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authorAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
committerAndré Fabian Silva Delgado <emulatorman@parabola.nu>2015-08-05 17:04:01 -0300
commit57f0f512b273f60d52568b8c6b77e17f5636edc0 (patch)
tree5e910f0e82173f4ef4f51111366a3f1299037a7b /arch/sparc/kernel/module.c
Initial import
Diffstat (limited to 'arch/sparc/kernel/module.c')
-rw-r--r--arch/sparc/kernel/module.c227
1 files changed, 227 insertions, 0 deletions
diff --git a/arch/sparc/kernel/module.c b/arch/sparc/kernel/module.c
new file mode 100644
index 000000000..192a617a3
--- /dev/null
+++ b/arch/sparc/kernel/module.c
@@ -0,0 +1,227 @@
+/* Kernel module help for sparc64.
+ *
+ * Copyright (C) 2001 Rusty Russell.
+ * Copyright (C) 2002 David S. Miller.
+ */
+
+#include <linux/moduleloader.h>
+#include <linux/kernel.h>
+#include <linux/elf.h>
+#include <linux/vmalloc.h>
+#include <linux/fs.h>
+#include <linux/gfp.h>
+#include <linux/string.h>
+#include <linux/ctype.h>
+#include <linux/mm.h>
+
+#include <asm/processor.h>
+#include <asm/spitfire.h>
+#include <asm/cacheflush.h>
+
+#include "entry.h"
+
+#ifdef CONFIG_SPARC64
+
+#include <linux/jump_label.h>
+
+static void *module_map(unsigned long size)
+{
+ if (PAGE_ALIGN(size) > MODULES_LEN)
+ return NULL;
+ return __vmalloc_node_range(size, 1, MODULES_VADDR, MODULES_END,
+ GFP_KERNEL, PAGE_KERNEL, 0, NUMA_NO_NODE,
+ __builtin_return_address(0));
+}
+#else
+static void *module_map(unsigned long size)
+{
+ return vmalloc(size);
+}
+#endif /* CONFIG_SPARC64 */
+
+void *module_alloc(unsigned long size)
+{
+ void *ret;
+
+ ret = module_map(size);
+ if (ret)
+ memset(ret, 0, size);
+
+ return ret;
+}
+
+/* Make generic code ignore STT_REGISTER dummy undefined symbols. */
+int module_frob_arch_sections(Elf_Ehdr *hdr,
+ Elf_Shdr *sechdrs,
+ char *secstrings,
+ struct module *mod)
+{
+ unsigned int symidx;
+ Elf_Sym *sym;
+ char *strtab;
+ int i;
+
+ for (symidx = 0; sechdrs[symidx].sh_type != SHT_SYMTAB; symidx++) {
+ if (symidx == hdr->e_shnum-1) {
+ printk("%s: no symtab found.\n", mod->name);
+ return -ENOEXEC;
+ }
+ }
+ sym = (Elf_Sym *)sechdrs[symidx].sh_addr;
+ strtab = (char *)sechdrs[sechdrs[symidx].sh_link].sh_addr;
+
+ for (i = 1; i < sechdrs[symidx].sh_size / sizeof(Elf_Sym); i++) {
+ if (sym[i].st_shndx == SHN_UNDEF) {
+ if (ELF_ST_TYPE(sym[i].st_info) == STT_REGISTER)
+ sym[i].st_shndx = SHN_ABS;
+ }
+ }
+ return 0;
+}
+
+int apply_relocate_add(Elf_Shdr *sechdrs,
+ const char *strtab,
+ unsigned int symindex,
+ unsigned int relsec,
+ struct module *me)
+{
+ unsigned int i;
+ Elf_Rela *rel = (void *)sechdrs[relsec].sh_addr;
+ Elf_Sym *sym;
+ u8 *location;
+ u32 *loc32;
+
+ for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
+ Elf_Addr v;
+
+ /* This is where to make the change */
+ location = (u8 *)sechdrs[sechdrs[relsec].sh_info].sh_addr
+ + rel[i].r_offset;
+ loc32 = (u32 *) location;
+
+#ifdef CONFIG_SPARC64
+ BUG_ON(((u64)location >> (u64)32) != (u64)0);
+#endif /* CONFIG_SPARC64 */
+
+ /* This is the symbol it is referring to. Note that all
+ undefined symbols have been resolved. */
+ sym = (Elf_Sym *)sechdrs[symindex].sh_addr
+ + ELF_R_SYM(rel[i].r_info);
+ v = sym->st_value + rel[i].r_addend;
+
+ switch (ELF_R_TYPE(rel[i].r_info) & 0xff) {
+ case R_SPARC_DISP32:
+ v -= (Elf_Addr) location;
+ *loc32 = v;
+ break;
+#ifdef CONFIG_SPARC64
+ case R_SPARC_64:
+ location[0] = v >> 56;
+ location[1] = v >> 48;
+ location[2] = v >> 40;
+ location[3] = v >> 32;
+ location[4] = v >> 24;
+ location[5] = v >> 16;
+ location[6] = v >> 8;
+ location[7] = v >> 0;
+ break;
+
+ case R_SPARC_WDISP19:
+ v -= (Elf_Addr) location;
+ *loc32 = (*loc32 & ~0x7ffff) |
+ ((v >> 2) & 0x7ffff);
+ break;
+
+ case R_SPARC_OLO10:
+ *loc32 = (*loc32 & ~0x1fff) |
+ (((v & 0x3ff) +
+ (ELF_R_TYPE(rel[i].r_info) >> 8))
+ & 0x1fff);
+ break;
+#endif /* CONFIG_SPARC64 */
+
+ case R_SPARC_32:
+ case R_SPARC_UA32:
+ location[0] = v >> 24;
+ location[1] = v >> 16;
+ location[2] = v >> 8;
+ location[3] = v >> 0;
+ break;
+
+ case R_SPARC_WDISP30:
+ v -= (Elf_Addr) location;
+ *loc32 = (*loc32 & ~0x3fffffff) |
+ ((v >> 2) & 0x3fffffff);
+ break;
+
+ case R_SPARC_WDISP22:
+ v -= (Elf_Addr) location;
+ *loc32 = (*loc32 & ~0x3fffff) |
+ ((v >> 2) & 0x3fffff);
+ break;
+
+ case R_SPARC_LO10:
+ *loc32 = (*loc32 & ~0x3ff) | (v & 0x3ff);
+ break;
+
+ case R_SPARC_HI22:
+ *loc32 = (*loc32 & ~0x3fffff) |
+ ((v >> 10) & 0x3fffff);
+ break;
+
+ default:
+ printk(KERN_ERR "module %s: Unknown relocation: %x\n",
+ me->name,
+ (int) (ELF_R_TYPE(rel[i].r_info) & 0xff));
+ return -ENOEXEC;
+ }
+ }
+ return 0;
+}
+
+#ifdef CONFIG_SPARC64
+static void do_patch_sections(const Elf_Ehdr *hdr,
+ const Elf_Shdr *sechdrs)
+{
+ const Elf_Shdr *s, *sun4v_1insn = NULL, *sun4v_2insn = NULL;
+ char *secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
+
+ for (s = sechdrs; s < sechdrs + hdr->e_shnum; s++) {
+ if (!strcmp(".sun4v_1insn_patch", secstrings + s->sh_name))
+ sun4v_1insn = s;
+ if (!strcmp(".sun4v_2insn_patch", secstrings + s->sh_name))
+ sun4v_2insn = s;
+ }
+
+ if (sun4v_1insn && tlb_type == hypervisor) {
+ void *p = (void *) sun4v_1insn->sh_addr;
+ sun4v_patch_1insn_range(p, p + sun4v_1insn->sh_size);
+ }
+ if (sun4v_2insn && tlb_type == hypervisor) {
+ void *p = (void *) sun4v_2insn->sh_addr;
+ sun4v_patch_2insn_range(p, p + sun4v_2insn->sh_size);
+ }
+}
+
+int module_finalize(const Elf_Ehdr *hdr,
+ const Elf_Shdr *sechdrs,
+ struct module *me)
+{
+ /* make jump label nops */
+ jump_label_apply_nops(me);
+
+ do_patch_sections(hdr, sechdrs);
+
+ /* Cheetah's I-cache is fully coherent. */
+ if (tlb_type == spitfire) {
+ unsigned long va;
+
+ flushw_all();
+ for (va = 0; va < (PAGE_SIZE << 1); va += 32)
+ spitfire_put_icache_tag(va, 0x0);
+ __asm__ __volatile__("flush %g6");
+ }
+
+ return 0;
+}
+#endif /* CONFIG_SPARC64 */