mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-25 10:43:41 +07:00
c9a4a8da6b
This patch adds support for loadable modules. Signed-off-by: Vincent Chen <vincentc@andestech.com> Signed-off-by: Greentime Hu <greentime@andestech.com> Acked-by: Arnd Bergmann <arnd@arndb.de>
279 lines
7.3 KiB
C
279 lines
7.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
// Copyright (C) 2005-2017 Andes Technology Corporation
|
|
|
|
#include <linux/module.h>
|
|
#include <linux/elf.h>
|
|
#include <linux/vmalloc.h>
|
|
#include <linux/moduleloader.h>
|
|
#include <asm/pgtable.h>
|
|
|
|
void *module_alloc(unsigned long size)
|
|
{
|
|
return __vmalloc_node_range(size, 1, MODULES_VADDR, MODULES_END,
|
|
GFP_KERNEL, PAGE_KERNEL, 0, NUMA_NO_NODE,
|
|
__builtin_return_address(0));
|
|
}
|
|
|
|
void module_free(struct module *module, void *region)
|
|
{
|
|
vfree(region);
|
|
}
|
|
|
|
int module_frob_arch_sections(Elf_Ehdr * hdr,
|
|
Elf_Shdr * sechdrs,
|
|
char *secstrings, struct module *mod)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
void do_reloc16(unsigned int val, unsigned int *loc, unsigned int val_mask,
|
|
unsigned int val_shift, unsigned int loc_mask,
|
|
unsigned int partial_in_place, unsigned int swap)
|
|
{
|
|
unsigned int tmp = 0, tmp2 = 0;
|
|
|
|
__asm__ __volatile__("\tlhi.bi\t%0, [%2], 0\n"
|
|
"\tbeqz\t%3, 1f\n"
|
|
"\twsbh\t%0, %1\n"
|
|
"1:\n":"=r"(tmp):"0"(tmp), "r"(loc), "r"(swap)
|
|
);
|
|
|
|
tmp2 = tmp & loc_mask;
|
|
if (partial_in_place) {
|
|
tmp &= (!loc_mask);
|
|
tmp =
|
|
tmp2 | ((tmp + ((val & val_mask) >> val_shift)) & val_mask);
|
|
} else {
|
|
tmp = tmp2 | ((val & val_mask) >> val_shift);
|
|
}
|
|
|
|
__asm__ __volatile__("\tbeqz\t%3, 2f\n"
|
|
"\twsbh\t%0, %1\n"
|
|
"2:\n"
|
|
"\tshi.bi\t%0, [%2], 0\n":"=r"(tmp):"0"(tmp),
|
|
"r"(loc), "r"(swap)
|
|
);
|
|
}
|
|
|
|
void do_reloc32(unsigned int val, unsigned int *loc, unsigned int val_mask,
|
|
unsigned int val_shift, unsigned int loc_mask,
|
|
unsigned int partial_in_place, unsigned int swap)
|
|
{
|
|
unsigned int tmp = 0, tmp2 = 0;
|
|
|
|
__asm__ __volatile__("\tlmw.bi\t%0, [%2], %0, 0\n"
|
|
"\tbeqz\t%3, 1f\n"
|
|
"\twsbh\t%0, %1\n"
|
|
"\trotri\t%0, %1, 16\n"
|
|
"1:\n":"=r"(tmp):"0"(tmp), "r"(loc), "r"(swap)
|
|
);
|
|
|
|
tmp2 = tmp & loc_mask;
|
|
if (partial_in_place) {
|
|
tmp &= (!loc_mask);
|
|
tmp =
|
|
tmp2 | ((tmp + ((val & val_mask) >> val_shift)) & val_mask);
|
|
} else {
|
|
tmp = tmp2 | ((val & val_mask) >> val_shift);
|
|
}
|
|
|
|
__asm__ __volatile__("\tbeqz\t%3, 2f\n"
|
|
"\twsbh\t%0, %1\n"
|
|
"\trotri\t%0, %1, 16\n"
|
|
"2:\n"
|
|
"\tsmw.bi\t%0, [%2], %0, 0\n":"=r"(tmp):"0"(tmp),
|
|
"r"(loc), "r"(swap)
|
|
);
|
|
}
|
|
|
|
static inline int exceed_limit(int offset, unsigned int val_mask,
|
|
struct module *module, Elf32_Rela * rel,
|
|
unsigned int relindex, unsigned int reloc_order)
|
|
{
|
|
int abs_off = offset < 0 ? ~offset : offset;
|
|
|
|
if (abs_off & (~val_mask)) {
|
|
pr_err("\n%s: relocation type %d out of range.\n"
|
|
"please rebuild the kernel module with gcc option \"-Wa,-mno-small-text\".\n",
|
|
module->name, ELF32_R_TYPE(rel->r_info));
|
|
pr_err("section %d reloc %d offset 0x%x relative 0x%x.\n",
|
|
relindex, reloc_order, rel->r_offset, offset);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
#ifdef __NDS32_EL__
|
|
#define NEED_SWAP 1
|
|
#else
|
|
#define NEED_SWAP 0
|
|
#endif
|
|
|
|
int
|
|
apply_relocate_add(Elf32_Shdr * sechdrs, const char *strtab,
|
|
unsigned int symindex, unsigned int relindex,
|
|
struct module *module)
|
|
{
|
|
Elf32_Shdr *symsec = sechdrs + symindex;
|
|
Elf32_Shdr *relsec = sechdrs + relindex;
|
|
Elf32_Shdr *dstsec = sechdrs + relsec->sh_info;
|
|
Elf32_Rela *rel = (void *)relsec->sh_addr;
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < relsec->sh_size / sizeof(Elf32_Rela); i++, rel++) {
|
|
Elf32_Addr *loc;
|
|
Elf32_Sym *sym;
|
|
Elf32_Addr v;
|
|
s32 offset;
|
|
|
|
offset = ELF32_R_SYM(rel->r_info);
|
|
if (offset < 0
|
|
|| offset > (symsec->sh_size / sizeof(Elf32_Sym))) {
|
|
pr_err("%s: bad relocation\n", module->name);
|
|
pr_err("section %d reloc %d\n", relindex, i);
|
|
return -ENOEXEC;
|
|
}
|
|
|
|
sym = ((Elf32_Sym *) symsec->sh_addr) + offset;
|
|
|
|
if (rel->r_offset < 0
|
|
|| rel->r_offset > dstsec->sh_size - sizeof(u16)) {
|
|
pr_err("%s: out of bounds relocation\n", module->name);
|
|
pr_err("section %d reloc %d offset 0x%0x size %d\n",
|
|
relindex, i, rel->r_offset, dstsec->sh_size);
|
|
return -ENOEXEC;
|
|
}
|
|
|
|
loc = (Elf32_Addr *) (dstsec->sh_addr + rel->r_offset);
|
|
v = sym->st_value + rel->r_addend;
|
|
|
|
switch (ELF32_R_TYPE(rel->r_info)) {
|
|
case R_NDS32_NONE:
|
|
case R_NDS32_INSN16:
|
|
case R_NDS32_LABEL:
|
|
case R_NDS32_LONGCALL1:
|
|
case R_NDS32_LONGCALL2:
|
|
case R_NDS32_LONGCALL3:
|
|
case R_NDS32_LONGCALL4:
|
|
case R_NDS32_LONGJUMP1:
|
|
case R_NDS32_LONGJUMP2:
|
|
case R_NDS32_LONGJUMP3:
|
|
case R_NDS32_9_FIXED_RELA:
|
|
case R_NDS32_15_FIXED_RELA:
|
|
case R_NDS32_17_FIXED_RELA:
|
|
case R_NDS32_25_FIXED_RELA:
|
|
case R_NDS32_LOADSTORE:
|
|
case R_NDS32_DWARF2_OP1_RELA:
|
|
case R_NDS32_DWARF2_OP2_RELA:
|
|
case R_NDS32_DWARF2_LEB_RELA:
|
|
case R_NDS32_RELA_NOP_MIX ... R_NDS32_RELA_NOP_MAX:
|
|
break;
|
|
|
|
case R_NDS32_32_RELA:
|
|
do_reloc32(v, loc, 0xffffffff, 0, 0, 0, 0);
|
|
break;
|
|
|
|
case R_NDS32_HI20_RELA:
|
|
do_reloc32(v, loc, 0xfffff000, 12, 0xfff00000, 0,
|
|
NEED_SWAP);
|
|
break;
|
|
|
|
case R_NDS32_LO12S3_RELA:
|
|
do_reloc32(v, loc, 0x00000fff, 3, 0xfffff000, 0,
|
|
NEED_SWAP);
|
|
break;
|
|
|
|
case R_NDS32_LO12S2_RELA:
|
|
do_reloc32(v, loc, 0x00000fff, 2, 0xfffff000, 0,
|
|
NEED_SWAP);
|
|
break;
|
|
|
|
case R_NDS32_LO12S1_RELA:
|
|
do_reloc32(v, loc, 0x00000fff, 1, 0xfffff000, 0,
|
|
NEED_SWAP);
|
|
break;
|
|
|
|
case R_NDS32_LO12S0_RELA:
|
|
case R_NDS32_LO12S0_ORI_RELA:
|
|
do_reloc32(v, loc, 0x00000fff, 0, 0xfffff000, 0,
|
|
NEED_SWAP);
|
|
break;
|
|
|
|
case R_NDS32_9_PCREL_RELA:
|
|
if (exceed_limit
|
|
((v - (Elf32_Addr) loc), 0x000000ff, module, rel,
|
|
relindex, i))
|
|
return -ENOEXEC;
|
|
do_reloc16(v - (Elf32_Addr) loc, loc, 0x000001ff, 1,
|
|
0xffffff00, 0, NEED_SWAP);
|
|
break;
|
|
|
|
case R_NDS32_15_PCREL_RELA:
|
|
if (exceed_limit
|
|
((v - (Elf32_Addr) loc), 0x00003fff, module, rel,
|
|
relindex, i))
|
|
return -ENOEXEC;
|
|
do_reloc32(v - (Elf32_Addr) loc, loc, 0x00007fff, 1,
|
|
0xffffc000, 0, NEED_SWAP);
|
|
break;
|
|
|
|
case R_NDS32_17_PCREL_RELA:
|
|
if (exceed_limit
|
|
((v - (Elf32_Addr) loc), 0x0000ffff, module, rel,
|
|
relindex, i))
|
|
return -ENOEXEC;
|
|
do_reloc32(v - (Elf32_Addr) loc, loc, 0x0001ffff, 1,
|
|
0xffff0000, 0, NEED_SWAP);
|
|
break;
|
|
|
|
case R_NDS32_25_PCREL_RELA:
|
|
if (exceed_limit
|
|
((v - (Elf32_Addr) loc), 0x00ffffff, module, rel,
|
|
relindex, i))
|
|
return -ENOEXEC;
|
|
do_reloc32(v - (Elf32_Addr) loc, loc, 0x01ffffff, 1,
|
|
0xff000000, 0, NEED_SWAP);
|
|
break;
|
|
case R_NDS32_WORD_9_PCREL_RELA:
|
|
if (exceed_limit
|
|
((v - (Elf32_Addr) loc), 0x000000ff, module, rel,
|
|
relindex, i))
|
|
return -ENOEXEC;
|
|
do_reloc32(v - (Elf32_Addr) loc, loc, 0x000001ff, 1,
|
|
0xffffff00, 0, NEED_SWAP);
|
|
break;
|
|
|
|
case R_NDS32_SDA15S3_RELA:
|
|
case R_NDS32_SDA15S2_RELA:
|
|
case R_NDS32_SDA15S1_RELA:
|
|
case R_NDS32_SDA15S0_RELA:
|
|
pr_err("%s: unsupported relocation type %d.\n",
|
|
module->name, ELF32_R_TYPE(rel->r_info));
|
|
pr_err
|
|
("Small data section access doesn't work in the kernel space; "
|
|
"please rebuild the kernel module with gcc option -mcmodel=large.\n");
|
|
pr_err("section %d reloc %d offset 0x%x size %d\n",
|
|
relindex, i, rel->r_offset, dstsec->sh_size);
|
|
break;
|
|
|
|
default:
|
|
pr_err("%s: unsupported relocation type %d.\n",
|
|
module->name, ELF32_R_TYPE(rel->r_info));
|
|
pr_err("section %d reloc %d offset 0x%x size %d\n",
|
|
relindex, i, rel->r_offset, dstsec->sh_size);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
module_finalize(const Elf32_Ehdr * hdr, const Elf_Shdr * sechdrs,
|
|
struct module *module)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
void module_arch_cleanup(struct module *mod)
|
|
{
|
|
}
|