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$Id: HISTORY,v 1.1121 2006/02/18 21:03:08 debug Exp $ |
$Id: HISTORY,v 1.1256 2006/06/23 20:43:44 debug Exp $ |
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Changelog for GXemul: |
Changelog for GXemul: |
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============== RELEASE 0.3.8 ============== |
============== RELEASE 0.3.8 ============== |
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20060219 Various minor updates. Removing the old MIPS16 skeleton code, |
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because it will need to be rewritten for dyntrans anyway. |
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20060220-22 Removing the non-working dyntrans backend support. |
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Continuing on the 64-bit dyntrans virtual memory generalization. |
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20060223 More work on the 64-bit vm generalization. |
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20060225 Beginning on MIPS dyntrans load/store instructions. |
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Minor PPC updates (64-bit load/store, etc). |
2584 |
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Fixes for the variable-instruction-length framework, some |
2585 |
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minor AVR updates (a simple Hello World program works!). |
2586 |
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Beginning on a skeleton for automatically generating documen- |
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tation (for devices etc.). |
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20060226 PPC updates (adding some more 64-bit instructions, etc). |
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AVR updates (more instructions). |
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FINALLY found and fixed the zs bug, making NetBSD/macppc |
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accept the serial console. |
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20060301 Adding more AVR instructions. |
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20060304 Continuing on AVR-related stuff. Beginning on a framework for |
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cycle-accurate device emulation. Adding an experimental "PAL |
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TV" device (just a dummy so far). |
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20060305 Adding more AVR instructions. |
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Adding a dummy epcom serial controller (for TS7200 emulation). |
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20060310 Removing the emul() command from configuration files, so only |
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net() and machine() are supported. |
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Minor progress on the MIPS dyntrans rewrite. |
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20060311 Continuing on the MIPS dyntrans rewrite (adding more |
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instructions, etc). |
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20060315 Adding more instructions (sllv, srav, srlv, bgtz[l], blez[l], |
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beql, bnel, slti[u], various loads and stores). |
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20060316 Removing the ALWAYS_SIGNEXTEND_32 option, since it was rarely |
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used. |
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Adding more MIPS dyntrans instructions, and fixing bugs. |
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20060318 Implementing fast loads/stores for MIPS dyntrans (big/little |
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endian, 32-bit and 64-bit modes). |
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20060320 Making MIPS dyntrans the default configure option; use |
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"--enable-oldmips" to use the old bintrans system. |
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Adding MIPS dyntrans dmult[u]; minor updates. |
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20060322 Continuing... adding some more instructions. |
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Adding a simple skeleton for demangling C++ "_ZN" symbols. |
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20060323 Moving src/debugger.c into a new directory (src/debugger/). |
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20060324 Fixing the hack used to load PPC ELFs (useful for relocated |
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Linux/ppc kernels), and adding a dummy G3 machine mode. |
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20060325-26 Beginning to experiment with GDB remote serial protocol |
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connections; adding a -G command line option for selecting |
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which TCP port to listen to. |
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20060330 Beginning a major cleanup to replace things like "0x%016llx" |
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with more correct "0x%016"PRIx64, etc. |
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Continuing on the GDB remote serial protocol support. |
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20060331 More cleanup, and some minor GDB remote progress. |
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20060402 Adding a hack to the configure script, to allow compilation |
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on systems that lack PRIx64 etc. |
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20060406 Removing the temporary FreeBSD/arm hack in dev_ns16550.c and |
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replacing it with a better fix from Olivier Houchard. |
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20060407 A remote debugger (gdb or ddd) can now start and stop the |
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emulator using the GDB remote serial protocol, and registers |
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and memory can be read. MIPS only for now. |
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20060408 More GDB progress: single-stepping also works, and also adding |
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support for ARM, PowerPC, and Alpha targets. |
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Continuing on the delay-slot-across-page-boundary issue. |
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20060412 Minor update: beginning to add support for the SPARC target |
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to the remote GDB functionality. |
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20060414 Various MIPS updates: adding more instructions for dyntrans |
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(eret, add), and making some exceptions work. Fixing a bug |
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in dmult[u]. |
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Implementing the first SPARC instructions (sethi, or). |
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20060415 Adding "magic trap" instructions so that PROM calls can be |
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software emulated in MIPS dyntrans. |
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Adding more MIPS dyntrans instructions (ddiv, dadd) and |
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fixing another bug in dmult. |
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20060416 More MIPS dyntrans progress: adding [d]addi, movn, movz, dsllv, |
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rfi, an ugly hack for supporting R2000/R3000 style faked caches, |
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preliminary interrupt support, and various other updates and |
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bugfixes. |
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20060417 Adding more SPARC instructions (add, sub, sll[x], sra[x], |
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srl[x]), and useful SPARC header definitions. |
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Adding the first (trivial) x86/AMD64 dyntrans instructions (nop, |
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cli/sti, stc/clc, std/cld, simple mov, inc ax). Various other |
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x86 updates related to variable instruction length stuff. |
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Adding unaligned loads/stores to the MIPS dyntrans mode (but |
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still using the pre-dyntrans (slow) imlementation). |
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20060419 Fixing a MIPS dyntrans exception-in-delay-slot bug. |
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Removing the old "show opcode statistics" functionality, since |
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it wasn't really useful and isn't implemented for dyntrans. |
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Single-stepping (or running with instruction trace) now looks |
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ok with dyntrans with delay-slot architectures. |
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20060420 Minor hacks (removing the -B command line option when compiled |
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for non-bintrans, and some other very minor updates). |
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Adding (slow) MIPS dyntrans load-linked/store-conditional. |
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20060422 Applying fixes for bugs discovered by Nils Weller's nwcc |
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(static DEC memmap => now per machine, and adding an extern |
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keyword in cpu_arm_instr.c). |
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Finally found one of the MIPS dyntrans bugs that I've been |
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looking for (copy/paste spelling error BIG vs LITTLE endian in |
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cpu_mips_instr_loadstore.c for 16-bit fast stores). |
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FINALLY found the major MIPS dyntrans bug: slti vs sltiu |
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signed/unsigned code in cpu_mips_instr.c. :-) |
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Adding more MIPS dyntrans instructions (lwc1, swc1, bgezal[l], |
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ctc1, tlt[u], tge[u], tne, beginning on rdhwr). |
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NetBSD/hpcmips can now reach userland when using dyntrans :-) |
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Adding some more x86 dyntrans instructions. |
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Finally removed the old Alpha-specific virtual memory code, |
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and replaced it with the generic 64-bit version. |
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Beginning to add disassembly support for SPECIAL3 MIPS opcodes. |
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20060423 Continuing on the delay-slot-across-page-boundary issue; |
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adding an end_of_page2 ic slot (like I had planned before, but |
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had removed for some reason). |
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Adding a quick-and-dirty fallback to legacy coprocessor 1 |
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code (i.e. skipping dyntrans implementation for now). |
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NetBSD/hpcmips and NetBSD/pmax (when running on an emulated |
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R4400) can now be installed and run. :-) (Many bugs left |
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to fix, though.) |
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Adding more MIPS dyntrans instructions: madd[u], msub[u]. |
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Cleaning up the SPECIAL2 vs R5900/TX79/C790 "MMI" opcode |
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maps somewhat (disassembly and dyntrans instruction decoding). |
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20060424 Adding an isa_revision field to mips_cpu_types.h, and making |
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sure that SPECIAL3 opcodes cause Reserved Instruction |
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exceptions on MIPS32/64 revisions lower than 2. |
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Adding the SPARC 'ba', 'call', 'jmpl/retl', 'and', and 'xor' |
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instructions. |
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20060425 Removing the -m command line option ("run at most x |
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instructions") and -T ("single_step_on_bad_addr"), because |
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they never worked correctly with dyntrans anyway. |
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Freshening up the man page. |
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20060428 Adding more MIPS dyntrans instructions: bltzal[l], idle. |
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Enabling MIPS dyntrans compare interrupts. |
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20060429 FINALLY found the weird dyntrans bug, causing NetBSD etc. to |
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behave strangely: some floating point code (conditional |
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coprocessor branches) could not be reused from the old |
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non-dyntrans code. The "quick-and-dirty fallback" only appeared |
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to work. Fixing by implementing bc1* for MIPS dyntrans. |
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More MIPS instructions: [d]sub, sdc1, ldc1, dmtc1, dmfc1, cfc0. |
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Freshening up MIPS floating point disassembly appearance. |
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20060430 Continuing on C790/R5900/TX79 disassembly; implementing 128-bit |
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"por" and "pextlw". |
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20060504 Disabling -u (userland emulation) unless compiled as unstable |
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development version. |
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Beginning on freshening up the testmachine include files, |
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to make it easier to reuse those files (placing them in |
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src/include/testmachine/), and beginning on a set of "demos" |
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or "tutorials" for the testmachine functionality. |
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Minor updates to the MIPS GDB remote protocol stub. |
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Refreshing doc/experiments.html and gdb_remote.html. |
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Enabling Alpha emulation in the stable release configuration, |
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even though no guest OSes for Alpha can run yet. |
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20060505 Adding a generic 'settings' object, which will contain |
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references to settable variables (which will later be possible |
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to access using the debugger). |
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20060506 Updating dev_disk and corresponding demo/documentation (and |
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switching from SCSI to IDE disk types, so it actually works |
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with current test machines :-). |
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20060510 Adding a -D_LARGEFILE_SOURCE hack for 64-bit Linux hosts, |
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so that fseeko() doesn't give a warning. |
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Updating the section about how dyntrans works (the "runnable |
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IR") in doc/intro.html. |
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Instruction updates (some x64=1 checks, some more R5900 |
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dyntrans stuff: better mul/mult separation from MIPS32/64, |
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adding ei and di). |
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Updating MIPS cpuregs.h to a newer one (from NetBSD). |
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Adding more MIPS dyntrans instructions: deret, ehb. |
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20060514 Adding disassembly and beginning implementation of SPARC wr |
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and wrpr instructions. |
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20060515 Adding a SUN SPARC machine mode, with dummy SS20 and Ultra1 |
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machines. Adding the 32-bit "rd psr" instruction. |
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20060517 Disassembly support for the general SPARC rd instruction. |
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Partial implementation of the cmp (subcc) instruction. |
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Some other minor updates (making sure that R5900 processors |
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start up with the EIE bit enabled, otherwise Linux/playstation2 |
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receives no interrupts). |
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20060519 Minor MIPS updates/cleanups. |
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20060521 Moving the MeshCube machine into evbmips; this seems to work |
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reasonably well with a snapshot of a NetBSD MeshCube kernel. |
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Cleanup/fix of MIPS config0 register initialization. |
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20060529 Minor MIPS fixes, including a sign-extension fix to the |
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unaligned load/store code, which makes NetBSD/pmax on R3000 |
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work better with dyntrans. (Ultrix and Linux/DECstation still |
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don't work, though.) |
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20060530 Minor updates to the Alpha machine mode: adding an AlphaBook |
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mode, an LCA bus (forwarding accesses to an ISA bus), etc. |
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20060531 Applying a bugfix for the MIPS dyntrans sc[d] instruction from |
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Ondrej Palkovsky. (Many thanks.) |
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20060601 Minifix to allow ARM immediate msr instruction to not give |
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an error for some valid values. |
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More Alpha updates. |
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20060602 Some minor Alpha updates. |
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20060603 Adding the Alpha cmpbge instruction. NetBSD/alpha prints its |
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first boot messages :-) on an emulated Alphabook 1. |
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20060612 Minor updates; adding a dev_ether.h include file for the |
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testmachine ether device. Continuing the hunt for the dyntrans |
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bug which makes Linux and Ultrix on DECstation behave |
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strangely... FINALLY found it! It seems to be related to |
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invalidation of the translation cache, on tlbw{r,i}. There |
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also seems to be some remaining interrupt-related problems. |
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20060614 Correcting the implementation of ldc1/sdc1 for MIPS dyntrans |
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(so that it uses 16 32-bit registers if the FR bit in the |
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status register is not set). |
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20060616 REMOVING BINTRANS COMPLETELY! |
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Removing the old MIPS interpretation mode. |
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Removing the MFHILO_DELAY and instruction delay stuff, because |
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they wouldn't work with dyntrans anyway. |
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20060617 Some documentation updates (adding "NetBSD-archive" to some |
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URLs, and new Debian/DECstation installation screenshots). |
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Removing the "tracenull" and "enable-caches" configure options. |
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Improving MIPS dyntrans performance somewhat (only invalidate |
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translations if necessary, on writes to the entryhi register, |
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instead of doing it for all cop0 writes). |
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20060618 More cleanup after the removal of the old MIPS emulation. |
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Trying to fix the MIPS dyntrans performance bugs/bottlenecks; |
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only semi-successful so far (for R3000). |
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20060620 Minor update to allow clean compilation again on Tru64/Alpha. |
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20060622 MIPS cleanup and fixes (removing the pc_last stuff, which |
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doesn't make sense with dyntrans anyway, and fixing a cross- |
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page-delay-slot-with-exception case in end_of_page). |
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Removing the old max_random_cycles_per_chunk stuff, and the |
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concept of cycles vs instructions for MIPS emulation. |
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FINALLY found and fixed the bug which caused NetBSD/pmax |
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clocks to behave strangely (it was a load to the zero register, |
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which was treated as a NOP; now it is treated as a load to a |
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dummy scratch register). |
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20060623 Increasing the dyntrans chunk size back to |
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N_SAFE_DYNTRANS_LIMIT, instead of N_SAFE_DYNTRANS_LIMIT/2. |
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Preparing for a quick release, even though there are known |
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bugs, and performance for non-R3000 MIPS emulation is very |
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poor. :-/ |
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Reverting to half the dyntrans chunk size again, because |
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NetBSD/cats seemed less stable with full size chunks. :( |
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NetBSD/sgimips 3.0 can now run :-) (With release 0.3.8, only |
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NetBSD/sgimips 2.1 worked, not 3.0.) |
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============== RELEASE 0.4.0 ============== |
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