From 5db066eb5184cc45e7634838b5b0b8c67cb2ae25 Mon Sep 17 00:00:00 2001
From: Danny Holman <dholman@gymli.org>
Date: Wed, 5 Jun 2024 13:47:01 -0500
Subject: libc: create a skeleton libc and build targets

Create build targets for a skeleton libc that only includes enough
functionality to get a cross compiler running.

Signed-off-by: Danny Holman <dholman@gymli.org>
---
 libc/arch/i386/crti.s               | 14 +++++++++++++
 libc/arch/i386/crtn.s               |  7 +++++++
 libc/arch/i386/include/bits/types.h | 41 +++++++++++++++++++++++++++++++++++++
 libc/arch/i386/make.config          |  6 ++++++
 4 files changed, 68 insertions(+)
 create mode 100644 libc/arch/i386/crti.s
 create mode 100644 libc/arch/i386/crtn.s
 create mode 100644 libc/arch/i386/include/bits/types.h
 create mode 100644 libc/arch/i386/make.config

(limited to 'libc/arch/i386')

diff --git a/libc/arch/i386/crti.s b/libc/arch/i386/crti.s
new file mode 100644
index 0000000..906414b
--- /dev/null
+++ b/libc/arch/i386/crti.s
@@ -0,0 +1,14 @@
+.section .init
+
+.global _init
+.type _init, @function
+_init:
+        pushl %ebp
+        movl %esp, %ebp
+
+.section .fini
+
+.global _fini
+_fini:
+        pushl %ebp
+        movl %esp, %ebp
diff --git a/libc/arch/i386/crtn.s b/libc/arch/i386/crtn.s
new file mode 100644
index 0000000..447afb1
--- /dev/null
+++ b/libc/arch/i386/crtn.s
@@ -0,0 +1,7 @@
+.section .init
+        popl %ebp
+        ret
+
+.section .fini
+        popl %ebp
+        ret
diff --git a/libc/arch/i386/include/bits/types.h b/libc/arch/i386/include/bits/types.h
new file mode 100644
index 0000000..99946ff
--- /dev/null
+++ b/libc/arch/i386/include/bits/types.h
@@ -0,0 +1,41 @@
+#ifndef BITS_TYPES_H
+
+typedef unsigned char           __u_char;
+typedef unsigned short          __u_short;
+typedef unsigned int            __u_int;
+typedef unsigned long           __u_long;
+
+typedef signed char             __int8_t;
+typedef signed short int        __int16_t;
+typedef signed int              __int32_t;
+typedef signed long             __int64_t;
+
+typedef unsigned char           __uint8_t;
+typedef unsigned short int      __uint16_t;
+typedef unsigned int            __uint32_t;
+typedef unsigned long           __uint64_t;
+
+typedef __int8_t                __int_least8_t;
+typedef __int16_t               __int_least16_t;
+typedef __int32_t               __int_least32_t;
+typedef __int64_t               __int_least64_t;
+
+typedef __uint8_t               __uint_least8_t;
+typedef __uint16_t              __uint_least16_t;
+typedef __uint32_t              __uint_least32_t;
+typedef __uint64_t              __uint_least64_t;
+
+typedef __int8_t                int8_t;
+typedef __int16_t               int16_t;
+typedef __int32_t               int32_t;
+typedef __int64_t               int64_t;
+
+typedef __uint8_t               uint8_t;
+typedef __uint16_t              uint16_t;
+typedef __uint32_t              uint32_t;
+typedef __uint64_t              uint64_t;
+
+typedef __int32_t               intptr_t;
+typedef __uint32_t              uintptr_t;
+
+#endif
diff --git a/libc/arch/i386/make.config b/libc/arch/i386/make.config
new file mode 100644
index 0000000..25c1254
--- /dev/null
+++ b/libc/arch/i386/make.config
@@ -0,0 +1,6 @@
+LIBC_ARCH_INCLUDE=$(ARCHDIR)/include
+LIBC_ARCH_CFLAGS=-I$(LIBC_ARCH_INCLUDE)
+LIBC_ARCH_LDFLAGS=
+LIBC_ARCH_LIBS=
+
+LIBC_ARCH_OBJS=
-- 
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