xv6-cs450/trapasm.S

.text
.globl trap
.globl trapret1

.globl alltraps
alltraps:
  /* vectors.S sends all traps here */
  pushl   %ds      # build
  pushl   %es      #  trap
  pushal           #  frame
  movl $16,%eax    # SEG_KDATA << 3
  movw %ax,%ds     #  kernel
  movw %ax,%es     #  segments
  pushl %esp       # pass pointer to this trapframe
  call    trap     #  and call trap()
  addl $4, %esp
  # return falls through to trapret...

  /*
   * a forked process RETs here
   * expects ESP to point to a Trapframe
   */
.globl trapret
trapret:
  popal
  popl %es
  popl %ds
  addl $0x8, %esp /* trapno and errcode */
  iret

.globl forkret1
forkret1:
  movl 4(%esp), %esp
  jmp trapret
spacing fixes: no tabs, 2-space indents (for rtm) 2006-09-06 19:04:06 +02:00			`.text`
New scheduler. Removed cli and sti stack in favor of tracking number of locks held on each CPU and explicit conditionals in spinlock.c. 2006-07-16 03:15:28 +02:00			`.globl trap`
			`.globl trapret1`

			`.globl alltraps`
more or less take traps/interrupts 2006-06-13 17:50:06 +02:00			`alltraps:`
spacing fixes: no tabs, 2-space indents (for rtm) 2006-09-06 19:04:06 +02:00			`/* vectors.S sends all traps here */`
			`pushl %ds # build`
			`pushl %es # trap`
			`pushal # frame`
			`movl $16,%eax # SEG_KDATA << 3`
			`movw %ax,%ds # kernel`
			`movw %ax,%es # segments`
			`pushl %esp # pass pointer to this trapframe`
			`call trap # and call trap()`
			`addl $4, %esp`
			`# return falls through to trapret...`
standardize various * conventions 2006-09-06 19:27:19 +02:00
spacing fixes: no tabs, 2-space indents (for rtm) 2006-09-06 19:04:06 +02:00			`/*`
			`* a forked process RETs here`
			`* expects ESP to point to a Trapframe`
			`*/`
New scheduler. Removed cli and sti stack in favor of tracking number of locks held on each CPU and explicit conditionals in spinlock.c. 2006-07-16 03:15:28 +02:00			`.globl trapret`
import 2006-06-12 17:22:12 +02:00			`trapret:`
spacing fixes: no tabs, 2-space indents (for rtm) 2006-09-06 19:04:06 +02:00			`popal`
			`popl %es`
			`popl %ds`
			`addl $0x8, %esp /* trapno and errcode */`
			`iret`
checkpoint. booting second processor. stack is messed up, but thanks to cliff and plan 9 code, at least boots and gets into C code. 2006-06-22 03:28:57 +02:00
Attempt to clean up newproc somewhat. Also remove all calls to memcpy in favor of memmove, which has defined semantics when the ranges overlap. The fact that memcpy was working in console.c to scroll the screen is not guaranteed by all implementations. 2006-07-16 03:47:40 +02:00			`.globl forkret1`
			`forkret1:`
spacing fixes: no tabs, 2-space indents (for rtm) 2006-09-06 19:04:06 +02:00			`movl 4(%esp), %esp`
			`jmp trapret`
standardize various * conventions 2006-09-06 19:27:19 +02:00