From 37f49e37ab4cb5d0bc4c60eb5c6d4dd57db767bb Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 10 May 2024 07:44:59 +0000
Subject: [PATCH] gmac get mac form eeprom
---
kernel/arch/x86/kernel/module.c | 77 ++++++++++++++++++++++++++++----------
1 files changed, 56 insertions(+), 21 deletions(-)
diff --git a/kernel/arch/x86/kernel/module.c b/kernel/arch/x86/kernel/module.c
index afc0302..eeb6992 100644
--- a/kernel/arch/x86/kernel/module.c
+++ b/kernel/arch/x86/kernel/module.c
@@ -1,19 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/* Kernel module help for x86.
Copyright (C) 2001 Rusty Russell.
- 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
*/
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@@ -30,10 +18,10 @@
#include <linux/gfp.h>
#include <linux/jump_label.h>
#include <linux/random.h>
+#include <linux/memory.h>
#include <asm/text-patching.h>
#include <asm/page.h>
-#include <asm/pgtable.h>
#include <asm/setup.h>
#include <asm/unwind.h>
@@ -139,11 +127,12 @@
return 0;
}
#else /*X86_64*/
-int apply_relocate_add(Elf64_Shdr *sechdrs,
+static int __apply_relocate_add(Elf64_Shdr *sechdrs,
const char *strtab,
unsigned int symindex,
unsigned int relsec,
- struct module *me)
+ struct module *me,
+ void *(*write)(void *dest, const void *src, size_t len))
{
unsigned int i;
Elf64_Rela *rel = (void *)sechdrs[relsec].sh_addr;
@@ -175,19 +164,19 @@
case R_X86_64_64:
if (*(u64 *)loc != 0)
goto invalid_relocation;
- *(u64 *)loc = val;
+ write(loc, &val, 8);
break;
case R_X86_64_32:
if (*(u32 *)loc != 0)
goto invalid_relocation;
- *(u32 *)loc = val;
+ write(loc, &val, 4);
if (val != *(u32 *)loc)
goto overflow;
break;
case R_X86_64_32S:
if (*(s32 *)loc != 0)
goto invalid_relocation;
- *(s32 *)loc = val;
+ write(loc, &val, 4);
if ((s64)val != *(s32 *)loc)
goto overflow;
break;
@@ -196,11 +185,17 @@
if (*(u32 *)loc != 0)
goto invalid_relocation;
val -= (u64)loc;
- *(u32 *)loc = val;
+ write(loc, &val, 4);
#if 0
if ((s64)val != *(s32 *)loc)
goto overflow;
#endif
+ break;
+ case R_X86_64_PC64:
+ if (*(u64 *)loc != 0)
+ goto invalid_relocation;
+ val -= (u64)loc;
+ write(loc, &val, 8);
break;
case R_X86_64_8:
if (!strncmp(strtab + sym->st_name, "__typeid__", 10))
@@ -226,6 +221,33 @@
me->name);
return -ENOEXEC;
}
+
+int apply_relocate_add(Elf64_Shdr *sechdrs,
+ const char *strtab,
+ unsigned int symindex,
+ unsigned int relsec,
+ struct module *me)
+{
+ int ret;
+ bool early = me->state == MODULE_STATE_UNFORMED;
+ void *(*write)(void *, const void *, size_t) = memcpy;
+
+ if (!early) {
+ write = text_poke;
+ mutex_lock(&text_mutex);
+ }
+
+ ret = __apply_relocate_add(sechdrs, strtab, symindex, relsec, me,
+ write);
+
+ if (!early) {
+ text_poke_sync();
+ mutex_unlock(&text_mutex);
+ }
+
+ return ret;
+}
+
#endif
int module_finalize(const Elf_Ehdr *hdr,
@@ -233,7 +255,8 @@
struct module *me)
{
const Elf_Shdr *s, *text = NULL, *alt = NULL, *locks = NULL,
- *para = NULL, *orc = NULL, *orc_ip = NULL;
+ *para = NULL, *orc = NULL, *orc_ip = NULL,
+ *retpolines = NULL, *returns = NULL;
char *secstrings = (void *)hdr + sechdrs[hdr->e_shstrndx].sh_offset;
for (s = sechdrs; s < sechdrs + hdr->e_shnum; s++) {
@@ -249,8 +272,20 @@
orc = s;
if (!strcmp(".orc_unwind_ip", secstrings + s->sh_name))
orc_ip = s;
+ if (!strcmp(".retpoline_sites", secstrings + s->sh_name))
+ retpolines = s;
+ if (!strcmp(".return_sites", secstrings + s->sh_name))
+ returns = s;
}
+ if (retpolines) {
+ void *rseg = (void *)retpolines->sh_addr;
+ apply_retpolines(rseg, rseg + retpolines->sh_size);
+ }
+ if (returns) {
+ void *rseg = (void *)returns->sh_addr;
+ apply_returns(rseg, rseg + returns->sh_size);
+ }
if (alt) {
/* patch .altinstructions */
void *aseg = (void *)alt->sh_addr;
--
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