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[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.
This commit is contained in:
Michael Brown 2008-10-09 22:22:01 +01:00
parent 3029eb0e84
commit 13d09e6719
11 changed files with 153 additions and 236 deletions

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

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@ -66,7 +66,7 @@
.align 16 .align 16
.globl hidemem_base .globl hidemem_base
.globl hidemem_umalloc .globl hidemem_umalloc
.globl hidemem_text .globl hidemem_textdata
memory_windows: memory_windows:
base_memory_window: .long 0x00000000, 0x00000000 /* Start of memory */ base_memory_window: .long 0x00000000, 0x00000000 /* Start of memory */
@ -76,7 +76,7 @@ ext_memory_window: .long 0x000a0000, 0x00000000 /* 640kB mark */
hidemem_umalloc: .long 0xffffffff, 0xffffffff /* Changes at runtime */ hidemem_umalloc: .long 0xffffffff, 0xffffffff /* Changes at runtime */
.long 0xffffffff, 0xffffffff /* Changes at runtime */ .long 0xffffffff, 0xffffffff /* Changes at runtime */
hidemem_text: .long 0xffffffff, 0xffffffff /* Changes at runtime */ hidemem_textdata: .long 0xffffffff, 0xffffffff /* Changes at runtime */
.long 0xffffffff, 0xffffffff /* Changes at runtime */ .long 0xffffffff, 0xffffffff /* Changes at runtime */
.long 0xffffffff, 0xffffffff /* End of memory */ .long 0xffffffff, 0xffffffff /* End of memory */

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@ -55,8 +55,8 @@ extern struct hidden_region __data16 ( hidemem_umalloc );
#define hidemem_umalloc __use_data16 ( hidemem_umalloc ) #define hidemem_umalloc __use_data16 ( hidemem_umalloc )
/** Hidden text memory */ /** Hidden text memory */
extern struct hidden_region __data16 ( hidemem_text ); extern struct hidden_region __data16 ( hidemem_textdata );
#define hidemem_text __use_data16 ( hidemem_text ) #define hidemem_textdata __use_data16 ( hidemem_textdata )
/** Assembly routine in e820mangler.S */ /** Assembly routine in e820mangler.S */
extern void int15(); extern void int15();
@ -66,12 +66,12 @@ extern struct segoff __text16 ( int15_vector );
#define int15_vector __use_text16 ( int15_vector ) #define int15_vector __use_text16 ( int15_vector )
/* The linker defines these symbols for us */ /* The linker defines these symbols for us */
extern char _text[]; extern char _textdata[];
extern char _end[]; extern char _etextdata[];
extern char _text16_size[]; extern char _text16_memsz[];
#define _text16_size ( ( unsigned int ) _text16_size ) #define _text16_memsz ( ( unsigned int ) _text16_memsz )
extern char _data16_size[]; extern char _data16_memsz[];
#define _data16_size ( ( unsigned int ) _data16_size ) #define _data16_memsz ( ( unsigned int ) _data16_memsz )
/** /**
* Hide region of memory from system memory map * Hide region of memory from system memory map
@ -110,7 +110,7 @@ void hide_basemem ( void ) {
* *
*/ */
void hide_umalloc ( physaddr_t start, physaddr_t end ) { void hide_umalloc ( physaddr_t start, physaddr_t end ) {
assert ( end <= virt_to_phys ( _text ) ); assert ( end <= virt_to_phys ( _textdata ) );
hide_region ( &hidemem_umalloc, start, end ); hide_region ( &hidemem_umalloc, start, end );
} }
@ -118,9 +118,9 @@ void hide_umalloc ( physaddr_t start, physaddr_t end ) {
* Hide .text and .data * Hide .text and .data
* *
*/ */
void hide_text ( void ) { void hide_textdata ( void ) {
hide_region ( &hidemem_text, virt_to_phys ( _text ), hide_region ( &hidemem_textdata, virt_to_phys ( _textdata ),
virt_to_phys ( _end ) ); virt_to_phys ( _etextdata ) );
} }
/** /**
@ -148,8 +148,8 @@ static void hide_etherboot ( void ) {
/* Initialise the hidden regions */ /* Initialise the hidden regions */
hide_basemem(); hide_basemem();
hide_umalloc ( virt_to_phys ( _text ), virt_to_phys ( _text ) ); hide_umalloc ( virt_to_phys ( _textdata ), virt_to_phys ( _textdata ) );
hide_text(); hide_textdata();
/* Some really moronic BIOSes bring up the PXE stack via the /* Some really moronic BIOSes bring up the PXE stack via the
* UNDI loader entry point and then don't bother to unload it * UNDI loader entry point and then don't bother to unload it
@ -161,8 +161,8 @@ static void hide_etherboot ( void ) {
* We use a heuristic to guess whether or not we are being * We use a heuristic to guess whether or not we are being
* loaded sensibly. * loaded sensibly.
*/ */
rm_cs_top = ( ( ( rm_cs << 4 ) + _text16_size + 1024 - 1 ) >> 10 ); rm_cs_top = ( ( ( rm_cs << 4 ) + _text16_memsz + 1024 - 1 ) >> 10 );
rm_ds_top = ( ( ( rm_ds << 4 ) + _data16_size + 1024 - 1 ) >> 10 ); rm_ds_top = ( ( ( rm_ds << 4 ) + _data16_memsz + 1024 - 1 ) >> 10 );
fbms = get_fbms(); fbms = get_fbms();
if ( ( rm_cs_top < fbms ) && ( rm_ds_top < fbms ) ) { if ( ( rm_cs_top < fbms ) && ( rm_ds_top < fbms ) ) {
DBG ( "Detected potentially unsafe UNDI load at CS=%04x " DBG ( "Detected potentially unsafe UNDI load at CS=%04x "

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@ -44,10 +44,10 @@ ppxe:
.byte SegDescCnt /* SegDescCnt */ .byte SegDescCnt /* SegDescCnt */
.word 0 /* FirstSelector */ .word 0 /* FirstSelector */
pxe_segments: pxe_segments:
.word 0, 0, 0, _data16_size /* Stack */ .word 0, 0, 0, _data16_memsz /* Stack */
.word 0, 0, 0, _data16_size /* UNDIData */ .word 0, 0, 0, _data16_memsz /* UNDIData */
.word 0, 0, 0, _text16_size /* UNDICode */ .word 0, 0, 0, _text16_memsz /* UNDICode */
.word 0, 0, 0, _text16_size /* UNDICodeWrite */ .word 0, 0, 0, _text16_memsz /* UNDICodeWrite */
.word 0, 0, 0, 0 /* BC_Data */ .word 0, 0, 0, 0 /* BC_Data */
.word 0, 0, 0, 0 /* BC_Code */ .word 0, 0, 0, 0 /* BC_Code */
.word 0, 0, 0, 0 /* BC_CodeWrite */ .word 0, 0, 0, 0 /* BC_CodeWrite */
@ -76,15 +76,15 @@ pxenv:
.long 0 /* PMEntry */ .long 0 /* PMEntry */
.word 0 /* PMSelector */ .word 0 /* PMSelector */
.word 0 /* StackSeg */ .word 0 /* StackSeg */
.word _data16_size /* StackSize */ .word _data16_memsz /* StackSize */
.word 0 /* BC_CodeSeg */ .word 0 /* BC_CodeSeg */
.word 0 /* BC_CodeSize */ .word 0 /* BC_CodeSize */
.word 0 /* BC_DataSeg */ .word 0 /* BC_DataSeg */
.word 0 /* BC_DataSize */ .word 0 /* BC_DataSize */
.word 0 /* UNDIDataSeg */ .word 0 /* UNDIDataSeg */
.word _data16_size /* UNDIDataSize */ .word _data16_memsz /* UNDIDataSize */
.word 0 /* UNDICodeSeg */ .word 0 /* UNDICodeSeg */
.word _text16_size /* UNDICodeSize */ .word _text16_memsz /* UNDICodeSize */
.word ppxe, 0 /* PXEPtr */ .word ppxe, 0 /* PXEPtr */
.equ pxenv_length, . - pxenv .equ pxenv_length, . - pxenv
.size pxenv, . - pxenv .size pxenv, . - pxenv

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

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

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@ -511,11 +511,11 @@ alloc_basemem:
shlw $6, %ax shlw $6, %ax
/* .data16 segment address */ /* .data16 segment address */
subw $_data16_size_pgh, %ax subw $_data16_memsz_pgh, %ax
pushw %ax pushw %ax
/* .text16 segment address */ /* .text16 segment address */
subw $_text16_size_pgh, %ax subw $_text16_memsz_pgh, %ax
pushw %ax pushw %ax
/* Update FBMS */ /* Update FBMS */
@ -594,19 +594,19 @@ install_prealloc:
jnz 1f jnz 1f
movw %cs, %si movw %cs, %si
shll $4, %esi shll $4, %esi
1: addl $_payload_offset, %esi 1: addl $_payload_lma, %esi
/* Install .text16 and .data16 */ /* Install .text16 and .data16 */
pushl %edi pushl %edi
movzwl %ax, %edi movzwl %ax, %edi
shll $4, %edi shll $4, %edi
movl $_text16_size, %ecx movl $_text16_memsz, %ecx
movl %ecx, %edx movl %ecx, %edx
call install_block /* .text16 */ call install_block /* .text16 */
movzwl %bx, %edi movzwl %bx, %edi
shll $4, %edi shll $4, %edi
movl $_data16_progbits_size, %ecx movl $_data16_filesz, %ecx
movl $_data16_size, %edx movl $_data16_memsz, %edx
call install_block /* .data16 */ call install_block /* .data16 */
popl %edi popl %edi
@ -622,8 +622,8 @@ install_prealloc:
* prior to reading the E820 memory map and relocating * prior to reading the E820 memory map and relocating
* properly. * properly.
*/ */
movl $_textdata_progbits_size, %ecx movl $_textdata_filesz, %ecx
movl $_textdata_size, %edx movl $_textdata_memsz, %edx
call install_block call install_block
/* Initialise librm at current location */ /* Initialise librm at current location */
@ -681,25 +681,25 @@ prot_call_vector:
#if COMPRESS #if COMPRESS
.section ".zinfo", "a" .section ".zinfo", "a"
.ascii "COPY" .ascii "COPY"
.long _prefix_load_offset .long _prefix_lma
.long _prefix_progbits_size .long _prefix_filesz
.long _max_align .long _max_align
.ascii "PACK" .ascii "PACK"
.long _text16_load_offset .long _text16_lma
.long _text16_progbits_size .long _text16_filesz
.long _max_align .long _max_align
.ascii "PACK" .ascii "PACK"
.long _data16_load_offset .long _data16_lma
.long _data16_progbits_size .long _data16_filesz
.long _max_align .long _max_align
.ascii "PACK" .ascii "PACK"
.long _textdata_load_offset .long _textdata_lma
.long _textdata_progbits_size .long _textdata_filesz
.long _max_align .long _max_align
#else /* COMPRESS */ #else /* COMPRESS */
.section ".zinfo", "a" .section ".zinfo", "a"
.ascii "COPY" .ascii "COPY"
.long _prefix_load_offset .long _prefix_lma
.long _load_size .long _filesz
.long _max_align .long _max_align
#endif /* COMPRESS */ #endif /* COMPRESS */

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

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

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@ -30,7 +30,7 @@
.org 0x00 .org 0x00
romheader: romheader:
.word 0xAA55 /* BIOS extension signature */ .word 0xAA55 /* BIOS extension signature */
romheader_size: .byte _load_size_sect /* Size in 512-byte blocks */ romheader_size: .byte _filesz_sect /* Size in 512-byte blocks */
jmp init /* Initialisation vector */ jmp init /* Initialisation vector */
checksum: checksum:
.byte 0 .byte 0
@ -58,12 +58,12 @@ pciheader:
.byte 0x03 /* PCI data structure revision */ .byte 0x03 /* PCI data structure revision */
.byte 0x02, 0x00, 0x00 /* Class code */ .byte 0x02, 0x00, 0x00 /* Class code */
pciheader_image_length: pciheader_image_length:
.word _load_size_sect /* Image length */ .word _filesz_sect /* Image length */
.word 0x0001 /* Revision level */ .word 0x0001 /* Revision level */
.byte 0x00 /* Code type */ .byte 0x00 /* Code type */
.byte 0x80 /* Last image indicator */ .byte 0x80 /* Last image indicator */
pciheader_runtime_length: pciheader_runtime_length:
.word _load_size_sect /* Maximum run-time image length */ .word _filesz_sect /* Maximum run-time image length */
.word 0x0000 /* Configuration utility code header */ .word 0x0000 /* Configuration utility code header */
.word 0x0000 /* DMTF CLP entry point */ .word 0x0000 /* DMTF CLP entry point */
.equ pciheader_len, . - pciheader .equ pciheader_len, . - pciheader
@ -130,9 +130,9 @@ undiheader:
.byte 0 /* Structure revision */ .byte 0 /* Structure revision */
.byte 0,1,2 /* PXE version: 2.1.0 */ .byte 0,1,2 /* PXE version: 2.1.0 */
.word undiloader /* Offset to loader routine */ .word undiloader /* Offset to loader routine */
.word _data16_size /* Stack segment size */ .word _data16_memsz /* Stack segment size */
.word _data16_size /* Data segment size */ .word _data16_memsz /* Data segment size */
.word _text16_size /* Code segment size */ .word _text16_memsz /* Code segment size */
.ascii "PCIR" /* Bus type */ .ascii "PCIR" /* Bus type */
.equ undiheader_len, . - undiheader .equ undiheader_len, . - undiheader
.size undiheader, . - undiheader .size undiheader, . - undiheader
@ -294,7 +294,7 @@ pmm_scan:
/* Shrink ROM and update checksum */ /* Shrink ROM and update checksum */
xorw %bx, %bx xorw %bx, %bx
xorw %si, %si xorw %si, %si
movw $_prefix_size_sect, %cx movw $_prefix_memsz_sect, %cx
movb %cl, romheader_size movb %cl, romheader_size
shlw $9, %cx shlw $9, %cx
1: lodsb 1: lodsb

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@ -5,15 +5,9 @@
* *
*/ */
OUTPUT_FORMAT ( "elf32-i386", "elf32-i386", "elf32-i386" )
OUTPUT_ARCH ( i386 )
ENTRY ( _entry )
SECTIONS { SECTIONS {
/* All sections in the resulting file have consecutive load /* Each section starts at a virtual address of zero.
* addresses, but may have individual link addresses depending on
* the memory model being used.
* *
* We guarantee alignment of virtual addresses to any alignment * We guarantee alignment of virtual addresses to any alignment
* specified by the constituent object files (e.g. via * specified by the constituent object files (e.g. via
@ -30,163 +24,123 @@ SECTIONS {
* *
*/ */
/*
* Weak symbols that need zero values if not otherwise defined
*/
. = 0;
.weak : AT ( 0 ) {
*(.weak)
}
_assert = ASSERT ( ( . == 0 ), ".weak is non-zero length" );
/* /*
* The prefix * The prefix
*
*/ */
_prefix_link_addr = 0; .prefix 0x0 : AT ( _prefix_lma ) {
. = _prefix_link_addr; _prefix = .;
_prefix = .;
.prefix : AT ( _prefix_load_offset + __prefix ) {
__prefix = .;
_entry = .;
*(.prefix) *(.prefix)
*(.prefix.*) *(.prefix.*)
_eprefix_progbits = .; _mprefix = .;
} .prefix_bss (NOLOAD) : {
_eprefix = .;
} }
_prefix_filesz = ABSOLUTE ( _mprefix - _prefix );
_eprefix = .; _prefix_memsz = ABSOLUTE ( _eprefix - _prefix );
/* /*
* The 16-bit sections, if present * The 16-bit (real-mode) code section
*
*/ */
_text16_link_addr = 0; .text16 0x0 : AT ( _text16_lma ) {
. = _text16_link_addr; _text16 = .;
_text16 = .;
/* We need to allow code at the NULL address in .text16 */
.text16 : AT ( _text16_load_offset + __text16 ) {
__text16 = .;
*(.text16.null) *(.text16.null)
. += 1; /* Prevent NULL being valid */ . += 1; /* Prevent NULL being valid */
*(.text16) *(.text16)
*(.text16.*) *(.text16.*)
_etext16_progbits = .; _mtext16 = .;
} = 0x9090 } .text16_bss (NOLOAD) : {
_etext16 = .;
}
_text16_filesz = ABSOLUTE ( _mtext16 - _text16 );
_text16_memsz = ABSOLUTE ( _etext16 - _text16 );
_etext16 = .; /*
* The 16-bit (real-mode) data section
*
*/
_data16_link_addr = 0; .data16 0x0 : AT ( _data16_lma ) {
. = _data16_link_addr; _data16 = .;
_data16 = .; . += 1; /* Prevent NULL being valid */
. += 1; /* Prevent NULL being valid */
.rodata16 : AT ( _data16_load_offset + __rodata16 ) {
__rodata16 = .;
*(.rodata16) *(.rodata16)
*(.rodata16.*) *(.rodata16.*)
}
.data16 : AT ( _data16_load_offset + __data16 ) {
__data16 = .;
*(.data16) *(.data16)
*(.data16.*) *(.data16.*)
_edata16_progbits = .; _mdata16 = .;
} } .data16_bss (NOLOAD) : {
.bss16 : AT ( _data16_load_offset + __bss16 ) {
__bss16 = .;
_bss16 = .;
*(.bss16) *(.bss16)
*(.bss16.*) *(.bss16.*)
_ebss16 = .;
}
.stack16 : AT ( _data16_load_offset + __stack16 ) {
__stack16 = .;
*(.stack16) *(.stack16)
*(.stack16.*) *(.stack16.*)
_edata16 = .;
} }
_data16_filesz = ABSOLUTE ( _mdata16 - _data16 );
_edata16 = .; _data16_memsz = ABSOLUTE ( _edata16 - _data16 );
/* /*
* The 32-bit sections * The 32-bit sections
*
*/ */
_textdata_link_addr = 0; .textdata 0x0 : AT ( _textdata_lma ) {
. = _textdata_link_addr; _textdata = .;
_textdata = .;
_text = .;
. += 1; /* Prevent NULL being valid */
.text : AT ( _textdata_load_offset + __text ) {
__text = .;
*(.text.null_trap) *(.text.null_trap)
. += 1; /* Prevent NULL being valid */
*(.text) *(.text)
*(.text.*) *(.text.*)
} = 0x9090
_etext = .;
_data = .;
.rodata : AT ( _textdata_load_offset + __rodata ) {
__rodata = .;
*(.rodata) *(.rodata)
*(.rodata.*) *(.rodata.*)
}
.data : AT ( _textdata_load_offset + __data ) {
__data = .;
*(.data) *(.data)
*(.data.*) *(.data.*)
*(SORT(.tbl.*)) /* Various tables. See include/tables.h */ *(SORT(.tbl.*)) /* Various tables. See include/tables.h */
_etextdata_progbits = .; _mtextdata = .;
} } .textdata_bss (NOLOAD) : {
.bss : AT ( _textdata_load_offset + __bss ) {
__bss = .;
_bss = .;
*(.bss) *(.bss)
*(.bss.*) *(.bss.*)
*(COMMON) *(COMMON)
_ebss = .;
}
.stack : AT ( _textdata_load_offset + __stack ) {
__stack = .;
*(.stack) *(.stack)
*(.stack.*) *(.stack.*)
_etextdata = .;
} }
_textdata_filesz = ABSOLUTE ( _mtextdata - _textdata );
_edata = .; _textdata_memsz = ABSOLUTE ( _etextdata - _textdata );
_etextdata = .;
_end = .;
/* /*
* Compressor information block * Compressor information block
*
*/ */
_zinfo_link_addr = 0; .zinfo 0x0 : AT ( _zinfo_lma ) {
. = _zinfo_link_addr; _zinfo = .;
_zinfo = .;
.zinfo : AT ( _zinfo_load_offset + __zinfo ) {
__zinfo = .;
_entry = .;
*(.zinfo) *(.zinfo)
*(.zinfo.*) *(.zinfo.*)
_ezinfo_progbits = .; _mzinfo = .;
} .zinfo_bss (NOLOAD) : {
_ezinfo = .;
} }
_zinfo_filesz = ABSOLUTE ( _mzinfo - _zinfo );
_ezinfo = .; _zinfo_memsz = ABSOLUTE ( _ezinfo - _zinfo );
/*
* Weak symbols that need zero values if not otherwise defined
*
*/
.weak 0x0 : {
_weak = .;
*(.weak)
_eweak = .;
}
_assert = ASSERT ( ( _weak == _eweak ), ".weak is non-zero length" );
/* /*
* Dispose of the comment and note sections to make the link map * Dispose of the comment and note sections to make the link map
* easier to read * easier to read
*
*/ */
/DISCARD/ : { /DISCARD/ : {
@ -195,90 +149,53 @@ SECTIONS {
} }
/* /*
* Load address calculations. The slightly obscure nature of the * Load address calculations. In older versions of ld, ALIGN()
* calculations is because ALIGN(x) can only operate on the * can operate only on the location counter, so we use that.
* location counter. *
*/ */
_max_align = 16; PROVIDE ( _max_align = 16 );
_load_addr = 0; . = 0;
. = _load_addr; _prefix_lma = .;
. += _prefix_filesz;
. = ALIGN ( _max_align );
. -= _prefix_link_addr; _payload_lma = .;
_prefix_load_offset = ALIGN ( _max_align );
_prefix_load_addr = _prefix_link_addr + _prefix_load_offset;
_prefix_size = _eprefix - _prefix;
_prefix_progbits_size = _eprefix_progbits - _prefix;
. = _prefix_load_addr + _prefix_progbits_size;
. -= _text16_link_addr; _text16_lma = .;
_text16_load_offset = ALIGN ( _max_align ); . += _text16_filesz;
_text16_load_addr = _text16_link_addr + _text16_load_offset; . = ALIGN ( _max_align );
_text16_size = _etext16 - _text16;
_text16_progbits_size = _etext16_progbits - _text16;
. = _text16_load_addr + _text16_progbits_size;
. -= _data16_link_addr; _data16_lma = .;
_data16_load_offset = ALIGN ( _max_align ); . += _data16_filesz;
_data16_load_addr = _data16_link_addr + _data16_load_offset; . = ALIGN ( _max_align );
_data16_size = _edata16 - _data16;
_data16_progbits_size = _edata16_progbits - _data16;
. = _data16_load_addr + _data16_progbits_size;
. -= _textdata_link_addr; _textdata_lma = .;
_textdata_load_offset = ALIGN ( _max_align ); . += _textdata_filesz;
_textdata_load_addr = _textdata_link_addr + _textdata_load_offset; . = ALIGN ( _max_align );
_textdata_size = _etextdata - _textdata;
_textdata_progbits_size = _etextdata_progbits - _textdata;
. = _textdata_load_addr + _textdata_progbits_size;
_load_size = . - _load_addr; _filesz = .; /* Do not include zinfo block in file size */
. -= _zinfo_link_addr; _zinfo_lma = .;
_zinfo_load_offset = ALIGN ( _max_align ); . += _zinfo_filesz;
_zinfo_load_addr = _zinfo_link_addr + _zinfo_load_offset; . = ALIGN ( _max_align );
_zinfo_size = _ezinfo - _zinfo;
_zinfo_progbits_size = _ezinfo_progbits - _zinfo;
. = _zinfo_load_addr + _zinfo_progbits_size;
_payload_offset = _text16_load_offset;
/*
* Alignment checks. ALIGN() can only operate on the location
* counter, so we set the location counter to each value we want
* to check.
*/
. = _prefix_load_addr - _prefix_link_addr;
_assert = ASSERT ( ( . == ALIGN ( _max_align ) ),
"_prefix is badly aligned" );
. = _text16_load_addr - _text16_link_addr;
_assert = ASSERT ( ( . == ALIGN ( _max_align ) ),
"_text16 is badly aligned" );
. = _data16_load_addr - _data16_link_addr;
_assert = ASSERT ( ( . == ALIGN ( _max_align ) ),
"_data16 is badly aligned" );
. = _textdata_load_addr - _textdata_link_addr;
_assert = ASSERT ( ( . == ALIGN ( _max_align ) ),
"_text is badly aligned" );
/* /*
* Values calculated to save code from doing it * Values calculated to save code from doing it
*
*/ */
_prefix_size_pgh = ( ( _prefix_size + 15 ) / 16 ); _prefix_memsz_pgh = ( ( _prefix_memsz + 15 ) / 16 );
_prefix_size_sect = ( ( _prefix_size + 511 ) / 512 ); _prefix_memsz_sect = ( ( _prefix_memsz + 511 ) / 512 );
_text16_size_pgh = ( ( _text16_size + 15 ) / 16 ); _text16_memsz_pgh = ( ( _text16_memsz + 15 ) / 16 );
_data16_size_pgh = ( ( _data16_size + 15 ) / 16 ); _data16_memsz_pgh = ( ( _data16_memsz + 15 ) / 16 );
/* /*
* Load sizes in paragraphs and sectors. Note that wherever the * File size in paragraphs and sectors. Note that wherever the
* _load_size variables are used, there must be a corresponding * _filesz variables are used, there must be a corresponding
* .zinfo.fixup section. * .zinfo.fixup section.
*
*/ */
_load_size_pgh = ( ( _load_size + 15 ) / 16 ); _filesz_pgh = ( ( _filesz + 15 ) / 16 );
_load_size_sect = ( ( _load_size + 511 ) / 512 ); _filesz_sect = ( ( _filesz + 511 ) / 512 );
} }