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author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 00:20:36 +0200 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-17 00:20:36 +0200 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /arch/m32r/kernel/module.c | |
download | linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.tar.xz linux-1da177e4c3f41524e886b7f1b8a0c1fc7321cac2.zip |
Linux-2.6.12-rc2v2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'arch/m32r/kernel/module.c')
-rw-r--r-- | arch/m32r/kernel/module.c | 259 |
1 files changed, 259 insertions, 0 deletions
diff --git a/arch/m32r/kernel/module.c b/arch/m32r/kernel/module.c new file mode 100644 index 000000000000..f6a79a016ce0 --- /dev/null +++ b/arch/m32r/kernel/module.c @@ -0,0 +1,259 @@ +/* Kernel module help for M32R. + + This program 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 2 of the License, or + (at your option) any later version. + + This program 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 this program; if not, write to the Free Software + Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA +*/ + +#include <linux/config.h> +#include <linux/moduleloader.h> +#include <linux/elf.h> +#include <linux/vmalloc.h> +#include <linux/fs.h> +#include <linux/string.h> +#include <linux/kernel.h> + +#if 0 +#define DEBUGP printk +#else +#define DEBUGP(fmt...) +#endif + +void *module_alloc(unsigned long size) +{ + if (size == 0) + return NULL; +#ifdef CONFIG_MMU + return vmalloc_exec(size); +#else + return vmalloc(size); +#endif +} + + +/* Free memory returned from module_alloc */ +void module_free(struct module *mod, void *module_region) +{ + vfree(module_region); + /* FIXME: If module_region == mod->init_region, trim exception + table entries. */ +} + +/* We don't need anything special. */ +int module_frob_arch_sections(Elf_Ehdr *hdr, + Elf_Shdr *sechdrs, + char *secstrings, + struct module *mod) +{ + return 0; +} + +#define COPY_UNALIGNED_WORD(sw, tw, align) \ +{ \ + void *__s = &(sw), *__t = &(tw); \ + unsigned short *__s2 = __s, *__t2 =__t; \ + unsigned char *__s1 = __s, *__t1 =__t; \ + switch ((align)) \ + { \ + case 0: \ + *(unsigned long *) __t = *(unsigned long *) __s; \ + break; \ + case 2: \ + *__t2++ = *__s2++; \ + *__t2 = *__s2; \ + break; \ + default: \ + *__t1++ = *__s1++; \ + *__t1++ = *__s1++; \ + *__t1++ = *__s1++; \ + *__t1 = *__s1; \ + break; \ + } \ +} + +#define COPY_UNALIGNED_HWORD(sw, tw, align) \ + { \ + void *__s = &(sw), *__t = &(tw); \ + unsigned short *__s2 = __s, *__t2 =__t; \ + unsigned char *__s1 = __s, *__t1 =__t; \ + switch ((align)) \ + { \ + case 0: \ + *__t2 = *__s2; \ + break; \ + default: \ + *__t1++ = *__s1++; \ + *__t1 = *__s1; \ + break; \ + } \ + } + +int apply_relocate_add(Elf32_Shdr *sechdrs, + const char *strtab, + unsigned int symindex, + unsigned int relsec, + struct module *me) +{ + unsigned int i; + Elf32_Rela *rel = (void *)sechdrs[relsec].sh_addr; + Elf32_Sym *sym; + Elf32_Addr relocation; + uint32_t *location; + uint32_t value; + unsigned short *hlocation; + unsigned short hvalue; + int svalue; + int align; + + DEBUGP("Applying relocate section %u to %u\n", relsec, + sechdrs[relsec].sh_info); + for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) { + /* This is where to make the change */ + location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr + + rel[i].r_offset; + /* This is the symbol it is referring to. Note that all + undefined symbols have been resolved. */ + sym = (Elf32_Sym *)sechdrs[symindex].sh_addr + + ELF32_R_SYM(rel[i].r_info); + relocation = sym->st_value + rel[i].r_addend; + align = (int)location & 3; + + switch (ELF32_R_TYPE(rel[i].r_info)) { + case R_M32R_32_RELA: + COPY_UNALIGNED_WORD (*location, value, align); + value += relocation; + COPY_UNALIGNED_WORD (value, *location, align); + break; + case R_M32R_HI16_ULO_RELA: + COPY_UNALIGNED_WORD (*location, value, align); + relocation = (relocation >>16) & 0xffff; + /* RELA must has 0 at relocation field. */ + value += relocation; + COPY_UNALIGNED_WORD (value, *location, align); + break; + case R_M32R_HI16_SLO_RELA: + COPY_UNALIGNED_WORD (*location, value, align); + if (relocation & 0x8000) relocation += 0x10000; + relocation = (relocation >>16) & 0xffff; + /* RELA must has 0 at relocation field. */ + value += relocation; + COPY_UNALIGNED_WORD (value, *location, align); + break; + case R_M32R_16_RELA: + hlocation = (unsigned short *)location; + relocation = relocation & 0xffff; + /* RELA must has 0 at relocation field. */ + hvalue = relocation; + COPY_UNALIGNED_WORD (hvalue, *hlocation, align); + break; + case R_M32R_SDA16_RELA: + case R_M32R_LO16_RELA: + COPY_UNALIGNED_WORD (*location, value, align); + relocation = relocation & 0xffff; + /* RELA must has 0 at relocation field. */ + value += relocation; + COPY_UNALIGNED_WORD (value, *location, align); + break; + case R_M32R_24_RELA: + COPY_UNALIGNED_WORD (*location, value, align); + relocation = relocation & 0xffffff; + /* RELA must has 0 at relocation field. */ + value += relocation; + COPY_UNALIGNED_WORD (value, *location, align); + break; + case R_M32R_18_PCREL_RELA: + relocation = (relocation - (Elf32_Addr) location); + if (relocation < -0x20000 || 0x1fffc < relocation) + { + printk(KERN_ERR "module %s: relocation overflow: %u\n", + me->name, relocation); + return -ENOEXEC; + } + COPY_UNALIGNED_WORD (*location, value, align); + if (value & 0xffff) + { + /* RELA must has 0 at relocation field. */ + printk(KERN_ERR "module %s: illegal relocation field: %u\n", + me->name, value); + return -ENOEXEC; + } + relocation = (relocation >> 2) & 0xffff; + value += relocation; + COPY_UNALIGNED_WORD (value, *location, align); + break; + case R_M32R_10_PCREL_RELA: + hlocation = (unsigned short *)location; + relocation = (relocation - (Elf32_Addr) location); + COPY_UNALIGNED_HWORD (*hlocation, hvalue, align); + svalue = (int)hvalue; + svalue = (signed char)svalue << 2; + relocation += svalue; + relocation = (relocation >> 2) & 0xff; + hvalue = hvalue & 0xff00; + hvalue += relocation; + COPY_UNALIGNED_HWORD (hvalue, *hlocation, align); + break; + case R_M32R_26_PCREL_RELA: + relocation = (relocation - (Elf32_Addr) location); + if (relocation < -0x2000000 || 0x1fffffc < relocation) + { + printk(KERN_ERR "module %s: relocation overflow: %u\n", + me->name, relocation); + return -ENOEXEC; + } + COPY_UNALIGNED_WORD (*location, value, align); + if (value & 0xffffff) + { + /* RELA must has 0 at relocation field. */ + printk(KERN_ERR "module %s: illegal relocation field: %u\n", + me->name, value); + return -ENOEXEC; + } + relocation = (relocation >> 2) & 0xffffff; + value += relocation; + COPY_UNALIGNED_WORD (value, *location, align); + break; + default: + printk(KERN_ERR "module %s: Unknown relocation: %u\n", + me->name, ELF32_R_TYPE(rel[i].r_info)); + return -ENOEXEC; + } + } + return 0; +} + +int apply_relocate(Elf32_Shdr *sechdrs, + const char *strtab, + unsigned int symindex, + unsigned int relsec, + struct module *me) +{ +#if 0 + printk(KERN_ERR "module %s: REL RELOCATION unsupported\n", + me->name); + return -ENOEXEC; +#endif + return 0; + +} + +int module_finalize(const Elf_Ehdr *hdr, + const Elf_Shdr *sechdrs, + struct module *me) +{ + return 0; +} + +void module_arch_cleanup(struct module *mod) +{ +} |