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kernel.ld: slight rewrite, use memory regions for ram instead of static offset

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Imbus 2025-09-06 00:54:38 +02:00
parent 6f5746a805
commit 57be90da84
1 changed files with 11 additions and 10 deletions
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21
kern/kernel.ld
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@ -1,14 +1,13 @@
OUTPUT_ARCH( "riscv" ) OUTPUT_ARCH( "riscv" )
ENTRY( _entry ) /* See: entry.S */ ENTRY( _entry ) /* See: entry.S */
MEMORY
{
RAM (rwx) : ORIGIN = 0x80000000, LENGTH = 128M
}
SECTIONS SECTIONS
{ {
/*
* ensure that entry.S / _entry is at 0x80000000,
* where qemu's -kernel jumps.
*/
. = 0x80000000;
/* /*
* This section contains the code. This is, the machine language instructions * This section contains the code. This is, the machine language instructions
* that will be executed by the processor. In here we will find symbols * that will be executed by the processor. In here we will find symbols
@ -35,7 +34,7 @@ SECTIONS
/* Define symbol etext to be the current location. */ /* Define symbol etext to be the current location. */
PROVIDE(etext = .); PROVIDE(etext = .);
} :text } > RAM :text
/* /*
* This contains any data that is marked as read only. * This contains any data that is marked as read only.
@ -47,7 +46,7 @@ SECTIONS
*(.srodata*) /* do not need to distinguish this from .rodata */ *(.srodata*) /* do not need to distinguish this from .rodata */
. = ALIGN(16); . = ALIGN(16);
*(.rodata*) *(.rodata*)
} } > RAM
/* /*
* This section contains initialized global and static variables. * This section contains initialized global and static variables.
@ -58,7 +57,7 @@ SECTIONS
*(.sdata*) /* do not need to distinguish this from .data */ *(.sdata*) /* do not need to distinguish this from .data */
. = ALIGN(16); . = ALIGN(16);
*(.data*) *(.data*)
} } > RAM
/* /*
* Contains all uninitialized global and static var iables. These are usually * Contains all uninitialized global and static var iables. These are usually
@ -71,10 +70,12 @@ SECTIONS
*(.sbss*) /* do not need to distinguish this from .bss */ *(.sbss*) /* do not need to distinguish this from .bss */
. = ALIGN(16); . = ALIGN(16);
*(.bss*) *(.bss*)
} } > RAM
/* Define symbol end as current location, note that this is not aligned, see vm.c */ /* Define symbol end as current location, note that this is not aligned, see vm.c */
PROVIDE(kernel_end = .); PROVIDE(kernel_end = .);
PROVIDE(__heap_start = ALIGN(32));
PROVIDE(__heap_end = ORIGIN(RAM) + LENGTH(RAM));
} }
PHDRS { PHDRS {