Selaa lähdekoodia

[i386] Simplify linker script and standardise linker-defined symbol names

Reduce the number of sections within the linker script to match the
number of practical sections within the output file.

Define _section, _msection, _esection, _section_filesz, _section_memsz,
and _section_lma for each section, replacing the mixture of symbols that
previously existed.

In particular, replace _text and _end with _textdata and _etextdata, to
make it explicit within code that uses these symbols that the .text and
.data sections are always treated as a single contiguous block.
tags/v0.9.6
Michael Brown 15 vuotta sitten
vanhempi
commit
13d09e6719

+ 4
- 4
src/arch/i386/core/relocate.c Näytä tiedosto

@@ -18,8 +18,8 @@ extern char _max_align[];
18 18
 #define max_align ( ( unsigned int ) _max_align )
19 19
 
20 20
 /* Linker symbols */
21
-extern char _text[];
22
-extern char _end[];
21
+extern char _textdata[];
22
+extern char _etextdata[];
23 23
 
24 24
 /* within 1MB of 4GB is too close. 
25 25
  * MAX_ADDR is the maximum address we can easily do DMA to.
@@ -47,8 +47,8 @@ __cdecl void relocate ( struct i386_all_regs *ix86 ) {
47 47
 
48 48
 	/* Get memory map and current location */
49 49
 	get_memmap ( &memmap );
50
-	start = virt_to_phys ( _text );
51
-	end = virt_to_phys ( _end );
50
+	start = virt_to_phys ( _textdata );
51
+	end = virt_to_phys ( _etextdata );
52 52
 	size = ( end - start );
53 53
 	padded_size = ( size + max_align - 1 );
54 54
 

+ 2
- 2
src/arch/i386/firmware/pcbios/e820mangler.S Näytä tiedosto

@@ -66,7 +66,7 @@
66 66
 	.align 16
67 67
 	.globl hidemem_base
68 68
 	.globl hidemem_umalloc
69
-	.globl hidemem_text
69
+	.globl hidemem_textdata
70 70
 memory_windows:
71 71
 base_memory_window:	.long 0x00000000, 0x00000000 /* Start of memory */
72 72
 
@@ -76,7 +76,7 @@ ext_memory_window:	.long 0x000a0000, 0x00000000 /* 640kB mark */
76 76
 hidemem_umalloc:	.long 0xffffffff, 0xffffffff /* Changes at runtime */
77 77
 			.long 0xffffffff, 0xffffffff /* Changes at runtime */
78 78
 
79
-hidemem_text:		.long 0xffffffff, 0xffffffff /* Changes at runtime */
79
+hidemem_textdata:	.long 0xffffffff, 0xffffffff /* Changes at runtime */
80 80
 			.long 0xffffffff, 0xffffffff /* Changes at runtime */
81 81
 
82 82
 			.long 0xffffffff, 0xffffffff /* End of memory */

+ 16
- 16
src/arch/i386/firmware/pcbios/hidemem.c Näytä tiedosto

@@ -55,8 +55,8 @@ extern struct hidden_region __data16 ( hidemem_umalloc );
55 55
 #define hidemem_umalloc __use_data16 ( hidemem_umalloc )
56 56
 
57 57
 /** Hidden text memory */
58
-extern struct hidden_region __data16 ( hidemem_text );
59
-#define hidemem_text __use_data16 ( hidemem_text )
58
+extern struct hidden_region __data16 ( hidemem_textdata );
59
+#define hidemem_textdata __use_data16 ( hidemem_textdata )
60 60
 
61 61
 /** Assembly routine in e820mangler.S */
62 62
 extern void int15();
@@ -66,12 +66,12 @@ extern struct segoff __text16 ( int15_vector );
66 66
 #define int15_vector __use_text16 ( int15_vector )
67 67
 
68 68
 /* The linker defines these symbols for us */
69
-extern char _text[];
70
-extern char _end[];
71
-extern char _text16_size[];
72
-#define _text16_size ( ( unsigned int ) _text16_size )
73
-extern char _data16_size[];
74
-#define _data16_size ( ( unsigned int ) _data16_size )
69
+extern char _textdata[];
70
+extern char _etextdata[];
71
+extern char _text16_memsz[];
72
+#define _text16_memsz ( ( unsigned int ) _text16_memsz )
73
+extern char _data16_memsz[];
74
+#define _data16_memsz ( ( unsigned int ) _data16_memsz )
75 75
 
76 76
 /**
77 77
  * Hide region of memory from system memory map
@@ -110,7 +110,7 @@ void hide_basemem ( void ) {
110 110
  *
111 111
  */
112 112
 void hide_umalloc ( physaddr_t start, physaddr_t end ) {
113
-	assert ( end <= virt_to_phys ( _text ) );
113
+	assert ( end <= virt_to_phys ( _textdata ) );
114 114
 	hide_region ( &hidemem_umalloc, start, end );
115 115
 }
116 116
 
@@ -118,9 +118,9 @@ void hide_umalloc ( physaddr_t start, physaddr_t end ) {
118 118
  * Hide .text and .data
119 119
  *
120 120
  */
121
-void hide_text ( void ) {
122
-	hide_region ( &hidemem_text, virt_to_phys ( _text ),
123
-		      virt_to_phys ( _end ) );
121
+void hide_textdata ( void ) {
122
+	hide_region ( &hidemem_textdata, virt_to_phys ( _textdata ),
123
+		      virt_to_phys ( _etextdata ) );
124 124
 }
125 125
 
126 126
 /**
@@ -148,8 +148,8 @@ static void hide_etherboot ( void ) {
148 148
 
149 149
 	/* Initialise the hidden regions */
150 150
 	hide_basemem();
151
-	hide_umalloc ( virt_to_phys ( _text ), virt_to_phys ( _text ) );
152
-	hide_text();
151
+	hide_umalloc ( virt_to_phys ( _textdata ), virt_to_phys ( _textdata ) );
152
+	hide_textdata();
153 153
 
154 154
 	/* Some really moronic BIOSes bring up the PXE stack via the
155 155
 	 * UNDI loader entry point and then don't bother to unload it
@@ -161,8 +161,8 @@ static void hide_etherboot ( void ) {
161 161
 	 * We use a heuristic to guess whether or not we are being
162 162
 	 * loaded sensibly.
163 163
 	 */
164
-	rm_cs_top = ( ( ( rm_cs << 4 ) + _text16_size + 1024 - 1 ) >> 10 );
165
-	rm_ds_top = ( ( ( rm_ds << 4 ) + _data16_size + 1024 - 1 ) >> 10 );
164
+	rm_cs_top = ( ( ( rm_cs << 4 ) + _text16_memsz + 1024 - 1 ) >> 10 );
165
+	rm_ds_top = ( ( ( rm_ds << 4 ) + _data16_memsz + 1024 - 1 ) >> 10 );
166 166
 	fbms = get_fbms();
167 167
 	if ( ( rm_cs_top < fbms ) && ( rm_ds_top < fbms ) ) {
168 168
 		DBG ( "Detected potentially unsafe UNDI load at CS=%04x "

+ 7
- 7
src/arch/i386/interface/pxe/pxe_entry.S Näytä tiedosto

@@ -44,10 +44,10 @@ ppxe:
44 44
 	.byte SegDescCnt		/* SegDescCnt */
45 45
 	.word 0				/* FirstSelector */
46 46
 pxe_segments:
47
-	.word 0, 0, 0, _data16_size	/* Stack */
48
-	.word 0, 0, 0, _data16_size	/* UNDIData */
49
-	.word 0, 0, 0, _text16_size	/* UNDICode */
50
-	.word 0, 0, 0, _text16_size	/* UNDICodeWrite */
47
+	.word 0, 0, 0, _data16_memsz	/* Stack */
48
+	.word 0, 0, 0, _data16_memsz	/* UNDIData */
49
+	.word 0, 0, 0, _text16_memsz	/* UNDICode */
50
+	.word 0, 0, 0, _text16_memsz	/* UNDICodeWrite */
51 51
 	.word 0, 0, 0, 0		/* BC_Data */
52 52
 	.word 0, 0, 0, 0		/* BC_Code */
53 53
 	.word 0, 0, 0, 0		/* BC_CodeWrite */
@@ -76,15 +76,15 @@ pxenv:
76 76
 	.long 0				/* PMEntry */
77 77
 	.word 0				/* PMSelector */
78 78
 	.word 0				/* StackSeg */
79
-	.word _data16_size		/* StackSize */
79
+	.word _data16_memsz		/* StackSize */
80 80
 	.word 0				/* BC_CodeSeg */
81 81
 	.word 0				/* BC_CodeSize */
82 82
 	.word 0				/* BC_DataSeg */
83 83
 	.word 0				/* BC_DataSize */
84 84
 	.word 0				/* UNDIDataSeg */
85
-	.word _data16_size		/* UNDIDataSize */
85
+	.word _data16_memsz		/* UNDIDataSize */
86 86
 	.word 0				/* UNDICodeSeg */
87
-	.word _text16_size		/* UNDICodeSize */
87
+	.word _text16_memsz		/* UNDICodeSize */
88 88
 	.word ppxe, 0			/* PXEPtr */
89 89
 	.equ	pxenv_length, . - pxenv
90 90
 	.size	pxenv, . - pxenv

+ 1
- 1
src/arch/i386/prefix/dskprefix.S Näytä tiedosto

@@ -144,7 +144,7 @@ got_sectors:
144 144
 	/* Jump to loaded copy */
145 145
 	ljmp	$SYSSEG, $start_runtime
146 146
 
147
-endseg:	.word SYSSEG + _load_size_pgh
147
+endseg:	.word SYSSEG + _filesz_pgh
148 148
 	.section ".zinfo.fixup", "a"	/* Compressor fixup information */
149 149
 	.ascii	"SUBW"
150 150
 	.long	endseg

+ 1
- 1
src/arch/i386/prefix/hdprefix.S Näytä tiedosto

@@ -63,7 +63,7 @@ max_sector:
63 63
 max_head:
64 64
 	.byte	0
65 65
 load_length:
66
-	.long	_load_size_sect
66
+	.long	_filesz_sect
67 67
 	
68 68
 	.section ".zinfo.fixup", "a"	/* Compressor fixup information */
69 69
 	.ascii	"SUBL"

+ 18
- 18
src/arch/i386/prefix/libprefix.S Näytä tiedosto

@@ -511,11 +511,11 @@ alloc_basemem:
511 511
 	shlw	$6, %ax
512 512
 
513 513
 	/* .data16 segment address */
514
-	subw	$_data16_size_pgh, %ax
514
+	subw	$_data16_memsz_pgh, %ax
515 515
 	pushw	%ax
516 516
 
517 517
 	/* .text16 segment address */
518
-	subw	$_text16_size_pgh, %ax
518
+	subw	$_text16_memsz_pgh, %ax
519 519
 	pushw	%ax
520 520
 
521 521
 	/* Update FBMS */
@@ -594,19 +594,19 @@ install_prealloc:
594 594
 	jnz	1f
595 595
 	movw	%cs, %si
596 596
 	shll	$4, %esi
597
-1:	addl	$_payload_offset, %esi
597
+1:	addl	$_payload_lma, %esi
598 598
 
599 599
 	/* Install .text16 and .data16 */
600 600
 	pushl	%edi
601 601
 	movzwl	%ax, %edi
602 602
 	shll	$4, %edi
603
-	movl	$_text16_size, %ecx
603
+	movl	$_text16_memsz, %ecx
604 604
 	movl	%ecx, %edx
605 605
 	call	install_block		/* .text16 */
606 606
 	movzwl	%bx, %edi
607 607
 	shll	$4, %edi
608
-	movl	$_data16_progbits_size, %ecx
609
-	movl	$_data16_size, %edx
608
+	movl	$_data16_filesz, %ecx
609
+	movl	$_data16_memsz, %edx
610 610
 	call	install_block		/* .data16 */
611 611
 	popl	%edi
612 612
 
@@ -622,8 +622,8 @@ install_prealloc:
622 622
 	 * prior to reading the E820 memory map and relocating
623 623
 	 * properly.
624 624
 	 */
625
-	movl	$_textdata_progbits_size, %ecx
626
-	movl	$_textdata_size, %edx
625
+	movl	$_textdata_filesz, %ecx
626
+	movl	$_textdata_memsz, %edx
627 627
 	call	install_block
628 628
 
629 629
 	/* Initialise librm at current location */
@@ -681,25 +681,25 @@ prot_call_vector:
681 681
 #if COMPRESS
682 682
 	.section ".zinfo", "a"
683 683
 	.ascii	"COPY"
684
-	.long	_prefix_load_offset
685
-	.long	_prefix_progbits_size
684
+	.long	_prefix_lma
685
+	.long	_prefix_filesz
686 686
 	.long	_max_align
687 687
 	.ascii	"PACK"
688
-	.long	_text16_load_offset
689
-	.long	_text16_progbits_size
688
+	.long	_text16_lma
689
+	.long	_text16_filesz
690 690
 	.long	_max_align
691 691
 	.ascii	"PACK"
692
-	.long	_data16_load_offset
693
-	.long	_data16_progbits_size
692
+	.long	_data16_lma
693
+	.long	_data16_filesz
694 694
 	.long	_max_align
695 695
 	.ascii	"PACK"
696
-	.long	_textdata_load_offset
697
-	.long	_textdata_progbits_size
696
+	.long	_textdata_lma
697
+	.long	_textdata_filesz
698 698
 	.long	_max_align
699 699
 #else /* COMPRESS */
700 700
 	.section ".zinfo", "a"
701 701
 	.ascii	"COPY"
702
-	.long	_prefix_load_offset
703
-	.long	_load_size
702
+	.long	_prefix_lma
703
+	.long	_filesz
704 704
 	.long	_max_align
705 705
 #endif /* COMPRESS */

+ 1
- 1
src/arch/i386/prefix/lkrnprefix.S Näytä tiedosto

@@ -92,7 +92,7 @@ setup_sects:
92 92
 root_flags: 
93 93
 	.word	0
94 94
 syssize: 
95
-	.long	_load_size_pgh - PREFIXPGH
95
+	.long	_filesz_pgh - PREFIXPGH
96 96
 
97 97
 	.section ".zinfo.fixup", "a"	/* Compressor fixup information */
98 98
 	.ascii	"SUBL"

+ 2
- 2
src/arch/i386/prefix/nbiprefix.S Näytä tiedosto

@@ -32,8 +32,8 @@ segment_header:
32 32
 	.byte	0
33 33
 	.byte	0x04		/* Last segment */
34 34
 	.long	0x00007e00
35
-imglen:	.long	_load_size - 512
36
-memlen:	.long	_load_size - 512
35
+imglen:	.long	_filesz - 512
36
+memlen:	.long	_filesz - 512
37 37
 	.size	segment_header, . - segment_header
38 38
 
39 39
 	.section ".zinfo.fixup", "a"	/* Compressor fixup information */

+ 7
- 7
src/arch/i386/prefix/romprefix.S Näytä tiedosto

@@ -30,7 +30,7 @@
30 30
 	.org	0x00
31 31
 romheader:
32 32
 	.word	0xAA55			/* BIOS extension signature */
33
-romheader_size:	.byte _load_size_sect	/* Size in 512-byte blocks */
33
+romheader_size:	.byte _filesz_sect	/* Size in 512-byte blocks */
34 34
 	jmp	init			/* Initialisation vector */
35 35
 checksum:
36 36
 	.byte	0
@@ -58,12 +58,12 @@ pciheader:
58 58
 	.byte	0x03			/* PCI data structure revision */
59 59
 	.byte	0x02, 0x00, 0x00	/* Class code */
60 60
 pciheader_image_length:
61
-	.word	_load_size_sect		/* Image length */
61
+	.word	_filesz_sect		/* Image length */
62 62
 	.word	0x0001			/* Revision level */
63 63
 	.byte	0x00			/* Code type */
64 64
 	.byte	0x80			/* Last image indicator */
65 65
 pciheader_runtime_length:
66
-	.word	_load_size_sect		/* Maximum run-time image length */
66
+	.word	_filesz_sect		/* Maximum run-time image length */
67 67
 	.word	0x0000			/* Configuration utility code header */
68 68
 	.word	0x0000			/* DMTF CLP entry point */
69 69
 	.equ pciheader_len, . - pciheader
@@ -130,9 +130,9 @@ undiheader:
130 130
 	.byte	0			/* Structure revision */
131 131
 	.byte	0,1,2			/* PXE version: 2.1.0 */
132 132
 	.word	undiloader		/* Offset to loader routine */
133
-	.word	_data16_size		/* Stack segment size */
134
-	.word	_data16_size		/* Data segment size */
135
-	.word	_text16_size		/* Code segment size */
133
+	.word	_data16_memsz		/* Stack segment size */
134
+	.word	_data16_memsz		/* Data segment size */
135
+	.word	_text16_memsz		/* Code segment size */
136 136
 	.ascii	"PCIR"			/* Bus type */
137 137
 	.equ undiheader_len, . - undiheader
138 138
 	.size undiheader, . - undiheader
@@ -294,7 +294,7 @@ pmm_scan:
294 294
 	/* Shrink ROM and update checksum */
295 295
 	xorw	%bx, %bx
296 296
 	xorw	%si, %si
297
-	movw	$_prefix_size_sect, %cx
297
+	movw	$_prefix_memsz_sect, %cx
298 298
 	movb	%cl, romheader_size
299 299
 	shlw	$9, %cx
300 300
 1:	lodsb

+ 94
- 177
src/arch/i386/scripts/i386.lds Näytä tiedosto

@@ -5,15 +5,9 @@
5 5
  *
6 6
  */
7 7
 
8
-OUTPUT_FORMAT ( "elf32-i386", "elf32-i386", "elf32-i386" )
9
-OUTPUT_ARCH ( i386 )
10
-ENTRY ( _entry )
11
-
12 8
 SECTIONS {
13 9
 
14
-    /* All sections in the resulting file have consecutive load
15
-     * addresses, but may have individual link addresses depending on
16
-     * the memory model being used.
10
+    /* Each section starts at a virtual address of zero.
17 11
      *
18 12
      * We guarantee alignment of virtual addresses to any alignment
19 13
      * specified by the constituent object files (e.g. via
@@ -30,163 +24,123 @@ SECTIONS {
30 24
      *
31 25
      */
32 26
 
33
-    /*
34
-     * Weak symbols that need zero values if not otherwise defined
35
-     */
36
-
37
-    . = 0;
38
-    .weak : AT ( 0 ) {
39
-	*(.weak)
40
-    }
41
-    _assert = ASSERT ( ( . == 0 ), ".weak is non-zero length" );
42
-
43 27
     /*
44 28
      * The prefix
29
+     *
45 30
      */
46 31
 
47
-    _prefix_link_addr = 0;
48
-    . = _prefix_link_addr;
49
-    _prefix = .;
50
-
51
-    .prefix : AT ( _prefix_load_offset + __prefix ) {
52
-	__prefix = .;
53
-	_entry = .;
32
+    .prefix 0x0 : AT ( _prefix_lma ) {
33
+	_prefix = .;
54 34
 	*(.prefix)
55 35
 	*(.prefix.*)
56
-	_eprefix_progbits = .;
36
+	_mprefix = .;
37
+    } .prefix_bss (NOLOAD) : {
38
+	_eprefix = .;
57 39
     }
58
-    
59
-    _eprefix = .;
40
+    _prefix_filesz	= ABSOLUTE ( _mprefix - _prefix );
41
+    _prefix_memsz	= ABSOLUTE ( _eprefix - _prefix );
60 42
 
61 43
     /*
62
-     * The 16-bit sections, if present
44
+     * The 16-bit (real-mode) code section
45
+     *
63 46
      */
64 47
 
65
-    _text16_link_addr = 0;
66
-    . = _text16_link_addr;
67
-    _text16 = .;
68
-
69
-    /* We need to allow code at the NULL address in .text16 */
70
-
71
-    .text16 : AT ( _text16_load_offset + __text16 ) {
72
-	__text16 = .;
48
+    .text16 0x0 : AT ( _text16_lma ) {
49
+	_text16 = .;
73 50
 	*(.text16.null)
74
-	. += 1;			/* Prevent NULL being valid */
51
+	. += 1;				/* Prevent NULL being valid */
75 52
 	*(.text16)
76 53
 	*(.text16.*)
77
-	_etext16_progbits = .;
78
-    } = 0x9090
79
-
80
-    _etext16 = .;
81
-
82
-    _data16_link_addr = 0;
83
-    . = _data16_link_addr;
84
-    _data16 = .;
54
+	_mtext16 = .;
55
+    } .text16_bss (NOLOAD) : {
56
+	_etext16 = .;
57
+    }
58
+    _text16_filesz	= ABSOLUTE ( _mtext16 - _text16 );
59
+    _text16_memsz	= ABSOLUTE ( _etext16 - _text16 );
85 60
 
86
-    . += 1;			/* Prevent NULL being valid */
61
+    /*
62
+     * The 16-bit (real-mode) data section
63
+     *
64
+     */
87 65
 
88
-    .rodata16 : AT ( _data16_load_offset + __rodata16 ) {
89
-	__rodata16 = .;
66
+    .data16 0x0 : AT ( _data16_lma ) {
67
+	_data16 = .;
68
+	. += 1;				/* Prevent NULL being valid */
90 69
 	*(.rodata16)
91 70
 	*(.rodata16.*)
92
-    }
93
-    .data16 : AT ( _data16_load_offset + __data16 ) {
94
-	__data16 = .;
95 71
 	*(.data16)
96 72
 	*(.data16.*)
97
-	_edata16_progbits = .;
98
-    }
99
-    .bss16 : AT ( _data16_load_offset + __bss16 ) {
100
-	__bss16 = .;
101
-	_bss16 = .;
73
+	_mdata16 = .;
74
+    } .data16_bss (NOLOAD) : {
102 75
 	*(.bss16)
103 76
 	*(.bss16.*)
104
-	_ebss16 = .;
105
-    }
106
-    .stack16 : AT ( _data16_load_offset + __stack16 ) {
107
-	__stack16 = .;
108 77
 	*(.stack16)
109 78
 	*(.stack16.*)
79
+	_edata16 = .;
110 80
     }
111
-
112
-    _edata16 = .;
81
+    _data16_filesz	= ABSOLUTE ( _mdata16 - _data16 );
82
+    _data16_memsz	= ABSOLUTE ( _edata16 - _data16 );
113 83
 
114 84
     /*
115 85
      * The 32-bit sections
86
+     *
116 87
      */
117 88
 
118
-    _textdata_link_addr = 0;
119
-    . = _textdata_link_addr;
120
-    _textdata = .;
121
-
122
-    _text = .;
123
-
124
-    . += 1;			/* Prevent NULL being valid */
125
-
126
-    .text : AT ( _textdata_load_offset + __text ) {
127
-	__text = .;
89
+    .textdata 0x0 : AT ( _textdata_lma ) {
90
+	_textdata = .;
128 91
 	*(.text.null_trap)
92
+	. += 1;				/* Prevent NULL being valid */
129 93
 	*(.text)
130 94
 	*(.text.*)
131
-    } = 0x9090
132
-
133
-    _etext = .;
134
-
135
-    _data = .;
136
-
137
-    .rodata : AT ( _textdata_load_offset + __rodata ) {
138
-	__rodata = .;
139 95
 	*(.rodata)
140 96
 	*(.rodata.*)
141
-    }
142
-    .data : AT ( _textdata_load_offset + __data ) {
143
-	__data = .;
144 97
 	*(.data)
145 98
 	*(.data.*)
146 99
 	*(SORT(.tbl.*))		/* Various tables.  See include/tables.h */
147
-	_etextdata_progbits = .;
148
-    }
149
-    .bss : AT ( _textdata_load_offset + __bss ) {
150
-	__bss = .;
151
-	_bss = .;
100
+	_mtextdata = .;
101
+    } .textdata_bss (NOLOAD) : {
152 102
 	*(.bss)
153 103
 	*(.bss.*)
154 104
 	*(COMMON)
155
-	_ebss = .;
156
-    }
157
-    .stack : AT ( _textdata_load_offset + __stack ) {
158
-	__stack = .;
159 105
 	*(.stack)
160 106
 	*(.stack.*)
107
+	_etextdata = .;
161 108
     }
162
-
163
-    _edata = .;
164
-
165
-    _etextdata = .;
166
-
167
-    _end = .;
109
+    _textdata_filesz	= ABSOLUTE ( _mtextdata - _textdata );
110
+    _textdata_memsz	= ABSOLUTE ( _etextdata - _textdata );
168 111
 
169 112
     /*
170 113
      * Compressor information block
114
+     *
171 115
      */
172 116
 
173
-    _zinfo_link_addr = 0;
174
-    . = _zinfo_link_addr;
175
-    _zinfo = .;
176
-
177
-    .zinfo : AT ( _zinfo_load_offset + __zinfo ) {
178
-	__zinfo = .;
179
-	_entry = .;
117
+    .zinfo 0x0 : AT ( _zinfo_lma ) {
118
+	_zinfo = .;
180 119
 	*(.zinfo)
181 120
 	*(.zinfo.*)
182
-	_ezinfo_progbits = .;
121
+	_mzinfo = .;
122
+    } .zinfo_bss (NOLOAD) : {
123
+	_ezinfo = .;
183 124
     }
184
-    
185
-    _ezinfo = .;
125
+    _zinfo_filesz	= ABSOLUTE ( _mzinfo - _zinfo );
126
+    _zinfo_memsz	= ABSOLUTE ( _ezinfo - _zinfo );
127
+
128
+    /*
129
+     * Weak symbols that need zero values if not otherwise defined
130
+     *
131
+     */
132
+
133
+    .weak 0x0 : {
134
+	_weak = .;
135
+	*(.weak)
136
+	_eweak = .;
137
+    }
138
+    _assert = ASSERT ( ( _weak == _eweak ), ".weak is non-zero length" );
186 139
 
187 140
     /*
188 141
      * Dispose of the comment and note sections to make the link map
189 142
      * easier to read
143
+     *
190 144
      */
191 145
 
192 146
     /DISCARD/ : {
@@ -195,90 +149,53 @@ SECTIONS {
195 149
     }
196 150
 
197 151
     /*
198
-     * Load address calculations.  The slightly obscure nature of the
199
-     * calculations is because ALIGN(x) can only operate on the
200
-     * location counter.
152
+     * Load address calculations.  In older versions of ld, ALIGN()
153
+     * can operate only on the location counter, so we use that.
154
+     *
201 155
      */
202 156
 
203
-    _max_align		    = 16;
204
-    _load_addr		    = 0;
205
-
206
-    .			    = _load_addr;
207
-
208
-    .			   -= _prefix_link_addr;
209
-    _prefix_load_offset	    = ALIGN ( _max_align );
210
-    _prefix_load_addr	    = _prefix_link_addr + _prefix_load_offset;
211
-    _prefix_size	    = _eprefix - _prefix;
212
-    _prefix_progbits_size   = _eprefix_progbits - _prefix;
213
-    .			    = _prefix_load_addr + _prefix_progbits_size;
214
-
215
-    .			   -= _text16_link_addr;
216
-    _text16_load_offset	    = ALIGN ( _max_align );
217
-    _text16_load_addr	    = _text16_link_addr + _text16_load_offset;
218
-    _text16_size	    = _etext16 - _text16;
219
-    _text16_progbits_size   = _etext16_progbits - _text16;
220
-    .			    = _text16_load_addr + _text16_progbits_size;
157
+    PROVIDE ( _max_align = 16 );
158
+    .			= 0;
221 159
 
222
-    .			   -= _data16_link_addr;
223
-    _data16_load_offset	    = ALIGN ( _max_align );
224
-    _data16_load_addr	    = _data16_link_addr + _data16_load_offset;
225
-    _data16_size	    = _edata16 - _data16;
226
-    _data16_progbits_size   = _edata16_progbits - _data16;
227
-    .			    = _data16_load_addr + _data16_progbits_size;
160
+    _prefix_lma		= .;
161
+    .			+= _prefix_filesz;
162
+    .			= ALIGN ( _max_align );
228 163
 
229
-    .			   -= _textdata_link_addr;
230
-    _textdata_load_offset   = ALIGN ( _max_align );
231
-    _textdata_load_addr	    = _textdata_link_addr + _textdata_load_offset;
232
-    _textdata_size	    = _etextdata - _textdata;
233
-    _textdata_progbits_size = _etextdata_progbits - _textdata;
234
-    .			    = _textdata_load_addr + _textdata_progbits_size;
164
+    _payload_lma	= .;
235 165
 
236
-    _load_size		    = . - _load_addr;
166
+    _text16_lma		= .;
167
+    .			+= _text16_filesz;
168
+    .			= ALIGN ( _max_align );
237 169
 
238
-    .			   -= _zinfo_link_addr;
239
-    _zinfo_load_offset	    = ALIGN ( _max_align );
240
-    _zinfo_load_addr	    = _zinfo_link_addr + _zinfo_load_offset;
241
-    _zinfo_size		    = _ezinfo - _zinfo;
242
-    _zinfo_progbits_size    = _ezinfo_progbits - _zinfo;
243
-    .			    = _zinfo_load_addr + _zinfo_progbits_size;
170
+    _data16_lma		= .;
171
+    .			+= _data16_filesz;
172
+    .			= ALIGN ( _max_align );
244 173
 
245
-    _payload_offset	    = _text16_load_offset;
174
+    _textdata_lma	= .;
175
+    .			+= _textdata_filesz;
176
+    .			= ALIGN ( _max_align );
246 177
 
247
-    /*
248
-     * Alignment checks.  ALIGN() can only operate on the location
249
-     * counter, so we set the location counter to each value we want
250
-     * to check.
251
-     */
252
-
253
-    . = _prefix_load_addr - _prefix_link_addr;
254
-    _assert = ASSERT ( ( . == ALIGN ( _max_align ) ),
255
-		       "_prefix is badly aligned" );
256
-
257
-    . = _text16_load_addr - _text16_link_addr;
258
-    _assert = ASSERT ( ( . == ALIGN ( _max_align ) ),
259
-		       "_text16 is badly aligned" );
178
+    _filesz		= .; /* Do not include zinfo block in file size */
260 179
 
261
-    . = _data16_load_addr - _data16_link_addr;
262
-    _assert = ASSERT ( ( . == ALIGN ( _max_align ) ),
263
-		       "_data16 is badly aligned" );
264
-
265
-    . = _textdata_load_addr - _textdata_link_addr;
266
-    _assert = ASSERT ( ( . == ALIGN ( _max_align ) ),
267
-		       "_text is badly aligned" );
180
+    _zinfo_lma		= .;
181
+    .			+= _zinfo_filesz;
182
+    .			= ALIGN ( _max_align );
268 183
 
269 184
     /*
270 185
      * Values calculated to save code from doing it
186
+     *
271 187
      */
272
-    _prefix_size_pgh	= ( ( _prefix_size + 15 ) / 16 );
273
-    _prefix_size_sect	= ( ( _prefix_size + 511 ) / 512 );
274
-    _text16_size_pgh	= ( ( _text16_size + 15 ) / 16 );
275
-    _data16_size_pgh	= ( ( _data16_size + 15 ) / 16 );
188
+    _prefix_memsz_pgh	= ( ( _prefix_memsz + 15 ) / 16 );
189
+    _prefix_memsz_sect	= ( ( _prefix_memsz + 511 ) / 512 );
190
+    _text16_memsz_pgh	= ( ( _text16_memsz + 15 ) / 16 );
191
+    _data16_memsz_pgh	= ( ( _data16_memsz + 15 ) / 16 );
276 192
 
277 193
     /*
278
-     * Load sizes in paragraphs and sectors.  Note that wherever the
279
-     * _load_size variables are used, there must be a corresponding
194
+     * File size in paragraphs and sectors.  Note that wherever the
195
+     * _filesz variables are used, there must be a corresponding
280 196
      * .zinfo.fixup section.
197
+     *
281 198
      */
282
-    _load_size_pgh	= ( ( _load_size + 15 ) / 16 );
283
-    _load_size_sect	= ( ( _load_size + 511 ) / 512 );
199
+    _filesz_pgh		= ( ( _filesz + 15 ) / 16 );
200
+    _filesz_sect	= ( ( _filesz + 511 ) / 512 );
284 201
 }

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Peruuta
Tallenna