xv6

commit 78a1c79b59a1545fe6105ab3919a05c772c45873
parent 55ca7a8d1176fc6a03d9471870c949dd546ca424
Author: Brian Swetland <swetland@frotz.net>
Date:   Mon, 30 Dec 2013 18:17:54 -0800

trap/vector/irq glue for the 64bit world

Diffstat:
A
kernel/trapasm64.S
 | 
46
++++++++++++++++++++++++++++++++++++++++++++++
A
tools/vectors64.pl
 | 
27
+++++++++++++++++++++++++++

2 files changed, 73 insertions(+), 0 deletions(-)
diff --git a/kernel/trapasm64.S b/kernel/trapasm64.S
@@ -0,0 +1,46 @@
+
+  # vectors.S sends all traps here.
+.globl alltraps
+alltraps:
+  # Build trap frame.
+  push %r15
+  push %r14
+  push %r13
+  push %r12
+  push %r11
+  push %r10
+  push %r9
+  push %r8
+  push %rdi
+  push %rsi
+  push %rbp
+  push %rdx
+  push %rcx
+  push %rbx
+  push %rax
+
+  mov  %rsp, %rdi  # frame in arg1
+  call trap
+
+  # Return falls through to trapret...
+.globl trapret
+trapret:
+  pop %rax
+  pop %rbx
+  pop %rcx
+  pop %rdx
+  pop %rbp
+  pop %rsi
+  pop %rdi
+  pop %r8
+  pop %r9
+  pop %r10
+  pop %r11
+  pop %r12
+  pop %r13
+  pop %r14
+  pop %r15
+
+  # discard trapnum and errorcode
+  add $16, %rsp
+  iretq
diff --git a/tools/vectors64.pl b/tools/vectors64.pl
@@ -0,0 +1,27 @@
+#!/usr/bin/perl -w
+
+# Generate vectors.S, the trap/interrupt entry points.
+# There has to be one entry point per interrupt number
+# since otherwise there's no way for trap() to discover
+# the interrupt number.
+
+print "# generated by vectors.pl - do not edit\n";
+print "# handlers\n";
+print ".globl alltraps\n";
+for(my $i = 0; $i < 256; $i++){
+    print ".globl vector$i\n";
+    print "vector$i:\n";
+    if(!($i == 8 || ($i >= 10 && $i <= 14) || $i == 17)){
+        print "  push \$0\n";
+    }
+    print "  push \$$i\n";
+    print "  jmp alltraps\n";
+}
+
+print "\n# vector table\n";
+print ".data\n";
+print ".globl vectors\n";
+print "vectors:\n";
+for(my $i = 0; $i < 256; $i++){
+    print "  .quad vector$i\n";
+}