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| author | stefan <stefan@s00.xyz> | 2023-03-31 18:41:36 -0400 |
|---|---|---|
| committer | stefan <stefan@s00.xyz> | 2023-03-31 18:41:36 -0400 |
| commit | 598b964ee3c1fab162bfc85fa3725501ab238881 (patch) | |
| tree | 4f6129b1fce2b6b6705ffb465b830c3a3e6953b4 | |
| parent | 13726e79ad71d4620b5bbc60c6ff2f3527de84ce (diff) | |
| download | sv-598b964ee3c1fab162bfc85fa3725501ab238881.tar.gz | |
entry.s and kernel.ld
| -rw-r--r-- | kernel/boot/entry.S | 36 | ||||
| -rw-r--r-- | kernel/lds/kernel.ld | 47 |
2 files changed, 83 insertions, 0 deletions
diff --git a/kernel/boot/entry.S b/kernel/boot/entry.S new file mode 100644 index 0000000..4c977a3 --- /dev/null +++ b/kernel/boot/entry.S @@ -0,0 +1,36 @@ +.section .text.init + +.globl _start +_start: + csrw satp, zero + csrw sie, zero + csrw sip, zero + + .option push + .option norelax + la gp, __global_pointer$ + .option pop + + la sp, __stack_start + mv t0, a0 + li t1, PAGE_SIZE + mul t0, t0, t1 + add sp, sp, t0 + + li a2, 1 + lla a3, _boot_hart + amoswap.w, a3, a2, (a3) + bnez a3, mp_entry + + la a2, __bss_start + la a3, __bss_end +1: + sd zero, (a2) + addi a2, a2, __SIZEOF_POINTER__ + blt a2, a3, 1b + + call boot + +_boot_hart: + .dword 0 + diff --git a/kernel/lds/kernel.ld b/kernel/lds/kernel.ld new file mode 100644 index 0000000..052aa32 --- /dev/null +++ b/kernel/lds/kernel.ld @@ -0,0 +1,47 @@ +OUTPUT_ARCH(riscv) +ENTRY(_start) + +SECTIONS +{ + . = LOAD_ADDR; + . = ALIGN(PAGE_SIZE); + + .text : + { + provide(__text_start = .); + *(.text.init) + *(.text .text.*) + . = ALIGN(8); + PROVIDE(__text_end = .); + } + . = ALIGN(PAGE_SIZE); + + PROVIDE(__global_pointer$ = .); + + .rodata : + { + PROVIDE(__rodata_start = .); + *(.rodata .rodata.*) + . = ALIGN(8); + PROVIDE(__rodata_end = .); + } + + . = ALIGN(PAGE_SIZE); + + .data : + { + PROVIDE(__data_start = .); + *(.sdata .sdata.*) + *(.data .data.*) + *(.readmostly.data) + *(*.data) + . = ALIGN(8); + PROVIDE(__data_end = .); + } + + . = ALIGN(PAGE_SIZE); + + PROVIDE(__stack_start = .); + PROVIDE(__stack_end = __stack_start + (PAGE_SIZE * NPROC)); + PROVIDE(__heap_start = __stack_end); +} |