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gdb.sh: start gdb with useful facilities

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This commit is contained in:
Giacomo Tesio
2017-01-19 19:31:07 +01:00
parent 8649dcc9b6
commit a14a0f9224
5 changed files with 169 additions and 290 deletions
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112
_gdb/functions Normal file
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@@ -0,0 +1,112 @@
# This file is part of Jehanne.
#
# Copyright (C) 2016-2017 Giacomo Tesio <giacomo@tesio.it>
set $__pendingUserBreak = 0
define jhn-print-with-context
if up != 0
printf "%s %d ", up->text, up->pid
end
if m != 0
printf "(mach %d) ", m->machno
end
if $argc == 1
p $arg0
end
if $argc == 2
printf $arg0, $arg1
end
if $argc == 3
printf $arg0, $arg1, $arg2
end
if $argc == 4
printf $arg0, $arg1, $arg2, $arg3
end
printf "\n"
end
define jhn-log-syscalls
b syscall
commands
jhn-print-with-context " pc = 0x%x " ureg->ip
c
end
end
define jhn-break-errors
b errorl
commands
jhn-print-with-context
bt 4
c
end
end
define jhn-break-cmd
if $argc < 2 || $argc > 3
printf "usage: jhn-break-cmd symbol/path \"programName\" [address]\n"
else
if $__pendingUserBreak > 0
printf "jhn-break-cmd: cannot set a new breakpoint in user space until the previous one is recorded at\n "
info line *$__breakAddr
else
add-symbol-file $arg0 0x4000c0
set __onExecFaultBreakForCMD = $arg1
set $__breakAddr = (uintptr_t)0x4000c0
set $__breakPageStart = (uintptr_t)0x400000
set $__breakPageEnd = (uintptr_t)0x401000
if $argc == 3
set $__breakAddr = (uintptr_t)$arg2
set $__breakPageStart = (uintptr_t)($__breakAddr & ~(0x1000-1))
set $__breakPageEnd = (uintptr_t)($__breakAddr + 0x1000)
end
b *peekAtExecFaults+114 if addr >= $__breakPageStart && addr < $__breakPageEnd
set $__pendingUserBreak = $bpnum
commands
d $__pendingUserBreak
set $__pendingUserBreak = 0
b *$__breakAddr
c
end
end
end
end
define jhn-break-pid
if $argc < 2 || $argc > 3
printf "usage: jhn-break-pid symbol/path pid [address]\n"
else
if $__pendingUserBreak > 0
printf "jhn-break-pid: cannot set a new breakpoint in user space until the previous one is recorded at\n "
info line *$__breakAddr
else
add-symbol-file $arg0 0x4000c0
set __onExecFaultBreakForPID = $arg1
set $__breakAddr = (uintptr_t)0x4000c0
set $__breakPageStart = (uintptr_t)0x400000
set $__breakPageEnd = (uintptr_t)0x401000
if $argc == 3
set $__breakAddr = (uintptr_t)$arg2
set $__breakPageStart = (uintptr_t)($__breakAddr & ~(0x1000-1))
set $__breakPageEnd = (uintptr_t)($__breakAddr + 0x1000)
end
b *peekAtExecFaults+64 if addr >= $__breakPageStart && addr < $__breakPageEnd
set $__pendingUserBreak = $bpnum
commands
d $__pendingUserBreak
set $__pendingUserBreak = 0
b *$__breakAddr
c
end
end
end
end
define jhn-connect
target remote :1234
printf "connected to QEMU\n"
if $pc == waitdebugger+22
set var c = 1
end
end