diff --git a/grub-core/kern/dl.c b/grub-core/kern/dl.c index 02d785b9b..2f2493fca 100644 --- a/grub-core/kern/dl.c +++ b/grub-core/kern/dl.c @@ -37,6 +37,10 @@ #define GRUB_MODULES_MACHINE_READONLY #endif +#ifdef GRUB_MACHINE_EMU +#include +#endif + grub_dl_t grub_dl_head = 0; @@ -233,11 +237,24 @@ grub_dl_load_segments (grub_dl_t mod, const Elf_Ehdr *e) if (s->sh_flags & SHF_ALLOC) { grub_dl_segment_t seg; + grub_size_t tramp_size = 0; seg = (grub_dl_segment_t) grub_malloc (sizeof (*seg)); if (! seg) return grub_errno; + tramp_size = grub_arch_dl_get_tramp_size (e, i); + if (tramp_size && s->sh_addralign < GRUB_ARCH_DL_TRAMP_ALIGN) + { + s->sh_addralign = GRUB_ARCH_DL_TRAMP_ALIGN; + s->sh_size = ALIGN_UP (s->sh_size, GRUB_ARCH_DL_TRAMP_ALIGN) + tramp_size; + } +#ifdef GRUB_MACHINE_EMU + if (s->sh_addralign < 8192) + s->sh_addralign = 8192; + s->sh_size = ALIGN_UP (s->sh_size, 8192); +#endif + if (s->sh_size) { void *addr; @@ -260,6 +277,10 @@ grub_dl_load_segments (grub_dl_t mod, const Elf_Ehdr *e) } seg->addr = addr; +#ifdef GRUB_MACHINE_EMU + if (s->sh_flags & SHF_EXECINSTR) + mprotect (addr, s->sh_size, PROT_READ | PROT_WRITE | PROT_EXEC); +#endif } else seg->addr = 0; @@ -343,9 +364,9 @@ grub_dl_resolve_symbols (grub_dl_t mod, Elf_Ehdr *e) return grub_errno; if (grub_strcmp (name, "grub_mod_init") == 0) - mod->init = (void (*) (grub_dl_t)) sym->st_value; + mod->init = sym->st_value; else if (grub_strcmp (name, "grub_mod_fini") == 0) - mod->fini = (void (*) (void)) sym->st_value; + mod->fini = sym->st_value; break; case STT_SECTION: @@ -370,7 +391,16 @@ static void grub_dl_call_init (grub_dl_t mod) { if (mod->init) - (mod->init) (mod); + { +#ifndef __ia64__ + ((void (*) (grub_dl_t)) mod->init) (mod); +#else + char *jmp[2]; + jmp[0] = (char *) mod->init; + jmp[1] = mod->gp; + ((void (*) (grub_dl_t)) jmp) (mod); +#endif + } } static grub_err_t @@ -533,7 +563,7 @@ grub_dl_load_core (void *addr, grub_size_t size) grub_dl_flush_cache (mod); grub_dprintf ("modules", "module name: %s\n", mod->name); - grub_dprintf ("modules", "init function: %p\n", mod->init); + grub_dprintf ("modules", "init function: %" PRIxGRUB_ADDR "\n", mod->init); grub_dl_call_init (mod); if (grub_dl_add (mod)) @@ -633,7 +663,16 @@ grub_dl_unload (grub_dl_t mod) return 0; if (mod->fini) - (mod->fini) (); + { +#ifndef __ia64__ + ((void (*) (void)) mod->fini) (); +#else + char *jmp[2]; + jmp[0] = (char *) mod->fini; + jmp[1] = mod->gp; + ((void (*) (void)) jmp) (); +#endif + } grub_dl_remove (mod); grub_dl_unregister_symbols (mod); diff --git a/grub-core/kern/emu/cache.S b/grub-core/kern/emu/cache.S index 90a5b5396..99637762a 100644 --- a/grub-core/kern/emu/cache.S +++ b/grub-core/kern/emu/cache.S @@ -10,6 +10,7 @@ #include "../mips/cache.S" #elif defined(__powerpc__) #include "../powerpc/cache.S" +#elif defined(__ia64__) #else #error "No target cpu type is defined" #endif diff --git a/grub-core/kern/emu/cache.c b/grub-core/kern/emu/cache.c index bdff146ef..543e457e5 100644 --- a/grub-core/kern/emu/cache.c +++ b/grub-core/kern/emu/cache.c @@ -1,4 +1,5 @@ +#if defined(__ia64__) #include void __clear_cache (char *beg, char *end); @@ -8,3 +9,5 @@ grub_arch_sync_caches (void *address, grub_size_t len) { __clear_cache (address, (char *) address + len); } +#endif + diff --git a/grub-core/kern/emu/full.c b/grub-core/kern/emu/full.c index 0bd33337f..0396d0ab4 100644 --- a/grub-core/kern/emu/full.c +++ b/grub-core/kern/emu/full.c @@ -48,3 +48,12 @@ grub_emu_init (void) { grub_no_autoload = 1; } + +#ifdef __ia64__ +grub_size_t +grub_arch_dl_get_tramp_size (const void *ehdr __attribute__ ((unused)), + unsigned sec __attribute__ ((unused))) +{ + return ~(grub_size_t)0; +} +#endif diff --git a/grub-core/kern/emu/lite.c b/grub-core/kern/emu/lite.c index 9b3728717..5d3588bd0 100644 --- a/grub-core/kern/emu/lite.c +++ b/grub-core/kern/emu/lite.c @@ -15,6 +15,8 @@ #include "../mips/dl.c" #elif defined(__powerpc__) #include "../powerpc/dl.c" +#elif defined(__ia64__) +#include "../ia64/dl.c" #else #error "No target cpu type is defined" #endif diff --git a/grub-core/kern/ia64/dl.c b/grub-core/kern/ia64/dl.c new file mode 100644 index 000000000..2b87577a4 --- /dev/null +++ b/grub-core/kern/ia64/dl.c @@ -0,0 +1,288 @@ +/* dl.c - arch-dependent part of loadable module support */ +/* + * GRUB -- GRand Unified Bootloader + * Copyright (C) 2002,2004,2005,2007,2009 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 . + */ + +#include +#include +#include +#include +#include + +/* Check if EHDR is a valid ELF header. */ +grub_err_t +grub_arch_dl_check_header (void *ehdr) +{ + Elf_Ehdr *e = ehdr; + + /* Check the magic numbers. */ + if (e->e_ident[EI_CLASS] != ELFCLASS64 + || e->e_ident[EI_DATA] != ELFDATA2LSB + || e->e_machine != EM_IA_64) + return grub_error (GRUB_ERR_BAD_OS, "invalid arch specific ELF magic"); + + return GRUB_ERR_NONE; +} + +#define MASK20 ((1 << 20) - 1) +#define MASK19 ((1 << 19) - 1) + +static void +add_value_to_slot13_20 (Elf_Word *addr, grub_uint32_t value, int slot) +{ + grub_uint32_t *p __attribute__ ((aligned (1))); + switch (slot) + { + case 0: + p = (grub_uint32_t *) (addr + 2); + *p = (((((*p >> 2) & MASK20) + value) & MASK20) << 2) | (*p & ~(MASK20 << 2)); + break; + case 1: + p = (grub_uint32_t *) ((grub_uint8_t *) addr + 7); + *p = (((((*p >> 3) & MASK20) + value) & MASK20) << 3) | (*p & ~(MASK20 << 3)); + break; + case 2: + p = (grub_uint32_t *) ((grub_uint8_t *) addr + 12); + *p = (((((*p >> 4) & MASK20) + value) & MASK20) << 4) | (*p & ~(MASK20 << 4)); + break; + } +} + +static grub_uint8_t nopm[5] = + { + /* [MLX] nop.m 0x0 */ + 0x05, 0x00, 0x00, 0x00, 0x01 + }; + +static grub_uint8_t jump[0x20] = + { + /* ld8 r16=[r15],8 */ + 0x02, 0x80, 0x20, 0x1e, 0x18, 0x14, + /* mov r14=r1;; */ + 0xe0, 0x00, 0x04, 0x00, 0x42, 0x00, + /* nop.i 0x0 */ + 0x00, 0x00, 0x04, 0x00, + /* ld8 r1=[r15] */ + 0x11, 0x08, 0x00, 0x1e, 0x18, 0x10, + /* mov b6=r16 */ + 0x60, 0x80, 0x04, 0x80, 0x03, 0x00, + /* br.few b6;; */ + 0x60, 0x00, 0x80, 0x00 + }; + +struct ia64_trampoline +{ + /* nop.m */ + grub_uint8_t nop[5]; + /* movl r15 = addr*/ + grub_uint8_t addr_hi[6]; + grub_uint8_t e0; + grub_uint8_t addr_lo[4]; + grub_uint8_t jump[0x20]; +}; + +static void +make_trampoline (struct ia64_trampoline *tr, grub_uint64_t addr) +{ + grub_memcpy (tr->nop, nopm, sizeof (tr->nop)); + tr->addr_hi[0] = ((addr & 0xc00000) >> 18); + tr->addr_hi[1] = (addr >> 24) & 0xff; + tr->addr_hi[2] = (addr >> 32) & 0xff; + tr->addr_hi[3] = (addr >> 40) & 0xff; + tr->addr_hi[4] = (addr >> 48) & 0xff; + tr->addr_hi[5] = (addr >> 56) & 0xff; + tr->e0 = 0xe0; + tr->addr_lo[0] = ((addr & 0x000f) << 4) | 0x01; + tr->addr_lo[1] = ((addr & 0x0070) >> 4) | ((addr & 0x070000) >> 11) | ((addr & 0x200000) >> 17); + tr->addr_lo[2] = ((addr & 0x1f80) >> 5) | ((addr & 0x180000) >> 19); + tr->addr_lo[3] = ((addr & 0xe000) >> 13) | 0x60; + grub_memcpy (tr->jump, jump, sizeof (tr->jump)); +} + +grub_size_t +grub_arch_dl_get_tramp_size (const void *ehdr, unsigned sec) +{ + const Elf_Ehdr *e = ehdr; + int cnt = 0; + const Elf_Shdr *s; + Elf_Word entsize; + unsigned i; + + /* Find a symbol table. */ + for (i = 0, s = (Elf_Shdr *) ((char *) e + e->e_shoff); + i < e->e_shnum; + i++, s = (Elf_Shdr *) ((char *) s + e->e_shentsize)) + if (s->sh_type == SHT_SYMTAB) + break; + + if (i == e->e_shnum) + return 0; + + entsize = s->sh_entsize; + + for (i = 0, s = (Elf_Shdr *) ((char *) e + e->e_shoff); + i < e->e_shnum; + i++, s = (Elf_Shdr *) ((char *) s + e->e_shentsize)) + if (s->sh_type == SHT_RELA) + { + Elf_Rela *rel, *max; + + if (s->sh_info != sec) + continue; + + for (rel = (Elf_Rela *) ((char *) e + s->sh_offset), + max = rel + s->sh_size / s->sh_entsize; + rel < max; rel++) + if (ELF_R_TYPE (rel->r_info) == R_IA64_PCREL21B) + cnt++; + } + + return cnt * sizeof (struct ia64_trampoline); +} + +/* Relocate symbols. */ +grub_err_t +grub_arch_dl_relocate_symbols (grub_dl_t mod, void *ehdr) +{ + Elf_Ehdr *e = ehdr; + Elf_Shdr *s; + Elf_Word entsize; + unsigned i; + grub_uint64_t *gp, *gpptr; + grub_size_t gp_size = 0; + + for (i = 0, s = (Elf_Shdr *) ((char *) e + e->e_shoff); + i < e->e_shnum; + i++, s = (Elf_Shdr *) ((char *) s + e->e_shentsize)) + if (s->sh_type == SHT_REL) + { + grub_dl_segment_t seg; + + /* Find the target segment. */ + for (seg = mod->segment; seg; seg = seg->next) + if (seg->section == s->sh_info) + break; + + if (seg) + { + Elf_Rel *rel, *max; + + for (rel = (Elf_Rel *) ((char *) e + s->sh_offset), + max = rel + s->sh_size / s->sh_entsize; + rel < max; + rel++) + switch (ELF_R_TYPE (rel->r_info)) + { + default: break; + } + } + } + + if (gp_size > MASK19) + return grub_error (GRUB_ERR_OUT_OF_RANGE, "gp too big"); + + gpptr = gp = grub_malloc (gp_size); + if (!gp) + return grub_errno; + mod->gp = (char *) gp; + + /* Find a symbol table. */ + for (i = 0, s = (Elf_Shdr *) ((char *) e + e->e_shoff); + i < e->e_shnum; + i++, s = (Elf_Shdr *) ((char *) s + e->e_shentsize)) + if (s->sh_type == SHT_SYMTAB) + break; + + if (i == e->e_shnum) + return grub_error (GRUB_ERR_BAD_MODULE, "no symtab found"); + + entsize = s->sh_entsize; + + for (i = 0, s = (Elf_Shdr *) ((char *) e + e->e_shoff); + i < e->e_shnum; + i++, s = (Elf_Shdr *) ((char *) s + e->e_shentsize)) + if (s->sh_type == SHT_RELA) + { + grub_dl_segment_t seg; + + /* Find the target segment. */ + for (seg = mod->segment; seg; seg = seg->next) + if (seg->section == s->sh_info) + break; + + if (seg) + { + Elf_Rela *rel, *max; + struct ia64_trampoline *tr; + + for (rel = (Elf_Rela *) ((char *) e + s->sh_offset), + max = rel + s->sh_size / s->sh_entsize; + rel < max; + rel++) + { + Elf_Word *addr; + Elf_Sym *sym; + grub_uint64_t value; + int slot = 0; + + if (seg->size < (rel->r_offset & ~3)) + return grub_error (GRUB_ERR_BAD_MODULE, + "reloc offset is out of the segment"); + + tr = (void *) ((char *) seg->addr + ALIGN_UP (seg->size, GRUB_ARCH_DL_TRAMP_ALIGN)); + + if (ELF_R_TYPE (rel->r_info) == R_IA64_PCREL21B) + { + addr = (Elf_Word *) ((char *) seg->addr + (rel->r_offset & ~3)); + slot = rel->r_offset & 3; + } + else + addr = (Elf_Word *) ((char *) seg->addr + rel->r_offset); + sym = (Elf_Sym *) ((char *) mod->symtab + + entsize * ELF_R_SYM (rel->r_info)); + + /* On the PPC the value does not have an explicit + addend, add it. */ + value = sym->st_value + rel->r_addend; + switch (ELF_R_TYPE (rel->r_info)) + { + case R_IA64_PCREL21B: + { + grub_uint64_t noff; + make_trampoline (tr, value); + noff = ((char *) tr - (char *) addr) >> 4; + tr++; + if (noff & ~MASK19) + return grub_error (GRUB_ERR_BAD_OS, + "trampoline offset too big"); + add_value_to_slot13_20 (addr, noff, slot); + } + break; + case R_IA64_SEGREL64LSB: + *(grub_uint64_t *) addr += value - rel->r_offset; + break; + default: + return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET, + "this relocation (0x%x) is not implemented yet", + ELF_R_TYPE (rel->r_info)); + } + } + } + } + + return GRUB_ERR_NONE; +} diff --git a/include/grub/dl.h b/include/grub/dl.h index afc4af41a..e04285280 100644 --- a/include/grub/dl.h +++ b/include/grub/dl.h @@ -90,8 +90,11 @@ struct grub_dl grub_dl_dep_t dep; grub_dl_segment_t segment; Elf_Sym *symtab; - void (*init) (struct grub_dl *mod); - void (*fini) (void); + grub_addr_t init; + grub_addr_t fini; +#ifdef __ia64__ + char *gp; +#endif struct grub_dl *next; }; typedef struct grub_dl *grub_dl_t; @@ -119,4 +122,17 @@ grub_err_t grub_arch_dl_relocate_symbols (grub_dl_t mod, void *ehdr); void grub_arch_dl_init_linker (void); #endif +#ifdef __ia64__ +grub_size_t grub_arch_dl_get_tramp_size (const void *ehdr, unsigned sec); +#define GRUB_ARCH_DL_TRAMP_ALIGN 16 +#else +static inline grub_size_t +grub_arch_dl_get_tramp_size (const void *ehdr __attribute__ ((unused)), int sec __attribute__ ((unused))) +{ + return 0; +} +#define GRUB_ARCH_DL_TRAMP_ALIGN 1 +#endif + + #endif /* ! GRUB_DL_H */ diff --git a/include/grub/types.h b/include/grub/types.h index 4499e4538..b3aa69c1c 100644 --- a/include/grub/types.h +++ b/include/grub/types.h @@ -95,8 +95,10 @@ typedef grub_int64_t grub_ssize_t; # if GRUB_CPU_SIZEOF_LONG == 8 # define PRIxGRUB_SIZE "lx" +# define PRIxGRUB_ADDR "lx" # else # define PRIxGRUB_SIZE "llx" +# define PRIxGRUB_ADDR "llx" # endif #else typedef grub_uint32_t grub_addr_t; @@ -104,6 +106,7 @@ typedef grub_uint32_t grub_size_t; typedef grub_int32_t grub_ssize_t; # define PRIxGRUB_SIZE "x" +# define PRIxGRUB_ADDR "x" #endif #if GRUB_CPU_SIZEOF_LONG == 8