109 lines
2.5 KiB
C
109 lines
2.5 KiB
C
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/* 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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int shndx;
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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 got;
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struct mod_section plt;
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struct mod_section plt_idx;
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/* For CONFIG_DYNAMIC_FTRACE */
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struct plt_entry *ftrace_trampolines;
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};
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struct got_entry {
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Elf_Addr symbol_addr;
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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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Elf_Addr symbol_addr;
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};
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Elf_Addr module_emit_got_entry(struct module *mod, Elf_Shdr *sechdrs, Elf_Addr val);
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Elf_Addr module_emit_plt_entry(struct module *mod, Elf_Shdr *sechdrs, Elf_Addr val);
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static inline struct got_entry emit_got_entry(Elf_Addr val)
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{
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return (struct got_entry) { val };
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}
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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 = larch_insn_gen_lu12iw(LOONGARCH_GPR_T1, ADDR_IMM(val, LU12IW));
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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, Elf_Shdr *sechdrs, 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 *)sechdrs[sec->shndx].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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Elf_Shdr *sechdrs,
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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, sechdrs, sec_plt_idx);
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struct plt_entry *plt = (struct plt_entry *)sechdrs[sec_plt->shndx].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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static inline struct got_entry *get_got_entry(Elf_Addr val,
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Elf_Shdr *sechdrs,
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const struct mod_section *sec)
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{
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int i;
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struct got_entry *got = (struct got_entry *)sechdrs[sec->shndx].sh_addr;
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for (i = 0; i < sec->num_entries; i++)
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if (got[i].symbol_addr == val)
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return &got[i];
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return NULL;
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}
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#endif /* _ASM_MODULE_H */
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