From a36159eec6ca17402b0e146b86efaf76568dc353 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Fri, 20 Sep 2024 01:41:23 +0000
Subject: [PATCH] 重命名 AX88772C_eeprom/asix.c 为 asix_mac.c
---
kernel/arch/x86/kernel/vmlinux.lds.S | 181 +++++++++++++++++++++++++++++++++++---------
1 files changed, 143 insertions(+), 38 deletions(-)
diff --git a/kernel/arch/x86/kernel/vmlinux.lds.S b/kernel/arch/x86/kernel/vmlinux.lds.S
index 9c26cbc..b6729ca 100644
--- a/kernel/arch/x86/kernel/vmlinux.lds.S
+++ b/kernel/arch/x86/kernel/vmlinux.lds.S
@@ -21,6 +21,10 @@
#define LOAD_OFFSET __START_KERNEL_map
#endif
+#define RUNTIME_DISCARD_EXIT
+#define EMITS_PT_NOTE
+#define RO_EXCEPTION_TABLE_ALIGN 16
+
#include <asm-generic/vmlinux.lds.h>
#include <asm/asm-offsets.h>
#include <asm/thread_info.h>
@@ -31,7 +35,7 @@
#undef i386 /* in case the preprocessor is a 32bit one */
-OUTPUT_FORMAT(CONFIG_OUTPUT_FORMAT, CONFIG_OUTPUT_FORMAT, CONFIG_OUTPUT_FORMAT)
+OUTPUT_FORMAT(CONFIG_OUTPUT_FORMAT)
#ifdef CONFIG_X86_32
OUTPUT_ARCH(i386)
@@ -129,43 +133,37 @@
LOCK_TEXT
KPROBES_TEXT
ALIGN_ENTRY_TEXT_BEGIN
+#ifdef CONFIG_CPU_SRSO
+ *(.text..__x86.rethunk_untrain)
+#endif
+
ENTRY_TEXT
- IRQENTRY_TEXT
+
+#ifdef CONFIG_CPU_SRSO
+ /*
+ * See the comment above srso_alias_untrain_ret()'s
+ * definition.
+ */
+ . = srso_alias_untrain_ret | (1 << 2) | (1 << 8) | (1 << 14) | (1 << 20);
+ *(.text..__x86.rethunk_safe)
+#endif
ALIGN_ENTRY_TEXT_END
SOFTIRQENTRY_TEXT
+ STATIC_CALL_TEXT
*(.fixup)
*(.gnu.warning)
-#ifdef CONFIG_X86_64
- . = ALIGN(PAGE_SIZE);
- __entry_trampoline_start = .;
- _entry_trampoline = .;
- *(.entry_trampoline)
- . = ALIGN(PAGE_SIZE);
- __entry_trampoline_end = .;
- ASSERT(. - _entry_trampoline == PAGE_SIZE, "entry trampoline is too big");
-#endif
-
#ifdef CONFIG_RETPOLINE
__indirect_thunk_start = .;
- *(.text.__x86.indirect_thunk)
+ *(.text..__x86.indirect_thunk)
+ *(.text..__x86.return_thunk)
__indirect_thunk_end = .;
#endif
-
-#ifdef CONFIG_CFI_CLANG
- . = ALIGN(PAGE_SIZE);
- __cfi_jt_start = .;
- *(.text..L.cfi.jumptable .text..L.cfi.jumptable.*)
- __cfi_jt_end = .;
-#endif
- } :text = 0x9090
-
- NOTES :text :note
-
- EXCEPTION_TABLE(16) :text = 0x9090
+ } :text =0xcccc
/* End of text section, which should occupy whole number of pages */
_etext = .;
+
. = ALIGN(PAGE_SIZE);
X86_ALIGN_RODATA_BEGIN
@@ -211,12 +209,10 @@
__vvar_beginning_hack = .;
/* Place all vvars at the offsets in asm/vvar.h. */
-#define EMIT_VVAR(name, offset) \
+#define EMIT_VVAR(name, offset) \
. = __vvar_beginning_hack + offset; \
*(.vvar_ ## name)
-#define __VVAR_KERNEL_LDS
#include <asm/vvar.h>
-#undef __VVAR_KERNEL_LDS
#undef EMIT_VVAR
/*
@@ -291,6 +287,27 @@
__parainstructions_end = .;
}
+#ifdef CONFIG_RETPOLINE
+ /*
+ * List of instructions that call/jmp/jcc to retpoline thunks
+ * __x86_indirect_thunk_*(). These instructions can be patched along
+ * with alternatives, after which the section can be freed.
+ */
+ . = ALIGN(8);
+ .retpoline_sites : AT(ADDR(.retpoline_sites) - LOAD_OFFSET) {
+ __retpoline_sites = .;
+ *(.retpoline_sites)
+ __retpoline_sites_end = .;
+ }
+
+ . = ALIGN(8);
+ .return_sites : AT(ADDR(.return_sites) - LOAD_OFFSET) {
+ __return_sites = .;
+ *(.return_sites)
+ __return_sites_end = .;
+ }
+#endif
+
/*
* struct alt_inst entries. From the header (alternative.h):
* "Alternative instructions for different CPU types or capabilities"
@@ -333,8 +350,8 @@
. = ALIGN(8);
/*
- * .exit.text is discard at runtime, not link time, to deal with
- * references from .altinstructions and .eh_frame
+ * .exit.text is discarded at runtime, not link time, to deal with
+ * references from .altinstructions
*/
.exit.text : AT(ADDR(.exit.text) - LOAD_OFFSET) {
EXIT_TEXT
@@ -385,6 +402,14 @@
__bss_stop = .;
}
+ /*
+ * The memory occupied from _text to here, __end_of_kernel_reserve, is
+ * automatically reserved in setup_arch(). Anything after here must be
+ * explicitly reserved using memblock_reserve() or it will be discarded
+ * and treated as available memory.
+ */
+ __end_of_kernel_reserve = .;
+
. = ALIGN(PAGE_SIZE);
.brk : AT(ADDR(.brk) - LOAD_OFFSET) {
__brk_base = .;
@@ -396,16 +421,74 @@
. = ALIGN(PAGE_SIZE); /* keep VO_INIT_SIZE page aligned */
_end = .;
+#ifdef CONFIG_AMD_MEM_ENCRYPT
+ /*
+ * Early scratch/workarea section: Lives outside of the kernel proper
+ * (_text - _end).
+ *
+ * Resides after _end because even though the .brk section is after
+ * __end_of_kernel_reserve, the .brk section is later reserved as a
+ * part of the kernel. Since it is located after __end_of_kernel_reserve
+ * it will be discarded and become part of the available memory. As
+ * such, it can only be used by very early boot code and must not be
+ * needed afterwards.
+ *
+ * Currently used by SME for performing in-place encryption of the
+ * kernel during boot. Resides on a 2MB boundary to simplify the
+ * pagetable setup used for SME in-place encryption.
+ */
+ . = ALIGN(HPAGE_SIZE);
+ .init.scratch : AT(ADDR(.init.scratch) - LOAD_OFFSET) {
+ __init_scratch_begin = .;
+ *(.init.scratch)
+ . = ALIGN(HPAGE_SIZE);
+ __init_scratch_end = .;
+ }
+#endif
+
STABS_DEBUG
DWARF_DEBUG
+ ELF_DETAILS
- /* Sections to be discarded */
DISCARDS
- /DISCARD/ : {
- *(.eh_frame)
- }
-}
+ /*
+ * Make sure that the .got.plt is either completely empty or it
+ * contains only the lazy dispatch entries.
+ */
+ .got.plt (INFO) : { *(.got.plt) }
+ ASSERT(SIZEOF(.got.plt) == 0 ||
+#ifdef CONFIG_X86_64
+ SIZEOF(.got.plt) == 0x18,
+#else
+ SIZEOF(.got.plt) == 0xc,
+#endif
+ "Unexpected GOT/PLT entries detected!")
+
+ /*
+ * Sections that should stay zero sized, which is safer to
+ * explicitly check instead of blindly discarding.
+ */
+ .got : {
+ *(.got) *(.igot.*)
+ }
+ ASSERT(SIZEOF(.got) == 0, "Unexpected GOT entries detected!")
+
+ .plt : {
+ *(.plt) *(.plt.*) *(.iplt)
+ }
+ ASSERT(SIZEOF(.plt) == 0, "Unexpected run-time procedure linkages detected!")
+
+ .rel.dyn : {
+ *(.rel.*) *(.rel_*)
+ }
+ ASSERT(SIZEOF(.rel.dyn) == 0, "Unexpected run-time relocations (.rel) detected!")
+
+ .rela.dyn : {
+ *(.rela.*) *(.rela_*)
+ }
+ ASSERT(SIZEOF(.rela.dyn) == 0, "Unexpected run-time relocations (.rela) detected!")
+}
#ifdef CONFIG_X86_32
/*
@@ -420,7 +503,8 @@
*/
#define INIT_PER_CPU(x) init_per_cpu__##x = ABSOLUTE(x) + __per_cpu_load
INIT_PER_CPU(gdt_page);
-INIT_PER_CPU(irq_stack_union);
+INIT_PER_CPU(fixed_percpu_data);
+INIT_PER_CPU(irq_stack_backing_store);
/*
* Build-time check on the image size:
@@ -429,8 +513,29 @@
"kernel image bigger than KERNEL_IMAGE_SIZE");
#ifdef CONFIG_SMP
-. = ASSERT((irq_stack_union == 0),
- "irq_stack_union is not at start of per-cpu area");
+. = ASSERT((fixed_percpu_data == 0),
+ "fixed_percpu_data is not at start of per-cpu area");
+#endif
+
+#ifdef CONFIG_RETHUNK
+. = ASSERT((retbleed_return_thunk & 0x3f) == 0, "retbleed_return_thunk not cacheline-aligned");
+. = ASSERT((srso_safe_ret & 0x3f) == 0, "srso_safe_ret not cacheline-aligned");
+#endif
+
+#ifdef CONFIG_CPU_SRSO
+/*
+ * GNU ld cannot do XOR until 2.41.
+ * https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=f6f78318fca803c4907fb8d7f6ded8295f1947b1
+ *
+ * LLVM lld cannot do XOR until lld-17.
+ * https://github.com/llvm/llvm-project/commit/fae96104d4378166cbe5c875ef8ed808a356f3fb
+ *
+ * Instead do: (A | B) - (A & B) in order to compute the XOR
+ * of the two function addresses:
+ */
+. = ASSERT(((ABSOLUTE(srso_alias_untrain_ret) | srso_alias_safe_ret) -
+ (ABSOLUTE(srso_alias_untrain_ret) & srso_alias_safe_ret)) == ((1 << 2) | (1 << 8) | (1 << 14) | (1 << 20)),
+ "SRSO function pair won't alias");
#endif
#endif /* CONFIG_X86_32 */
--
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