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Revise a few comments.

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This commit is contained in:
Robert Nordier 1998-11-02 17:53:08 +00:00
parent 3c0efe5da1
commit 3d04f230e5
2 changed files with 14 additions and 14 deletions
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14
sys/boot/i386/btx/btx/btx.S
View File

@ -13,7 +13,7 @@
# purpose.
#
# $Id: btx.s,v 1.6 1998/10/04 21:14:33 rnordier Exp $
# $Id: btx.s,v 1.7 1998/11/01 13:52:52 rnordier Exp $
#
# Memory layout.
@ -340,7 +340,7 @@ intx00: pushb $0x0 # Int 0x0: #DE
intx10: pushb $0x10 # Int 0x10: #MF
jmp ex_noc # Floating-point error
#
#
# Handle #GP exception.
#
ex_v86: testb $0x2,0x12(%esp,1) # V86 mode?
jz except # No
@ -459,7 +459,7 @@ v86mon.1: lodsb # Get opcode
v86mon.2: cmpb $0xf4,%al # HLT?
jne v86mon.3 # No
cmpl $inthlt+0x1,%esi # Is inthlt?
jne v86mon.6 # No
jne v86mon.6 # No (ignore)
jmp intrtn # Return to user mode
v86mon.3: cmpb $0xfa,%al # CLI?
je v86cli # Yes
@ -693,12 +693,12 @@ intusr.4: shrl $0x4,%eax # Gives segment
xchgl %eax,%ebp # Get int no/address
testb $0x1,%dl # Address?
jnz intusr.5 # Yes
shll $0x2,%eax # XXX Scale
shll $0x2,%eax # Scale
movl (%eax),%eax # Load int vector
intusr.5: movl %eax,%ecx # XXX Save
intusr.5: movl %eax,%ecx # Save
shrl $0x10,%eax # Gives segment
stosl # Set CS
movw %cx,%ax # XXX Restore
movw %cx,%ax # Restore
stosl # Set EIP
leal 0x10(%esp,1),%esp # Discard seg regs
popa # Restore
@ -755,7 +755,7 @@ dump.1: testb $DMP_X32,%ch # Dump long?
dump.2: testb $DMP_MEM,%ch # Dump memory?
jz dump.8 # No
pushl %ds # Save
testb $0x2,0x52(%ebx) # XXX V86 mode?
testb $0x2,0x52(%ebx) # V86 mode?
jnz dump.3 # Yes
verrl 0x4(%esi) # Readable selector?
jnz dump.3 # No

14
sys/boot/i386/btx/btx/btx.s
View File

@ -13,7 +13,7 @@
# purpose.
#
# $Id: btx.s,v 1.6 1998/10/04 21:14:33 rnordier Exp $
# $Id: btx.s,v 1.7 1998/11/01 13:52:52 rnordier Exp $
#
# Memory layout.
@ -340,7 +340,7 @@ intx00: pushb $0x0 # Int 0x0: #DE
intx10: pushb $0x10 # Int 0x10: #MF
jmp ex_noc # Floating-point error
#
#
# Handle #GP exception.
#
ex_v86: testb $0x2,0x12(%esp,1) # V86 mode?
jz except # No
@ -459,7 +459,7 @@ v86mon.1: lodsb # Get opcode
v86mon.2: cmpb $0xf4,%al # HLT?
jne v86mon.3 # No
cmpl $inthlt+0x1,%esi # Is inthlt?
jne v86mon.6 # No
jne v86mon.6 # No (ignore)
jmp intrtn # Return to user mode
v86mon.3: cmpb $0xfa,%al # CLI?
je v86cli # Yes
@ -693,12 +693,12 @@ intusr.4: shrl $0x4,%eax # Gives segment
xchgl %eax,%ebp # Get int no/address
testb $0x1,%dl # Address?
jnz intusr.5 # Yes
shll $0x2,%eax # XXX Scale
shll $0x2,%eax # Scale
movl (%eax),%eax # Load int vector
intusr.5: movl %eax,%ecx # XXX Save
intusr.5: movl %eax,%ecx # Save
shrl $0x10,%eax # Gives segment
stosl # Set CS
movw %cx,%ax # XXX Restore
movw %cx,%ax # Restore
stosl # Set EIP
leal 0x10(%esp,1),%esp # Discard seg regs
popa # Restore
@ -755,7 +755,7 @@ dump.1: testb $DMP_X32,%ch # Dump long?
dump.2: testb $DMP_MEM,%ch # Dump memory?
jz dump.8 # No
pushl %ds # Save
testb $0x2,0x52(%ebx) # XXX V86 mode?
testb $0x2,0x52(%ebx) # V86 mode?
jnz dump.3 # Yes
verrl 0x4(%esi) # Readable selector?
jnz dump.3 # No