diff options
Diffstat (limited to 'scripts/qemugdb')
| -rw-r--r-- | scripts/qemugdb/coroutine.py | 56 |
1 files changed, 27 insertions, 29 deletions
diff --git a/scripts/qemugdb/coroutine.py b/scripts/qemugdb/coroutine.py index b1d4546fe6..b5c86787c4 100644 --- a/scripts/qemugdb/coroutine.py +++ b/scripts/qemugdb/coroutine.py @@ -47,8 +47,7 @@ def glibc_ptr_demangle(val, pointer_guard): '''Undo effect of glibc's PTR_MANGLE()''' return gdb.parse_and_eval('(((uint64_t)%s >> 0x11) | ((uint64_t)%s << (64 - 0x11))) ^ (uint64_t)%s' % (val, val, pointer_guard)) -def bt_jmpbuf(jmpbuf): - '''Backtrace a jmpbuf''' +def get_jmpbuf_regs(jmpbuf): JB_RBX = 0 JB_RBP = 1 JB_R12 = 2 @@ -58,35 +57,35 @@ def bt_jmpbuf(jmpbuf): JB_RSP = 6 JB_PC = 7 - old_rbx = gdb.parse_and_eval('(uint64_t)$rbx') - old_rbp = gdb.parse_and_eval('(uint64_t)$rbp') - old_rsp = gdb.parse_and_eval('(uint64_t)$rsp') - old_r12 = gdb.parse_and_eval('(uint64_t)$r12') - old_r13 = gdb.parse_and_eval('(uint64_t)$r13') - old_r14 = gdb.parse_and_eval('(uint64_t)$r14') - old_r15 = gdb.parse_and_eval('(uint64_t)$r15') - old_rip = gdb.parse_and_eval('(uint64_t)$rip') - pointer_guard = get_glibc_pointer_guard() - gdb.execute('set $rbx = %s' % jmpbuf[JB_RBX]) - gdb.execute('set $rbp = %s' % glibc_ptr_demangle(jmpbuf[JB_RBP], pointer_guard)) - gdb.execute('set $rsp = %s' % glibc_ptr_demangle(jmpbuf[JB_RSP], pointer_guard)) - gdb.execute('set $r12 = %s' % jmpbuf[JB_R12]) - gdb.execute('set $r13 = %s' % jmpbuf[JB_R13]) - gdb.execute('set $r14 = %s' % jmpbuf[JB_R14]) - gdb.execute('set $r15 = %s' % jmpbuf[JB_R15]) - gdb.execute('set $rip = %s' % glibc_ptr_demangle(jmpbuf[JB_PC], pointer_guard)) + return {'rbx': jmpbuf[JB_RBX], + 'rbp': glibc_ptr_demangle(jmpbuf[JB_RBP], pointer_guard), + 'rsp': glibc_ptr_demangle(jmpbuf[JB_RSP], pointer_guard), + 'r12': jmpbuf[JB_R12], + 'r13': jmpbuf[JB_R13], + 'r14': jmpbuf[JB_R14], + 'r15': jmpbuf[JB_R15], + 'rip': glibc_ptr_demangle(jmpbuf[JB_PC], pointer_guard) } + +def bt_jmpbuf(jmpbuf): + '''Backtrace a jmpbuf''' + regs = get_jmpbuf_regs(jmpbuf) + old = dict() + + for i in regs: + old[i] = gdb.parse_and_eval('(uint64_t)$%s' % i) + + for i in regs: + gdb.execute('set $%s = %s' % (i, regs[i])) gdb.execute('bt') - gdb.execute('set $rbx = %s' % old_rbx) - gdb.execute('set $rbp = %s' % old_rbp) - gdb.execute('set $rsp = %s' % old_rsp) - gdb.execute('set $r12 = %s' % old_r12) - gdb.execute('set $r13 = %s' % old_r13) - gdb.execute('set $r14 = %s' % old_r14) - gdb.execute('set $r15 = %s' % old_r15) - gdb.execute('set $rip = %s' % old_rip) + for i in regs: + gdb.execute('set $%s = %s' % (i, old[i])) + +def coroutine_to_jmpbuf(co): + coroutine_pointer = co.cast(gdb.lookup_type('CoroutineUContext').pointer()) + return coroutine_pointer['env']['__jmpbuf'] class CoroutineCommand(gdb.Command): @@ -101,5 +100,4 @@ class CoroutineCommand(gdb.Command): gdb.write('usage: qemu coroutine <coroutine-pointer>\n') return - coroutine_pointer = gdb.parse_and_eval(argv[0]).cast(gdb.lookup_type('CoroutineUContext').pointer()) - bt_jmpbuf(coroutine_pointer['env']['__jmpbuf']) + bt_jmpbuf(coroutine_to_jmpbuf(gdb.parse_and_eval(argv[0]))) |