| 1 | -*- text -*- |
| 2 | |
| 3 | * Add support for Zilog eZ80 and Zilog Z180 CPUs. |
| 4 | |
| 5 | * Add support for z80-elf target. |
| 6 | |
| 7 | * Add support for relocation of each byte or word of multibyte value to Z80 |
| 8 | targets (just use right shift to 0, 8, 16, or 24 bits or AND operation |
| 9 | with 0xff/0xffff mask): ld a, label >> 16 \ ld hl, label & 0xffff |
| 10 | |
| 11 | * Add SDCC support for Z80 targets. |
| 12 | |
| 13 | Changes in 2.33: |
| 14 | |
| 15 | * Add support for the Arm Scalable Vector Extension version 2 (SVE2) |
| 16 | instructions. |
| 17 | |
| 18 | * Add support for the Arm Transactional Memory Extension (TME) |
| 19 | instructions. |
| 20 | |
| 21 | * Add support for the Armv8.1-M Mainline and M-profile Vector Extension (MVE) |
| 22 | instructions. |
| 23 | |
| 24 | * For MIPS, Add -m[no-]fix-loongson3-llsc option to fix (or not) Loongson3 |
| 25 | LLSC Errata. Add a --enable-mips-fix-loongson3-llsc=[yes|no] configure |
| 26 | time option to set the default behavior. Set the default if the configure |
| 27 | option is not used to "no". |
| 28 | |
| 29 | * Add support for the Arm Cortex-A76AE, Cortex-A77 and Cortex-M35P |
| 30 | processors. |
| 31 | |
| 32 | * Add support for the AArch64 Cortex-A34, Cortex-A65, Cortex-A65AE, |
| 33 | Cortex-A76AE, and Cortex-A77 processors. |
| 34 | |
| 35 | * Add .float16 directive for both Arm and AArch64 to allow encoding of 16-bit |
| 36 | floating point literals. Add .float16_format directive and |
| 37 | -mfp16-format=[ieee|alternative] option for Arm to control the format of the |
| 38 | encoding. |
| 39 | |
| 40 | * Add --gdwarf-cie-version command line flag. This allows control over which |
| 41 | version of DWARF CIE the assembler creates. |
| 42 | |
| 43 | Changes in 2.32: |
| 44 | |
| 45 | * Add -mvexwig=[0|1] option to x86 assembler to control encoding of |
| 46 | VEX.W-ignored (WIG) VEX instructions. |
| 47 | |
| 48 | * Add -mx86-used-note=[yes|no] option to generate (or not) x86 GNU property |
| 49 | notes. Add a --enable-x86-used-note configure time option to set the |
| 50 | default behavior. Set the default if the configure option is not used |
| 51 | to "no". |
| 52 | |
| 53 | * Add support for the MIPS Loongson EXTensions R2 (EXT2) instructions. |
| 54 | |
| 55 | * Add support for the MIPS Loongson EXTensions (EXT) instructions. |
| 56 | |
| 57 | * Add support for the MIPS Loongson Content Address Memory (CAM) ASE. |
| 58 | |
| 59 | * Add support for the C-SKY processor series. |
| 60 | |
| 61 | * Add support for the MIPS Loongson MultiMedia extensions Instructions (MMI) |
| 62 | ASE. |
| 63 | |
| 64 | Changes in 2.31: |
| 65 | |
| 66 | * The ADR and ADRL pseudo-instructions supported by the ARM assembler |
| 67 | now only set the bottom bit of the address of thumb function symbols |
| 68 | if the -mthumb-interwork command line option is active. |
| 69 | |
| 70 | * Add support for the MIPS Global INValidate (GINV) ASE. |
| 71 | |
| 72 | * Add support for the MIPS Cyclic Redudancy Check (CRC) ASE. |
| 73 | |
| 74 | * Add support for the Freescale S12Z architecture. |
| 75 | |
| 76 | * Add --generate-missing-build-notes=[yes|no] option to create (or not) GNU |
| 77 | Build Attribute notes if none are present in the input sources. Add a |
| 78 | --enable-generate-build-notes=[yes|no] configure time option to set the |
| 79 | default behaviour. Set the default if the configure option is not used |
| 80 | to "no". |
| 81 | |
| 82 | * Remove -mold-gcc command-line option for x86 targets. |
| 83 | |
| 84 | * Add -O[2|s] command-line options to x86 assembler to enable alternate |
| 85 | shorter instruction encoding. |
| 86 | |
| 87 | * Add support for .nops directive. It is currently supported only for |
| 88 | x86 targets. |
| 89 | |
| 90 | Changes in 2.30: |
| 91 | |
| 92 | * Add support for loaction views in DWARF debug line information. |
| 93 | |
| 94 | Changes in 2.29: |
| 95 | |
| 96 | * Add support for ELF SHF_GNU_MBIND. |
| 97 | |
| 98 | * Add support for the WebAssembly file format and wasm32 ELF conversion. |
| 99 | |
| 100 | * PowerPC gas now checks that the correct register class is used in |
| 101 | instructions. For instance, "addi %f4,%cr3,%r31" warns three times |
| 102 | that the registers are invalid. |
| 103 | |
| 104 | * Add support for the Texas Instruments PRU processor. |
| 105 | |
| 106 | * Support for the ARMv8-R architecture and Cortex-R52 processor has been |
| 107 | added to the ARM port. |
| 108 | |
| 109 | Changes in 2.28: |
| 110 | |
| 111 | * Add support for the RISC-V architecture. |
| 112 | |
| 113 | * Add support for the ARM Cortex-M23 and Cortex-M33 processors. |
| 114 | |
| 115 | Changes in 2.27: |
| 116 | |
| 117 | * Default to --enable-compressed-debug-sections=gas for Linux/x86 targets. |
| 118 | |
| 119 | * Add --no-pad-sections to stop the assembler from padding the end of output |
| 120 | sections up to their alignment boundary. |
| 121 | |
| 122 | * Support for the ARMv8-M architecture has been added to the ARM port. Support |
| 123 | for the ARMv8-M Security and DSP Extensions has also been added to the ARM |
| 124 | port. |
| 125 | |
| 126 | * ARC backend accepts .extInstruction, .extCondCode, .extAuxRegister, and |
| 127 | .extCoreRegister pseudo-ops that allow an user to define custom |
| 128 | instructions, conditional codes, auxiliary and core registers. |
| 129 | |
| 130 | * Add a configure option --enable-elf-stt-common to decide whether ELF |
| 131 | assembler should generate common symbols with the STT_COMMON type by |
| 132 | default. Default to no. |
| 133 | |
| 134 | * New command-line option --elf-stt-common= for ELF targets to control |
| 135 | whether to generate common symbols with the STT_COMMON type. |
| 136 | |
| 137 | * Add ability to set section flags and types via numeric values for ELF |
| 138 | based targets. |
| 139 | |
| 140 | * Add a configure option --enable-x86-relax-relocations to decide whether |
| 141 | x86 assembler should generate relax relocations by default. Default to |
| 142 | yes, except for x86 Solaris targets older than Solaris 12. |
| 143 | |
| 144 | * New command-line option -mrelax-relocations= for x86 target to control |
| 145 | whether to generate relax relocations. |
| 146 | |
| 147 | * New command-line option -mfence-as-lock-add=yes for x86 target to encode |
| 148 | lfence, mfence and sfence as "lock addl $0x0, (%[re]sp)". |
| 149 | |
| 150 | * Add assembly-time relaxation option for ARC cpus. |
| 151 | |
| 152 | * Add --with-cpu=TYPE configure option for ARC gas. This allows the default |
| 153 | cpu type to be adjusted at configure time. |
| 154 | |
| 155 | Changes in 2.26: |
| 156 | |
| 157 | * Add a configure option --enable-compressed-debug-sections={all,gas} to |
| 158 | decide whether DWARF debug sections should be compressed by default. |
| 159 | |
| 160 | * Add support for the ARC EM/HS, and ARC600/700 architectures. Remove |
| 161 | assembler support for Argonaut RISC architectures. |
| 162 | |
| 163 | * Symbol and label names can now be enclosed in double quotes (") which allows |
| 164 | them to contain characters that are not part of valid symbol names in high |
| 165 | level languages. |
| 166 | |
| 167 | * Added the correctly spelled -march=armv6kz, for ARMv6KZ support. The |
| 168 | previous spelling, -march=armv6zk, is still accepted. |
| 169 | |
| 170 | * Support for the ARMv8.1 architecture has been added to the Aarch64 port. |
| 171 | Support for the individual ARMv8.1 Adv.SIMD, LOR and PAN architecture |
| 172 | extensions has also been added to the Aarch64 port. |
| 173 | |
| 174 | * Support for the ARMv8.1 architecture has been added to the ARM port. Support |
| 175 | for the individual ARMv8.1 Adv.SIMD and PAN architecture extensions has also |
| 176 | been added to the ARM port. |
| 177 | |
| 178 | * Extend --compress-debug-sections option to support |
| 179 | --compress-debug-sections=[none|zlib|zlib-gnu|zlib-gabi] for ELF |
| 180 | targets. |
| 181 | |
| 182 | * --compress-debug-sections is turned on for Linux/x86 by default. |
| 183 | |
| 184 | Changes in 2.25: |
| 185 | |
| 186 | * Add support for the AVR Tiny microcontrollers. |
| 187 | |
| 188 | * Replace support for openrisc and or32 with support for or1k. |
| 189 | |
| 190 | * Enhanced the ARM port to accept the assembler output from the CodeComposer |
| 191 | Studio tool. Support is enabled via the new command-line option -mccs. |
| 192 | |
| 193 | * Add support for the Andes NDS32. |
| 194 | |
| 195 | Changes in 2.24: |
| 196 | |
| 197 | * Add support for the Texas Instruments MSP430X processor. |
| 198 | |
| 199 | * Add -gdwarf-sections command-line option to enable per-code-section |
| 200 | generation of DWARF .debug_line sections. |
| 201 | |
| 202 | * Add support for Altera Nios II. |
| 203 | |
| 204 | * Add support for the Imagination Technologies Meta processor. |
| 205 | |
| 206 | * Add support for the v850e3v5. |
| 207 | |
| 208 | * Remove assembler support for MIPS ECOFF targets. |
| 209 | |
| 210 | Changes in 2.23: |
| 211 | |
| 212 | * Add support for the 64-bit ARM architecture: AArch64. |
| 213 | |
| 214 | * Add support for S12X processor. |
| 215 | |
| 216 | * Add support for the VLE extension to the PowerPC architecture. |
| 217 | |
| 218 | * Add support for the Freescale XGATE architecture. |
| 219 | |
| 220 | * Add support for .bundle_align_mode, .bundle_lock, and .bundle_unlock |
| 221 | directives. These are currently available only for x86 and ARM targets. |
| 222 | |
| 223 | * Add support for the Renesas RL78 architecture. |
| 224 | |
| 225 | * Add support for the Adapteva EPIPHANY architecture. |
| 226 | |
| 227 | * For x86, allow 'rep bsf', 'rep bsr', and 'rep ret' syntax. |
| 228 | |
| 229 | Changes in 2.22: |
| 230 | |
| 231 | * Add support for the Tilera TILEPro and TILE-Gx architectures. |
| 232 | |
| 233 | Changes in 2.21: |
| 234 | |
| 235 | * Gas no longer requires doubling of ampersands in macros. |
| 236 | |
| 237 | * Add support for the TMS320C6000 (TI C6X) processor family. |
| 238 | |
| 239 | * GAS now understands an extended syntax in the .section directive flags |
| 240 | for COFF targets that allows the section's alignment to be specified. This |
| 241 | feature has also been backported to the 2.20 release series, starting with |
| 242 | 2.20.1. |
| 243 | |
| 244 | * Add support for the Renesas RX processor. |
| 245 | |
| 246 | * New command-line option, --compress-debug-sections, which requests |
| 247 | compression of DWARF debug information sections in the relocatable output |
| 248 | file. Compressed debug sections are supported by readelf, objdump, and |
| 249 | gold, but not currently by Gnu ld. |
| 250 | |
| 251 | Changes in 2.20: |
| 252 | |
| 253 | * Added support for v850e2 and v850e2v3. |
| 254 | |
| 255 | * GNU/Linux targets now supports "gnu_unique_object" as a value in the .type |
| 256 | pseudo op. It marks the symbol as being globally unique in the entire |
| 257 | process. |
| 258 | |
| 259 | * ARM assembler now supports .inst[.nw] pseudo-ops to insert opcodes specified |
| 260 | in binary rather than text. |
| 261 | |
| 262 | * Add support for common symbol alignment to PE formats. |
| 263 | |
| 264 | * Add support for the new discriminator column in the DWARF line table, |
| 265 | with a discriminator operand for the .loc directive. |
| 266 | |
| 267 | * Add support for Sunplus score architecture. |
| 268 | |
| 269 | * The .type pseudo-op now accepts a type of STT_GNU_IFUNC which can be used to |
| 270 | indicate that if the symbol is the target of a relocation, its value should |
| 271 | not be use. Instead the function should be invoked and its result used as |
| 272 | the value. |
| 273 | |
| 274 | * Add support for Lattice Mico32 (lm32) architecture. |
| 275 | |
| 276 | * Add support for Xilinx MicroBlaze architecture. |
| 277 | |
| 278 | Changes in 2.19: |
| 279 | |
| 280 | * New pseudo op .cfi_val_encoded_addr, to record constant addresses in unwind |
| 281 | tables without runtime relocation. |
| 282 | |
| 283 | * New command-line option, -h-tick-hex, for sh, m32c, and h8/300 targets, which |
| 284 | adds compatibility with H'00 style hex constants. |
| 285 | |
| 286 | * New command-line option, -msse-check=[none|error|warning], for x86 |
| 287 | targets. |
| 288 | |
| 289 | * New sub-option added to the assembler's -a command-line switch to |
| 290 | generate a listing output. The 'g' sub-option will insert into the listing |
| 291 | various information about the assembly, such as assembler version, the |
| 292 | command-line options used, and a time stamp. |
| 293 | |
| 294 | * New command-line option -msse2avx for x86 target to encode SSE |
| 295 | instructions with VEX prefix. |
| 296 | |
| 297 | * Add Intel XSAVE, EPT, MOVBE, AES, PCLMUL, AVX/FMA support for x86 target. |
| 298 | |
| 299 | * New command-line options, -march=CPU[,+EXTENSION...], -mtune=CPU, |
| 300 | -mmnemonic=[att|intel], -msyntax=[att|intel], -mindex-reg, |
| 301 | -mnaked-reg and -mold-gcc, for x86 targets. |
| 302 | |
| 303 | * Support for generating wide character strings has been added via the new |
| 304 | pseudo ops: .string16, .string32 and .string64. |
| 305 | |
| 306 | * Support for SSE5 has been added to the i386 port. |
| 307 | |
| 308 | Changes in 2.18: |
| 309 | |
| 310 | * The GAS sources are now released under the GPLv3. |
| 311 | |
| 312 | * Support for the National Semiconductor CR16 target has been added. |
| 313 | |
| 314 | * Added gas .reloc pseudo. This is a low-level interface for creating |
| 315 | relocations. |
| 316 | |
| 317 | * Add support for x86_64 PE+ target. |
| 318 | |
| 319 | * Add support for Score target. |
| 320 | |
| 321 | Changes in 2.17: |
| 322 | |
| 323 | * Support for the Infineon XC16X has been added by KPIT Cummins Infosystems. |
| 324 | |
| 325 | * Support for ms2 architecture has been added. |
| 326 | |
| 327 | * Support for the Z80 processor family has been added. |
| 328 | |
| 329 | * Add support for the "@<file>" syntax to the command line, so that extra |
| 330 | switches can be read from <file>. |
| 331 | |
| 332 | * The SH target supports a new command-line switch --enable-reg-prefix which, |
| 333 | if enabled, will allow register names to be optionally prefixed with a $ |
| 334 | character. This allows register names to be distinguished from label names. |
| 335 | |
| 336 | * Macros with a variable number of arguments are now supported. See the |
| 337 | documentation for how this works. |
| 338 | |
| 339 | * Added --reduce-memory-overheads switch to reduce the size of the hash |
| 340 | tables used, at the expense of longer assembly times, and |
| 341 | --hash-size=<NUMBER> to set the size of the hash tables used by gas. |
| 342 | |
| 343 | * Macro names and macro parameter names can now be any identifier that would |
| 344 | also be legal as a symbol elsewhere. For macro parameter names, this is |
| 345 | known to cause problems in certain sources when the respective target uses |
| 346 | characters inconsistently, and thus macro parameter references may no longer |
| 347 | be recognized as such (see the documentation for details). |
| 348 | |
| 349 | * Support the .f_floating, .d_floating, .g_floating and .h_floating directives |
| 350 | for the VAX target in order to be more compatible with the VAX MACRO |
| 351 | assembler. |
| 352 | |
| 353 | * New command-line option -mtune=[itanium1|itanium2] for IA64 targets. |
| 354 | |
| 355 | Changes in 2.16: |
| 356 | |
| 357 | * Redefinition of macros now results in an error. |
| 358 | |
| 359 | * New command-line option -mhint.b=[ok|warning|error] for IA64 targets. |
| 360 | |
| 361 | * New command-line option -munwind-check=[warning|error] for IA64 |
| 362 | targets. |
| 363 | |
| 364 | * The IA64 port now uses automatic dependency violation removal as its default |
| 365 | mode. |
| 366 | |
| 367 | * Port to MAXQ processor contributed by HCL Tech. |
| 368 | |
| 369 | * Added support for generating unwind tables for ARM ELF targets. |
| 370 | |
| 371 | * Add a -g command-line option to generate debug information in the target's |
| 372 | preferred debug format. |
| 373 | |
| 374 | * Support for the crx-elf target added. |
| 375 | |
| 376 | * Support for the sh-symbianelf target added. |
| 377 | |
| 378 | * Added a pseudo-op (.secrel32) to generate 32 bit section relative relocations |
| 379 | on pe[i]-i386; required for this target's DWARF 2 support. |
| 380 | |
| 381 | * Support for Motorola MCF521x/5249/547x/548x added. |
| 382 | |
| 383 | * Support for ColdFire EMAC instructions added and Motorola syntax for MAC/EMAC |
| 384 | instrucitons. |
| 385 | |
| 386 | * New command-line option -mno-shared for MIPS ELF targets. |
| 387 | |
| 388 | * New command-line option --alternate and pseudo-ops .altmacro and .noaltmacro |
| 389 | added to enter (and leave) alternate macro syntax mode. |
| 390 | |
| 391 | Changes in 2.15: |
| 392 | |
| 393 | * The MIPS -membedded-pic option (Embedded-PIC code generation) is |
| 394 | deprecated and will be removed in a future release. |
| 395 | |
| 396 | * Added PIC m32r Linux (ELF) and support to M32R assembler. |
| 397 | |
| 398 | * Added support for ARM V6. |
| 399 | |
| 400 | * Added support for sh4a and variants. |
| 401 | |
| 402 | * Support for Renesas M32R2 added. |
| 403 | |
| 404 | * Limited support for Mapping Symbols as specified in the ARM ELF |
| 405 | specification has been added to the arm assembler. |
| 406 | |
| 407 | * On ARM architectures, added a new gas directive ".unreq" that undoes |
| 408 | definitions created by ".req". |
| 409 | |
| 410 | * Support for Motorola ColdFire MCF528x added. |
| 411 | |
| 412 | * Added --gstabs+ switch to enable the generation of STABS debug format |
| 413 | information with GNU extensions. |
| 414 | |
| 415 | * Added support for MIPS64 Release 2. |
| 416 | |
| 417 | * Added support for v850e1. |
| 418 | |
| 419 | * Added -n switch for x86 assembler. By default, x86 GAS replaces |
| 420 | multiple nop instructions used for alignment within code sections |
| 421 | with multi-byte nop instructions such as leal 0(%esi,1),%esi. This |
| 422 | switch disables the optimization. |
| 423 | |
| 424 | * Removed -n option from MIPS assembler. It was not useful, and confused the |
| 425 | existing -non_shared option. |
| 426 | |
| 427 | Changes in 2.14: |
| 428 | |
| 429 | * Added support for MIPS32 Release 2. |
| 430 | |
| 431 | * Added support for Xtensa architecture. |
| 432 | |
| 433 | * Support for Intel's iWMMXt processor (an ARM variant) added. |
| 434 | |
| 435 | * An assembler test generator has been contributed and an example file that |
| 436 | uses it (gas/testsuite/gas/all/test-gen.c and test-exmaple.c). |
| 437 | |
| 438 | * Support for SH2E added. |
| 439 | |
| 440 | * GASP has now been removed. |
| 441 | |
| 442 | * Support for Texas Instruments TMS320C4x and TMS320C3x series of |
| 443 | DSP's contributed by Michael Hayes and Svein E. Seldal. |
| 444 | |
| 445 | * Support for the Ubicom IP2xxx microcontroller added. |
| 446 | |
| 447 | Changes in 2.13: |
| 448 | |
| 449 | * Support for the Fujitsu FRV architecture added by Red Hat. Models for FR400 |
| 450 | and FR500 included. |
| 451 | |
| 452 | * Support for DLX processor added. |
| 453 | |
| 454 | * GASP has now been deprecated and will be removed in a future release. Use |
| 455 | the macro facilities in GAS instead. |
| 456 | |
| 457 | * GASP now correctly parses floating point numbers. Unless the base is |
| 458 | explicitly specified, they are interpreted as decimal numbers regardless of |
| 459 | the currently specified base. |
| 460 | |
| 461 | Changes in 2.12: |
| 462 | |
| 463 | * Support for Don Knuth's MMIX, by Hans-Peter Nilsson. |
| 464 | |
| 465 | * Support for the OpenRISC 32-bit embedded processor by OpenCores. |
| 466 | |
| 467 | * The ARM assembler now accepts -march=..., -mcpu=... and -mfpu=... for |
| 468 | specifying the target instruction set. The old method of specifying the |
| 469 | target processor has been deprecated, but is still accepted for |
| 470 | compatibility. |
| 471 | |
| 472 | * Support for the VFP floating-point instruction set has been added to |
| 473 | the ARM assembler. |
| 474 | |
| 475 | * New psuedo op: .incbin to include a set of binary data at a given point |
| 476 | in the assembly. Contributed by Anders Norlander. |
| 477 | |
| 478 | * The MIPS assembler now accepts -march/-mtune. -mcpu has been deprecated |
| 479 | but still works for compatability. |
| 480 | |
| 481 | * The MIPS assembler no longer issues a warning by default when it |
| 482 | generates a nop instruction from a macro. The new command-line option |
| 483 | -n will turn on the warning. |
| 484 | |
| 485 | Changes in 2.11: |
| 486 | |
| 487 | * Support for PDP-11 and 2.11BSD a.out format, by Lars Brinkhoff. |
| 488 | |
| 489 | * x86 gas now supports the full Pentium4 instruction set. |
| 490 | |
| 491 | * Support for AMD x86-64 architecture, by Jan Hubicka, SuSE Labs. |
| 492 | |
| 493 | * Support for Motorola 68HC11 and 68HC12. |
| 494 | |
| 495 | * Support for Texas Instruments TMS320C54x (tic54x). |
| 496 | |
| 497 | * Support for IA-64. |
| 498 | |
| 499 | * Support for i860, by Jason Eckhardt. |
| 500 | |
| 501 | * Support for CRIS (Axis Communications ETRAX series). |
| 502 | |
| 503 | * x86 gas has a new .arch pseudo op to specify the target CPU architecture. |
| 504 | |
| 505 | * x86 gas -q command-line option quietens warnings about register size changes |
| 506 | due to suffix, indirect jmp/call without `*', stand-alone prefixes, and |
| 507 | translating various deprecated floating point instructions. |
| 508 | |
| 509 | Changes in 2.10: |
| 510 | |
| 511 | * Support for the ARM msr instruction was changed to only allow an immediate |
| 512 | operand when altering the flags field. |
| 513 | |
| 514 | * Support for ATMEL AVR. |
| 515 | |
| 516 | * Support for IBM 370 ELF. Somewhat experimental. |
| 517 | |
| 518 | * Support for numbers with suffixes. |
| 519 | |
| 520 | * Added support for breaking to the end of repeat loops. |
| 521 | |
| 522 | * Added support for parallel instruction syntax (DOUBLEBAR_PARALLEL). |
| 523 | |
| 524 | * New .elseif pseudo-op added. |
| 525 | |
| 526 | * New --fatal-warnings option. |
| 527 | |
| 528 | * picoJava architecture support added. |
| 529 | |
| 530 | * Motorola MCore 210 processor support added. |
| 531 | |
| 532 | * A new pseudo-op .intel_syntax has been implemented to allow gas to parse i386 |
| 533 | assembly programs with intel syntax. |
| 534 | |
| 535 | * New pseudo-ops .func,.endfunc to aid in debugging user-written assembler code. |
| 536 | |
| 537 | * Added -gdwarf2 option to generate DWARF 2 debugging information. |
| 538 | |
| 539 | * Full 16-bit mode support for i386. |
| 540 | |
| 541 | * Greatly improved instruction operand checking for i386. This change will |
| 542 | produce errors or warnings on incorrect assembly code that previous versions |
| 543 | of gas accepted. If you get unexpected messages from code that worked with |
| 544 | older versions of gas, please double check the code before reporting a bug. |
| 545 | |
| 546 | * Weak symbol support added for COFF targets. |
| 547 | |
| 548 | * Mitsubishi D30V support added. |
| 549 | |
| 550 | * Texas Instruments c80 (tms320c80) support added. |
| 551 | |
| 552 | * i960 ELF support added. |
| 553 | |
| 554 | * ARM ELF support added. |
| 555 | |
| 556 | Changes in 2.9: |
| 557 | |
| 558 | * Texas Instruments c30 (tms320c30) support added. |
| 559 | |
| 560 | * The assembler now optimizes the exception frame information generated by egcs |
| 561 | and gcc 2.8. The new --traditional-format option disables this optimization. |
| 562 | |
| 563 | * Added --gstabs option to generate stabs debugging information. |
| 564 | |
| 565 | * The -a option takes a new suboption, m (e.g., -alm) to expand macros in a |
| 566 | listing. |
| 567 | |
| 568 | * Added -MD option to print dependencies. |
| 569 | |
| 570 | Changes in 2.8: |
| 571 | |
| 572 | * BeOS support added. |
| 573 | |
| 574 | * MIPS16 support added. |
| 575 | |
| 576 | * Motorola ColdFire 5200 support added (configure for m68k and use -m5200). |
| 577 | |
| 578 | * Alpha/VMS support added. |
| 579 | |
| 580 | * m68k options --base-size-default-16, --base-size-default-32, |
| 581 | --disp-size-default-16, and --disp-size-default-32 added. |
| 582 | |
| 583 | * The alignment directives now take an optional third argument, which is the |
| 584 | maximum number of bytes to skip. If doing the alignment would require |
| 585 | skipping more than the given number of bytes, the alignment is not done at |
| 586 | all. |
| 587 | |
| 588 | * The ELF assembler has a new pseudo-op, .symver, used for symbol versioning. |
| 589 | |
| 590 | * The -a option takes a new suboption, c (e.g., -alc), to skip false |
| 591 | conditionals in listings. |
| 592 | |
| 593 | * Added new pseudo-op, .equiv; it's like .equ, except that it is an error if |
| 594 | the symbol is already defined. |
| 595 | |
| 596 | Changes in 2.7: |
| 597 | |
| 598 | * The PowerPC assembler now allows the use of symbolic register names (r0, |
| 599 | etc.) if -mregnames is used. Symbolic names preceded by a '%' (%r0, etc.) |
| 600 | can be used any time. PowerPC 860 move to/from SPR instructions have been |
| 601 | added. |
| 602 | |
| 603 | * Alpha Linux (ELF) support added. |
| 604 | |
| 605 | * PowerPC ELF support added. |
| 606 | |
| 607 | * m68k Linux (ELF) support added. |
| 608 | |
| 609 | * i960 Hx/Jx support added. |
| 610 | |
| 611 | * i386/PowerPC gnu-win32 support added. |
| 612 | |
| 613 | * SCO ELF support added. For OpenServer 5 targets (i386-unknown-sco3.2v5) the |
| 614 | default is to build COFF-only support. To get a set of tools that generate |
| 615 | ELF (they'll understand both COFF and ELF), you must configure with |
| 616 | target=i386-unknown-sco3.2v5elf. |
| 617 | |
| 618 | * m88k-motorola-sysv3* support added. |
| 619 | |
| 620 | Changes in 2.6: |
| 621 | |
| 622 | * Gas now directly supports macros, without requiring GASP. |
| 623 | |
| 624 | * Gas now has an MRI assembler compatibility mode. Use -M or --mri to select |
| 625 | MRI mode. The pseudo-op ``.mri 1'' will switch into the MRI mode until the |
| 626 | ``.mri 0'' is seen; this can be convenient for inline assembler code. |
| 627 | |
| 628 | * Added --defsym SYM=VALUE option. |
| 629 | |
| 630 | * Added -mips4 support to MIPS assembler. |
| 631 | |
| 632 | * Added PIC support to Solaris and SPARC SunOS 4 assembler. |
| 633 | |
| 634 | Changes in 2.4: |
| 635 | |
| 636 | * Converted this directory to use an autoconf-generated configure script. |
| 637 | |
| 638 | * ARM support, from Richard Earnshaw. |
| 639 | |
| 640 | * Updated VMS support, from Pat Rankin, including considerably improved |
| 641 | debugging support. |
| 642 | |
| 643 | * Support for the control registers in the 68060. |
| 644 | |
| 645 | * Handles (ignores) a new directive ".this_GCC_requires_the_GNU_assembler", to |
| 646 | provide for possible future gcc changes, for targets where gas provides some |
| 647 | features not available in the native assembler. If the native assembler is |
| 648 | used, it should become obvious pretty quickly what the problem is. |
| 649 | |
| 650 | * Usage message is available with "--help". |
| 651 | |
| 652 | * The GNU Assembler Preprocessor (gasp) is included. (Actually, it was in 2.3 |
| 653 | also, but didn't get into the NEWS file.) |
| 654 | |
| 655 | * Weak symbol support for a.out. |
| 656 | |
| 657 | * A bug in the listing code which could cause an infinite loop has been fixed. |
| 658 | Bugs in listings when generating a COFF object file have also been fixed. |
| 659 | |
| 660 | * Initial i386-svr4 PIC implementation from Eric Youngdale, based on code by |
| 661 | Paul Kranenburg. |
| 662 | |
| 663 | * Improved Alpha support. Immediate constants can have a much larger range |
| 664 | now. Support for the 21164 has been contributed by Digital. |
| 665 | |
| 666 | * Updated ns32k (pc532-mach, netbsd532) support from Ian Dall. |
| 667 | |
| 668 | Changes in 2.3: |
| 669 | |
| 670 | * Mach i386 support, by David Mackenzie and Ken Raeburn. |
| 671 | |
| 672 | * RS/6000 and PowerPC support by Ian Taylor. |
| 673 | |
| 674 | * VMS command scripts (make-gas.com, config-gas.com) have been worked on a bit, |
| 675 | based on mail received from various people. The `-h#' option should work |
| 676 | again too. |
| 677 | |
| 678 | * HP-PA work, by Jeff Law. Note, for the PA, gas-2.3 has been designed to work |
| 679 | with gdb-4.12 and gcc-2.6. As gcc-2.6 has not been released yet, a special |
| 680 | version of gcc-2.5.8 has been patched to work with gas-2.3. You can retrieve |
| 681 | this special version of gcc-2.5.8 via anonymous ftp from jaguar.cs.utah.edu |
| 682 | in the "dist" directory. |
| 683 | |
| 684 | * Vax support in gas fixed for BSD, so it builds and seems to run a couple |
| 685 | simple tests okay. I haven't put it through extensive testing. (GNU make is |
| 686 | currently required for BSD 4.3 builds.) |
| 687 | |
| 688 | * Support for the DEC Alpha, running OSF/1 (ECOFF format). The gas support is |
| 689 | based on code donated by CMU, which used an a.out-based format. I'm afraid |
| 690 | the alpha-a.out support is pretty badly mangled, and much of it removed; |
| 691 | making it work will require rewriting it as BFD support for the format anyways. |
| 692 | |
| 693 | * Irix 5 support. |
| 694 | |
| 695 | * The test suites have been fixed up a bit, so that they should work with a |
| 696 | couple different versions of expect and dejagnu. |
| 697 | |
| 698 | * Symbols' values are now handled internally as expressions, permitting more |
| 699 | flexibility in evaluating them in some cases. Some details of relocation |
| 700 | handling have also changed, and simple constant pool management has been |
| 701 | added, to make the Alpha port easier. |
| 702 | |
| 703 | * New option "--statistics" for printing out program run times. This is |
| 704 | intended to be used with the gcc "-Q" option, which prints out times spent in |
| 705 | various phases of compilation. (You should be able to get all of them |
| 706 | printed out with "gcc -Q -Wa,--statistics", I think.) |
| 707 | |
| 708 | Changes in 2.2: |
| 709 | |
| 710 | * RS/6000 AIX and MIPS SGI Irix 5 support has been added. |
| 711 | |
| 712 | * Configurations that are still in development (and therefore are convenient to |
| 713 | have listed in configure.in) still get rejected without a minor change to |
| 714 | gas/Makefile.in, so people not doing development work shouldn't get the |
| 715 | impression that support for such configurations is actually believed to be |
| 716 | reliable. |
| 717 | |
| 718 | * The program name (usually "as") is printed when a fatal error message is |
| 719 | displayed. This should prevent some confusion about the source of occasional |
| 720 | messages about "internal errors". |
| 721 | |
| 722 | * ELF support is falling into place. Support for the 386 should be working. |
| 723 | Support for SPARC Solaris is in. HPPA support from Utah is being integrated. |
| 724 | |
| 725 | * Symbol values are maintained as expressions instead of being immediately |
| 726 | boiled down to add-symbol, sub-symbol, and constant. This permits slightly |
| 727 | more complex calculations involving symbols whose values are not alreadey |
| 728 | known. |
| 729 | |
| 730 | * DBX-style debugging info ("stabs") is now supported for COFF formats. |
| 731 | If any stabs directives are seen in the source, GAS will create two new |
| 732 | sections: a ".stab" and a ".stabstr" section. The format of the .stab |
| 733 | section is nearly identical to the a.out symbol format, and .stabstr is |
| 734 | its string table. For this to be useful, you must have configured GCC |
| 735 | to generate stabs (by defining DBX_DEBUGGING_INFO), and must have a GDB |
| 736 | that can use the stab sections (4.11 or later). |
| 737 | |
| 738 | * LynxOS, on i386 and m68k platforms, is now supported. SPARC LynxOS |
| 739 | support is in progress. |
| 740 | |
| 741 | Changes in 2.1: |
| 742 | |
| 743 | * Several small fixes for i386-aix (PS/2) support from Minh Tran-Le have been |
| 744 | incorporated, but not well tested yet. |
| 745 | |
| 746 | * Altered the opcode table split for m68k; it should require less VM to compile |
| 747 | with gcc now. |
| 748 | |
| 749 | * Some minor adjustments to add (Convergent Technologies') Miniframe support, |
| 750 | suggested by Ronald Cole. |
| 751 | |
| 752 | * HPPA support (running OSF only, not HPUX) has been contributed by Utah. This |
| 753 | includes improved ELF support, which I've started adapting for SPARC Solaris |
| 754 | 2.x. Integration isn't completely, so it probably won't work. |
| 755 | |
| 756 | * HP9000/300 support, donated by HP, has been merged in. |
| 757 | |
| 758 | * Ian Taylor has finished the MIPS ECOFF (Ultrix, Irix) support. |
| 759 | |
| 760 | * Better error messages for unsupported configurations (e.g., hppa-hpux). |
| 761 | |
| 762 | * Test suite framework is starting to become reasonable. |
| 763 | |
| 764 | Changes in 2.0: |
| 765 | |
| 766 | * Mostly bug fixes. |
| 767 | |
| 768 | * Some more merging of BFD and ELF code, but ELF still doesn't work. |
| 769 | |
| 770 | Changes in 1.94: |
| 771 | |
| 772 | * BFD merge is partly done. Adventurous souls may try giving configure the |
| 773 | "--with-bfd-assembler" option. Currently, ELF format requires it, a.out |
| 774 | format accepts it; SPARC CPU accepts it. It's the default only for OS "elf" |
| 775 | or "solaris". (ELF isn't really supported yet. It needs work. I've got |
| 776 | some code from Utah for HP-PA ELF, and from DG for m88k ELF, but they're not |
| 777 | fully merged yet.) |
| 778 | |
| 779 | * The 68K opcode table has been split in half. It should now compile under gcc |
| 780 | without consuming ridiculous amounts of memory. |
| 781 | |
| 782 | * A couple data structures have been reduced in size. This should result in |
| 783 | saving a little bit of space at runtime. |
| 784 | |
| 785 | * Support for MIPS, from OSF and Ralph Campbell, has been merged in. The OSF |
| 786 | code provided ROSE format support, which I haven't merged in yet. (I can |
| 787 | make it available, if anyone wants to try it out.) Ralph's code, for BSD |
| 788 | 4.4, supports a.out format. We don't have ECOFF support in just yet; it's |
| 789 | coming. |
| 790 | |
| 791 | * Support for the Hitachi H8/500 has been added. |
| 792 | |
| 793 | * VMS host and target support should be working now, thanks chiefly to Eric |
| 794 | Youngdale. |
| 795 | |
| 796 | Changes in 1.93.01: |
| 797 | |
| 798 | * For m68k, support for more processors has been added: 68040, CPU32, 68851. |
| 799 | |
| 800 | * For i386, .align is now power-of-two; was number-of-bytes. |
| 801 | |
| 802 | * For m68k, "%" is now accepted before register names. For COFF format, which |
| 803 | doesn't use underscore prefixes for C labels, it is required, so variable "a0" |
| 804 | can be distinguished from the register. |
| 805 | |
| 806 | * Last public release was 1.38. Lots of configuration changes since then, lots |
| 807 | of new CPUs and formats, lots of bugs fixed. |
| 808 | |
| 809 | \f |
| 810 | Copyright (C) 2012-2020 Free Software Foundation, Inc. |
| 811 | |
| 812 | Copying and distribution of this file, with or without modification, |
| 813 | are permitted in any medium without royalty provided the copyright |
| 814 | notice and this notice are preserved. |
| 815 | |
| 816 | Local variables: |
| 817 | fill-column: 79 |
| 818 | End: |