From a4eef728064cfc3f14396d0ad91f105f12ef32ea Mon Sep 17 00:00:00 2001
From: Jacob McDonnell <jacob@jacobmcdonnell.com>
Date: Sun, 8 Jun 2025 15:03:33 -0400
Subject: Initial Commit

---
 linker.ld | 68 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)
 create mode 100644 linker.ld

(limited to 'linker.ld')

diff --git a/linker.ld b/linker.ld
new file mode 100644
index 0000000..3b35556
--- /dev/null
+++ b/linker.ld
@@ -0,0 +1,68 @@
+/* Tell the linker that we want an x86_64 ELF64 output file */
+OUTPUT_FORMAT(elf64-x86-64)
+
+/* We want the symbol kmain to be our entry point */
+ENTRY(KernelMain)
+
+/* Define the program headers we want so the bootloader gives us the right */
+/* MMU permissions; this also allows us to exert more control over the linking */
+/* process. */
+PHDRS
+{
+    limine_requests PT_LOAD;
+    text PT_LOAD;
+    rodata PT_LOAD;
+    data PT_LOAD;
+}
+
+SECTIONS
+{
+    /* We want to be placed in the topmost 2GiB of the address space, for optimisations */
+    /* and because that is what the Limine spec mandates. */
+    /* Any address in this region will do, but often 0xffffffff80000000 is chosen as */
+    /* that is the beginning of the region. */
+    . = 0xffffffff80000000;
+
+    /* Define a section to contain the Limine requests and assign it to its own PHDR */
+    .limine_requests : {
+        KEEP(*(.limine_requests_start))
+        KEEP(*(.limine_requests))
+        KEEP(*(.limine_requests_end))
+    } :limine_requests
+
+    /* Move to the next memory page for .text */
+    . = ALIGN(CONSTANT(MAXPAGESIZE));
+
+    .text : {
+        *(.text .text.*)
+    } :text
+
+    /* Move to the next memory page for .rodata */
+    . = ALIGN(CONSTANT(MAXPAGESIZE));
+
+    .rodata : {
+        *(.rodata .rodata.*)
+    } :rodata
+
+    /* Move to the next memory page for .data */
+    . = ALIGN(CONSTANT(MAXPAGESIZE));
+
+    .data : {
+        *(.data .data.*)
+    } :data
+
+    /* NOTE: .bss needs to be the last thing mapped to :data, otherwise lots of */
+    /* unnecessary zeros will be written to the binary. */
+    /* If you need, for example, .init_array and .fini_array, those should be placed */
+    /* above this. */
+    .bss : {
+        *(.bss .bss.*)
+        *(COMMON)
+    } :data
+
+    /* Discard .note.* and .eh_frame* since they may cause issues on some hosts. */
+    /DISCARD/ : {
+        *(.eh_frame*)
+        *(.note .note.*)
+    }
+}
-- 
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