61 lines
1.6 KiB
Plaintext
61 lines
1.6 KiB
Plaintext
OUTPUT_ARCH(riscv)
|
|
|
|
/* The kernel runs in the upper half: linked at its physical load address
|
|
plus PHYS_OFFSET (mmu::PHYS_OFFSET), loaded at the physical address.
|
|
Firmware jumps to the physical entry with the MMU off; _start switches
|
|
to the high mapping before any Rust code runs. */
|
|
PHYS_OFFSET = 0xFFFFFFC000000000;
|
|
LOAD_ADDRESS = 0x80200000;
|
|
ENTRY(_start_phys)
|
|
|
|
/* Every boundary below is page aligned: the kernel maps each range with
|
|
its own permissions (W^X), see mmu::init_kernel_page_table. */
|
|
SECTIONS {
|
|
. = PHYS_OFFSET + LOAD_ADDRESS;
|
|
_text_start = .;
|
|
|
|
.text : AT(ADDR(.text) - PHYS_OFFSET) {
|
|
*(.text.entry)
|
|
*(.text .text.*)
|
|
}
|
|
|
|
. = ALIGN(4096);
|
|
_text_end = .;
|
|
|
|
.rodata : AT(ADDR(.rodata) - PHYS_OFFSET) {
|
|
*(.rodata .rodata.*)
|
|
*(.srodata .srodata.*)
|
|
}
|
|
.eh_frame : AT(ADDR(.eh_frame) - PHYS_OFFSET) {
|
|
*(.eh_frame)
|
|
}
|
|
|
|
. = ALIGN(4096);
|
|
_rodata_end = .;
|
|
|
|
.data : AT(ADDR(.data) - PHYS_OFFSET) {
|
|
*(.data .data.*)
|
|
*(.sdata .sdata.*)
|
|
}
|
|
|
|
. = ALIGN(4096);
|
|
.bss : AT(ADDR(.bss) - PHYS_OFFSET) {
|
|
_bss_start = .;
|
|
*(.bss .bss.*)
|
|
*(.sbss .sbss.*)
|
|
_bss_end = .;
|
|
}
|
|
|
|
/* One kernel stack per hart (smp::MAX_HARTS, smp::STACK_SLOT): each
|
|
slot is an unmapped guard page, so overflowing a stack faults
|
|
instead of silently overwriting what lies below, then the stack. */
|
|
. = ALIGN(4096);
|
|
_stacks_start = .;
|
|
. += 8 * (4096 + 0x80000);
|
|
_stacks_end = .;
|
|
|
|
_heap_start = .;
|
|
}
|
|
|
|
_start_phys = _start - PHYS_OFFSET;
|