1 files changed, 89 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/module.h b/arch/powerpc/include/asm/module.h
new file mode 100644
index 000000000..a8e2e8339
--- /dev/null
+++ b/arch/powerpc/include/asm/module.h
@@ -0,0 +1,89 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+#ifndef _ASM_POWERPC_MODULE_H
+#define _ASM_POWERPC_MODULE_H
+#ifdef __KERNEL__
+
+#include <linux/list.h>
+#include <asm/bug.h>
+#include <asm-generic/module.h>
+
+#ifndef __powerpc64__
+/*
+ * Thanks to Paul M for explaining this.
+ *
+ * PPC can only do rel jumps += 32MB, and often the kernel and other
+ * modules are further away than this.  So, we jump to a table of
+ * trampolines attached to the module (the Procedure Linkage Table)
+ * whenever that happens.
+ */
+
+struct ppc_plt_entry {
+	/* 16 byte jump instruction sequence (4 instructions) */
+	unsigned int jump[4];
+};
+#endif	/* __powerpc64__ */
+
+
+struct mod_arch_specific {
+#ifdef __powerpc64__
+	unsigned int stubs_section;	/* Index of stubs section in module */
+#ifdef CONFIG_PPC_KERNEL_PCREL
+	unsigned int got_section;	/* What section is the GOT? */
+	unsigned int pcpu_section;	/* .data..percpu section */
+#else
+	unsigned int toc_section;	/* What section is the TOC? */
+	bool toc_fixed;			/* Have we fixed up .TOC.? */
+#endif
+
+	/* For module function descriptor dereference */
+	unsigned long start_opd;
+	unsigned long end_opd;
+#else /* powerpc64 */
+	/* Indices of PLT sections within module. */
+	unsigned int core_plt_section;
+	unsigned int init_plt_section;
+#endif /* powerpc64 */
+
+#ifdef CONFIG_DYNAMIC_FTRACE
+	unsigned long tramp;
+	unsigned long tramp_regs;
+#endif
+
+	/* List of BUG addresses, source line numbers and filenames */
+	struct list_head bug_list;
+	struct bug_entry *bug_table;
+	unsigned int num_bugs;
+};
+
+/*
+ * Select ELF headers.
+ * Make empty sections for module_frob_arch_sections to expand.
+ */
+
+#ifdef __powerpc64__
+#    ifdef MODULE
+	asm(".section .stubs,\"ax\",@nobits; .align 3; .previous");
+#        ifdef CONFIG_PPC_KERNEL_PCREL
+	    asm(".section .mygot,\"a\",@nobits; .align 3; .previous");
+#        endif
+#    endif
+#else
+#    ifdef MODULE
+	asm(".section .plt,\"ax\",@nobits; .align 3; .previous");
+	asm(".section .init.plt,\"ax\",@nobits; .align 3; .previous");
+#    endif	/* MODULE */
+#endif
+
+#ifdef CONFIG_DYNAMIC_FTRACE
+int module_trampoline_target(struct module *mod, unsigned long trampoline,
+			     unsigned long *target);
+int module_finalize_ftrace(struct module *mod, const Elf_Shdr *sechdrs);
+#else
+static inline int module_finalize_ftrace(struct module *mod, const Elf_Shdr *sechdrs)
+{
+	return 0;
+}
+#endif
+
+#endif /* __KERNEL__ */
+#endif	/* _ASM_POWERPC_MODULE_H */