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80 lines
1.8 KiB
80 lines
1.8 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
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/* |
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* Copyright (C) 2020-2022 Loongson Technology Corporation Limited |
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*/ |
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#ifndef _ASM_MODULE_H |
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#define _ASM_MODULE_H |
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#include <asm/inst.h> |
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#include <asm-generic/module.h> |
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#define RELA_STACK_DEPTH 16 |
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struct mod_section { |
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Elf_Shdr *shdr; |
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int num_entries; |
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int max_entries; |
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}; |
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struct mod_arch_specific { |
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struct mod_section plt; |
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struct mod_section plt_idx; |
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}; |
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struct plt_entry { |
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u32 inst_lu12iw; |
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u32 inst_lu32id; |
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u32 inst_lu52id; |
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u32 inst_jirl; |
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}; |
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struct plt_idx_entry { |
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unsigned long symbol_addr; |
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}; |
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Elf_Addr module_emit_plt_entry(struct module *mod, unsigned long val); |
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static inline struct plt_entry emit_plt_entry(unsigned long val) |
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{ |
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u32 lu12iw, lu32id, lu52id, jirl; |
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lu12iw = (lu12iw_op << 25 | (((val >> 12) & 0xfffff) << 5) | LOONGARCH_GPR_T1); |
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lu32id = larch_insn_gen_lu32id(LOONGARCH_GPR_T1, ADDR_IMM(val, LU32ID)); |
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lu52id = larch_insn_gen_lu52id(LOONGARCH_GPR_T1, LOONGARCH_GPR_T1, ADDR_IMM(val, LU52ID)); |
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jirl = larch_insn_gen_jirl(0, LOONGARCH_GPR_T1, 0, (val & 0xfff)); |
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return (struct plt_entry) { lu12iw, lu32id, lu52id, jirl }; |
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} |
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static inline struct plt_idx_entry emit_plt_idx_entry(unsigned long val) |
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{ |
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return (struct plt_idx_entry) { val }; |
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} |
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static inline int get_plt_idx(unsigned long val, const struct mod_section *sec) |
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{ |
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int i; |
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struct plt_idx_entry *plt_idx = (struct plt_idx_entry *)sec->shdr->sh_addr; |
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for (i = 0; i < sec->num_entries; i++) { |
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if (plt_idx[i].symbol_addr == val) |
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return i; |
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} |
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return -1; |
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} |
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static inline struct plt_entry *get_plt_entry(unsigned long val, |
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const struct mod_section *sec_plt, |
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const struct mod_section *sec_plt_idx) |
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{ |
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int plt_idx = get_plt_idx(val, sec_plt_idx); |
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struct plt_entry *plt = (struct plt_entry *)sec_plt->shdr->sh_addr; |
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if (plt_idx < 0) |
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return NULL; |
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return plt + plt_idx; |
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} |
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#endif /* _ASM_MODULE_H */
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