diff options
Diffstat (limited to 'grub-core/kern/x86_64')
| -rw-r--r-- | grub-core/kern/x86_64/dl.c | 121 | ||||
| -rw-r--r-- | grub-core/kern/x86_64/efi/callwrap.S | 129 | ||||
| -rw-r--r-- | grub-core/kern/x86_64/efi/startup.S | 35 | ||||
| -rw-r--r-- | grub-core/kern/x86_64/xen/hypercall.S | 53 | ||||
| -rw-r--r-- | grub-core/kern/x86_64/xen/startup.S | 39 |
5 files changed, 377 insertions, 0 deletions
diff --git a/grub-core/kern/x86_64/dl.c b/grub-core/kern/x86_64/dl.c new file mode 100644 index 0000000..e5a8bdc --- /dev/null +++ b/grub-core/kern/x86_64/dl.c @@ -0,0 +1,121 @@ +/* dl-x86_64.c - arch-dependent part of loadable module support */ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2002,2005,2007,2009 Free Software Foundation, Inc. + * + * GRUB is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * GRUB 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 for more details. + * + * You should have received a copy of the GNU General Public License + * along with GRUB. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <grub/dl.h> +#include <grub/elf.h> +#include <grub/misc.h> +#include <grub/err.h> +#include <grub/i18n.h> + +/* Check if EHDR is a valid ELF header. */ +grub_err_t +grub_arch_dl_check_header (void *ehdr) +{ + Elf64_Ehdr *e = ehdr; + + /* Check the magic numbers. */ + if (e->e_ident[EI_CLASS] != ELFCLASS64 + || e->e_ident[EI_DATA] != ELFDATA2LSB + || e->e_machine != EM_X86_64) + return grub_error (GRUB_ERR_BAD_OS, N_("invalid arch-dependent ELF magic")); + + return GRUB_ERR_NONE; +} + +/* Relocate symbols. */ +grub_err_t +grub_arch_dl_relocate_symbols (grub_dl_t mod, void *ehdr, + Elf_Shdr *s, grub_dl_segment_t seg) +{ + Elf64_Rela *rel, *max; + + for (rel = (Elf64_Rela *) ((char *) ehdr + s->sh_offset), + max = (Elf64_Rela *) ((char *) rel + s->sh_size); + rel < max; + rel = (Elf64_Rela *) ((char *) rel + s->sh_entsize)) + { + Elf64_Word *addr32; + Elf64_Xword *addr64; + Elf64_Sym *sym; + + if (seg->size < rel->r_offset) + return grub_error (GRUB_ERR_BAD_MODULE, + "reloc offset is out of the segment"); + + addr32 = (Elf64_Word *) ((char *) seg->addr + rel->r_offset); + addr64 = (Elf64_Xword *) addr32; + sym = (Elf64_Sym *) ((char *) mod->symtab + + mod->symsize * ELF_R_SYM (rel->r_info)); + + switch (ELF_R_TYPE (rel->r_info)) + { + case R_X86_64_64: + *addr64 += rel->r_addend + sym->st_value; + break; + + case R_X86_64_PC32: + case R_X86_64_PLT32: + { + grub_int64_t value; + value = ((grub_int32_t) *addr32) + rel->r_addend + sym->st_value - + (Elf64_Xword) (grub_addr_t) seg->addr - rel->r_offset; + if (value != (grub_int32_t) value) + return grub_error (GRUB_ERR_BAD_MODULE, "relocation out of range"); + *addr32 = value; + } + break; + + case R_X86_64_PC64: + { + *addr64 += rel->r_addend + sym->st_value - + (Elf64_Xword) (grub_addr_t) seg->addr - rel->r_offset; + } + break; + + case R_X86_64_32: + { + grub_uint64_t value = *addr32 + rel->r_addend + sym->st_value; + if (value != (grub_uint32_t) value) + return grub_error (GRUB_ERR_BAD_MODULE, "relocation out of range"); + *addr32 = value; + } + break; + case R_X86_64_32S: + { + grub_int64_t value = ((grub_int32_t) *addr32) + rel->r_addend + sym->st_value; + if (value != (grub_int32_t) value) + return grub_error (GRUB_ERR_BAD_MODULE, "relocation out of range"); + *addr32 = value; + } + break; + + default: + { + char rel_info[17]; /* log16(2^64) = 16, plus NUL. */ + + grub_snprintf (rel_info, sizeof (rel_info) - 1, "%" PRIxGRUB_UINT64_T, + ELF_R_TYPE (rel->r_info)); + return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET, + N_("relocation 0x%s is not implemented yet"), rel_info); + } + } + } + + return GRUB_ERR_NONE; +} diff --git a/grub-core/kern/x86_64/efi/callwrap.S b/grub-core/kern/x86_64/efi/callwrap.S new file mode 100644 index 0000000..1337fd9 --- /dev/null +++ b/grub-core/kern/x86_64/efi/callwrap.S @@ -0,0 +1,129 @@ +/* callwrap.S - wrapper for x86_64 efi calls */ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2006,2007,2009 Free Software Foundation, Inc. + * + * GRUB is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * GRUB 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 for more details. + * + * You should have received a copy of the GNU General Public License + * along with GRUB. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <config.h> +#include <grub/symbol.h> + +/* + * x86_64 uses registry to pass parameters. Unfortunately, gcc and efi use + * different call conversion, so we need to do some conversion. + * + * gcc: + * %rdi, %rsi, %rdx, %rcx, %r8, %r9, 8(%rsp), 16(%rsp), ... + * + * efi: + * %rcx, %rdx, %r8, %r9, 32(%rsp), 40(%rsp), 48(%rsp), ... + * + */ + + .file "callwrap.S" + .text + +FUNCTION(efi_wrap_0) + subq $40, %rsp + call *%rdi + addq $40, %rsp + ret + +FUNCTION(efi_wrap_1) + subq $40, %rsp + mov %rsi, %rcx + call *%rdi + addq $40, %rsp + ret + +FUNCTION(efi_wrap_2) + subq $40, %rsp + mov %rsi, %rcx + call *%rdi + addq $40, %rsp + ret + +FUNCTION(efi_wrap_3) + subq $40, %rsp + mov %rcx, %r8 + mov %rsi, %rcx + call *%rdi + addq $40, %rsp + ret + +FUNCTION(efi_wrap_4) + subq $40, %rsp + mov %r8, %r9 + mov %rcx, %r8 + mov %rsi, %rcx + call *%rdi + addq $40, %rsp + ret + +FUNCTION(efi_wrap_5) + subq $40, %rsp + mov %r9, 32(%rsp) + mov %r8, %r9 + mov %rcx, %r8 + mov %rsi, %rcx + call *%rdi + addq $40, %rsp + ret + +FUNCTION(efi_wrap_6) + subq $56, %rsp + mov 56+8(%rsp), %rax + mov %rax, 40(%rsp) + mov %r9, 32(%rsp) + mov %r8, %r9 + mov %rcx, %r8 + mov %rsi, %rcx + call *%rdi + addq $56, %rsp + ret + +FUNCTION(efi_wrap_7) + subq $88, %rsp + mov 88+16(%rsp), %rax + mov %rax, 48(%rsp) + mov 88+8(%rsp), %rax + mov %rax, 40(%rsp) + mov %r9, 32(%rsp) + mov %r8, %r9 + mov %rcx, %r8 + mov %rsi, %rcx + call *%rdi + addq $88, %rsp + ret + +FUNCTION(efi_wrap_10) + subq $88, %rsp + mov 88+40(%rsp), %rax + mov %rax, 72(%rsp) + mov 88+32(%rsp), %rax + mov %rax, 64(%rsp) + mov 88+24(%rsp), %rax + mov %rax, 56(%rsp) + mov 88+16(%rsp), %rax + mov %rax, 48(%rsp) + mov 88+8(%rsp), %rax + mov %rax, 40(%rsp) + mov %r9, 32(%rsp) + mov %r8, %r9 + mov %rcx, %r8 + mov %rsi, %rcx + call *%rdi + addq $88, %rsp + ret diff --git a/grub-core/kern/x86_64/efi/startup.S b/grub-core/kern/x86_64/efi/startup.S new file mode 100644 index 0000000..9357e5c --- /dev/null +++ b/grub-core/kern/x86_64/efi/startup.S @@ -0,0 +1,35 @@ +/* startup.S - bootstrap GRUB itself */ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2006,2007,2009 Free Software Foundation, Inc. + * + * GRUB is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * GRUB 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 for more details. + * + * You should have received a copy of the GNU General Public License + * along with GRUB. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <config.h> +#include <grub/symbol.h> + + .file "startup.S" + .text + .globl start, _start + .code64 + +start: +_start: + movq %rcx, EXT_C(grub_efi_image_handle)(%rip) + movq %rdx, EXT_C(grub_efi_system_table)(%rip) + + andq $~0xf, %rsp + call EXT_C(grub_main) + /* Doesn't return. */ diff --git a/grub-core/kern/x86_64/xen/hypercall.S b/grub-core/kern/x86_64/xen/hypercall.S new file mode 100644 index 0000000..9b04db6 --- /dev/null +++ b/grub-core/kern/x86_64/xen/hypercall.S @@ -0,0 +1,53 @@ +/* hypercall.S - wrappers for Xen hypercalls */ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2011 Free Software Foundation, Inc. + * + * GRUB is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * GRUB 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 for more details. + * + * You should have received a copy of the GNU General Public License + * along with GRUB. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <grub/symbol.h> +#include <grub/xen.h> + +FUNCTION(grub_xen_sched_op) + movq $__HYPERVISOR_sched_op, %rax + syscall + ret + +FUNCTION(grub_xen_event_channel_op) + movq $__HYPERVISOR_event_channel_op, %rax + syscall + ret + +FUNCTION(grub_xen_update_va_mapping) + movq $__HYPERVISOR_update_va_mapping, %rax + syscall + ret + +FUNCTION(grub_xen_mmuext_op) + movq %rcx, %r10 + movq $__HYPERVISOR_mmuext_op, %rax + syscall + ret + +FUNCTION(grub_xen_grant_table_op) + movq $__HYPERVISOR_grant_table_op, %rax + syscall + ret + +FUNCTION(grub_xen_mmu_update) + movq %rcx, %r10 + movq $__HYPERVISOR_mmu_update, %rax + syscall + ret diff --git a/grub-core/kern/x86_64/xen/startup.S b/grub-core/kern/x86_64/xen/startup.S new file mode 100644 index 0000000..21a139f --- /dev/null +++ b/grub-core/kern/x86_64/xen/startup.S @@ -0,0 +1,39 @@ +/* startup.S - bootstrap GRUB itself */ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2013 Free Software Foundation, Inc. + * + * GRUB is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * GRUB 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 for more details. + * + * You should have received a copy of the GNU General Public License + * along with GRUB. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <config.h> +#include <grub/symbol.h> + + .file "startup.S" + .text + .globl start, _start + .code64 + +start: +_start: + leaq LOCAL(stack_end), %rsp + movq %rsi, EXT_C(grub_xen_start_page_addr)(%rip) + + andq $~0xf, %rsp + call EXT_C(grub_main) + /* Doesn't return. */ + + .bss + .space (1 << 22) +LOCAL(stack_end): |