From: David Given <dg@cowlark.com>
Date: Tue, 4 Sep 2018 22:00:13 +0000 (+0200)
Subject: Added a boot.o based on the PowerPC one.
X-Git-Url: https://git.ndcode.org/public/gitweb.cgi?a=commitdiff_plain;h=98afb42095350ce59b8f4bf5ea6c521522479216;p=ack.git

Added a boot.o based on the PowerPC one.
---

diff --git a/plat/linuxmips/boot.s b/plat/linuxmips/boot.s
new file mode 100644
index 000000000..cc6d9ce32
--- /dev/null
+++ b/plat/linuxmips/boot.s
@@ -0,0 +1,57 @@
+#
+! Declare segments (the order is important).
+
+.sect .text
+.sect .rom
+.sect .data
+.sect .bss
+
+.sect .text
+
+begtext:
+	! This code is placed at the beginning of the ELF executable and is the
+	! first thing that runs.
+	!
+	! On entry, the stack looks like this:
+	!
+	! sp+...          NULL
+	! sp+8+(4*argc)   env (X quads)
+	! sp+4+(4*argc)   NULL
+	! sp+4            argv (argc quads)
+	! sp              argc
+	!
+	! The ACK actually expects:
+	!
+	! sp+8            argc
+	! sp+4            ptr to argv
+	! sp              ptr to env
+
+	lw r4, 0(sp)             ! r4 = argc
+	addiu r5, sp, 4          ! r5 = argv
+	sll r6, r4, 2            ! r6 = argc*4
+	addu r6, r6, r5          ! r6 = last arg
+	addiu r6, r6, 8          ! r6 = env
+
+	addiu sp, sp, -3 * 4
+	sw r4, 0(sp)
+	sw r5, 0(sp)
+	sw r6, 0(sp)
+
+	b __m_a_i_n
+	nop
+
+! Define symbols at the beginning of our various segments, so that we can find
+! them. (Except .text, which has already been done.)
+
+.sect .data;       begdata:
+.sect .rom;        begrom:
+.sect .bss;        begbss:
+
+! Some magic data. All EM systems need these.
+
+.define _errno
+.comm _errno, 4              ! Posix errno storage
+
+.define .trppc, .ignmask
+.comm .trppc, 4              ! ptr to user trap handler
+.comm .ignmask, 4            ! user trap ignore mask 
diff --git a/plat/linuxmips/build-pkg.lua b/plat/linuxmips/build-pkg.lua
index 6aec05157..8f9a100b2 100644
--- a/plat/linuxmips/build-pkg.lua
+++ b/plat/linuxmips/build-pkg.lua
@@ -1,10 +1,10 @@
 include("plat/build.lua")
 
---ackfile {
---	name = "boot",
---	srcs = { "./boot.s" },
---	vars = { plat = "linuxppc" }
---}
+ackfile {
+	name = "boot",
+	srcs = { "./boot.s" },
+	vars = { plat = "linuxmips" }
+}
 --
 --build_plat_libs {
 --	name = "libs",
@@ -18,7 +18,7 @@ installable {
 		"+tools",
 --		"+libs",
 		"./include+pkg",
---		["$(PLATIND)/linuxppc/boot.o"] = "+boot",
+		["$(PLATIND)/linuxmips/boot.o"] = "+boot",
 --       ["$(PLATIND)/linuxppc/libsys.a"] = "./libsys+lib",
 	}
 }