From a6ee6725b13605b00c37437711db05e47ed80ac6 Mon Sep 17 00:00:00 2001 From: Doug Rabson Date: Fri, 11 Sep 1998 08:47:02 +0000 Subject: [PATCH] Machine dependant relocations for KLD. --- sys/alpha/alpha/elf_machdep.c | 111 ++++++++++++++++++++++++++++++ sys/powerpc/powerpc/elf_machdep.c | 111 ++++++++++++++++++++++++++++++ 2 files changed, 222 insertions(+) create mode 100644 sys/alpha/alpha/elf_machdep.c create mode 100644 sys/powerpc/powerpc/elf_machdep.c diff --git a/sys/alpha/alpha/elf_machdep.c b/sys/alpha/alpha/elf_machdep.c new file mode 100644 index 000000000000..1e7c86d40997 --- /dev/null +++ b/sys/alpha/alpha/elf_machdep.c @@ -0,0 +1,111 @@ +/*- + * 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. + * + * $Id$ + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* Process one elf relocation with addend. */ +int +elf_reloc(linker_file_t lf, const Elf_Rela *rela, const char *sym) +{ + Elf_Addr relocbase = (Elf_Addr) lf->address; + Elf_Addr *where = (Elf_Addr *) (relocbase + rela->r_offset); + + switch (ELF_R_TYPE(rela->r_info)) { + + case R_ALPHA_REFQUAD: { + Elf_Addr addr; + Elf_Addr tmp_value; + + addr = (Elf_Addr) + linker_file_lookup_symbol(lf, sym, 1); + if (addr == NULL) + return -1; + + tmp_value = addr + *where + rela->r_addend; + if (*where != tmp_value) + *where = tmp_value; + } + break; + + case R_ALPHA_GLOB_DAT: { + Elf_Addr addr; + + addr = (Elf_Addr) + linker_file_lookup_symbol(lf, sym, 1); + if (addr == NULL) + return -1; + + if (*where != addr) + *where = addr; + } + break; + + case R_ALPHA_JMP_SLOT: { + /* No point in lazy binding for kernel modules. */ + Elf_Addr addr; + + addr = (Elf_Addr) + linker_file_lookup_symbol(lf, sym, 1); + if (addr == NULL) + return -1; + + if (*where != addr) + *where = addr; + } + break; + + case R_ALPHA_RELATIVE: { + *where += relocbase; + } + break; + + case R_ALPHA_COPY: { + /* + * There shouldn't be copy relocations in kernel + * objects. + */ + printf("kldload: unexpected R_COPY relocation\n"); + return -1; + } + break; + + default: + printf("kldload: unexpected relocation type %d\n", + ELF_R_TYPE(rela->r_info)); + return -1; + } + return(0); +} diff --git a/sys/powerpc/powerpc/elf_machdep.c b/sys/powerpc/powerpc/elf_machdep.c new file mode 100644 index 000000000000..1e7c86d40997 --- /dev/null +++ b/sys/powerpc/powerpc/elf_machdep.c @@ -0,0 +1,111 @@ +/*- + * 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. + * + * $Id$ + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +/* Process one elf relocation with addend. */ +int +elf_reloc(linker_file_t lf, const Elf_Rela *rela, const char *sym) +{ + Elf_Addr relocbase = (Elf_Addr) lf->address; + Elf_Addr *where = (Elf_Addr *) (relocbase + rela->r_offset); + + switch (ELF_R_TYPE(rela->r_info)) { + + case R_ALPHA_REFQUAD: { + Elf_Addr addr; + Elf_Addr tmp_value; + + addr = (Elf_Addr) + linker_file_lookup_symbol(lf, sym, 1); + if (addr == NULL) + return -1; + + tmp_value = addr + *where + rela->r_addend; + if (*where != tmp_value) + *where = tmp_value; + } + break; + + case R_ALPHA_GLOB_DAT: { + Elf_Addr addr; + + addr = (Elf_Addr) + linker_file_lookup_symbol(lf, sym, 1); + if (addr == NULL) + return -1; + + if (*where != addr) + *where = addr; + } + break; + + case R_ALPHA_JMP_SLOT: { + /* No point in lazy binding for kernel modules. */ + Elf_Addr addr; + + addr = (Elf_Addr) + linker_file_lookup_symbol(lf, sym, 1); + if (addr == NULL) + return -1; + + if (*where != addr) + *where = addr; + } + break; + + case R_ALPHA_RELATIVE: { + *where += relocbase; + } + break; + + case R_ALPHA_COPY: { + /* + * There shouldn't be copy relocations in kernel + * objects. + */ + printf("kldload: unexpected R_COPY relocation\n"); + return -1; + } + break; + + default: + printf("kldload: unexpected relocation type %d\n", + ELF_R_TYPE(rela->r_info)); + return -1; + } + return(0); +}