diff options
Diffstat (limited to 'sys/powerpc/powerpc/elf32_machdep.c')
| -rw-r--r-- | sys/powerpc/powerpc/elf32_machdep.c | 269 |
1 files changed, 269 insertions, 0 deletions
diff --git a/sys/powerpc/powerpc/elf32_machdep.c b/sys/powerpc/powerpc/elf32_machdep.c new file mode 100644 index 0000000..1761215 --- /dev/null +++ b/sys/powerpc/powerpc/elf32_machdep.c @@ -0,0 +1,269 @@ +/*- + * Copyright 1996-1998 John D. Polstra. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + * + * $FreeBSD$ + */ + +#include <sys/param.h> +#include <sys/kernel.h> +#include <sys/systm.h> + +#define __ELF_WORD_SIZE 32 + +#include <sys/exec.h> +#include <sys/imgact.h> +#include <sys/malloc.h> +#include <sys/proc.h> +#include <sys/namei.h> +#include <sys/fcntl.h> +#include <sys/sysent.h> +#include <sys/imgact_elf.h> +#include <sys/syscall.h> +#include <sys/signalvar.h> +#include <sys/vnode.h> +#include <sys/linker.h> + +#include <vm/vm.h> +#include <vm/vm_param.h> + +#include <machine/cpu.h> +#include <machine/elf.h> +#include <machine/reg.h> +#include <machine/md_var.h> + +#ifdef __powerpc64__ +#include <compat/freebsd32/freebsd32_proto.h> +#include <compat/freebsd32/freebsd32_util.h> + +extern const char *freebsd32_syscallnames[]; +#endif + +struct sysentvec elf32_freebsd_sysvec = { + .sv_size = SYS_MAXSYSCALL, +#ifdef __powerpc64__ + .sv_table = freebsd32_sysent, +#else + .sv_table = sysent, +#endif + .sv_mask = 0, + .sv_sigsize = 0, + .sv_sigtbl = NULL, + .sv_errsize = 0, + .sv_errtbl = NULL, + .sv_transtrap = NULL, + .sv_fixup = __elfN(freebsd_fixup), + .sv_sendsig = sendsig, + .sv_sigcode = sigcode32, + .sv_szsigcode = &szsigcode32, + .sv_prepsyscall = NULL, + .sv_name = "FreeBSD ELF32", + .sv_coredump = __elfN(coredump), + .sv_imgact_try = NULL, + .sv_minsigstksz = MINSIGSTKSZ, + .sv_pagesize = PAGE_SIZE, + .sv_minuser = VM_MIN_ADDRESS, + .sv_stackprot = VM_PROT_ALL, +#ifdef __powerpc64__ + .sv_maxuser = VM_MAXUSER_ADDRESS, + .sv_usrstack = FREEBSD32_USRSTACK, + .sv_psstrings = FREEBSD32_PS_STRINGS, + .sv_copyout_strings = freebsd32_copyout_strings, + .sv_setregs = ppc32_setregs, + .sv_syscallnames = freebsd32_syscallnames, +#else + .sv_maxuser = VM_MAXUSER_ADDRESS, + .sv_usrstack = USRSTACK, + .sv_psstrings = PS_STRINGS, + .sv_copyout_strings = exec_copyout_strings, + .sv_setregs = exec_setregs, + .sv_syscallnames = syscallnames, +#endif + .sv_fixlimit = NULL, + .sv_maxssiz = NULL, + .sv_flags = SV_ABI_FREEBSD | SV_ILP32, + .sv_set_syscall_retval = cpu_set_syscall_retval, + .sv_fetch_syscall_args = cpu_fetch_syscall_args, +}; + +static Elf32_Brandinfo freebsd_brand_info = { + .brand = ELFOSABI_FREEBSD, + .machine = EM_PPC, + .compat_3_brand = "FreeBSD", + .emul_path = NULL, + .interp_path = "/libexec/ld-elf.so.1", + .sysvec = &elf32_freebsd_sysvec, +#ifdef __powerpc64__ + .interp_newpath = "/libexec/ld-elf32.so.1", +#else + .interp_newpath = NULL, +#endif + .brand_note = &elf32_freebsd_brandnote, + .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE +}; + +SYSINIT(elf32, SI_SUB_EXEC, SI_ORDER_FIRST, + (sysinit_cfunc_t) elf32_insert_brand_entry, + &freebsd_brand_info); + +static Elf32_Brandinfo freebsd_brand_oinfo = { + .brand = ELFOSABI_FREEBSD, + .machine = EM_PPC, + .compat_3_brand = "FreeBSD", + .emul_path = NULL, + .interp_path = "/usr/libexec/ld-elf.so.1", + .sysvec = &elf32_freebsd_sysvec, + .interp_newpath = NULL, + .brand_note = &elf32_freebsd_brandnote, + .flags = BI_CAN_EXEC_DYN | BI_BRAND_NOTE +}; + +SYSINIT(oelf32, SI_SUB_EXEC, SI_ORDER_ANY, + (sysinit_cfunc_t) elf32_insert_brand_entry, + &freebsd_brand_oinfo); + +void +elf32_dump_thread(struct thread *td __unused, void *dst __unused, + size_t *off __unused) +{ +} + +#ifndef __powerpc64__ +/* Process one elf relocation with addend. */ +static int +elf_reloc_internal(linker_file_t lf, Elf_Addr relocbase, const void *data, + int type, int local, elf_lookup_fn lookup) +{ + Elf_Addr *where; + Elf_Half *hwhere; + Elf_Addr addr; + Elf_Addr addend; + Elf_Word rtype, symidx; + const Elf_Rela *rela; + + switch (type) { + case ELF_RELOC_REL: + panic("PPC only supports RELA relocations"); + break; + case ELF_RELOC_RELA: + rela = (const Elf_Rela *)data; + where = (Elf_Addr *) ((uintptr_t)relocbase + rela->r_offset); + hwhere = (Elf_Half *) ((uintptr_t)relocbase + rela->r_offset); + addend = rela->r_addend; + rtype = ELF_R_TYPE(rela->r_info); + symidx = ELF_R_SYM(rela->r_info); + break; + default: + panic("elf_reloc: unknown relocation mode %d\n", type); + } + + switch (rtype) { + + case R_PPC_NONE: + break; + + case R_PPC_ADDR32: /* word32 S + A */ + addr = lookup(lf, symidx, 1); + if (addr == 0) + return -1; + addr += addend; + *where = addr; + break; + + case R_PPC_ADDR16_LO: /* #lo(S) */ + addr = lookup(lf, symidx, 1); + if (addr == 0) + return -1; + /* + * addend values are sometimes relative to sections + * (i.e. .rodata) in rela, where in reality they + * are relative to relocbase. Detect this condition. + */ + if (addr > relocbase && addr <= (relocbase + addend)) + addr = relocbase + addend; + else + addr += addend; + *hwhere = addr & 0xffff; + break; + + case R_PPC_ADDR16_HA: /* #ha(S) */ + addr = lookup(lf, symidx, 1); + if (addr == 0) + return -1; + /* + * addend values are sometimes relative to sections + * (i.e. .rodata) in rela, where in reality they + * are relative to relocbase. Detect this condition. + */ + if (addr > relocbase && addr <= (relocbase + addend)) + addr = relocbase + addend; + else + addr += addend; + *hwhere = ((addr >> 16) + ((addr & 0x8000) ? 1 : 0)) + & 0xffff; + break; + + case R_PPC_RELATIVE: /* word32 B + A */ + *where = elf_relocaddr(lf, relocbase + addend); + break; + + default: + printf("kldload: unexpected relocation type %d\n", + (int) rtype); + return -1; + } + return(0); +} + +int +elf_reloc(linker_file_t lf, Elf_Addr relocbase, const void *data, int type, + elf_lookup_fn lookup) +{ + + return (elf_reloc_internal(lf, relocbase, data, type, 0, lookup)); +} + +int +elf_reloc_local(linker_file_t lf, Elf_Addr relocbase, const void *data, + int type, elf_lookup_fn lookup) +{ + + return (elf_reloc_internal(lf, relocbase, data, type, 1, lookup)); +} + +int +elf_cpu_load_file(linker_file_t lf) +{ + /* Only sync the cache for non-kernel modules */ + if (lf->id != 1) + __syncicache(lf->address, lf->size); + return (0); +} + +int +elf_cpu_unload_file(linker_file_t lf __unused) +{ + + return (0); +} +#endif |
