 172 struct proc * const p = l->l_proc; 173 Elf32_Ehdr * const eh = eh0; 174 175 /* 176 * Mark the type of CPU that the dump happened on. 177 */ 178 if (mips_options.mips_cpu_arch & CPU_ARCH_MIPS64R2) { 179 eh->e_flags |= EF_MIPS_ARCH_64R2; 180 } else if (mips_options.mips_cpu_arch & CPU_ARCH_MIPS64) { 181 eh->e_flags |= EF_MIPS_ARCH_64; 182 } else if (mips_options.mips_cpu_arch & CPU_ARCH_MIPS32R2) { 183 eh->e_flags |= EF_MIPS_ARCH_32R2; 184 } else if (mips_options.mips_cpu_arch & CPU_ARCH_MIPS32) { 185 eh->e_flags |= EF_MIPS_ARCH_32; 186 } else if (mips_options.mips_cpu_arch & CPU_ARCH_MIPS5) { 187 eh->e_flags |= EF_MIPS_ARCH_5; 188 } else if (mips_options.mips_cpu_arch & CPU_ARCH_MIPS4) { 189 eh->e_flags |= EF_MIPS_ARCH_4; 190 } else if (mips_options.mips_cpu_arch & CPU_ARCH_MIPS3) { 191 eh->e_flags |= EF_MIPS_ARCH_3; 192 } else if (mips_options.mips_cpu_arch & CPU_ARCH_MIPS2) { 193 eh->e_flags |= EF_MIPS_ARCH_2; 194 } else { 195 eh->e_flags |= EF_MIPS_ARCH_1; 196 } 197 198 switch (p->p_md.md_abi) { 199 case _MIPS_BSD_API_N32: 200 eh->e_flags |= EF_MIPS_ABI2; 201 break; 202 case _MIPS_BSD_API_O32: 203 eh->e_flags |= EF_MIPS_ABI_O32; 204 break; 205 } 206 } 207 #endif 208 209 #if EXEC_ELF64 210 int 211 mips_netbsd_elf64_probe(struct lwp *l, struct exec_package *epp, void *eh0, 212 char *itp, vaddr_t *start_p) 213 { 214 struct proc * const p = l->l_proc; 215 const Elf64_Ehdr * const eh = eh0; 216 #ifdef DEBUG_EXEC 217 int old_abi = p->p_md.md_abi; 218 #endif /* DEBUG_EXEC */ 219 const char *itp_suffix = NULL; 220 221 switch (eh->e_flags & EF_MIPS_ARCH) { 222 case EF_MIPS_ARCH_1: 223 return ENOEXEC; 224 case EF_MIPS_ARCH_2: 225 if (mips_options.mips_cpu_arch < CPU_ARCH_MIPS2) 226 return ENOEXEC; 227 break; 228 case EF_MIPS_ARCH_3: 229 if (mips_options.mips_cpu_arch < CPU_ARCH_MIPS3) 230 return ENOEXEC; 231 break; 232 case EF_MIPS_ARCH_4: 233 if (mips_options.mips_cpu_arch < CPU_ARCH_MIPS4) 234 return ENOEXEC; 235 break; 236 case EF_MIPS_ARCH_5: 237 if (mips_options.mips_cpu_arch < CPU_ARCH_MIPS5) 238 return ENOEXEC; 239 break; 240 case EF_MIPS_ARCH_32: 241 case EF_MIPS_ARCH_32R2: 242 return ENOEXEC; 243 case EF_MIPS_ARCH_64: 244 if (!CPUISMIPS64 && !CPUISMIPS64R2) 245 return ENOEXEC; 246 break; 247 case EF_MIPS_ARCH_64R2: 248 if (!CPUISMIPS64R2) 249 return ENOEXEC; 250 break; 251 } 252 253 switch (eh->e_flags & (EF_MIPS_ABI|EF_MIPS_ABI2)) { 254 case 0: 255 itp_suffix = "64"; 256 p->p_md.md_abi = _MIPS_BSD_API_N64; 257 #ifdef DEBUG_EXEC 258 if (old_abi != p->p_md.md_abi) 259 printf("pid %d(%s): ABI set to N64 (e_flags=%#x)\n", p->p_pid, p->p_comm, eh->e_flags); 260 #endif /* DEBUG_EXEC */ 261 break; 262 case EF_MIPS_ABI_O64: 263 itp_suffix = "o64"; 264 p->p_md.md_abi = _MIPS_BSD_API_O64; 265 #ifdef DEBUG_EXEC 266 if (old_abi != p->p_md.md_abi) 267 printf("pid %d(%s): ABI set to O64 (e_flags=%#x)\n", p->p_pid, p->p_comm, eh->e_flags); 268 #endif /* DEBUG_EXEC */ 269 break; 270 default: 271 return ENOEXEC; 272 } 273 274 (void)compat_elf_check_interp(epp, itp, itp_suffix); 275 return 0; 276 } 277 278 void 279 coredump_elf64_setup(struct lwp *l, void *eh0) 280 { 281 struct proc * const p = l->l_proc; 282 Elf64_Ehdr * const eh = eh0; 283 284 /* 285 * Mark the type of CPU that the dump happened on. 286 */ 287 if (mips_options.mips_cpu_arch & CPU_ARCH_MIPS64) { 288 eh->e_flags |= EF_MIPS_ARCH_64; 289 } else if (mips_options.mips_cpu_arch & CPU_ARCH_MIPS32) { 290 eh->e_flags |= EF_MIPS_ARCH_32; 291 } else if (mips_options.mips_cpu_arch & CPU_ARCH_MIPS5) { 292 eh->e_flags |= EF_MIPS_ARCH_5; 293 } else if (mips_options.mips_cpu_arch & CPU_ARCH_MIPS4) { 294 eh->e_flags |= EF_MIPS_ARCH_4; 295 } else if (mips_options.mips_cpu_arch & CPU_ARCH_MIPS3) { 296 eh->e_flags |= EF_MIPS_ARCH_3; 297 } else if (mips_options.mips_cpu_arch & CPU_ARCH_MIPS2) { 298 eh->e_flags |= EF_MIPS_ARCH_2; 299 } else { 300 eh->e_flags |= EF_MIPS_ARCH_1; 301 } 302 switch (p->p_md.md_abi) { 303 case _MIPS_BSD_API_N64: 304 eh->e_flags |= EF_MIPS_ABI2; 305 break; 306 case _MIPS_BSD_API_O64: 307 eh->e_flags |= EF_MIPS_ABI_O64; 308 break; 309 } 310 } 311 #endif 312
Indexes created Sun Sep 21 16:09:51 GMT 2025