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authorPaul Mundt <lethal@linux-sh.org>2007-11-20 15:16:25 +0900
committerPaul Mundt <lethal@linux-sh.org>2008-01-28 13:18:49 +0900
commit1cb80fcfe2beafc55610ebd1cd4a03331d65f8ba (patch)
tree1562d21f0d948d9a45313c4e6d166af3cc6f0b81 /arch
parentsh: ioremap_64 needs after_bootmem. (diff)
downloadlinux-dev-1cb80fcfe2beafc55610ebd1cd4a03331d65f8ba.tar.xz
linux-dev-1cb80fcfe2beafc55610ebd1cd4a03331d65f8ba.zip
sh: Merge sh and sh64 module.c.
This is trivial, in that they're both effectively the same for the base relocations anyways. SH-5 doesn't need the unaligned bits, and has a few extra relocations, which are never hit on non-SH5 parts. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/sh/kernel/module.c62
-rw-r--r--arch/sh64/kernel/module.c161
2 files changed, 49 insertions, 174 deletions
diff --git a/arch/sh/kernel/module.c b/arch/sh/kernel/module.c
index 142a4e5b7ebc..b3d0a03b4c76 100644
--- a/arch/sh/kernel/module.c
+++ b/arch/sh/kernel/module.c
@@ -1,5 +1,15 @@
/* Kernel module help for SH.
+ SHcompact version by Kaz Kojima and Paul Mundt.
+
+ SHmedia bits:
+
+ Copyright 2004 SuperH (UK) Ltd
+ Author: Richard Curnow
+
+ Based on the sh version, and on code from the sh64-specific parts of
+ modutils, originally written by Richard Curnow and Ben Gaster.
+
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
@@ -21,12 +31,6 @@
#include <linux/string.h>
#include <linux/kernel.h>
-#if 0
-#define DEBUGP printk
-#else
-#define DEBUGP(fmt...)
-#endif
-
void *module_alloc(unsigned long size)
{
if (size == 0)
@@ -52,6 +56,7 @@ int module_frob_arch_sections(Elf_Ehdr *hdr,
return 0;
}
+#ifdef CONFIG_SUPERH32
#define COPY_UNALIGNED_WORD(sw, tw, align) \
{ \
void *__s = &(sw), *__t = &(tw); \
@@ -74,6 +79,10 @@ int module_frob_arch_sections(Elf_Ehdr *hdr,
break; \
} \
}
+#else
+/* One thing SHmedia doesn't screw up! */
+#define COPY_UNALIGNED_WORD(sw, tw, align) { (tw) = (sw); }
+#endif
int apply_relocate_add(Elf32_Shdr *sechdrs,
const char *strtab,
@@ -89,8 +98,8 @@ int apply_relocate_add(Elf32_Shdr *sechdrs,
uint32_t value;
int align;
- DEBUGP("Applying relocate section %u to %u\n", relsec,
- sechdrs[relsec].sh_info);
+ pr_debug("Applying relocate section %u to %u\n", relsec,
+ sechdrs[relsec].sh_info);
for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
/* This is where to make the change */
location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr
@@ -102,17 +111,44 @@ int apply_relocate_add(Elf32_Shdr *sechdrs,
relocation = sym->st_value + rel[i].r_addend;
align = (int)location & 3;
+#ifdef CONFIG_SUPERH64
+ /* For text addresses, bit2 of the st_other field indicates
+ * whether the symbol is SHmedia (1) or SHcompact (0). If
+ * SHmedia, the LSB of the symbol needs to be asserted
+ * for the CPU to be in SHmedia mode when it starts executing
+ * the branch target. */
+ relocation |= (sym->st_other & 4);
+#endif
+
switch (ELF32_R_TYPE(rel[i].r_info)) {
case R_SH_DIR32:
- COPY_UNALIGNED_WORD (*location, value, align);
+ COPY_UNALIGNED_WORD (*location, value, align);
value += relocation;
- COPY_UNALIGNED_WORD (value, *location, align);
+ COPY_UNALIGNED_WORD (value, *location, align);
break;
case R_SH_REL32:
- relocation = (relocation - (Elf32_Addr) location);
- COPY_UNALIGNED_WORD (*location, value, align);
+ relocation = (relocation - (Elf32_Addr) location);
+ COPY_UNALIGNED_WORD (*location, value, align);
value += relocation;
- COPY_UNALIGNED_WORD (value, *location, align);
+ COPY_UNALIGNED_WORD (value, *location, align);
+ break;
+ case R_SH_IMM_LOW16:
+ *location = (*location & ~0x3fffc00) |
+ ((relocation & 0xffff) << 10);
+ break;
+ case R_SH_IMM_MEDLOW16:
+ *location = (*location & ~0x3fffc00) |
+ (((relocation >> 16) & 0xffff) << 10);
+ break;
+ case R_SH_IMM_LOW16_PCREL:
+ relocation -= (Elf32_Addr) location;
+ *location = (*location & ~0x3fffc00) |
+ ((relocation & 0xffff) << 10);
+ break;
+ case R_SH_IMM_MEDLOW16_PCREL:
+ relocation -= (Elf32_Addr) location;
+ *location = (*location & ~0x3fffc00) |
+ (((relocation >> 16) & 0xffff) << 10);
break;
default:
printk(KERN_ERR "module %s: Unknown relocation: %u\n",
diff --git a/arch/sh64/kernel/module.c b/arch/sh64/kernel/module.c
deleted file mode 100644
index 2598f6b88b44..000000000000
--- a/arch/sh64/kernel/module.c
+++ /dev/null
@@ -1,161 +0,0 @@
-/* Kernel module help for sh64.
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-
- Copyright 2004 SuperH (UK) Ltd
- Author: Richard Curnow
-
- Based on the sh version, and on code from the sh64-specific parts of
- modutils, originally written by Richard Curnow and Ben Gaster.
-
-*/
-#include <linux/moduleloader.h>
-#include <linux/elf.h>
-#include <linux/vmalloc.h>
-#include <linux/fs.h>
-#include <linux/string.h>
-#include <linux/kernel.h>
-
-#if 0
-#define DEBUGP printk
-#else
-#define DEBUGP(fmt...)
-#endif
-
-void *module_alloc(unsigned long size)
-{
- if (size == 0)
- return NULL;
- return vmalloc(size);
-}
-
-
-/* Free memory returned from module_alloc */
-void module_free(struct module *mod, void *module_region)
-{
- vfree(module_region);
- /* FIXME: If module_region == mod->init_region, trim exception
- table entries. */
-}
-
-/* We don't need anything special. */
-int module_frob_arch_sections(Elf_Ehdr *hdr,
- Elf_Shdr *sechdrs,
- char *secstrings,
- struct module *mod)
-{
- return 0;
-}
-
-int apply_relocate_add(Elf32_Shdr *sechdrs,
- const char *strtab,
- unsigned int symindex,
- unsigned int relsec,
- struct module *me)
-{
- unsigned int i;
- Elf32_Rela *rel = (void *)sechdrs[relsec].sh_addr;
- Elf32_Sym *sym;
- Elf32_Addr relocation;
- uint32_t *location;
- int align;
- int is_shmedia;
-
- DEBUGP("Applying relocate section %u to %u\n", relsec,
- sechdrs[relsec].sh_info);
- for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rel); i++) {
- /* This is where to make the change */
- location = (void *)sechdrs[sechdrs[relsec].sh_info].sh_addr
- + rel[i].r_offset;
- /* This is the symbol it is referring to. Note that all
- undefined symbols have been resolved. */
- sym = (Elf32_Sym *)sechdrs[symindex].sh_addr
- + ELF32_R_SYM(rel[i].r_info);
- relocation = sym->st_value + rel[i].r_addend;
- align = (int)location & 3;
-
- /* For text addresses, bit2 of the st_other field indicates
- * whether the symbol is SHmedia (1) or SHcompact (0). If
- * SHmedia, the LSB of the symbol needs to be asserted
- * for the CPU to be in SHmedia mode when it starts executing
- * the branch target. */
- is_shmedia = (sym->st_other & 4) ? 1 : 0;
- if (is_shmedia) {
- relocation |= 1;
- }
-
- switch (ELF32_R_TYPE(rel[i].r_info)) {
- case R_SH_DIR32:
- DEBUGP("R_SH_DIR32 @%08lx = %08lx\n", (unsigned long) location, (unsigned long) relocation);
- *location += relocation;
- break;
- case R_SH_REL32:
- DEBUGP("R_SH_REL32 @%08lx = %08lx\n", (unsigned long) location, (unsigned long) relocation);
- relocation -= (Elf32_Addr) location;
- *location += relocation;
- break;
- case R_SH_IMM_LOW16:
- DEBUGP("R_SH_IMM_LOW16 @%08lx = %08lx\n", (unsigned long) location, (unsigned long) relocation);
- *location = (*location & ~0x3fffc00) |
- ((relocation & 0xffff) << 10);
- break;
- case R_SH_IMM_MEDLOW16:
- DEBUGP("R_SH_IMM_MEDLOW16 @%08lx = %08lx\n", (unsigned long) location, (unsigned long) relocation);
- *location = (*location & ~0x3fffc00) |
- (((relocation >> 16) & 0xffff) << 10);
- break;
- case R_SH_IMM_LOW16_PCREL:
- DEBUGP("R_SH_IMM_LOW16_PCREL @%08lx = %08lx\n", (unsigned long) location, (unsigned long) relocation);
- relocation -= (Elf32_Addr) location;
- *location = (*location & ~0x3fffc00) |
- ((relocation & 0xffff) << 10);
- break;
- case R_SH_IMM_MEDLOW16_PCREL:
- DEBUGP("R_SH_IMM_MEDLOW16_PCREL @%08lx = %08lx\n", (unsigned long) location, (unsigned long) relocation);
- relocation -= (Elf32_Addr) location;
- *location = (*location & ~0x3fffc00) |
- (((relocation >> 16) & 0xffff) << 10);
- break;
- default:
- printk(KERN_ERR "module %s: Unknown relocation: %u\n",
- me->name, ELF32_R_TYPE(rel[i].r_info));
- return -ENOEXEC;
- }
- }
- return 0;
-}
-
-int apply_relocate(Elf32_Shdr *sechdrs,
- const char *strtab,
- unsigned int symindex,
- unsigned int relsec,
- struct module *me)
-{
- printk(KERN_ERR "module %s: REL RELOCATION unsupported\n",
- me->name);
- return -ENOEXEC;
-}
-
-int module_finalize(const Elf_Ehdr *hdr,
- const Elf_Shdr *sechdrs,
- struct module *me)
-{
- return 0;
-}
-
-void module_arch_cleanup(struct module *mod)
-{
-}
-