From f9004dbfff8a3fbbd7e2a88c8a4327c7f2f8e5b2 Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Wed, 31 Jan 2024 01:04:47 +0000
Subject: [PATCH] add driver 5G
---
kernel/include/asm-generic/vmlinux.lds.h | 302 ++++++++++++++++++++++++++++++++++++++++++--------
1 files changed, 253 insertions(+), 49 deletions(-)
diff --git a/kernel/include/asm-generic/vmlinux.lds.h b/kernel/include/asm-generic/vmlinux.lds.h
index 5ea5a1d..64d9da1 100644
--- a/kernel/include/asm-generic/vmlinux.lds.h
+++ b/kernel/include/asm-generic/vmlinux.lds.h
@@ -23,18 +23,18 @@
* _etext = .;
*
* _sdata = .;
- * RO_DATA_SECTION(PAGE_SIZE)
- * RW_DATA_SECTION(...)
+ * RO_DATA(PAGE_SIZE)
+ * RW_DATA(...)
* _edata = .;
*
* EXCEPTION_TABLE(...)
- * NOTES
*
* BSS_SECTION(0, 0, 0)
* _end = .;
*
* STABS_DEBUG
* DWARF_DEBUG
+ * ELF_DETAILS
*
* DISCARDS // must be the last
* }
@@ -54,6 +54,33 @@
#define LOAD_OFFSET 0
#endif
+/*
+ * Only some architectures want to have the .notes segment visible in
+ * a separate PT_NOTE ELF Program Header. When this happens, it needs
+ * to be visible in both the kernel text's PT_LOAD and the PT_NOTE
+ * Program Headers. In this case, though, the PT_LOAD needs to be made
+ * the default again so that all the following sections don't also end
+ * up in the PT_NOTE Program Header.
+ */
+#ifdef EMITS_PT_NOTE
+#define NOTES_HEADERS :text :note
+#define NOTES_HEADERS_RESTORE __restore_ph : { *(.__restore_ph) } :text
+#else
+#define NOTES_HEADERS
+#define NOTES_HEADERS_RESTORE
+#endif
+
+/*
+ * Some architectures have non-executable read-only exception tables.
+ * They can be added to the RO_DATA segment by specifying their desired
+ * alignment.
+ */
+#ifdef RO_EXCEPTION_TABLE_ALIGN
+#define RO_EXCEPTION_TABLE EXCEPTION_TABLE(RO_EXCEPTION_TABLE_ALIGN)
+#else
+#define RO_EXCEPTION_TABLE
+#endif
+
/* Align . to a 8 byte boundary equals to maximum function alignment. */
#define ALIGN_FUNCTION() . = ALIGN(8)
@@ -63,12 +90,14 @@
* .data. We don't want to pull in .data..other sections, which Linux
* has defined. Same for text and bss.
*
+ * With LTO_CLANG, the linker also splits sections by default, so we need
+ * these macros to combine the sections during the final link.
+ *
* RODATA_MAIN is not used because existing code already defines .rodata.x
* sections to be brought in with rodata.
*/
#if defined(CONFIG_LD_DEAD_CODE_DATA_ELIMINATION) || defined(CONFIG_LTO_CLANG)
#define TEXT_MAIN .text .text.[0-9a-zA-Z_]*
-#define TEXT_CFI_MAIN .text.[0-9a-zA-Z_]*.cfi
#define DATA_MAIN .data .data.[0-9a-zA-Z_]* .data..L* .data..compoundliteral*
#define SDATA_MAIN .sdata .sdata.[0-9a-zA-Z_]*
#define RODATA_MAIN .rodata .rodata.[0-9a-zA-Z_]* .rodata..L*
@@ -76,7 +105,6 @@
#define SBSS_MAIN .sbss .sbss.[0-9a-zA-Z_]*
#else
#define TEXT_MAIN .text
-#define TEXT_CFI_MAIN .text.cfi
#define DATA_MAIN .data
#define SDATA_MAIN .sdata
#define RODATA_MAIN .rodata
@@ -85,11 +113,30 @@
#endif
/*
- * Align to a 32 byte boundary equal to the
- * alignment gcc 4.5 uses for a struct
+ * GCC 4.5 and later have a 32 bytes section alignment for structures.
+ * Except GCC 4.9, that feels the need to align on 64 bytes.
*/
+#if __GNUC__ == 4 && __GNUC_MINOR__ == 9
+#define STRUCT_ALIGNMENT 64
+#else
#define STRUCT_ALIGNMENT 32
+#endif
#define STRUCT_ALIGN() . = ALIGN(STRUCT_ALIGNMENT)
+
+/*
+ * The order of the sched class addresses are important, as they are
+ * used to determine the order of the priority of each sched class in
+ * relation to each other.
+ */
+#define SCHED_DATA \
+ STRUCT_ALIGN(); \
+ __begin_sched_classes = .; \
+ *(__idle_sched_class) \
+ *(__fair_sched_class) \
+ *(__rt_sched_class) \
+ *(__dl_sched_class) \
+ *(__stop_sched_class) \
+ __end_sched_classes = .;
/* The actual configuration determine if the init/exit sections
* are handled as text/data or they can be discarded (which
@@ -112,12 +159,28 @@
#endif
#ifdef CONFIG_FTRACE_MCOUNT_RECORD
+/*
+ * The ftrace call sites are logged to a section whose name depends on the
+ * compiler option used. A given kernel image will only use one, AKA
+ * FTRACE_CALLSITE_SECTION. We capture all of them here to avoid header
+ * dependencies for FTRACE_CALLSITE_SECTION's definition.
+ *
+ * Need to also make ftrace_stub_graph point to ftrace_stub
+ * so that the same stub location may have different protocols
+ * and not mess up with C verifiers.
+ */
#define MCOUNT_REC() . = ALIGN(8); \
__start_mcount_loc = .; \
KEEP(*(__mcount_loc)) \
- __stop_mcount_loc = .;
+ KEEP(*(__patchable_function_entries)) \
+ __stop_mcount_loc = .; \
+ ftrace_stub_graph = ftrace_stub;
#else
-#define MCOUNT_REC()
+# ifdef CONFIG_FUNCTION_TRACER
+# define MCOUNT_REC() ftrace_stub_graph = ftrace_stub;
+# else
+# define MCOUNT_REC()
+# endif
#endif
#ifdef CONFIG_TRACE_BRANCH_PROFILING
@@ -205,6 +268,20 @@
#define EARLYCON_TABLE()
#endif
+#ifdef CONFIG_SECURITY
+#define LSM_TABLE() . = ALIGN(8); \
+ __start_lsm_info = .; \
+ KEEP(*(.lsm_info.init)) \
+ __end_lsm_info = .;
+#define EARLY_LSM_TABLE() . = ALIGN(8); \
+ __start_early_lsm_info = .; \
+ KEEP(*(.early_lsm_info.init)) \
+ __end_early_lsm_info = .;
+#else
+#define LSM_TABLE()
+#define EARLY_LSM_TABLE()
+#endif
+
#define ___OF_TABLE(cfg, name) _OF_TABLE_##cfg(name)
#define __OF_TABLE(cfg, name) ___OF_TABLE(cfg, name)
#define OF_TABLE(cfg, name) __OF_TABLE(IS_ENABLED(cfg), name)
@@ -232,6 +309,26 @@
#define ACPI_PROBE_TABLE(name)
#endif
+#ifdef CONFIG_THERMAL
+#define THERMAL_TABLE(name) \
+ . = ALIGN(8); \
+ __##name##_thermal_table = .; \
+ KEEP(*(__##name##_thermal_table)) \
+ __##name##_thermal_table_end = .;
+#else
+#define THERMAL_TABLE(name)
+#endif
+
+#ifdef CONFIG_DTPM
+#define DTPM_TABLE() \
+ . = ALIGN(8); \
+ __dtpm_table = .; \
+ KEEP(*(__dtpm_table)) \
+ __dtpm_table_end = .;
+#else
+#define DTPM_TABLE()
+#endif
+
#define KERNEL_DTB() \
STRUCT_ALIGN(); \
__dtb_start = .; \
@@ -244,6 +341,7 @@
#define DATA_DATA \
*(.xiptext) \
*(DATA_MAIN) \
+ *(.data..decrypted) \
*(.ref.data) \
*(.data..shared_aligned) /* percpu related */ \
MEM_KEEP(init.data*) \
@@ -255,14 +353,10 @@
STRUCT_ALIGN(); \
*(__tracepoints) \
/* implement dynamic printk debug */ \
- . = ALIGN(8); \
- __start___jump_table = .; \
- KEEP(*(__jump_table)) \
- __stop___jump_table = .; \
. = ALIGN(8); \
- __start___verbose = .; \
- KEEP(*(__verbose)) \
- __stop___verbose = .; \
+ __start___dyndbg = .; \
+ KEEP(*(__dyndbg)) \
+ __stop___dyndbg = .; \
LIKELY_PROFILE() \
BRANCH_PROFILE() \
TRACE_PRINTKS() \
@@ -303,6 +397,21 @@
. = __start_init_task + THREAD_SIZE; \
__end_init_task = .;
+#define JUMP_TABLE_DATA \
+ . = ALIGN(8); \
+ __start___jump_table = .; \
+ KEEP(*(__jump_table)) \
+ __stop___jump_table = .;
+
+#define STATIC_CALL_DATA \
+ . = ALIGN(8); \
+ __start_static_call_sites = .; \
+ KEEP(*(.static_call_sites)) \
+ __stop_static_call_sites = .; \
+ __start_static_call_tramp_key = .; \
+ KEEP(*(.static_call_tramp_key)) \
+ __stop_static_call_tramp_key = .;
+
/*
* Allow architectures to handle ro_after_init data on their
* own by defining an empty RO_AFTER_INIT_DATA.
@@ -312,19 +421,21 @@
. = ALIGN(8); \
__start_ro_after_init = .; \
*(.data..ro_after_init) \
+ JUMP_TABLE_DATA \
+ STATIC_CALL_DATA \
__end_ro_after_init = .;
#endif
/*
* Read only Data
*/
-#define RO_DATA_SECTION(align) \
+#define RO_DATA(align) \
. = ALIGN((align)); \
.rodata : AT(ADDR(.rodata) - LOAD_OFFSET) { \
__start_rodata = .; \
*(.rodata) *(.rodata.*) \
+ SCHED_DATA \
RO_AFTER_INIT_DATA /* Read only after init */ \
- KEEP(*(__vermagic)) /* Kernel version magic */ \
. = ALIGN(8); \
__start___tracepoints_ptrs = .; \
KEEP(*(__tracepoints_ptrs)) /* Tracepoints: pointer array */ \
@@ -467,22 +578,30 @@
__start___modver = .; \
KEEP(*(__modver)) \
__stop___modver = .; \
- . = ALIGN((align)); \
- __end_rodata = .; \
} \
- . = ALIGN((align));
+ \
+ RO_EXCEPTION_TABLE \
+ NOTES \
+ BTF \
+ \
+ . = ALIGN((align)); \
+ __end_rodata = .;
-/* RODATA & RO_DATA provided for backward compatibility.
- * All archs are supposed to use RO_DATA() */
-#define RODATA RO_DATA_SECTION(4096)
-#define RO_DATA(align) RO_DATA_SECTION(align)
-#define SECURITY_INIT \
- .security_initcall.init : AT(ADDR(.security_initcall.init) - LOAD_OFFSET) { \
- __security_initcall_start = .; \
- KEEP(*(.security_initcall.init)) \
- __security_initcall_end = .; \
- }
+/*
+ * .text..L.cfi.jumptable.* contain Control-Flow Integrity (CFI)
+ * jump table entries.
+ */
+#ifdef CONFIG_CFI_CLANG
+#define TEXT_CFI_JT \
+ . = ALIGN(PMD_SIZE); \
+ __cfi_jt_start = .; \
+ *(.text..L.cfi.jumptable .text..L.cfi.jumptable.*) \
+ . = ALIGN(PMD_SIZE); \
+ __cfi_jt_end = .;
+#else
+#define TEXT_CFI_JT
+#endif
/*
* Non-instrumentable text section
@@ -507,12 +626,11 @@
*(TEXT_MAIN .text.fixup) \
*(.text.unlikely .text.unlikely.*) \
*(.text.unknown .text.unknown.*) \
- *(TEXT_CFI_MAIN) \
NOINSTR_TEXT \
*(.text..refcount) \
- *(.text..ftrace) \
*(.ref.text) \
*(.text.asan.* .text.tsan.*) \
+ TEXT_CFI_JT \
MEM_KEEP(init.text*) \
MEM_KEEP(exit.text*) \
@@ -563,6 +681,12 @@
*(.softirqentry.text) \
__softirqentry_text_end = .;
+#define STATIC_CALL_TEXT \
+ ALIGN_FUNCTION(); \
+ __static_call_text_start = .; \
+ *(.static_call.text) \
+ __static_call_text_end = .;
+
/* Section used for early init (in .S files) */
#define HEAD_TEXT KEEP(*(.head.text))
@@ -583,6 +707,24 @@
}
/*
+ * .BTF
+ */
+#ifdef CONFIG_DEBUG_INFO_BTF
+#define BTF \
+ .BTF : AT(ADDR(.BTF) - LOAD_OFFSET) { \
+ __start_BTF = .; \
+ KEEP(*(.BTF)) \
+ __stop_BTF = .; \
+ } \
+ . = ALIGN(4); \
+ .BTF_ids : AT(ADDR(.BTF_ids) - LOAD_OFFSET) { \
+ *(.BTF_ids) \
+ }
+#else
+#define BTF
+#endif
+
+/*
* Init task
*/
#define INIT_TASK_DATA_SECTION(align) \
@@ -594,6 +736,7 @@
#ifdef CONFIG_CONSTRUCTORS
#define KERNEL_CTORS() . = ALIGN(8); \
__ctors_start = .; \
+ KEEP(*(SORT(.ctors.*))) \
KEEP(*(.ctors)) \
KEEP(*(SORT(.init_array.*))) \
KEEP(*(.init_array)) \
@@ -624,7 +767,12 @@
IRQCHIP_OF_MATCH_TABLE() \
ACPI_PROBE_TABLE(irqchip) \
ACPI_PROBE_TABLE(timer) \
- EARLYCON_TABLE()
+ THERMAL_TABLE(governor) \
+ DTPM_TABLE() \
+ EARLYCON_TABLE() \
+ LSM_TABLE() \
+ EARLY_LSM_TABLE() \
+ KUNIT_TABLE()
#define INIT_TEXT \
*(.init.text .init.text.*) \
@@ -679,11 +827,21 @@
}
/*
+ * Keep .eh_frame with CFI.
+ */
+#ifdef CONFIG_CFI_CLANG
+#define EH_FRAME .eh_frame : { *(.eh_frame) }
+#else
+#define EH_FRAME
+#endif
+
+/*
* DWARF debug sections.
* Symbols in the DWARF debugging sections are relative to
* the beginning of the section so we begin them at 0.
*/
#define DWARF_DEBUG \
+ EH_FRAME \
/* DWARF 1 */ \
.debug 0 : { *(.debug) } \
.line 0 : { *(.line) } \
@@ -724,15 +882,21 @@
.debug_rnglists 0 : { *(.debug_rnglists) } \
.debug_str_offsets 0 : { *(.debug_str_offsets) }
- /* Stabs debugging sections. */
+/* Stabs debugging sections. */
#define STABS_DEBUG \
.stab 0 : { *(.stab) } \
.stabstr 0 : { *(.stabstr) } \
.stab.excl 0 : { *(.stab.excl) } \
.stab.exclstr 0 : { *(.stab.exclstr) } \
.stab.index 0 : { *(.stab.index) } \
- .stab.indexstr 0 : { *(.stab.indexstr) } \
- .comment 0 : { *(.comment) }
+ .stab.indexstr 0 : { *(.stab.indexstr) }
+
+/* Required sections not related to debugging. */
+#define ELF_DETAILS \
+ .comment 0 : { *(.comment) } \
+ .symtab 0 : { *(.symtab) } \
+ .strtab 0 : { *(.strtab) } \
+ .shstrtab 0 : { *(.shstrtab) }
#ifdef CONFIG_GENERIC_BUG
#define BUG_TABLE \
@@ -783,12 +947,18 @@
#define TRACEDATA
#endif
+/*
+ * Discard .note.GNU-stack, which is emitted as PROGBITS by the compiler.
+ * Otherwise, the type of .notes section would become PROGBITS instead of NOTES.
+ */
#define NOTES \
+ /DISCARD/ : { *(.note.GNU-stack) } \
.notes : AT(ADDR(.notes) - LOAD_OFFSET) { \
__start_notes = .; \
KEEP(*(.note.*)) \
__stop_notes = .; \
- }
+ } NOTES_HEADERS \
+ NOTES_HEADERS_RESTORE
#define INIT_SETUP(initsetup_align) \
. = ALIGN(initsetup_align); \
@@ -821,10 +991,12 @@
KEEP(*(.con_initcall.init)) \
__con_initcall_end = .;
-#define SECURITY_INITCALL \
- __security_initcall_start = .; \
- KEEP(*(.security_initcall.init)) \
- __security_initcall_end = .;
+/* Alignment must be consistent with (kunit_suite *) in include/kunit/test.h */
+#define KUNIT_TABLE() \
+ . = ALIGN(8); \
+ __kunit_suites_start = .; \
+ KEEP(*(.kunit_test_suites)) \
+ __kunit_suites_end = .;
#ifdef CONFIG_BLK_DEV_INITRD
#define INIT_RAM_FS \
@@ -848,7 +1020,6 @@
#ifdef CONFIG_AMD_MEM_ENCRYPT
#define PERCPU_DECRYPTED_SECTION \
. = ALIGN(PAGE_SIZE); \
- *(.data..decrypted) \
*(.data..percpu..decrypted) \
. = ALIGN(PAGE_SIZE);
#else
@@ -865,13 +1036,47 @@
* section definitions so that such archs put those in earlier section
* definitions.
*/
-#define DISCARDS \
- /DISCARD/ : { \
+#ifdef RUNTIME_DISCARD_EXIT
+#define EXIT_DISCARDS
+#else
+#define EXIT_DISCARDS \
EXIT_TEXT \
- EXIT_DATA \
- EXIT_CALL \
+ EXIT_DATA
+#endif
+
+/*
+ * Clang's -fprofile-arcs, -fsanitize=kernel-address, and
+ * -fsanitize=thread produce unwanted sections (.eh_frame
+ * and .init_array.*), but CONFIG_CONSTRUCTORS wants to
+ * keep any .init_array.* sections.
+ * https://bugs.llvm.org/show_bug.cgi?id=46478
+ */
+#if defined(CONFIG_GCOV_KERNEL) || defined(CONFIG_KASAN_GENERIC) || defined(CONFIG_KCSAN)
+# ifdef CONFIG_CONSTRUCTORS
+# define SANITIZER_DISCARDS \
+ *(.eh_frame)
+# else
+# define SANITIZER_DISCARDS \
+ *(.init_array) *(.init_array.*) \
+ *(.eh_frame)
+# endif
+#else
+# define SANITIZER_DISCARDS
+#endif
+
+#define COMMON_DISCARDS \
+ SANITIZER_DISCARDS \
*(.discard) \
*(.discard.*) \
+ *(.modinfo) \
+ /* ld.bfd warns about .gnu.version* even when not emitted */ \
+ *(.gnu.version*) \
+
+#define DISCARDS \
+ /DISCARD/ : { \
+ EXIT_DISCARDS \
+ EXIT_CALL \
+ COMMON_DISCARDS \
}
/**
@@ -966,7 +1171,7 @@
* matches the requirement of PAGE_ALIGNED_DATA.
*
* use 0 as page_align if page_aligned data is not used */
-#define RW_DATA_SECTION(cacheline, pagealigned, inittask) \
+#define RW_DATA(cacheline, pagealigned, inittask) \
. = ALIGN(PAGE_SIZE); \
.data : AT(ADDR(.data) - LOAD_OFFSET) { \
INIT_TASK_DATA(inittask) \
@@ -993,7 +1198,6 @@
INIT_SETUP(initsetup_align) \
INIT_CALLS \
CON_INITCALL \
- SECURITY_INITCALL \
INIT_RAM_FS \
}
--
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