interrupts, timer, keyboard, segments, lots of kernel code

[bootcensus] / src / regs.s

diff --git a/src/regs.s b/src/regs.s
new file mode 100644 (file)
index 0000000..713112e
--- /dev/null
+++ b/src/regs.s
@@ -0,0 +1,54 @@
+       .text
+       .align 4
+
+       .globl get_regs
+get_regs:
+       pushl %ebp
+       movl %esp, %ebp
+
+       pushl %edx
+       movl 8(%ebp), %edx
+
+       movl %eax, (%edx)
+       movl %ebx, 4(%edx)
+       movl %ecx, 8(%edx)
+       
+       # juggle edx
+       movl %edx, %eax
+       popl %edx
+       movl %edx, 12(%eax)
+       pushl %edx
+       movl %eax, %edx
+       
+       # those two are pointless in a function
+       movl %esp, 16(%edx)
+       movl %ebp, 20(%edx)
+
+       movl %esi, 24(%edx)
+       movl %edi, 28(%edx)
+
+       pushf
+       popl %eax
+       movl %eax, 32(%edx)
+
+       movw %cs, 36(%edx)
+       movw %ss, 40(%edx)
+       movw %ds, 44(%edx)
+       movw %es, 48(%edx)
+       movw %fs, 52(%edx)
+       movw %gs, 56(%edx)
+
+       pushl %ebx
+       movl %cr0, %ebx
+       movl %ebx, 60(%edx)
+       #movl %cr1, %ebx
+       #movl %ebx, 64(%edx)
+       movl %cr2, %ebx
+       movl %ebx, 68(%edx)
+       movl %cr3, %ebx
+       movl %ebx, 72(%edx)
+       popl %ebx
+
+       popl %edx
+       popl %ebp
+       ret