From 6315004f6102dca44c4ba50654a36967b8b9c2a6 Mon Sep 17 00:00:00 2001
From: Rich Felker <dalias@aerifal.cx>
Date: Wed, 11 Jul 2012 04:22:13 -0400
Subject: initial version of mips (o32) port, based on work by Richard
 Pennington (rdp)

basically, this version of the code was obtained by starting with
rdp's work from his ellcc source tree, adapting it to musl's build
system and coding style, auditing the bits headers for discrepencies
with kernel definitions or glibc/LSB ABI or large file issues, fixing
up incompatibility with the old binutils from aboriginal linux, and
adding some new special cases to deal with the oddities of sigaction
and pipe syscall interfaces on mips.

at present, minimal test programs work, but some interfaces are broken
or missing. threaded programs probably will not link.
---
 crt/mips/crt1.s | 25 +++++++++++++++++++++++++
 crt/mips/crti.s | 15 +++++++++++++++
 crt/mips/crtn.s | 13 +++++++++++++
 3 files changed, 53 insertions(+)
 create mode 100644 crt/mips/crt1.s
 create mode 100644 crt/mips/crti.s
 create mode 100644 crt/mips/crtn.s

(limited to 'crt/mips')

diff --git a/crt/mips/crt1.s b/crt/mips/crt1.s
new file mode 100644
index 00000000..bdb7c1a7
--- /dev/null
+++ b/crt/mips/crt1.s
@@ -0,0 +1,25 @@
+.set noreorder
+
+.weak  _init
+.weak  _fini
+.global __start
+.global _start
+__start:
+_start:
+	subu    $fp, $fp, $fp            # Zero the frame pointer.
+	lui     $gp, %hi(_gp)
+	addi    $gp, %lo(_gp)
+	#la      $gp, _gp
+	lw      $4, %call16(main)($gp)   # Get main() ...
+	lw      $5, ($sp)                # Get argc...
+	addu    $6, $sp, 4               # and argv ...
+	lw      $7, %call16(_init)($gp)  # and _init() ...
+	addi    $sp, $sp, -4*6           # Leave space for arguments 0..3, arg4, and arg5.
+	lw      $12, %call16(_fini)($gp) # and _fini() ...
+	sw      $12, 4*4($sp)            # Save arg4.
+	sw      $0, 4*5($sp)             # ldso_fini == NULL
+	lw      $25, %call16(__libc_start_main)($gp)
+	jalr    $25                      # Let's go!
+	nop
+	b       .                        # Never gets here.
+	nop
diff --git a/crt/mips/crti.s b/crt/mips/crti.s
new file mode 100644
index 00000000..cbc6e3e9
--- /dev/null
+++ b/crt/mips/crti.s
@@ -0,0 +1,15 @@
+.set noreorder
+
+.section .init
+.global _init
+_init:
+	subu $sp,$sp,32
+	sw $gp,24($sp)
+	sw $ra,28($sp)
+
+.section .fini
+.global _fini
+_fini:
+	subu $sp,$sp,32
+	sw $gp,24($sp)
+	sw $ra,28($sp)
diff --git a/crt/mips/crtn.s b/crt/mips/crtn.s
new file mode 100644
index 00000000..506a04b7
--- /dev/null
+++ b/crt/mips/crtn.s
@@ -0,0 +1,13 @@
+.set noreorder
+
+.section .init
+	lw $gp,24($sp)
+	lw $ra,28($sp)
+	j $ra
+	addu $sp,$sp,32
+
+.section .fini
+	lw $gp,24($sp)
+	lw $ra,28($sp)
+	j $ra
+	addu $sp,$sp,32
-- 
cgit v1.2.1