From bd5969fc876a10b18613302db7087ef3c40f18e1 Mon Sep 17 00:00:00 2001
From: Ian Moffett <ian@osmora.org>
Date: Thu, 7 Mar 2024 17:28:00 -0500
Subject: lib: Add mlibc

Signed-off-by: Ian Moffett <ian@osmora.org>
---
 lib/mlibc/sysdeps/linux/x86/crt-src/Scrt1.S | 29 +++++++++++++++++++++++++++++
 lib/mlibc/sysdeps/linux/x86/crt-src/crt1.S  | 18 ++++++++++++++++++
 lib/mlibc/sysdeps/linux/x86/crt-src/crti.S  | 11 +++++++++++
 lib/mlibc/sysdeps/linux/x86/crt-src/crtn.S  |  9 +++++++++
 4 files changed, 67 insertions(+)
 create mode 100644 lib/mlibc/sysdeps/linux/x86/crt-src/Scrt1.S
 create mode 100644 lib/mlibc/sysdeps/linux/x86/crt-src/crt1.S
 create mode 100644 lib/mlibc/sysdeps/linux/x86/crt-src/crti.S
 create mode 100644 lib/mlibc/sysdeps/linux/x86/crt-src/crtn.S

(limited to 'lib/mlibc/sysdeps/linux/x86/crt-src')

diff --git a/lib/mlibc/sysdeps/linux/x86/crt-src/Scrt1.S b/lib/mlibc/sysdeps/linux/x86/crt-src/Scrt1.S
new file mode 100644
index 0000000..a62b127
--- /dev/null
+++ b/lib/mlibc/sysdeps/linux/x86/crt-src/Scrt1.S
@@ -0,0 +1,29 @@
+.section .text
+
+.type __stack_chk_fail_local, %function
+.weak __stack_chk_fail_local
+__stack_chk_fail_local:
+	call __stack_chk_fail@plt
+
+.global _start
+
+.type _start, %function
+.type main, %function
+.type __mlibc_entry, %function
+
+.cfi_startproc
+_start:
+.cfi_undefined eip
+	xor %ebp, %ebp
+	mov %esp, %edi
+	call 1f
+
+1:
+	pop %ebx
+	addl $_GLOBAL_OFFSET_TABLE_+[.-1b], %ebx
+	push main@GOT(%ebx)
+	push %edi
+	call __mlibc_entry@plt
+.cfi_endproc
+
+.section .note.GNU-stack,"",%progbits
diff --git a/lib/mlibc/sysdeps/linux/x86/crt-src/crt1.S b/lib/mlibc/sysdeps/linux/x86/crt-src/crt1.S
new file mode 100644
index 0000000..ed45da3
--- /dev/null
+++ b/lib/mlibc/sysdeps/linux/x86/crt-src/crt1.S
@@ -0,0 +1,18 @@
+.section .text
+.global _start
+
+.type _start, %function
+.type main, %function
+.type __mlibc_entry, %function
+
+.cfi_startproc
+_start:
+.cfi_undefined eip
+	xor %ebp, %ebp
+	mov %esp, %ecx
+	push $main
+	push %ecx
+	call __mlibc_entry
+.cfi_endproc
+
+.section .note.GNU-stack,"",%progbits
diff --git a/lib/mlibc/sysdeps/linux/x86/crt-src/crti.S b/lib/mlibc/sysdeps/linux/x86/crt-src/crti.S
new file mode 100644
index 0000000..e232557
--- /dev/null
+++ b/lib/mlibc/sysdeps/linux/x86/crt-src/crti.S
@@ -0,0 +1,11 @@
+.section .init
+.global _init
+_init:
+	pushl %eax
+
+.section .fini
+.global _fini
+_fini:
+	pushl %eax
+
+.section .note.GNU-stack,"",%progbits
diff --git a/lib/mlibc/sysdeps/linux/x86/crt-src/crtn.S b/lib/mlibc/sysdeps/linux/x86/crt-src/crtn.S
new file mode 100644
index 0000000..d890289
--- /dev/null
+++ b/lib/mlibc/sysdeps/linux/x86/crt-src/crtn.S
@@ -0,0 +1,9 @@
+.section .init
+	popl %eax
+	ret
+
+.section .fini
+	popl %eax
+	ret
+
+.section .note.GNU-stack,"",%progbits
-- 
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