Wed Apr 1 16:30:49 1998 Ian Dall <Ian.Dall@dsto.defence.gov.au>
* ns32k-tdep.c (flip_bytes, ns32k_localcount,
ns32k_get_enter_addr, sign_extend): Restore functions mysteriously
deleted.
* ns32knbsd-nat.c: New (?) file to support fetching and storing
registers on NetBSD hosts.
* nbsd.mh (NATDEPFILES): put ns32knbsd-nat.o instead of
ns32k-nat.o
* ns32km3-nat.c (reg_offset): Get order of floating point
registers correct. Add extra 32382 register offsets.
(REG_ADDRESS): define to point at correct part of thread
state. Use calls to "warning" instead of "message".
* tm-nbsd.h, tm-ns32km3.h (REGISTER_NAMES, NUM_REGS,
REGISTER_BYTES, REGISTER_BYTE): redefine allowing for 32382
fpu registers.
This commit is contained in:
Jason Molenda
parent
775b60dd73
commit
3dcac15f1f
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@ -1,3 +1,24 @@
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Wed Apr 1 16:30:49 1998 Ian Dall <Ian.Dall@dsto.defence.gov.au>
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* ns32k-tdep.c (flip_bytes, ns32k_localcount,
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ns32k_get_enter_addr, sign_extend): Restore functions mysteriously
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deleted.
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* ns32knbsd-nat.c: New (?) file to support fetching and storing
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registers on NetBSD hosts.
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* nbsd.mh (NATDEPFILES): put ns32knbsd-nat.o instead of
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ns32k-nat.o
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* ns32km3-nat.c (reg_offset): Get order of floating point
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registers correct. Add extra 32382 register offsets.
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(REG_ADDRESS): define to point at correct part of thread
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state. Use calls to "warning" instead of "message".
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* tm-nbsd.h, tm-ns32km3.h (REGISTER_NAMES, NUM_REGS,
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REGISTER_BYTES, REGISTER_BYTE): redefine allowing for 32382
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fpu registers.
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Wed Apr 1 13:43:07 1998 Philippe De Muyter <phdm@macqel.be>
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* NEWS: m68k-motorola-sysv host support added.
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@ -1,4 +1,4 @@
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# Host: PC532 running NetBSD
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XM_FILE= xm-nbsd.h
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NAT_FILE= nm-nbsd.h
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NATDEPFILES= fork-child.o infptrace.o inftarg.o corelow.o ns32k-nat.o
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NATDEPFILES= fork-child.o infptrace.o inftarg.o corelow.o ns32knbsd-nat.o
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@ -39,3 +39,41 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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? sigtramp_saved_pc (FRAME) \
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: read_memory_integer ((FRAME)->frame + 4, 4)) \
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)
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/* tm-umax.h assumes a 32082 fpu. We have a 32382 fpu. */
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#undef REGISTER_NAMES
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#undef NUM_REGS
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#undef REGISTER_BYTES
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#undef REGISTER_BYTE
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/* Initializer for an array of names of registers.
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There should be NUM_REGS strings in this initializer. */
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#define REGISTER_NAMES {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
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"f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \
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"sp", "fp", "pc", "ps", \
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"fsr", \
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"l0", "l1", "l2", "l3", "l4", "l5", "l6", "l7", "xx", \
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}
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#define NUM_REGS 29
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/* Total amount of space needed to store our copies of the machine's
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register state, the array `registers'. */
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#define REGISTER_BYTES \
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((NUM_REGS - 4) * REGISTER_RAW_SIZE(R0_REGNUM) \
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+ 8 * REGISTER_RAW_SIZE(LP0_REGNUM))
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/* Index within `registers' of the first byte of the space for
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register N. */
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/* This is a bit yuck. The even numbered double precision floating
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point long registers occupy the same space as the even:odd numbered
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single precision floating point registers, but the extra 32381 fpu
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registers are at the end. Doing it this way is compatable for both
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32081 and 32381 equiped machines. */
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#define REGISTER_BYTE(N) (((N) < LP0_REGNUM? (N)\
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: ((N) - LP0_REGNUM) & 1? (N) - 1 \
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: ((N) - LP0_REGNUM + FP0_REGNUM)) * 4)
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@ -49,3 +49,25 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#define STACK_END_ADDR USRSTACK
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#include "ns32k/tm-umax.h"
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/* tm-umax.h assumes a 32082 fpu. We have a 32382 fpu. */
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#undef REGISTER_NAMES
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#undef NUM_REGS
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#undef REGISTER_BYTES
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/* Initializer for an array of names of registers.
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There should be NUM_REGS strings in this initializer. */
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#define REGISTER_NAMES {"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
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"f0", "f1", "f2", "f3", "f4", "f5", "f6", "f7", \
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"sp", "fp", "pc", "ps", \
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"fsr", \
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"l0", "l1", "l2", "l3", "l4", "l5", "l6", "l7", "xx", \
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}
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#define NUM_REGS 29
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/* Total amount of space needed to store our copies of the machine's
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register state, the array `registers'. */
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#define REGISTER_BYTES \
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((NUM_REGS - 4) * REGISTER_RAW_SIZE(R0_REGNUM) \
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+ 8 * REGISTER_RAW_SIZE(LP0_REGNUM))
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@ -25,3 +25,87 @@ _initialize_ns32k_tdep ()
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{
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tm_print_insn = print_insn_ns32k;
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}
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sign_extend (value, bits)
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{
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value = value & ((1 << bits) - 1);
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return (value & (1 << (bits-1))
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? value | (~((1 << bits) - 1))
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: value);
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}
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void
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flip_bytes (ptr, count)
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char *ptr;
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int count;
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{
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char tmp;
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while (count > 0)
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{
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tmp = *ptr;
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ptr[0] = ptr[count-1];
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ptr[count-1] = tmp;
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ptr++;
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count -= 2;
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}
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}
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/* Return the number of locals in the current frame given a pc
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pointing to the enter instruction. This is used in the macro
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FRAME_FIND_SAVED_REGS. */
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int
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ns32k_localcount (enter_pc)
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CORE_ADDR enter_pc;
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{
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unsigned char localtype;
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int localcount;
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localtype = read_memory_integer (enter_pc+2, 1);
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if ((localtype & 0x80) == 0)
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localcount = localtype;
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else if ((localtype & 0xc0) == 0x80)
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localcount = (((localtype & 0x3f) << 8)
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| (read_memory_integer (enter_pc+3, 1) & 0xff));
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else
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localcount = (((localtype & 0x3f) << 24)
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| ((read_memory_integer (enter_pc+3, 1) & 0xff) << 16)
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| ((read_memory_integer (enter_pc+4, 1) & 0xff) << 8 )
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| (read_memory_integer (enter_pc+5, 1) & 0xff));
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return localcount;
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}
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/*
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* Get the address of the enter opcode for the function
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* containing PC, if there is an enter for the function,
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* and if the pc is between the enter and exit.
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* Returns positive address if pc is between enter/exit,
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* 1 if pc before enter or after exit, 0 otherwise.
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*/
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CORE_ADDR
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ns32k_get_enter_addr (pc)
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CORE_ADDR pc;
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{
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CORE_ADDR enter_addr;
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unsigned char op;
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if (pc == 0)
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return 0;
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if (ABOUT_TO_RETURN (pc))
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return 1; /* after exit */
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enter_addr = get_pc_function_start (pc);
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if (pc == enter_addr)
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return 1; /* before enter */
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op = read_memory_integer (enter_addr, 1);
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if (op != 0x82)
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return 0; /* function has no enter/exit */
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return enter_addr; /* pc is between enter and exit */
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}
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@ -46,14 +46,16 @@ static int reg_offset[] =
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{
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REG_N_OFFSET(r0), REG_N_OFFSET(r1), REG_N_OFFSET(r2), REG_N_OFFSET(r3),
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REG_N_OFFSET(r4), REG_N_OFFSET(r5), REG_N_OFFSET(r6), REG_N_OFFSET(r7),
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REG_F_OFFSET(l0a), REG_F_OFFSET(l1a),REG_F_OFFSET(l2a),REG_F_OFFSET(l3a),
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REG_F_OFFSET(l4a), REG_F_OFFSET(l5a),REG_F_OFFSET(l6a),REG_F_OFFSET(l7a),
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REG_F_OFFSET(l0a), REG_F_OFFSET(l0b),REG_F_OFFSET(l2a),REG_F_OFFSET(l2b),
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REG_F_OFFSET(l4a), REG_F_OFFSET(l4b),REG_F_OFFSET(l6a),REG_F_OFFSET(l6b),
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REG_N_OFFSET(sp), REG_N_OFFSET(fp), REG_N_OFFSET(pc), REG_N_OFFSET(psr),
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REG_F_OFFSET(fsr),
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REG_F_OFFSET(l0a), REG_F_OFFSET(l2a),REG_F_OFFSET(l4a),REG_F_OFFSET(l6a)
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/* @@@ 532 has more double length floating point regs, not accessed currently */
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REG_F_OFFSET(l0a), REG_F_OFFSET(l1a),REG_F_OFFSET(l2a),REG_F_OFFSET(l3a),
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REG_F_OFFSET(l4a), REG_F_OFFSET(l5a),REG_F_OFFSET(l6a),REG_F_OFFSET(l7a),
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};
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#define REG_ADDRESS(state,regnum) ((char *)(state)+reg_offset[regnum])
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/* Fetch COUNT contiguous registers from thread STATE starting from REGNUM
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* Caller knows that the regs handled in one transaction are of same size.
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*/
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@ -94,7 +96,7 @@ fetch_inferior_registers (regno)
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&stateCnt);
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if (ret != KERN_SUCCESS)
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message ("fetch_inferior_registers: %s ",
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warning ("fetch_inferior_registers: %s ",
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mach_error_string (ret));
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#if 0
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/* It may be more effective to store validate all of them,
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@ -142,7 +144,7 @@ store_inferior_registers (regno)
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if (ret != KERN_SUCCESS)
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{
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message ("store_inferior_registers (get): %s",
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warning ("store_inferior_registers (get): %s",
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mach_error_string (ret));
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if (must_suspend_thread)
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setup_thread (current_thread, 0);
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@ -173,7 +175,7 @@ store_inferior_registers (regno)
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NS532_COMBINED_STATE_COUNT);
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if (ret != KERN_SUCCESS)
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message ("store_inferior_registers (set): %s",
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warning ("store_inferior_registers (set): %s",
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mach_error_string (ret));
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if (must_suspend_thread)
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@ -0,0 +1,353 @@
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/* Functions specific to running gdb native on an ns32k running NetBSD
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Copyright 1989, 1992, 1993, 1994, 1996 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
|
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
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GNU General Public License for more details.
|
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You should have received a copy of the GNU General Public License
|
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along with this program; if not, write to the Free Software
|
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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#include <sys/types.h>
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#include <sys/ptrace.h>
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#include <machine/reg.h>
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#include <machine/frame.h>
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#include <machine/pcb.h>
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#include "defs.h"
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#include "inferior.h"
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#include "target.h"
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#include "gdbcore.h"
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#define RF(dst, src) \
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memcpy(®isters[REGISTER_BYTE(dst)], &src, sizeof(src))
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#define RS(src, dst) \
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memcpy(&dst, ®isters[REGISTER_BYTE(src)], sizeof(dst))
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void
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fetch_inferior_registers (regno)
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int regno;
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{
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struct reg inferior_registers;
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struct fpreg inferior_fpregisters;
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ptrace (PT_GETREGS, inferior_pid,
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(PTRACE_ARG3_TYPE) &inferior_registers, 0);
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ptrace (PT_GETFPREGS, inferior_pid,
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(PTRACE_ARG3_TYPE) &inferior_fpregisters, 0);
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RF(R0_REGNUM + 0, inferior_registers.r_r0);
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RF(R0_REGNUM + 1, inferior_registers.r_r1);
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RF(R0_REGNUM + 2, inferior_registers.r_r2);
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RF(R0_REGNUM + 3, inferior_registers.r_r3);
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RF(R0_REGNUM + 4, inferior_registers.r_r4);
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RF(R0_REGNUM + 5, inferior_registers.r_r5);
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RF(R0_REGNUM + 6, inferior_registers.r_r6);
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RF(R0_REGNUM + 7, inferior_registers.r_r7);
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|
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RF(SP_REGNUM , inferior_registers.r_sp);
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RF(FP_REGNUM , inferior_registers.r_fp);
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RF(PC_REGNUM , inferior_registers.r_pc);
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RF(PS_REGNUM , inferior_registers.r_psr);
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RF(FPS_REGNUM , inferior_fpregisters.r_fsr);
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RF(FP0_REGNUM +0, inferior_fpregisters.r_freg[0]);
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RF(FP0_REGNUM +2, inferior_fpregisters.r_freg[2]);
|
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RF(FP0_REGNUM +4, inferior_fpregisters.r_freg[4]);
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RF(FP0_REGNUM +6, inferior_fpregisters.r_freg[6]);
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RF(LP0_REGNUM + 1, inferior_fpregisters.r_freg[1]);
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RF(LP0_REGNUM + 3, inferior_fpregisters.r_freg[3]);
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RF(LP0_REGNUM + 5, inferior_fpregisters.r_freg[5]);
|
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RF(LP0_REGNUM + 7, inferior_fpregisters.r_freg[7]);
|
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registers_fetched ();
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}
|
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|
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void
|
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store_inferior_registers (regno)
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int regno;
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{
|
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struct reg inferior_registers;
|
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struct fpreg inferior_fpregisters;
|
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|
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RS(R0_REGNUM + 0, inferior_registers.r_r0);
|
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RS(R0_REGNUM + 1, inferior_registers.r_r1);
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RS(R0_REGNUM + 2, inferior_registers.r_r2);
|
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RS(R0_REGNUM + 3, inferior_registers.r_r3);
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RS(R0_REGNUM + 4, inferior_registers.r_r4);
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RS(R0_REGNUM + 5, inferior_registers.r_r5);
|
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RS(R0_REGNUM + 6, inferior_registers.r_r6);
|
||||
RS(R0_REGNUM + 7, inferior_registers.r_r7);
|
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|
||||
RS(SP_REGNUM , inferior_registers.r_sp);
|
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RS(FP_REGNUM , inferior_registers.r_fp);
|
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RS(PC_REGNUM , inferior_registers.r_pc);
|
||||
RS(PS_REGNUM , inferior_registers.r_psr);
|
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|
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RS(FPS_REGNUM , inferior_fpregisters.r_fsr);
|
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RS(FP0_REGNUM +0, inferior_fpregisters.r_freg[0]);
|
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RS(FP0_REGNUM +2, inferior_fpregisters.r_freg[2]);
|
||||
RS(FP0_REGNUM +4, inferior_fpregisters.r_freg[4]);
|
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RS(FP0_REGNUM +6, inferior_fpregisters.r_freg[6]);
|
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RS(LP0_REGNUM + 1, inferior_fpregisters.r_freg[1]);
|
||||
RS(LP0_REGNUM + 3, inferior_fpregisters.r_freg[3]);
|
||||
RS(LP0_REGNUM + 5, inferior_fpregisters.r_freg[5]);
|
||||
RS(LP0_REGNUM + 7, inferior_fpregisters.r_freg[7]);
|
||||
|
||||
ptrace (PT_SETREGS, inferior_pid,
|
||||
(PTRACE_ARG3_TYPE) &inferior_registers, 0);
|
||||
ptrace (PT_SETFPREGS, inferior_pid,
|
||||
(PTRACE_ARG3_TYPE) &inferior_fpregisters, 0);
|
||||
}
|
||||
|
||||
|
||||
/* XXX - Add this to machine/regs.h instead? */
|
||||
struct coreregs {
|
||||
struct reg intreg;
|
||||
struct fpreg freg;
|
||||
};
|
||||
|
||||
/* Get registers from a core file. */
|
||||
static void
|
||||
fetch_core_registers (core_reg_sect, core_reg_size, which, reg_addr)
|
||||
char *core_reg_sect;
|
||||
unsigned core_reg_size;
|
||||
int which;
|
||||
unsigned int reg_addr; /* Unused in this version */
|
||||
{
|
||||
struct coreregs *core_reg;
|
||||
|
||||
core_reg = (struct coreregs *)core_reg_sect;
|
||||
|
||||
/*
|
||||
* We have *all* registers
|
||||
* in the first core section.
|
||||
* Ignore which.
|
||||
*/
|
||||
|
||||
if (core_reg_size < sizeof(*core_reg)) {
|
||||
fprintf_unfiltered (gdb_stderr, "Couldn't read regs from core file\n");
|
||||
return;
|
||||
}
|
||||
|
||||
/* Integer registers */
|
||||
RF(R0_REGNUM + 0, core_reg->intreg.r_r0);
|
||||
RF(R0_REGNUM + 1, core_reg->intreg.r_r1);
|
||||
RF(R0_REGNUM + 2, core_reg->intreg.r_r2);
|
||||
RF(R0_REGNUM + 3, core_reg->intreg.r_r3);
|
||||
RF(R0_REGNUM + 4, core_reg->intreg.r_r4);
|
||||
RF(R0_REGNUM + 5, core_reg->intreg.r_r5);
|
||||
RF(R0_REGNUM + 6, core_reg->intreg.r_r6);
|
||||
RF(R0_REGNUM + 7, core_reg->intreg.r_r7);
|
||||
|
||||
RF(SP_REGNUM , core_reg->intreg.r_sp);
|
||||
RF(FP_REGNUM , core_reg->intreg.r_fp);
|
||||
RF(PC_REGNUM , core_reg->intreg.r_pc);
|
||||
RF(PS_REGNUM , core_reg->intreg.r_psr);
|
||||
|
||||
/* Floating point registers */
|
||||
RF(FPS_REGNUM , core_reg->freg.r_fsr);
|
||||
RF(FP0_REGNUM +0, core_reg->freg.r_freg[0]);
|
||||
RF(FP0_REGNUM +2, core_reg->freg.r_freg[2]);
|
||||
RF(FP0_REGNUM +4, core_reg->freg.r_freg[4]);
|
||||
RF(FP0_REGNUM +6, core_reg->freg.r_freg[6]);
|
||||
RF(LP0_REGNUM + 1, core_reg->freg.r_freg[1]);
|
||||
RF(LP0_REGNUM + 3, core_reg->freg.r_freg[3]);
|
||||
RF(LP0_REGNUM + 5, core_reg->freg.r_freg[5]);
|
||||
RF(LP0_REGNUM + 7, core_reg->freg.r_freg[7]);
|
||||
registers_fetched ();
|
||||
}
|
||||
|
||||
/* Register that we are able to handle ns32knbsd core file formats.
|
||||
FIXME: is this really bfd_target_unknown_flavour? */
|
||||
|
||||
static struct core_fns nat_core_fns =
|
||||
{
|
||||
bfd_target_unknown_flavour,
|
||||
fetch_core_registers,
|
||||
NULL
|
||||
};
|
||||
|
||||
void
|
||||
_initialize_ns32knbsd_nat ()
|
||||
{
|
||||
add_core_fns (&nat_core_fns);
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* kernel_u_size() is not helpful on NetBSD because
|
||||
* the "u" struct is NOT in the core dump file.
|
||||
*/
|
||||
|
||||
#ifdef FETCH_KCORE_REGISTERS
|
||||
/*
|
||||
* Get registers from a kernel crash dump or live kernel.
|
||||
* Called by kcore-nbsd.c:get_kcore_registers().
|
||||
*/
|
||||
void
|
||||
fetch_kcore_registers (pcb)
|
||||
struct pcb *pcb;
|
||||
{
|
||||
struct switchframe sf;
|
||||
struct reg intreg;
|
||||
int dummy;
|
||||
|
||||
/* Integer registers */
|
||||
if (target_read_memory((CORE_ADDR)pcb->pcb_ksp, (char *)&sf, sizeof sf))
|
||||
error("Cannot read integer registers.");
|
||||
|
||||
/* We use the psr at kernel entry */
|
||||
if (target_read_memory((CORE_ADDR)pcb->pcb_onstack, (char *)&intreg, sizeof intreg))
|
||||
error("Cannot read processor status register.");
|
||||
|
||||
dummy = 0;
|
||||
RF(R0_REGNUM + 0, dummy);
|
||||
RF(R0_REGNUM + 1, dummy);
|
||||
RF(R0_REGNUM + 2, dummy);
|
||||
RF(R0_REGNUM + 3, sf.sf_r3);
|
||||
RF(R0_REGNUM + 4, sf.sf_r4);
|
||||
RF(R0_REGNUM + 5, sf.sf_r5);
|
||||
RF(R0_REGNUM + 6, sf.sf_r6);
|
||||
RF(R0_REGNUM + 7, sf.sf_r7);
|
||||
|
||||
dummy = pcb->pcb_kfp + 8;
|
||||
RF(SP_REGNUM , dummy);
|
||||
RF(FP_REGNUM , sf.sf_fp);
|
||||
RF(PC_REGNUM , sf.sf_pc);
|
||||
RF(PS_REGNUM , intreg.r_psr);
|
||||
|
||||
/* Floating point registers */
|
||||
RF(FPS_REGNUM , pcb->pcb_fsr);
|
||||
RF(FP0_REGNUM +0, pcb->pcb_freg[0]);
|
||||
RF(FP0_REGNUM +2, pcb->pcb_freg[2]);
|
||||
RF(FP0_REGNUM +4, pcb->pcb_freg[4]);
|
||||
RF(FP0_REGNUM +6, pcb->pcb_freg[6]);
|
||||
RF(LP0_REGNUM + 1, pcb->pcb_freg[1]);
|
||||
RF(LP0_REGNUM + 3, pcb->pcb_freg[3]);
|
||||
RF(LP0_REGNUM + 5, pcb->pcb_freg[5]);
|
||||
RF(LP0_REGNUM + 7, pcb->pcb_freg[7]);
|
||||
registers_fetched ();
|
||||
}
|
||||
#endif /* FETCH_KCORE_REGISTERS */
|
||||
|
||||
void
|
||||
clear_regs()
|
||||
{
|
||||
double zero = 0.0;
|
||||
int null = 0;
|
||||
|
||||
/* Integer registers */
|
||||
RF(R0_REGNUM + 0, null);
|
||||
RF(R0_REGNUM + 1, null);
|
||||
RF(R0_REGNUM + 2, null);
|
||||
RF(R0_REGNUM + 3, null);
|
||||
RF(R0_REGNUM + 4, null);
|
||||
RF(R0_REGNUM + 5, null);
|
||||
RF(R0_REGNUM + 6, null);
|
||||
RF(R0_REGNUM + 7, null);
|
||||
|
||||
RF(SP_REGNUM , null);
|
||||
RF(FP_REGNUM , null);
|
||||
RF(PC_REGNUM , null);
|
||||
RF(PS_REGNUM , null);
|
||||
|
||||
/* Floating point registers */
|
||||
RF(FPS_REGNUM , zero);
|
||||
RF(FP0_REGNUM +0, zero);
|
||||
RF(FP0_REGNUM +2, zero);
|
||||
RF(FP0_REGNUM +4, zero);
|
||||
RF(FP0_REGNUM +6, zero);
|
||||
RF(LP0_REGNUM + 0, zero);
|
||||
RF(LP0_REGNUM + 1, zero);
|
||||
RF(LP0_REGNUM + 2, zero);
|
||||
RF(LP0_REGNUM + 3, zero);
|
||||
return;
|
||||
}
|
||||
|
||||
/* Return number of args passed to a frame.
|
||||
Can return -1, meaning no way to tell. */
|
||||
|
||||
int
|
||||
frame_num_args(fi)
|
||||
struct frame_info *fi;
|
||||
{
|
||||
CORE_ADDR enter_addr;
|
||||
CORE_ADDR argp;
|
||||
int inst;
|
||||
int args;
|
||||
int i;
|
||||
|
||||
if (read_memory_integer (fi->frame, 4) == 0 && fi->pc < 0x10000) {
|
||||
/* main is always called with three args */
|
||||
return(3);
|
||||
}
|
||||
enter_addr = ns32k_get_enter_addr(fi->pc);
|
||||
if (enter_addr = 0)
|
||||
return(-1);
|
||||
argp = enter_addr == 1 ? SAVED_PC_AFTER_CALL(fi) : FRAME_SAVED_PC(fi);
|
||||
for (i = 0; i < 16; i++) {
|
||||
/*
|
||||
* After a bsr gcc may emit the following instructions
|
||||
* to remove the arguments from the stack:
|
||||
* cmpqd 0,tos - to remove 4 bytes from the stack
|
||||
* cmpd tos,tos - to remove 8 bytes from the stack
|
||||
* adjsp[bwd] -n - to remove n bytes from the stack
|
||||
* Gcc sometimes delays emitting these instructions and
|
||||
* may even throw a branch between our feet.
|
||||
*/
|
||||
inst = read_memory_integer(argp , 4);
|
||||
args = read_memory_integer(argp + 2, 4);
|
||||
if ((inst & 0xff) == 0xea) { /* br */
|
||||
args = ((inst >> 8) & 0xffffff) | (args << 24);
|
||||
if (args & 0x80) {
|
||||
if (args & 0x40) {
|
||||
args = ntohl(args);
|
||||
} else {
|
||||
args = ntohs(args & 0xffff);
|
||||
if (args & 0x2000)
|
||||
args |= 0xc000;
|
||||
}
|
||||
} else {
|
||||
args = args & 0xff;
|
||||
if (args & 0x40)
|
||||
args |= 0x80;
|
||||
}
|
||||
argp += args;
|
||||
continue;
|
||||
}
|
||||
if ((inst & 0xffff) == 0xb81f) /* cmpqd 0,tos */
|
||||
return(1);
|
||||
else if ((inst & 0xffff) == 0xbdc7) /* cmpd tos,tos */
|
||||
return(2);
|
||||
else if ((inst & 0xfffc) == 0xa57c) { /* adjsp[bwd] */
|
||||
switch (inst & 3) {
|
||||
case 0:
|
||||
args = ((args & 0xff) + 0x80);
|
||||
break;
|
||||
case 1:
|
||||
args = ((ntohs(args) & 0xffff) + 0x8000);
|
||||
break;
|
||||
case 3:
|
||||
args = -ntohl(args);
|
||||
break;
|
||||
default:
|
||||
return(-1);
|
||||
}
|
||||
if (args / 4 > 10 || (args & 3) != 0)
|
||||
continue;
|
||||
return(args / 4);
|
||||
}
|
||||
argp += 1;
|
||||
}
|
||||
return(-1);
|
||||
}
|
||||
Loading…
Reference in New Issue