379 lines
8.6 KiB
Plaintext
379 lines
8.6 KiB
Plaintext
# $FreeBSD$
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# Assembler-level macros for i386
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# Disassemble the next 10 instructions.
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define xi
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x/10i $eip
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end
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# Top 12 words on stack
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define xs
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x/12x $esp
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end
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# Top 12 words from frame pointer
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define xb
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x/12x $ebp
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end
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# single step through calls and disassemble the next instruction
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define z
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ni
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x/1i $eip
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end
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# single step over calls and disassemble the next instruction
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define zs
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si
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x/1i $eip
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end
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# show current stack frame and first 4 parameters
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define xp
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printf " esp: "
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output/x $esp
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echo (
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output (((int)$ebp)-(int)$esp)/4-4
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printf " words on stack)\n ebp: "
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output/x $ebp
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printf "\n eip: "
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x/1i $eip
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printf "Saved ebp: "
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output/x *(int*)$ebp
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printf " (maximum of "
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output ((*(int*)$ebp)-(int)$ebp)/4-4
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printf " parameters possible)\nSaved eip: "
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x/1i *(int*)($ebp+4)
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printf "\nParm 1 at "
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output/x (int) ($ebp+8)
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printf ": "
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output (char*) *(int*)($ebp+8)
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printf "\nParm 2 at "
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output/x (int) ($ebp+12)
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printf ": "
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output (char*) *(int*)($ebp+12)
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printf "\nParm 3 at "
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output/x (int) ($ebp+16)
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printf ": "
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output (char*) *(int*)($ebp+16)
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printf "\nParm 4 at "
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output/x (int) ($ebp+20)
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printf ": "
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output (char*) *(int*)($ebp+20)
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echo \n
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end
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document xp
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Show the register contents and the first four parameter
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words of the current frame.
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end
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# show current stack frame and first 10 parameters
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define xxp
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printf " esp: "
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output/x $esp
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printf "\n ebp: "
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output/x $ebp
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printf "\n eip: "
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x/1i $eip
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printf "Saved ebp: "
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output/x *(int*)$ebp
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printf " (maximum of "
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output ((*(int*)$ebp)-(int)$ebp)/4-4
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printf " parameters possible)\nSaved eip: "
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x/1i *(int*)($ebp+4)
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printf "\nParm 1 at "
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output/x (int) ($ebp+8)
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printf ": "
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output (char*) *(int*)($ebp+8)
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printf "\nParm 2 at "
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output/x (int) ($ebp+12)
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printf ": "
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output (char*) *(int*)($ebp+12)
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printf "\nParm 3 at "
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output/x (int) ($ebp+16)
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printf ": "
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output (char*) *(int*)($ebp+16)
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printf "\nParm 4 at "
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output/x (int) ($ebp+20)
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printf ": "
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output (char*) *(int*)($ebp+20)
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printf "\nParm 5 at "
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output/x (int) ($ebp+24)
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printf ": "
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output (char*) *(int*)($ebp+24)
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printf "\nParm 6 at "
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output/x (int) ($ebp+28)
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printf ": "
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output (char*) *(int*)($ebp+28)
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printf "\nParm 7 at "
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output/x (int) ($ebp+32)
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printf ": "
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output (char*) *(int*)($ebp+32)
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printf "\nParm 8 at "
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output/x (int) ($ebp+36)
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printf ": "
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output (char*) *(int*)($ebp+36)
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printf "\nParm 9 at "
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output/x (int) ($ebp+40)
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printf ": "
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output (char*) *(int*)($ebp+40)
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printf "\nParm 10 at "
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output/x (int) ($ebp+44)
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printf ": "
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output (char*) *(int*)($ebp+44)
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echo \n
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end
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document xxp
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Show the register contents and the first ten parameter
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words of the current frame.
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end
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# Show first to fifth parameters of current frame as int, int * and char *.
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define xp0
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x/12x *(int*)$esp
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p *(int*)$esp
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p (char*)*$esp
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end
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define xp1
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x/12x *(int*)($ebp+4)
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p *(int*)($ebp+4)
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p (char**)($ebp+4)
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end
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define xp2
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x/12x *(int*)($ebp+8)
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p *(int*)($ebp+8)
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p *(char**)($ebp+8)
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end
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define xp3
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x/12x *(int*)($ebp+12)
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p *(int*)($ebp+12)
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p (char**)($ebp+12)
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end
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define xp4
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x/12x *(int*)($ebp+16)
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p *(int*)($ebp+16)
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p (char**)($ebp+16)
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end
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document xp0
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Show the first parameter of current stack frame in various formats
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end
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document xp1
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Show the second parameter of current stack frame in various formats
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end
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document xp2
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Show the third parameter of current stack frame in various formats
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end
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document xp3
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Show the fourth parameter of current stack frame in various formats
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end
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document xp4
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Show the fifth parameter of current stack frame in various formats
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end
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# Select frame 0 to 5 and show stack information.
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define f0
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f 0
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xp
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end
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define f1
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f 1
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xp
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end
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define f2
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f 2
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xp
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end
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define f3
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f 3
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xp
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end
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define f4
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f 4
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xp
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end
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define f5
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f 5
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xp
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end
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document f0
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Select stack frame 0 and show assembler-level details
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end
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document f1
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Select stack frame 1 and show assembler-level details
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end
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document f2
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Select stack frame 2 and show assembler-level details
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end
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document f3
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Select stack frame 3 and show assembler-level details
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end
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document f4
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Select stack frame 4 and show assembler-level details
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end
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document f5
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Select stack frame 5 and show assembler-level details
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end
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document z
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Single step 1 instruction (over calls) and show next instruction.
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end
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document zs
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Single step 1 instruction (through calls) and show next instruction.
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end
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document xi
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List the next 10 instructions from the current IP value
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end
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document xs
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Show the last 12 words on stack in hex
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end
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document xb
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Show 12 words starting at current BP value in hex
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end
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# pcb <pid>
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# show contents of pcb, currently only i386.
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define pcb
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y
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set $nproc = nprocs
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set $aproc = allproc.lh_first
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set $proc = allproc.lh_first
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while (--$nproc >= 0)
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set $pptr = $proc.p_pptr
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if ($proc->p_pid == $arg0)
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set $pcba = $proc->p_threads.tqh_first->td_pcb
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printf "ip: %08x sp: %08x bp: %08x bx: %08x\n", $pcba->pcb_eip, $pcba->pcb_esp, $pcba->pcb_ebp, $pcba->pcb_ebx
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x/1i $pcba->pcb_eip
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set $nproc = 0
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end
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set $aproc = $proc.p_list.le_next
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if ($aproc == 0 && $nproc > 0)
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set $aproc = zombproc
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end
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set $proc = $aproc
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end
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end
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document pcb
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Show some pcb contents of process whose pid is specified.
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end
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# btr <frame>
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# primitive backtrace. frame is a memory address.
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define btr
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set $frame = $arg0
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set $fno = 0
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while (*(int *) $frame > 0xc0000000)
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set $myebp = *(int *) $frame
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set $myeip = *(int *) ($frame + 4)
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printf " frame %d at %p: ebp %8x, eip ", $fno, $frame, $myebp
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x/1i $myeip
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set $frame = $myebp
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set $fno = $fno + 1
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end
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end
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document btr
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Show a backtrace from the ebp address specified. This can be used to get a backtrace from any stack resident in memory. It's the user's responsiblity to ensure that the address is meaningful.
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end
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# btp <pid>
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# backtrace for process <pid>. Uses btr (machine dependent) to perform the backtrace.
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# may produce nonsense.
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define btp
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y
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set $nproc = nprocs
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set $aproc = allproc.lh_first
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set $proc = allproc.lh_first
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while (--$nproc >= 0)
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if ($proc->p_pid == $arg0)
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btr $proc->p_threads.tqh_first->td_pcb->pcb_ebp
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set $nproc = 0
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else
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set $aproc = $proc.p_list.le_next
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if ($aproc == 0 && $nproc > 0)
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set $aproc = zombproc
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end
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set $proc = $aproc
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end
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end
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end
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document btp
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Show a backtrace for the process whose pid is specified as a parameter.
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end
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# Do backtraces for all processes in the system.
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# Uses btr (machine dependent) to perform the backtrace.
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define btpa
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set $nproc = nprocs
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set $aproc = allproc.lh_first
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set $proc = allproc.lh_first
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printf " pid proc addr uid ppid pgrp flag stat comm wchan\n"
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while (--$nproc >= 0)
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set $pptr = $proc.p_pptr
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if ($pptr == 0)
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set $pptr = $proc
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end
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if ($proc.p_stat)
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printf "%5d %08x %08x %4d %5d %5d %06x %d %-10s ", \
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$proc.p_pid, $aproc, \
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$proc.p_uarea, $proc.p_cred->p_ruid, $pptr->p_pid, \
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$proc.p_pgrp->pg_id, $proc.p_flag, $proc.p_stat, \
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&$proc.p_comm[0]
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if ($proc.p_wchan)
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if ($proc.p_wmesg)
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printf "%s ", $proc.p_wmesg
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end
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printf "%x", $proc.p_wchan
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end
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printf "\n"
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if ($proc->p_flag & 4)
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btr $proc->p_threads.tqh_first->td_pcb->pcb_ebp
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else
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echo (not loaded)\n
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end
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end
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set $aproc = $proc.p_list.le_next
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if ($aproc == 0 && $nproc > 0)
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set $aproc = zombproc
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end
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set $proc = $aproc
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end
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end
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document btpa
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Show backtraces for all processes in the system.
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end
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# Show backtrace for process selected with "defproc"
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define btpp
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btr $myvectorproc->p_threads.tqh_first->td_pcb->pcb_ebp
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end
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document btpp
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Show a backtrace for the process previously selected with 'defproc'.
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end
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# Specific stack fram of process selected with "defproc".
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define fr
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set $fno = 0
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set $searching = 1
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set $frame = $myvectorproc->p_threads.tqh_first->td_pcb->pcb_ebp
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while (($searching == 1) && (*(int *) $frame > 0xc0000000))
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set $myebp = *(int *) $frame
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set $myeip = *(int *) ($frame + 4)
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if ($fno == $arg0)
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printf " frame %d at %p: ebp %8x, eip ", $fno, $frame, $myebp
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x/1i $myeip
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printf "Called from %8x, stack frame at %8x\n", *(int *) ($myebp+4), *(int *) $myebp
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printf "last 20 local variables:\n"
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x/20x ($myebp-80)
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printf "call parameters:\n"
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x/8x ($myebp+8)
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set $searching = 0
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else
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set $frame = $myebp
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set $fno = $fno + 1
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end
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end
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if ($searching == 1)
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echo frame not found\n
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end
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end
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document fr
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Show the frame of the stack of the process previously selected with 'defproc'.
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end
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