LOAD 段的对齐不是 2MB 的倍数
Alignment of LOAD segment isn't multiple of 2MB
我已将 c++ 支持（libsupc++ 库）添加到 Linux 内核 4.14.41 并成功编译内核。内核以 32 位配置启动，但对于 64 位配置，黑屏停止并出现以下错误：
early console in extract_kernel
input data: 0x0000000002123276
input_len: 0x00000000000778406
output: 0x0000000001000000
output_len: 0x000000000178b368
kernel_total_size: 0x00000000018ca000
booted via startup_32()
Physical KASLR using RDTSC...
Virtual KASLR using RDTSC...
Decompressing Linux... Parsing ELF...
Alignment of LOAD segment isn't a multiple of 2MB
--System halted
用谷歌搜索错误，但找不到太多帮助。我认为问题出在 startup_32() 上。 64位配置有startup_64()吗？错误的可能原因是什么或如何调试此类错误？
readelf -l vmlinux:
Elf file type is EXEC (Executable file)
Entry point 0x1000000
There are 5 program headers, starting at offset 64
Program Headers:
Type Offset VirtAddr PhysAddr
FileSiz MemSiz Flags Align
LOAD 0x0000000000001000 0xffffffff81000000 0x0000000001000000
0x00000000010f2000 0x00000000010f2000 R E 1000
LOAD 0x00000000010f4000 0xffffffff82200000 0x0000000002200000
0x00000000004a4000 0x00000000004a4000 RW 2000
LOAD 0x0000000001598000 0x0000000000000000 0x00000000026a4000
0x0000000000021998 0x0000000000021998 RW 1000
LOAD 0x00000000015ba000 0xffffffff826c6000 0x00000000026c6000
0x0000000000121000 0x0000000000204000 RWE 2000
NOTE 0x0000000000c0423c 0xffffffff81c0323c 0x0000000001c0323c
0x0000000000000024 0x0000000000000024 4
Section to Segment mapping:
Segment Sections...
00 .text .discard.text .text._Z6abort3v .text._ZNK10__cxxabiv117__pbase_type_info15__pointer_catchEPKS0_PPvj .notes __ex_table .rodata .eh_frame .gcc_except_table .pci_fixup .tracedata __ksymtab __ksymtab_gpl __ksymtab_strings __param __modver
01 .data .exitcall.exit .discard.func_stack_frame_non_standard .jcr __bug_table .orc_unwind_ip .orc_unwind .orc_lookup .vvar
02 .data..percpu
03 .init.text .init.data .x86_cpu_dev.init .altinstructions .altinstr_replacement .iommu_table .apicdrivers .exit.text .exit.data .smp_locks .data_nosave .bss .brk
04 .notes
readelf -S vmlinux:
There are 97 section headers, starting at offset 0x2c1d430:
Section Headers:
[Nr] Name Type Address Offset
Size EntSize Flags Link Info Align
[ 0] NULL 0000000000000000 00000000
0000000000000000 0000000000000000 0 0 0
[ 1] .text PROGBITS ffffffff81000000 00001000
0000000000c031d1 0000000000000000 AX 0 0 4096
[ 2] .rela.text RELA 0000000000000000 01b52460
000000000053c8f8 0000000000000018 I 95 1 8
[ 3] .discard.text PROGBITS ffffffff81c031e0 00c041e0
0000000000000011 0000000000000000 AX 0 0 16
[ 4] .text._Z6abort3v PROGBITS ffffffff81c03200 00c04200
0000000000000016 0000000000000000 AX 0 0 16
[ 5] .rela.text._Z6abo RELA 0000000000000000 0208ed58
0000000000000030 0000000000000018 I 95 4 8
[ 6] .text._ZNK10__cxx PROGBITS ffffffff81c03220 00c04220
000000000000001c 0000000000000000 AX 0 0 16
[ 7] .notes NOTE ffffffff81c0323c 00c0423c
0000000000000024 0000000000000000 A 0 0 4
[ 8] __ex_table PROGBITS ffffffff81c03260 00c04260
0000000000006f60 0000000000000000 A 0 0 4
[ 9] .rela__ex_table RELA 0000000000000000 0208ed88
0000000000029c40 0000000000000018 I 95 8 8
[10] .rodata PROGBITS ffffffff81e00000 00e01000
0000000000290c32 0000000000000000 WA 0 0 4096
[11] .rela.rodata RELA 0000000000000000 020b89c8
00000000000dd6e8 0000000000000018 I 95 10 8
[12] .eh_frame PROGBITS ffffffff82090c38 01091c38
0000000000001578 0000000000000000 WA 0 0 8
[13] .rela.eh_frame RELA 0000000000000000 021960b0
00000000000014a0 0000000000000018 I 95 12 8
[14] .gcc_except_table PROGBITS ffffffff820921b0 010931b0
0000000000000268 0000000000000000 A 0 0 8
[15] .rela.gcc_except_ RELA 0000000000000000 02197550
0000000000000048 0000000000000018 I 95 14 8
[16] .pci_fixup PROGBITS ffffffff82092418 01093418
0000000000003ba0 0000000000000000 A 0 0 8
[17] .rela.pci_fixup RELA 0000000000000000 02197598
0000000000003ba0 0000000000000018 I 95 16 8
[18] .tracedata PROGBITS ffffffff82095fb8 01096fb8
0000000000000078 0000000000000000 A 0 0 1
[19] .rela.tracedata RELA 0000000000000000 0219b138
0000000000000120 0000000000000018 I 95 18 8
[20] __ksymtab PROGBITS ffffffff82096030 01097030
0000000000015940 0000000000000000 A 0 0 16
[21] .rela__ksymtab RELA 0000000000000000 0219b258
0000000000040bc0 0000000000000018 I 95 20 8
[22] __ksymtab_gpl PROGBITS ffffffff820ab970 010ac970
0000000000011240 0000000000000000 A 0 0 16
[23] .rela__ksymtab_gp RELA 0000000000000000 021dbe18
00000000000336c0 0000000000000018 I 95 22 8
[24] __ksymtab_strings PROGBITS ffffffff820bcbb0 010bdbb0
000000000002fd25 0000000000000000 A 0 0 1
[25] __param PROGBITS ffffffff820ec8d8 010ed8d8
0000000000004808 0000000000000000 A 0 0 8
[26] .rela__param RELA 0000000000000000 0220f4d8
0000000000008118 0000000000000018 I 95 25 8
[27] __modver PROGBITS ffffffff820f10e0 010f20e0
0000000000000f20 0000000000000000 A 0 0 8
[28] .rela__modver RELA 0000000000000000 022175f0
00000000000001c8 0000000000000018 I 95 27 8
[29] .data PROGBITS ffffffff82200000 010f4000
000000000013c800 0000000000000000 WA 0 0 8192
[30] .rela.data RELA 0000000000000000 022177b8
00000000000a7688 0000000000000018 I 95 29 8
[31] .exitcall.exit PROGBITS ffffffff8233c800 01230800
0000000000000b38 0000000000000000 WA 0 0 8
[32] .rela.exitcall.ex RELA 0000000000000000 022bee40
00000000000021a8 0000000000000018 I 95 31 8
[33] .discard.func_sta PROGBITS ffffffff8233d338 01231338
0000000000000028 0000000000000000 WA 0 0 8
[34] .rela.discard.fun RELA 0000000000000000 022c0fe8
0000000000000078 0000000000000018 I 95 33 8
[35] .jcr PROGBITS ffffffff8233d360 01231360
0000000000000000 0000000000000000 WA 0 0 8
[36] __bug_table PROGBITS ffffffff8233d360 01231360
0000000000015f60 0000000000000000 WA 0 0 1
[37] .rela__bug_table RELA 0000000000000000 022c1060
0000000000057d80 0000000000000018 I 95 36 8
[38] .orc_unwind_ip PROGBITS ffffffff823532c0 012472c0
000000000013f9b4 0000000000000000 A 0 0 1
[39] .rela.orc_unwind_ RELA 0000000000000000 02318de0
000000000077da38 0000000000000018 I 95 38 8
[40] .orc_unwind PROGBITS ffffffff82492c74 01386c74
00000000001df68e 0000000000000000 A 0 0 1
[41] .orc_lookup NOBITS ffffffff82672304 01566302
00000000000300cc 0000000000000000 WA 0 0 1
[42] .vvar PROGBITS ffffffff826a3000 01597000
0000000000001000 0000000000000000 WA 0 0 16
[43] .data..percpu PROGBITS 0000000000000000 01598000
0000000000021998 0000000000000000 WA 0 0 4096
[44] .rela.data..percp RELA 0000000000000000 02a96818
00000000000000f0 0000000000000018 I 95 43 8
[45] .init.text PROGBITS ffffffff826c6000 015ba000
000000000007845e 0000000000000000 AX 0 0 16
[46] .rela.init.text RELA 0000000000000000 02a96908
00000000000b89c8 0000000000000018 I 95 45 8
[47] .init.data PROGBITS ffffffff82740000 01634000
0000000000093288 0000000000000000 WA 0 0 8192
[48] .rela.init.data RELA 0000000000000000 02b4f2d0
000000000001a4c0 0000000000000018 I 95 47 8
[49] .x86_cpu_dev.init PROGBITS ffffffff827d3288 016c7288
0000000000000018 0000000000000000 A 0 0 8
[50] .rela.x86_cpu_dev RELA 0000000000000000 02b69790
0000000000000048 0000000000000018 I 95 49 8
[51] .altinstructions PROGBITS ffffffff827d32a0 016c72a0
00000000000053e4 0000000000000000 A 0 0 1
[52] .rela.altinstruct RELA 0000000000000000 02b697d8
00000000000135c0 0000000000000018 I 95 51 8
[53] .altinstr_replace PROGBITS ffffffff827d8684 016cc684
0000000000001a05 0000000000000000 AX 0 0 1
[54] .rela.altinstr_re RELA 0000000000000000 02b7cd98
0000000000001890 0000000000000018 I 95 53 8
[55] .iommu_table PROGBITS ffffffff827da090 016ce090
00000000000000c8 0000000000000000 A 0 0 8
[56] .rela.iommu_table RELA 0000000000000000 02b7e628
0000000000000150 0000000000000018 I 95 55 8
[57] .apicdrivers PROGBITS ffffffff827da158 016ce158
0000000000000010 0000000000000000 WA 0 0 8
[58] .rela.apicdrivers RELA 0000000000000000 02b7e778
0000000000000030 0000000000000018 I 95 57 8
[59] .exit.text PROGBITS ffffffff827da168 016ce168
0000000000002888 0000000000000000 AX 0 0 1
[60] .rela.exit.text RELA 0000000000000000 02b7e7a8
00000000000072a8 0000000000000018 I 95 59 8
[61] .exit.data PROGBITS ffffffff827dc9f0 016d09f0
0000000000000010 0000000000000000 WA 0 0 8
[62] .smp_locks PROGBITS ffffffff827dd000 016d1000
0000000000009000 0000000000000000 A 0 0 4
[63] .rela.smp_locks RELA 0000000000000000 02b85a50
00000000000324a8 0000000000000018 I 95 62 8
[64] .data_nosave PROGBITS ffffffff827e6000 016da000
0000000000001000 0000000000000000 WA 0 0 4
[65] .bss NOBITS ffffffff827e7000 016db000
00000000000b7000 0000000000000000 WA 0 0 4096
[66] .brk NOBITS ffffffff8289e000 016db000
000000000002c000 0000000000000000 WA 0 0 1
[67] .comment PROGBITS 0000000000000000 016db000
0000000000000011 0000000000000001 MS 0 0 1
[68] .discard.unwind_h PROGBITS 0000000000000000 016db011
0000000000000d18 0000000000000000 0 0 1
[69] .rela.discard.unw RELA 0000000000000000 02bb7ef8
0000000000002748 0000000000000018 I 95 68 8
[70] .discard.retpolin PROGBITS 0000000000000000 016dbd29
0000000000000118 0000000000000000 0 0 1
[71] .rela.discard.ret RELA 0000000000000000 02bba640
0000000000000348 0000000000000018 I 95 70 8
[72] .discard.reachabl PROGBITS 0000000000000000 016dbe41
000000000000752c 0000000000000000 0 0 1
[73] .rela.discard.rea RELA 0000000000000000 02bba988
000000000002bf08 0000000000000018 I 95 72 8
[74] .discard.nospec PROGBITS 0000000000000000 016e336d
0000000000000048 0000000000000000 0 0 1
[75] .rela.discard.nos RELA 0000000000000000 02be6890
00000000000001b0 0000000000000018 I 95 74 8
[76] .discard.unreacha PROGBITS 0000000000000000 016e33b5
0000000000001368 0000000000000000 0 0 1
[77] .rela.discard.unr RELA 0000000000000000 02be6a40
0000000000007470 0000000000000018 I 95 76 8
[78] .debug_aranges PROGBITS 0000000000000000 016e471d
0000000000000490 0000000000000000 0 0 1
[79] .rela.debug_arang RELA 0000000000000000 02bedeb0
0000000000000498 0000000000000018 I 95 78 8
[80] .debug_pubnames PROGBITS 0000000000000000 016e4bad
000000000000159b 0000000000000000 0 0 1
[81] .rela.debug_pubna RELA 0000000000000000 02bee348
0000000000000258 0000000000000018 I 95 80 8
[82] .debug_info PROGBITS 0000000000000000 016e6148
000000000001e582 0000000000000000 0 0 1
[83] .rela.debug_info RELA 0000000000000000 02bee5a0
000000000002c958 0000000000000018 I 95 82 8
[84] .debug_abbrev PROGBITS 0000000000000000 017046ca
0000000000003b4f 0000000000000000 0 0 1
[85] .debug_line PROGBITS 0000000000000000 01708219
0000000000004109 0000000000000000 0 0 1
[86] .rela.debug_line RELA 0000000000000000 02c1aef8
0000000000000258 0000000000000018 I 95 85 8
[87] .debug_frame PROGBITS 0000000000000000 0170c328
0000000000000180 0000000000000000 0 0 8
[88] .rela.debug_frame RELA 0000000000000000 02c1b150
00000000000002d0 0000000000000018 I 95 87 8
[89] .debug_str PROGBITS 0000000000000000 0170c4a8
0000000000004c1a 0000000000000001 MS 0 0 1
[90] .debug_loc PROGBITS 0000000000000000 017110c2
0000000000006fab 0000000000000000 0 0 1
[91] .rela.debug_loc RELA 0000000000000000 02c1b420
00000000000016e0 0000000000000018 I 95 90 8
[92] .debug_ranges PROGBITS 0000000000000000 0171806d
0000000000001970 0000000000000000 0 0 1
[93] .rela.debug_range RELA 0000000000000000 02c1cb00
0000000000000930 0000000000000018 I 95 92 8
[94] .shstrtab STRTAB 0000000000000000 017199dd
00000000000003dd 0000000000000000 0 0 1
[95] .symtab SYMTAB 0000000000000000 01719dc0
0000000000230f28 0000000000000018 96 71830 8
[96] .strtab STRTAB 0000000000000000 0194ace8
0000000000207772 0000000000000000 0 0 1
Key to Flags:
W (write), A (alloc), X (execute), M (merge), S (strings), l (large)
I (info), L (link order), G (group), T (TLS), E (exclude), x (unknown)
O (extra OS processing required) o (OS specific), p (processor specific)
未对齐是因为我传递给链接器的错误标志 ld。实际上 -z max-page-size=0x200000 选项被传递给源代码树的 arch/x86/Makefile 中的链接器，以强制链接使用 2MB 页面大小。但是在顶层Makefile，我使用链接器作为LD = $(CROSS_COMPILE)ld -nostdlib -nodefaultlibs -nostartfiles which I thought that were required for adding C++ support. Upon removing thenodefaultlibsandnostartfilesflags, the load segments got properly aligned to 2MB.
我已将 c++ 支持（libsupc++ 库）添加到 Linux 内核 4.14.41 并成功编译内核。内核以 32 位配置启动，但对于 64 位配置，黑屏停止并出现以下错误：
early console in extract_kernel
input data: 0x0000000002123276
input_len: 0x00000000000778406
output: 0x0000000001000000
output_len: 0x000000000178b368
kernel_total_size: 0x00000000018ca000
booted via startup_32()
Physical KASLR using RDTSC...
Virtual KASLR using RDTSC...
Decompressing Linux... Parsing ELF...
Alignment of LOAD segment isn't a multiple of 2MB
--System halted
用谷歌搜索错误，但找不到太多帮助。我认为问题出在 startup_32() 上。 64位配置有startup_64()吗？错误的可能原因是什么或如何调试此类错误？
readelf -l vmlinux:
Elf file type is EXEC (Executable file)
Entry point 0x1000000
There are 5 program headers, starting at offset 64
Program Headers:
Type Offset VirtAddr PhysAddr
FileSiz MemSiz Flags Align
LOAD 0x0000000000001000 0xffffffff81000000 0x0000000001000000
0x00000000010f2000 0x00000000010f2000 R E 1000
LOAD 0x00000000010f4000 0xffffffff82200000 0x0000000002200000
0x00000000004a4000 0x00000000004a4000 RW 2000
LOAD 0x0000000001598000 0x0000000000000000 0x00000000026a4000
0x0000000000021998 0x0000000000021998 RW 1000
LOAD 0x00000000015ba000 0xffffffff826c6000 0x00000000026c6000
0x0000000000121000 0x0000000000204000 RWE 2000
NOTE 0x0000000000c0423c 0xffffffff81c0323c 0x0000000001c0323c
0x0000000000000024 0x0000000000000024 4
Section to Segment mapping:
Segment Sections...
00 .text .discard.text .text._Z6abort3v .text._ZNK10__cxxabiv117__pbase_type_info15__pointer_catchEPKS0_PPvj .notes __ex_table .rodata .eh_frame .gcc_except_table .pci_fixup .tracedata __ksymtab __ksymtab_gpl __ksymtab_strings __param __modver
01 .data .exitcall.exit .discard.func_stack_frame_non_standard .jcr __bug_table .orc_unwind_ip .orc_unwind .orc_lookup .vvar
02 .data..percpu
03 .init.text .init.data .x86_cpu_dev.init .altinstructions .altinstr_replacement .iommu_table .apicdrivers .exit.text .exit.data .smp_locks .data_nosave .bss .brk
04 .notes
readelf -S vmlinux:
There are 97 section headers, starting at offset 0x2c1d430:
Section Headers:
[Nr] Name Type Address Offset
Size EntSize Flags Link Info Align
[ 0] NULL 0000000000000000 00000000
0000000000000000 0000000000000000 0 0 0
[ 1] .text PROGBITS ffffffff81000000 00001000
0000000000c031d1 0000000000000000 AX 0 0 4096
[ 2] .rela.text RELA 0000000000000000 01b52460
000000000053c8f8 0000000000000018 I 95 1 8
[ 3] .discard.text PROGBITS ffffffff81c031e0 00c041e0
0000000000000011 0000000000000000 AX 0 0 16
[ 4] .text._Z6abort3v PROGBITS ffffffff81c03200 00c04200
0000000000000016 0000000000000000 AX 0 0 16
[ 5] .rela.text._Z6abo RELA 0000000000000000 0208ed58
0000000000000030 0000000000000018 I 95 4 8
[ 6] .text._ZNK10__cxx PROGBITS ffffffff81c03220 00c04220
000000000000001c 0000000000000000 AX 0 0 16
[ 7] .notes NOTE ffffffff81c0323c 00c0423c
0000000000000024 0000000000000000 A 0 0 4
[ 8] __ex_table PROGBITS ffffffff81c03260 00c04260
0000000000006f60 0000000000000000 A 0 0 4
[ 9] .rela__ex_table RELA 0000000000000000 0208ed88
0000000000029c40 0000000000000018 I 95 8 8
[10] .rodata PROGBITS ffffffff81e00000 00e01000
0000000000290c32 0000000000000000 WA 0 0 4096
[11] .rela.rodata RELA 0000000000000000 020b89c8
00000000000dd6e8 0000000000000018 I 95 10 8
[12] .eh_frame PROGBITS ffffffff82090c38 01091c38
0000000000001578 0000000000000000 WA 0 0 8
[13] .rela.eh_frame RELA 0000000000000000 021960b0
00000000000014a0 0000000000000018 I 95 12 8
[14] .gcc_except_table PROGBITS ffffffff820921b0 010931b0
0000000000000268 0000000000000000 A 0 0 8
[15] .rela.gcc_except_ RELA 0000000000000000 02197550
0000000000000048 0000000000000018 I 95 14 8
[16] .pci_fixup PROGBITS ffffffff82092418 01093418
0000000000003ba0 0000000000000000 A 0 0 8
[17] .rela.pci_fixup RELA 0000000000000000 02197598
0000000000003ba0 0000000000000018 I 95 16 8
[18] .tracedata PROGBITS ffffffff82095fb8 01096fb8
0000000000000078 0000000000000000 A 0 0 1
[19] .rela.tracedata RELA 0000000000000000 0219b138
0000000000000120 0000000000000018 I 95 18 8
[20] __ksymtab PROGBITS ffffffff82096030 01097030
0000000000015940 0000000000000000 A 0 0 16
[21] .rela__ksymtab RELA 0000000000000000 0219b258
0000000000040bc0 0000000000000018 I 95 20 8
[22] __ksymtab_gpl PROGBITS ffffffff820ab970 010ac970
0000000000011240 0000000000000000 A 0 0 16
[23] .rela__ksymtab_gp RELA 0000000000000000 021dbe18
00000000000336c0 0000000000000018 I 95 22 8
[24] __ksymtab_strings PROGBITS ffffffff820bcbb0 010bdbb0
000000000002fd25 0000000000000000 A 0 0 1
[25] __param PROGBITS ffffffff820ec8d8 010ed8d8
0000000000004808 0000000000000000 A 0 0 8
[26] .rela__param RELA 0000000000000000 0220f4d8
0000000000008118 0000000000000018 I 95 25 8
[27] __modver PROGBITS ffffffff820f10e0 010f20e0
0000000000000f20 0000000000000000 A 0 0 8
[28] .rela__modver RELA 0000000000000000 022175f0
00000000000001c8 0000000000000018 I 95 27 8
[29] .data PROGBITS ffffffff82200000 010f4000
000000000013c800 0000000000000000 WA 0 0 8192
[30] .rela.data RELA 0000000000000000 022177b8
00000000000a7688 0000000000000018 I 95 29 8
[31] .exitcall.exit PROGBITS ffffffff8233c800 01230800
0000000000000b38 0000000000000000 WA 0 0 8
[32] .rela.exitcall.ex RELA 0000000000000000 022bee40
00000000000021a8 0000000000000018 I 95 31 8
[33] .discard.func_sta PROGBITS ffffffff8233d338 01231338
0000000000000028 0000000000000000 WA 0 0 8
[34] .rela.discard.fun RELA 0000000000000000 022c0fe8
0000000000000078 0000000000000018 I 95 33 8
[35] .jcr PROGBITS ffffffff8233d360 01231360
0000000000000000 0000000000000000 WA 0 0 8
[36] __bug_table PROGBITS ffffffff8233d360 01231360
0000000000015f60 0000000000000000 WA 0 0 1
[37] .rela__bug_table RELA 0000000000000000 022c1060
0000000000057d80 0000000000000018 I 95 36 8
[38] .orc_unwind_ip PROGBITS ffffffff823532c0 012472c0
000000000013f9b4 0000000000000000 A 0 0 1
[39] .rela.orc_unwind_ RELA 0000000000000000 02318de0
000000000077da38 0000000000000018 I 95 38 8
[40] .orc_unwind PROGBITS ffffffff82492c74 01386c74
00000000001df68e 0000000000000000 A 0 0 1
[41] .orc_lookup NOBITS ffffffff82672304 01566302
00000000000300cc 0000000000000000 WA 0 0 1
[42] .vvar PROGBITS ffffffff826a3000 01597000
0000000000001000 0000000000000000 WA 0 0 16
[43] .data..percpu PROGBITS 0000000000000000 01598000
0000000000021998 0000000000000000 WA 0 0 4096
[44] .rela.data..percp RELA 0000000000000000 02a96818
00000000000000f0 0000000000000018 I 95 43 8
[45] .init.text PROGBITS ffffffff826c6000 015ba000
000000000007845e 0000000000000000 AX 0 0 16
[46] .rela.init.text RELA 0000000000000000 02a96908
00000000000b89c8 0000000000000018 I 95 45 8
[47] .init.data PROGBITS ffffffff82740000 01634000
0000000000093288 0000000000000000 WA 0 0 8192
[48] .rela.init.data RELA 0000000000000000 02b4f2d0
000000000001a4c0 0000000000000018 I 95 47 8
[49] .x86_cpu_dev.init PROGBITS ffffffff827d3288 016c7288
0000000000000018 0000000000000000 A 0 0 8
[50] .rela.x86_cpu_dev RELA 0000000000000000 02b69790
0000000000000048 0000000000000018 I 95 49 8
[51] .altinstructions PROGBITS ffffffff827d32a0 016c72a0
00000000000053e4 0000000000000000 A 0 0 1
[52] .rela.altinstruct RELA 0000000000000000 02b697d8
00000000000135c0 0000000000000018 I 95 51 8
[53] .altinstr_replace PROGBITS ffffffff827d8684 016cc684
0000000000001a05 0000000000000000 AX 0 0 1
[54] .rela.altinstr_re RELA 0000000000000000 02b7cd98
0000000000001890 0000000000000018 I 95 53 8
[55] .iommu_table PROGBITS ffffffff827da090 016ce090
00000000000000c8 0000000000000000 A 0 0 8
[56] .rela.iommu_table RELA 0000000000000000 02b7e628
0000000000000150 0000000000000018 I 95 55 8
[57] .apicdrivers PROGBITS ffffffff827da158 016ce158
0000000000000010 0000000000000000 WA 0 0 8
[58] .rela.apicdrivers RELA 0000000000000000 02b7e778
0000000000000030 0000000000000018 I 95 57 8
[59] .exit.text PROGBITS ffffffff827da168 016ce168
0000000000002888 0000000000000000 AX 0 0 1
[60] .rela.exit.text RELA 0000000000000000 02b7e7a8
00000000000072a8 0000000000000018 I 95 59 8
[61] .exit.data PROGBITS ffffffff827dc9f0 016d09f0
0000000000000010 0000000000000000 WA 0 0 8
[62] .smp_locks PROGBITS ffffffff827dd000 016d1000
0000000000009000 0000000000000000 A 0 0 4
[63] .rela.smp_locks RELA 0000000000000000 02b85a50
00000000000324a8 0000000000000018 I 95 62 8
[64] .data_nosave PROGBITS ffffffff827e6000 016da000
0000000000001000 0000000000000000 WA 0 0 4
[65] .bss NOBITS ffffffff827e7000 016db000
00000000000b7000 0000000000000000 WA 0 0 4096
[66] .brk NOBITS ffffffff8289e000 016db000
000000000002c000 0000000000000000 WA 0 0 1
[67] .comment PROGBITS 0000000000000000 016db000
0000000000000011 0000000000000001 MS 0 0 1
[68] .discard.unwind_h PROGBITS 0000000000000000 016db011
0000000000000d18 0000000000000000 0 0 1
[69] .rela.discard.unw RELA 0000000000000000 02bb7ef8
0000000000002748 0000000000000018 I 95 68 8
[70] .discard.retpolin PROGBITS 0000000000000000 016dbd29
0000000000000118 0000000000000000 0 0 1
[71] .rela.discard.ret RELA 0000000000000000 02bba640
0000000000000348 0000000000000018 I 95 70 8
[72] .discard.reachabl PROGBITS 0000000000000000 016dbe41
000000000000752c 0000000000000000 0 0 1
[73] .rela.discard.rea RELA 0000000000000000 02bba988
000000000002bf08 0000000000000018 I 95 72 8
[74] .discard.nospec PROGBITS 0000000000000000 016e336d
0000000000000048 0000000000000000 0 0 1
[75] .rela.discard.nos RELA 0000000000000000 02be6890
00000000000001b0 0000000000000018 I 95 74 8
[76] .discard.unreacha PROGBITS 0000000000000000 016e33b5
0000000000001368 0000000000000000 0 0 1
[77] .rela.discard.unr RELA 0000000000000000 02be6a40
0000000000007470 0000000000000018 I 95 76 8
[78] .debug_aranges PROGBITS 0000000000000000 016e471d
0000000000000490 0000000000000000 0 0 1
[79] .rela.debug_arang RELA 0000000000000000 02bedeb0
0000000000000498 0000000000000018 I 95 78 8
[80] .debug_pubnames PROGBITS 0000000000000000 016e4bad
000000000000159b 0000000000000000 0 0 1
[81] .rela.debug_pubna RELA 0000000000000000 02bee348
0000000000000258 0000000000000018 I 95 80 8
[82] .debug_info PROGBITS 0000000000000000 016e6148
000000000001e582 0000000000000000 0 0 1
[83] .rela.debug_info RELA 0000000000000000 02bee5a0
000000000002c958 0000000000000018 I 95 82 8
[84] .debug_abbrev PROGBITS 0000000000000000 017046ca
0000000000003b4f 0000000000000000 0 0 1
[85] .debug_line PROGBITS 0000000000000000 01708219
0000000000004109 0000000000000000 0 0 1
[86] .rela.debug_line RELA 0000000000000000 02c1aef8
0000000000000258 0000000000000018 I 95 85 8
[87] .debug_frame PROGBITS 0000000000000000 0170c328
0000000000000180 0000000000000000 0 0 8
[88] .rela.debug_frame RELA 0000000000000000 02c1b150
00000000000002d0 0000000000000018 I 95 87 8
[89] .debug_str PROGBITS 0000000000000000 0170c4a8
0000000000004c1a 0000000000000001 MS 0 0 1
[90] .debug_loc PROGBITS 0000000000000000 017110c2
0000000000006fab 0000000000000000 0 0 1
[91] .rela.debug_loc RELA 0000000000000000 02c1b420
00000000000016e0 0000000000000018 I 95 90 8
[92] .debug_ranges PROGBITS 0000000000000000 0171806d
0000000000001970 0000000000000000 0 0 1
[93] .rela.debug_range RELA 0000000000000000 02c1cb00
0000000000000930 0000000000000018 I 95 92 8
[94] .shstrtab STRTAB 0000000000000000 017199dd
00000000000003dd 0000000000000000 0 0 1
[95] .symtab SYMTAB 0000000000000000 01719dc0
0000000000230f28 0000000000000018 96 71830 8
[96] .strtab STRTAB 0000000000000000 0194ace8
0000000000207772 0000000000000000 0 0 1
Key to Flags:
W (write), A (alloc), X (execute), M (merge), S (strings), l (large)
I (info), L (link order), G (group), T (TLS), E (exclude), x (unknown)
O (extra OS processing required) o (OS specific), p (processor specific)
未对齐是因为我传递给链接器的错误标志 ld。实际上 -z max-page-size=0x200000 选项被传递给源代码树的 arch/x86/Makefile 中的链接器，以强制链接使用 2MB 页面大小。但是在顶层Makefile，我使用链接器作为LD = $(CROSS_COMPILE)ld -nostdlib -nodefaultlibs -nostartfiles which I thought that were required for adding C++ support. Upon removing thenodefaultlibsandnostartfilesflags, the load segments got properly aligned to 2MB.