| 1 |
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| 2 | #ifndef _ASM_POWERPC_MODULE_H
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| 3 | #define _ASM_POWERPC_MODULE_H
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| 4 | #ifdef __KERNEL__
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| 5 |
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| 6 | #include <linux/list.h>
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| 7 | #include <asm/bug.h>
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| 8 | #include <asm-generic/module.h>
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| 9 |
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| 10 | #ifndef __powerpc64__
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| 11 | |
| 12 | * Thanks to Paul M for explaining this.
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| 13 | *
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| 14 | * PPC can only do rel jumps += 32MB, and often the kernel and other
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| 15 | * modules are further away than this. So, we jump to a table of
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| 16 | * trampolines attached to the module (the Procedure Linkage Table)
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| 17 | * whenever that happens.
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| 18 |
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| 19 |
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| 20 | struct ppc_plt_entry {
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| 21 |
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| 22 | unsigned int jump[4];
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| 23 | };
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| 24 | #endif
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| 25 |
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| 26 |
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| 27 | struct mod_arch_specific {
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| 28 | #ifdef __powerpc64__
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| 29 | unsigned int stubs_section;
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| 30 | unsigned int stub_count;
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| 31 | #ifdef CONFIG_PPC_KERNEL_PCREL
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| 32 | unsigned int got_section;
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| 33 | unsigned int pcpu_section;
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| 34 | #else
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| 35 | unsigned int toc_section;
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| 36 | bool toc_fixed;
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| 37 | #endif
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| 38 |
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| 39 | #ifdef CONFIG_PPC64_ELF_ABI_V1
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| 40 |
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| 41 | unsigned long start_opd;
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| 42 | unsigned long end_opd;
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| 43 | #endif
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| 44 | #else
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| 45 |
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| 46 | unsigned int core_plt_section;
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| 47 | unsigned int init_plt_section;
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| 48 | #endif
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| 49 |
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| 50 | #ifdef CONFIG_DYNAMIC_FTRACE
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| 51 | unsigned long tramp;
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| 52 | unsigned long tramp_regs;
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| 53 | #ifdef CONFIG_PPC_FTRACE_OUT_OF_LINE
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| 54 | struct ftrace_ool_stub *ool_stubs;
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| 55 | unsigned int ool_stub_count;
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| 56 | unsigned int ool_stub_index;
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| 57 | #endif
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| 58 | #endif
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| 59 | };
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| 60 |
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| 61 | |
| 62 | * Select ELF headers.
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| 63 | * Make empty sections for module_frob_arch_sections to expand.
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| 64 |
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| 65 |
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| 66 | #ifdef __powerpc64__
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| 67 | # ifdef MODULE
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| 68 | asm(".section .stubs,\"ax\",@nobits; .align 3; .previous");
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| 69 | # ifdef CONFIG_PPC_KERNEL_PCREL
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| 70 | asm(".section .mygot,\"a\",@nobits; .align 3; .previous");
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| 71 | # endif
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| 72 | # endif
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| 73 | #else
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| 74 | # ifdef MODULE
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| 75 | asm(".section .plt,\"ax\",@nobits; .align 3; .previous");
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| 76 | asm(".section .init.plt,\"ax\",@nobits; .align 3; .previous");
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| 77 | # endif
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| 78 | #endif
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| 79 |
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| 80 | #ifdef CONFIG_DYNAMIC_FTRACE
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| 81 | int module_trampoline_target(struct module *mod, unsigned long trampoline,
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| 82 | unsigned long *target);
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| 83 | int module_finalize_ftrace(struct module *mod, const Elf_Shdr *sechdrs);
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| 84 | #else
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| 85 | static inline int module_finalize_ftrace(struct module *mod, const Elf_Shdr *sechdrs)
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| 86 | {
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| 87 | return 0;
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| 88 | }
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| 89 | #endif
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| 90 |
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| 91 | #endif
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| 92 | #endif
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