forked from luck/tmp_suning_uos_patched
d2912cb15b
Based on 2 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation this program is free software you can redistribute it and or modify it under the terms of the gnu general public license version 2 as published by the free software foundation # extracted by the scancode license scanner the SPDX license identifier GPL-2.0-only has been chosen to replace the boilerplate/reference in 4122 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Enrico Weigelt <info@metux.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
120 lines
3.0 KiB
C
120 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Port on Texas Instruments TMS320C6x architecture
|
|
*
|
|
* Copyright (C) 2005, 2009, 2010, 2011 Texas Instruments Incorporated
|
|
* Author: Thomas Charleux (thomas.charleux@jaluna.com)
|
|
*/
|
|
#include <linux/moduleloader.h>
|
|
#include <linux/elf.h>
|
|
#include <linux/vmalloc.h>
|
|
#include <linux/kernel.h>
|
|
|
|
static inline int fixup_pcr(u32 *ip, Elf32_Addr dest, u32 maskbits, int shift)
|
|
{
|
|
u32 opcode;
|
|
long ep = (long)ip & ~31;
|
|
long delta = ((long)dest - ep) >> 2;
|
|
long mask = (1 << maskbits) - 1;
|
|
|
|
if ((delta >> (maskbits - 1)) == 0 ||
|
|
(delta >> (maskbits - 1)) == -1) {
|
|
opcode = *ip;
|
|
opcode &= ~(mask << shift);
|
|
opcode |= ((delta & mask) << shift);
|
|
*ip = opcode;
|
|
|
|
pr_debug("REL PCR_S%d[%p] dest[%p] opcode[%08x]\n",
|
|
maskbits, ip, (void *)dest, opcode);
|
|
|
|
return 0;
|
|
}
|
|
pr_err("PCR_S%d reloc %p -> %p out of range!\n",
|
|
maskbits, ip, (void *)dest);
|
|
|
|
return -1;
|
|
}
|
|
|
|
/*
|
|
* apply a RELA relocation
|
|
*/
|
|
int apply_relocate_add(Elf32_Shdr *sechdrs,
|
|
const char *strtab,
|
|
unsigned int symindex,
|
|
unsigned int relsec,
|
|
struct module *me)
|
|
{
|
|
Elf32_Rela *rel = (void *) sechdrs[relsec].sh_addr;
|
|
Elf_Sym *sym;
|
|
u32 *location, opcode;
|
|
unsigned int i;
|
|
Elf32_Addr v;
|
|
Elf_Addr offset = 0;
|
|
|
|
pr_debug("Applying relocate section %u to %u with offset 0x%x\n",
|
|
relsec, sechdrs[relsec].sh_info, offset);
|
|
|
|
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 - offset;
|
|
|
|
/* This is the symbol it is referring to. Note that all
|
|
undefined symbols have been resolved. */
|
|
sym = (Elf_Sym *)sechdrs[symindex].sh_addr
|
|
+ ELF32_R_SYM(rel[i].r_info);
|
|
|
|
/* this is the adjustment to be made */
|
|
v = sym->st_value + rel[i].r_addend;
|
|
|
|
switch (ELF32_R_TYPE(rel[i].r_info)) {
|
|
case R_C6000_ABS32:
|
|
pr_debug("RELA ABS32: [%p] = 0x%x\n", location, v);
|
|
*location = v;
|
|
break;
|
|
case R_C6000_ABS16:
|
|
pr_debug("RELA ABS16: [%p] = 0x%x\n", location, v);
|
|
*(u16 *)location = v;
|
|
break;
|
|
case R_C6000_ABS8:
|
|
pr_debug("RELA ABS8: [%p] = 0x%x\n", location, v);
|
|
*(u8 *)location = v;
|
|
break;
|
|
case R_C6000_ABS_L16:
|
|
opcode = *location;
|
|
opcode &= ~0x7fff80;
|
|
opcode |= ((v & 0xffff) << 7);
|
|
pr_debug("RELA ABS_L16[%p] v[0x%x] opcode[0x%x]\n",
|
|
location, v, opcode);
|
|
*location = opcode;
|
|
break;
|
|
case R_C6000_ABS_H16:
|
|
opcode = *location;
|
|
opcode &= ~0x7fff80;
|
|
opcode |= ((v >> 9) & 0x7fff80);
|
|
pr_debug("RELA ABS_H16[%p] v[0x%x] opcode[0x%x]\n",
|
|
location, v, opcode);
|
|
*location = opcode;
|
|
break;
|
|
case R_C6000_PCR_S21:
|
|
if (fixup_pcr(location, v, 21, 7))
|
|
return -ENOEXEC;
|
|
break;
|
|
case R_C6000_PCR_S12:
|
|
if (fixup_pcr(location, v, 12, 16))
|
|
return -ENOEXEC;
|
|
break;
|
|
case R_C6000_PCR_S10:
|
|
if (fixup_pcr(location, v, 10, 13))
|
|
return -ENOEXEC;
|
|
break;
|
|
default:
|
|
pr_err("module %s: Unknown RELA relocation: %u\n",
|
|
me->name, ELF32_R_TYPE(rel[i].r_info));
|
|
return -ENOEXEC;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|