include/asm-ppc/module.h

   1 #ifndef _ASM_PPC_MODULE_H
   2 #define _ASM_PPC_MODULE_H
   3 /* Module stuff for PPC.  (C) 2001 Rusty Russell */
   4
   5 #include <linux/list.h>
   6 #include <asm/bug.h>
   7
   8 /* Thanks to Paul M for explaining this.
   9
  10    PPC can only do rel jumps += 32MB, and often the kernel and other
  11    modules are furthur away than this.  So, we jump to a table of
  12    trampolines attached to the module (the Procedure Linkage Table)
  13    whenever that happens.
  14 */
  15
  16 struct ppc_plt_entry
  17 {
  18         /* 16 byte jump instruction sequence (4 instructions) */
  19         unsigned int jump[4];
  20 };
  21
  22 struct mod_arch_specific
  23 {
  24         /* Indices of PLT sections within module. */
  25         unsigned int core_plt_section, init_plt_section;
  26
  27         /* List of BUG addresses, source line numbers and filenames */
  28         struct list_head bug_list;
  29         struct bug_entry *bug_table;
  30         unsigned int num_bugs;
  31 };
  32
  33 extern struct bug_entry *module_find_bug(unsigned long bugaddr);
  34
  35 #define Elf_Shdr Elf32_Shdr
  36 #define Elf_Sym Elf32_Sym
  37 #define Elf_Ehdr Elf32_Ehdr
  38
  39 /* Make empty sections for module_frob_arch_sections to expand. */
  40 #ifdef MODULE
  41 asm(".section .plt,\"ax\",@nobits; .align 3; .previous");
  42 asm(".section .init.plt,\"ax\",@nobits; .align 3; .previous");
  43 #endif
  44 #endif /* _ASM_PPC_MODULE_H */