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https://github.com/ibm-s390-linux/s390-tools.git
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19f747847f
Use C pre-processor for linker script generation and refactor some constants. This allows the usage of the constants in our "linker scripts" `*.lds.S` (actually, these are assembler files, so we can make us of the C pre-processor and its capabilities). While at it, enforce the described memory layout in the generated linker script. Reviewed-by: Stefan Haberland <sth@linux.ibm.com> Reviewed-by: Philipp Rudo <prudo@linux.ibm.com> Signed-off-by: Marc Hartmayer <mhartmay@linux.ibm.com> Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
63 lines
1.3 KiB
ArmAsm
63 lines
1.3 KiB
ArmAsm
/*
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* Memory layout for stage 3
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* =========================
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*
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* General memory layout
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* ---------------------
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*
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* 0x0000-0x1fff Lowcore
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* 0x2000-0x5fff Memory allocation (heap)
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* 0x6000-0x8fff free
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* 0x9000-0x9fff Stage3 parameter
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* 0xa000-0xdfff Stage3 code + data
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* 0xf000-0xffff Stack
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*/
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#include "boot/loaders_layout.h"
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SECTIONS
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{
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. = 0x0;
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. = STAGE3_HEAP_ADDRESS;
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__heap_start = .;
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.heap : {
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. += STAGE3_HEAP_SIZE;
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ASSERT(__heap_stop - __heap_start == STAGE3_HEAP_SIZE,
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"Heap section doesn't conform to the described memory layout");
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}
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__heap_stop = .;
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/* stage 3 parameter */
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. = STAGE3_PARAMS_ADDRESS;
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_stage3_parms = .;
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. = STAGE3_ENTRY;
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.text.start : { *(.text.start) }
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.text : { *(.text) }
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__ex_table_start = .;
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.ex_table : { *(.ex_table) }
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__ex_table_stop = .;
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.eh_frame : { *(.eh_frame) }
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__bss_start = .;
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.bss : { *(.bss) }
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__bss_stop = .;
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.rodata : {*(.rodata) }
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.data : { *(.data) }
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. = COMMAND_LINE_EXTRA;
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.cmdline_extra : {
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. += COMMAND_LINE_EXTRA_SIZE;
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}
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. = STAGE3_STACK_ADDRESS;
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__stack_start = .;
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.stack : {
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. += STAGE3_STACK_SIZE;
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ASSERT(__stack_end - __stack_start == STAGE3_STACK_SIZE,
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"Stack section doesn't conform to the described memory layout");
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}
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__stack_end = .;
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}
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