From 5d34fa2a489940f19ee6c4728e4b11b6d8ffad01 Mon Sep 17 00:00:00 2001
From: Robert Morris <rtm@csail.mit.edu>
Date: Fri, 31 May 2019 11:45:42 -0400
Subject: -initrd fs.img, ramdisk.c, file system

---
 trapasm.S | 132 --------------------------------------------------------------
 1 file changed, 132 deletions(-)
 delete mode 100644 trapasm.S

(limited to 'trapasm.S')

diff --git a/trapasm.S b/trapasm.S
deleted file mode 100644
index 6b6b567..0000000
--- a/trapasm.S
+++ /dev/null
@@ -1,132 +0,0 @@
-#include "param.h"
-#include "x86.h"	
-#include "mmu.h"
-
-# the offset of cs in trapframe (i.e., tf->cs - tf)
-#define CSOFF  144
-	
-# 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
-
-  cmpw $SEG_KCODE, CSOFF(%rsp)   # compare to saved cs
-  jz 1f 
-  swapgs
-  
-1:mov  %rsp, %rdi  # frame in arg1
-  call trap
-
-# Return falls through to trapret...
-.globl trapret
-trapret:
-  cli
-  cmpw $SEG_KCODE, CSOFF(%rsp)  # compare to saved cs
-  jz 1f
-  swapgs
-
-1: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
-
-  add $16, %rsp  # discard trapnum and errorcode
-  iretq
-
-#PAGEBREAK!
-
-# syscall jumps here after syscall instruction
-.globl sysentry
-sysentry:  # Build syscall frame.
-  // load kernel stack address
-  swapgs
-  movq  %rax, %gs:0  // save %rax in syscallno of cpu entry
-  movq  %rsp, %gs:8  // user sp
-  movq  %gs:16, %rax  // proc entry
-  
-  movq  %ss:0(%rax), %rax // load kstack from proc
-  addq  $(KSTACKSIZE), %rax
-
-  movq  %rax, %rsp
-  movq  %gs:0, %rax  // restore rax
-
-  push %gs:8
-  push %rcx
-  push %r11	
-  push %rax	
-
-  push %rbp
-  push %rbx	
-  push %r12 
-  push %r13
-  push %r14
-  push %r15	
-
-  push %r9
-  push %r8	
-  push %r10
-  push %rdx
-  push %rsi	
-  push %rdi
-	
-  mov  %rsp, %rdi  # frame in arg1
-
-  call syscall
-  # fall through to sysexit
-	
-.globl sysexit
-sysexit:
-  # to make sure we don't get any interrupts on the user stack while in
-  # supervisor mode.  insufficient?  (see vunerability reports for sysret)
-  cli
-	
-  pop %rdi
-  pop %rsi
-  pop %rdx
-  pop %r10
-  pop %r8
-  pop %r9
-
-  pop %r15
-  pop %r14
-  pop %r13
-  pop %r12
-  pop %rbx
-  pop %rbp
-
-  pop %rax
-  pop %r11
-  pop %rcx
-
-  mov (%rsp),%rsp  # switch to the user stack
-  # there are two more values on the stack, but we don't care about them	
-  swapgs	
-
-  sysretq
-
-- 
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