mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-04 12:16:56 +07:00
66574cc054
This patch removes all the module loader hook implementations in the architecture specific code where the functionality is the same as that now provided by the recently added default hooks. Signed-off-by: Jonas Bonn <jonas@southpole.se> Acked-by: Mike Frysinger <vapier@gentoo.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Tested-by: Michal Simek <monstr@monstr.eu> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
76 lines
2.0 KiB
C
76 lines
2.0 KiB
C
#include <linux/moduleloader.h>
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#include <linux/elf.h>
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#include <linux/vmalloc.h>
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#include <linux/fs.h>
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#include <linux/string.h>
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#include <linux/kernel.h>
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#if 0
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#define DEBUGP printk
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#else
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#define DEBUGP(fmt...)
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#endif
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int apply_relocate_add(Elf32_Shdr *sechdrs,
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const char *strtab,
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unsigned int symindex,
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unsigned int relsec,
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struct module *me)
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{
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unsigned int i;
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Elf32_Rela *rela = (void *)sechdrs[relsec].sh_addr;
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DEBUGP("Applying relocate section %u to %u\n", relsec,
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sechdrs[relsec].sh_info);
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for (i = 0; i < sechdrs[relsec].sh_size / sizeof(*rela); i++) {
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/* This is where to make the change */
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uint32_t *loc = (uint32_t *)(sechdrs[sechdrs[relsec].sh_info].sh_addr
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+ rela[i].r_offset);
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/* This is the symbol it is referring to. Note that all
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undefined symbols have been resolved. */
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Elf32_Sym *sym = (Elf32_Sym *)sechdrs[symindex].sh_addr
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+ ELF32_R_SYM(rela[i].r_info);
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uint32_t v = sym->st_value + rela[i].r_addend;
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switch (ELF32_R_TYPE(rela[i].r_info)) {
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case R_H8_DIR24R8:
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loc = (uint32_t *)((uint32_t)loc - 1);
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*loc = (*loc & 0xff000000) | ((*loc & 0xffffff) + v);
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break;
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case R_H8_DIR24A8:
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if (ELF32_R_SYM(rela[i].r_info))
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*loc += v;
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break;
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case R_H8_DIR32:
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case R_H8_DIR32A16:
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*loc += v;
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break;
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case R_H8_PCREL16:
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v -= (unsigned long)loc + 2;
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if ((Elf32_Sword)v > 0x7fff ||
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(Elf32_Sword)v < -(Elf32_Sword)0x8000)
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goto overflow;
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else
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*(unsigned short *)loc = v;
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break;
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case R_H8_PCREL8:
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v -= (unsigned long)loc + 1;
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if ((Elf32_Sword)v > 0x7f ||
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(Elf32_Sword)v < -(Elf32_Sword)0x80)
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goto overflow;
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else
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*(unsigned char *)loc = v;
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break;
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default:
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printk(KERN_ERR "module %s: Unknown relocation: %u\n",
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me->name, ELF32_R_TYPE(rela[i].r_info));
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return -ENOEXEC;
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}
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}
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return 0;
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overflow:
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printk(KERN_ERR "module %s: relocation offset overflow: %08x\n",
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me->name, rela[i].r_offset);
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return -ENOEXEC;
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}
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