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-rw-r--r--arch/powerpc/include/asm/module.h85
1 files changed, 85 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..09e2ffd36
--- /dev/null
+++ b/arch/powerpc/include/asm/module.h
@@ -0,0 +1,85 @@
+/* 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 */
+ unsigned int toc_section; /* What section is the TOC? */
+ bool toc_fixed; /* Have we fixed up .TOC.? */
+
+ /* 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 section for module_frob_arch_sections to expand.
+ */
+
+#ifdef __powerpc64__
+# ifdef MODULE
+ asm(".section .stubs,\"ax\",@nobits; .align 3; .previous");
+# 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
+# ifdef MODULE
+ asm(".section .ftrace.tramp,\"ax\",@nobits; .align 3; .previous");
+# endif /* MODULE */
+
+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 */