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Code Issues Releases Activity

Add support for trace traps by returning from them just as for breakpoint

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traps rather than halting.  Ideally, we should avoid printing the
'BTX halted' message for debug register dumps.
This commit is contained in:
John Baldwin 2001-11-03 21:42:25 +00:00
parent 25895accd8
commit 5eef06c222
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=85990
2 changed files with 10 additions and 2 deletions
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6
sys/boot/i386/btx/btx/btx.S
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@ -408,7 +408,11 @@ except.2: push $SEL_SDATA # Set up
popl %ds # saved popl %ds # saved
cmpb $0x3,(%esp,1) # Breakpoint? cmpb $0x3,(%esp,1) # Breakpoint?
je except.3 # Yes je except.3 # Yes
jmp exit # Exit cmpb $0x1,(%esp,1) # Debug?
jne except.2a # No
testl $0x100,0x10(%esp,1) # Trap flag set?
jnz except.3 # Yes
except.2a: jmp exit # Exit
except.3: leal 0x8(%esp,1),%esp # Discard err, int no except.3: leal 0x8(%esp,1),%esp # Discard err, int no
iret # From interrupt iret # From interrupt
# #

6
sys/boot/i386/btx/btx/btx.s
View File

@ -408,7 +408,11 @@ except.2: push $SEL_SDATA # Set up
popl %ds # saved popl %ds # saved
cmpb $0x3,(%esp,1) # Breakpoint? cmpb $0x3,(%esp,1) # Breakpoint?
je except.3 # Yes je except.3 # Yes
jmp exit # Exit cmpb $0x1,(%esp,1) # Debug?
jne except.2a # No
testl $0x100,0x10(%esp,1) # Trap flag set?
jnz except.3 # Yes
except.2a: jmp exit # Exit
except.3: leal 0x8(%esp,1),%esp # Discard err, int no except.3: leal 0x8(%esp,1),%esp # Discard err, int no
iret # From interrupt iret # From interrupt
# #