From 63a027a3fb81e7cbc591be1635c82986402ced3c Mon Sep 17 00:00:00 2001 From: Nick Clifton Date: Thu, 10 Feb 2000 21:59:03 +0000 Subject: [PATCH] Add support for M340 processor --- sim/mcore/ChangeLog | 7 +++++++ sim/mcore/interp.c | 51 +++++++++++++++++++++++++++++++++++++++++++-- 2 files changed, 56 insertions(+), 2 deletions(-) diff --git a/sim/mcore/ChangeLog b/sim/mcore/ChangeLog index a43e7cbc756..0ded4fb57f4 100644 --- a/sim/mcore/ChangeLog +++ b/sim/mcore/ChangeLog @@ -1,3 +1,10 @@ +2000-02-10 Nick Clifton + + * interp.c (target_big_endian): New variable. + (mcore_extract_unsigned_integer, mcore_store_unsigned_integer, + wlat, rlat, sim_resume, sim_load): Add supprot for little + endian targets. + 2000-01-13 Nick Clifton * interp.c (sim_resume): Do not rely upon host semantics of shift diff --git a/sim/mcore/interp.c b/sim/mcore/interp.c index e8d0c63bc85..711326b6a45 100644 --- a/sim/mcore/interp.c +++ b/sim/mcore/interp.c @@ -1,5 +1,5 @@ /* Simulator for Motorola's MCore processor - Copyright (C) 1999 Free Software Foundation, Inc. + Copyright (C) 1999, 2000 Free Software Foundation, Inc. Contributed by Cygnus Solutions. This file is part of GDB, the GNU debugger. @@ -36,6 +36,7 @@ with this program; if not, write to the Free Software Foundation, Inc., typedef long int word; typedef unsigned long int uword; +static int target_big_endian = 0; static unsigned long heap_ptr = 0; host_callback * callback; @@ -58,6 +59,12 @@ mcore_extract_unsigned_integer (addr, len) the least significant. */ retval = 0; + if (! target_big_endian) + { + for (p = endaddr; p > startaddr;) + retval = (retval << 8) | * -- p; + } + else { for (p = startaddr; p < endaddr;) retval = (retval << 8) | * p ++; @@ -76,6 +83,15 @@ mcore_store_unsigned_integer (addr, len, val) unsigned char * startaddr = (unsigned char *)addr; unsigned char * endaddr = startaddr + len; + if (! target_big_endian) + { + for (p = startaddr; p < endaddr;) + { + * p ++ = val & 0xff; + val >>= 8; + } + } + else { for (p = endaddr; p > startaddr;) { @@ -92,7 +108,7 @@ mcore_store_unsigned_integer (addr, len, val) Keeping this data in target byte order simplifies the register read/write functions. Keeping this data in native order improves the performance of the simulator. Simulation speed is deemed more - important. */ + important. */ /* The ordering of the mcore_regset structure is matched in the gdb/config/mcore/tm-mcore.h file in the REGISTER_NAMES macro. */ @@ -216,6 +232,14 @@ wlat (x, v) cpu.asregs.exception = SIGBUS; } + else if (! target_big_endian) + { + unsigned char * p = cpu.mem + x; + p[3] = v >> 24; + p[2] = v >> 16; + p[1] = v >> 8; + p[0] = v; + } else { unsigned char * p = cpu.mem + x; @@ -248,6 +272,12 @@ what (x, v) cpu.asregs.exception = SIGBUS; } + else if (! target_big_endian) + { + unsigned char * p = cpu.mem + x; + p[1] = v >> 8; + p[0] = v; + } else { unsigned char * p = cpu.mem + x; @@ -299,6 +329,11 @@ rlat (x) cpu.asregs.exception = SIGBUS; return 0; } + else if (! target_big_endian) + { + unsigned char * p = cpu.mem + x; + return (p[3] << 24) | (p[2] << 16) | (p[1] << 8) | p[0]; + } else { unsigned char * p = cpu.mem + x; @@ -329,6 +364,11 @@ rhat (x) cpu.asregs.exception = SIGBUS; return 0; } + else if (! target_big_endian) + { + unsigned char * p = cpu.mem + x; + return (p[1] << 8) | p[0]; + } else { unsigned char * p = cpu.mem + x; @@ -762,11 +802,17 @@ sim_resume (sd, step, siggnal) if (pc & 02) { + if (! target_big_endian) + inst = ibuf >> 16; + else inst = ibuf & 0xFFFF; needfetch = 1; } else { + if (! target_big_endian) + inst = ibuf & 0xFFFF; + else inst = ibuf >> 16; } @@ -1952,6 +1998,7 @@ sim_load (sd, prog, abfd, from_tty) if (prog_bfd == NULL) return SIM_RC_FAIL; + target_big_endian = bfd_big_endian (prog_bfd); if (abfd == NULL) bfd_close (prog_bfd); -- 2.30.2