user: implement mlibc as the libc, finally.

It's finally done.. Signed-off-by: kaguya <vpshinomiya@protonmail.com>
2026-05-02 03:31:49 -04:00
parent 2fa39ad85a
commit 9a9b91c940
2387 changed files with 152741 additions and 315 deletions
@@ -0,0 +1,30 @@
+.weak __global_pointer$
+.hidden __global_pointer$
+
+.section .text
+.global _start
+_start:
+	# Load gp.
+.option push
+.option norelax
+	lla gp, __global_pointer$
+.option pop
+
+	mv a0, sp
+	la a1, main
+	call __mlibc_entry@plt
+	unimp
+
+# Load gp from .preinit_array since it may be used by the executable's .init_array.
+# We still load it in _start to account for static binaries. This matches glibc's behavior.
+load_gp:
+.option push
+.option norelax
+	lla gp, __global_pointer$
+.option pop
+	ret
+
+.section .preinit_array,"aw"
+	.dword load_gp
+
+.section .note.GNU-stack,"",%progbits
@@ -0,0 +1,30 @@
+.weak __global_pointer$
+.hidden __global_pointer$
+
+.section .text
+.global _start
+_start:
+	# Load gp.
+.option push
+.option norelax
+	lla gp, __global_pointer$
+.option pop
+
+	mv a0, sp
+	la a1, main
+	call __mlibc_entry
+	unimp
+
+# Load gp from .preinit_array since it may be used by the executable's .init_array.
+# We still load it in _start to account for static binaries. This matches glibc's behavior.
+load_gp:
+.option push
+.option norelax
+	lla gp, __global_pointer$
+.option pop
+	ret
+
+.section .preinit_array,"aw"
+	.dword load_gp
+
+.section .note.GNU-stack,"",%progbits
@@ -0,0 +1,14 @@
+.section .init
+.global _init
+_init:
+    addi sp, sp, -16
+    sd ra, 8(sp)
+
+.section .fini
+.global _fini
+.type _fini, @function
+_fini:
+    addi sp, sp, -16
+    sd ra, 8(sp)
+
+.section .note.GNU-stack,"",%progbits
@@ -0,0 +1,9 @@
+.section .init
+    ld ra, 8(sp)
+    addi sp, sp, 16
+
+.section .fini
+    ld ra, 8(sp)
+    addi sp, sp, 16
+
+.section .note.GNU-stack,"",%progbits
@@ -0,0 +1,12 @@
+.section .text
+.global __mlibc_start_thread
+__mlibc_start_thread:
+	ld a0, 0(sp)
+	ld a1, 8(sp)
+	ld a2, 16(sp)
+	addi sp, sp, 16
+	andi sp, sp, -16
+	call __mlibc_enter_thread
+	unimp
+
+.section .note.GNU-stack,"",%progbits