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-rw-r--r--arch/loongarch/include/asm/module.h103
1 files changed, 103 insertions, 0 deletions
diff --git a/arch/loongarch/include/asm/module.h b/arch/loongarch/include/asm/module.h
new file mode 100644
index 000000000..b29b19a46
--- /dev/null
+++ b/arch/loongarch/include/asm/module.h
@@ -0,0 +1,103 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2020-2022 Loongson Technology Corporation Limited
+ */
+#ifndef _ASM_MODULE_H
+#define _ASM_MODULE_H
+
+#include <asm/inst.h>
+#include <asm-generic/module.h>
+
+#define RELA_STACK_DEPTH 16
+
+struct mod_section {
+ Elf_Shdr *shdr;
+ int num_entries;
+ int max_entries;
+};
+
+struct mod_arch_specific {
+ struct mod_section got;
+ struct mod_section plt;
+ struct mod_section plt_idx;
+};
+
+struct got_entry {
+ Elf_Addr symbol_addr;
+};
+
+struct plt_entry {
+ u32 inst_lu12iw;
+ u32 inst_lu32id;
+ u32 inst_lu52id;
+ u32 inst_jirl;
+};
+
+struct plt_idx_entry {
+ Elf_Addr symbol_addr;
+};
+
+Elf_Addr module_emit_got_entry(struct module *mod, Elf_Addr val);
+Elf_Addr module_emit_plt_entry(struct module *mod, Elf_Addr val);
+
+static inline struct got_entry emit_got_entry(Elf_Addr val)
+{
+ return (struct got_entry) { val };
+}
+
+static inline struct plt_entry emit_plt_entry(unsigned long val)
+{
+ u32 lu12iw, lu32id, lu52id, jirl;
+
+ lu12iw = (lu12iw_op << 25 | (((val >> 12) & 0xfffff) << 5) | LOONGARCH_GPR_T1);
+ lu32id = larch_insn_gen_lu32id(LOONGARCH_GPR_T1, ADDR_IMM(val, LU32ID));
+ lu52id = larch_insn_gen_lu52id(LOONGARCH_GPR_T1, LOONGARCH_GPR_T1, ADDR_IMM(val, LU52ID));
+ jirl = larch_insn_gen_jirl(0, LOONGARCH_GPR_T1, 0, (val & 0xfff));
+
+ return (struct plt_entry) { lu12iw, lu32id, lu52id, jirl };
+}
+
+static inline struct plt_idx_entry emit_plt_idx_entry(unsigned long val)
+{
+ return (struct plt_idx_entry) { val };
+}
+
+static inline int get_plt_idx(unsigned long val, const struct mod_section *sec)
+{
+ int i;
+ struct plt_idx_entry *plt_idx = (struct plt_idx_entry *)sec->shdr->sh_addr;
+
+ for (i = 0; i < sec->num_entries; i++) {
+ if (plt_idx[i].symbol_addr == val)
+ return i;
+ }
+
+ return -1;
+}
+
+static inline struct plt_entry *get_plt_entry(unsigned long val,
+ const struct mod_section *sec_plt,
+ const struct mod_section *sec_plt_idx)
+{
+ int plt_idx = get_plt_idx(val, sec_plt_idx);
+ struct plt_entry *plt = (struct plt_entry *)sec_plt->shdr->sh_addr;
+
+ if (plt_idx < 0)
+ return NULL;
+
+ return plt + plt_idx;
+}
+
+static inline struct got_entry *get_got_entry(Elf_Addr val,
+ const struct mod_section *sec)
+{
+ struct got_entry *got = (struct got_entry *)sec->shdr->sh_addr;
+ int i;
+
+ for (i = 0; i < sec->num_entries; i++)
+ if (got[i].symbol_addr == val)
+ return &got[i];
+ return NULL;
+}
+
+#endif /* _ASM_MODULE_H */