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comparison src/kernel.ld @ 0:83c23a36980d

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author Tatsuki IHA <e125716@ie.u-ryukyu.ac.jp>
date Fri, 26 May 2017 23:11:05 +0900
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-1:000000000000 0:83c23a36980d
1 OUTPUT_FORMAT("elf32-littlearm")
2 OUTPUT_ARCH(arm)
3 ENTRY(_start)
4
5 ENTRY_SVC_STACK_SIZE = 0x1000;
6
7 SECTIONS
8 {
9 /* the entry point, before enabling paging. The code to enable paing
10 needs to have the same virtual/physical address. entry.S and start.c
11 run in this initial setting.*/
12 . = 0x10000;
13 .start_sec : {
14 build/entry.o(.text)
15 build/start.o(.text .text.*)
16
17 build/entry.o(.rodata .rodata.*)
18 build/start.o(.rodata .rodata.*)
19
20 build/entry.o(.data .data.*)
21 build/start.o(.data .data.*)
22
23 PROVIDE(edata_entry = .);
24
25 build/entry.o(.bss .bss.* COMMON)
26 build/start.o(.bss .bss.* COMMON)
27
28 /*define a stack for the entry*/
29 . = ALIGN(0x1000);
30 . += ENTRY_SVC_STACK_SIZE;
31
32 PROVIDE (svc_stktop = .);
33
34 /* define the kernel page table, must be 16K and 16K-aligned*/
35 . = ALIGN(0x4000);
36 PROVIDE (_kernel_pgtbl = .);
37 . += 0x4000;
38
39 /* we also need a user page table*/
40 PROVIDE (_user_pgtbl = .);
41 . += 0x1000;
42
43 PROVIDE(end_entry = .);
44 }
45
46 /*the kernel executes at the higher 2GB address space, but loaded
47 at the lower memory (0x20000)*/
48 . = 0x80020000;
49
50 .text : AT(0x20000){
51 *(.text .text.* .gnu.linkonce.t.*)
52 }
53
54 PROVIDE(etext = .); /* Define the 'etext' symbol to this value */
55
56 .rodata : {
57 *(.rodata .rodata.* .gnu.linkonce.r.*)
58 }
59
60 /* aligned the data to a (4K) page, so it can be assigned
61 different protection than the code*/
62 . = ALIGN(0x1000);
63
64 PROVIDE (data_start = .);
65
66 .data : {
67 *(.data .data.*)
68 }
69
70 PROVIDE (edata = .);
71
72 .bss : {
73 *(.bss .bss.* COMMON)
74 }
75
76 . = ALIGN(0x1000);
77 PROVIDE (end = .);
78 }