Development release 20120606 of mspgcc is now available. This is a development release. It is alpha-quality. There are known issues, and not all features I intended are present.
It also provides essentially full support for 20-bit code and data. So please be adventurous, download it or checkout the workspace, and try it. The sole documentation for 20-bit use is at: https://sourceforge.net/apps/mediawiki/mspgcc/index.php?title=Gcc47:20-Bit_Design I've updated these points since the last announcement: * The spelling of the memory model options has changed; use -mmemory-model=medium instead of -mmedium. * I've made sure the memory model specification is simply shorthand for selection of the -ma20, -mc20, -md20, and -msr20 flags. The compiler defines multilibs for the following combinations: -msr20 [small] -msr20 -mc20 [medium] -msr20 -mc20 -md20 [large] -msr20 -mc20 -md20 -ma20 [huge] -msr20 -md20 -ma20 [no model, supports data-only huge, untested] -msr20 -md20 [no model, supports data-only medium, untested] * The semantics of memory model small has been updated to use -msr20. If you don't have any interest in 20-bit integers or anything else, don't specify a memory model, or use -mmemory-model=none. * Target options -mcode-region and -mdata-region control the default placement of functions and data to be the far address space. The following known limitations are present: * I haven't yet updated binutils to distribute objects that are declared in .any.* sections between the corresponding .near.* and .far.* sections; all .any.* sections get stuffed into low memory. Use -mcode-region and -mdata-region, or add explicit __far__ attributes, to affect the placement of functions and data in 20-bit aware code. * All the 20-bit features were intended to be controlled through type and declaration attributes, with default settings controlled by compiler flags. While this is still how it is implemented, gcc is not prepared to deal with the sort of mixed pointers that individual control enables. See https://sourceforge.net/apps/mediawiki/mspgcc/index.php?title=Gcc47:20-Bit_Design#Warning_about_Mixing_Memory_Models, and stick to the pre-defined memory models. * DWARF2 data for CPUX MCUs now uses 32 bits for addresses instead of 16 bits. This enables building application with -ggdb when 20-bit addresses are present. However, gdb has not been updated to recognize this change, and gdb on CPUX MCUs is probably no longer usable. * Some of the test programs produce an internal compiler error in tree-ssa-loop-ivopts.c when built with -mmemory-model=large. This has to do with transforming pointers into loop induction variables when sizeof(void*) != sizeof(size_t). Use another memory model; both medium and huge work. * All testing has been done on toy programs, almost entirely with -Os. Real applications and other optimization flags may produce errors. The patch bundle for 20120606 is available at: https://sourceforge.net/projects/mspgcc/files/mspgcc/DEVEL-4.7.x The tag workspace/release/20120606 in git://mspgcc.git.sourceforge.net/gitroot/mspgcc/mspgcc checks out a workspace configured for this release. The tag workspace/master checks out a workspace configured for the development series. Downstream packagers: please don't bundle this. It's so experimental, only people who are build from source should be playing with it. The stable series remains LTS-20120406. As usual, please submit problems as tracker tickets at: https://sourceforge.net/tracker/?group_id=42303&atid=432701 Summary of changes in mspgcc release 20120606 since release 20120514 binutils: changes from binutils-2.22-20120514 to binutils-2.22-20120606: - 6a28808 [2012-06-06 07:15:12 -0500] Update DEV-PHASE for release - 8805129 [2012-05-30 17:50:59 -0500] SF 3530932 unable to link with 20-bit symbols in debug sections - 4e7ccd8 [2012-05-22 11:55:09 -0500] Temporarily place .any* in default sections gcc: changes from gcc-4.7.0-20120514 to gcc-4.7.0-20120606: - 52454c2 [2012-06-06 07:14:02 -0500] Update DEV-PHASE for release - 90cdd55 [2012-05-20 08:23:27 -0500] Upstream content change supporting move to elfos.h - 5f04738 [2012-06-05 18:06:36 -0500] Add hooks for non-standard SIZE_TYPE and PTRDIFF_TYPE - ffb61fc [2012-06-05 15:48:07 -0500] stor-layout: accept exact MODE_PARTIAL_INT match - 03e6eb6 [2012-06-04 09:04:24 -0500] Correct/note potential misuse of GET_MODE_BITSIZE - 8f71be3 [2012-05-30 11:50:03 -0500] Backport upstream precision patch - 1eee7ac [2012-05-20 14:22:58 -0500] Add hook TARGET_ASM_DECL_MERGEABLE_RODATA_PREFIX - 803171c [2012-05-20 12:11:20 -0500] Add hook TARGET_ASM_VARIABLE_SECTION - 8d75405 [2012-06-06 07:08:24 -0500] Update for release - 6b61c03 [2012-06-06 06:29:02 -0500] Inhibit output of non-identifier locals - 41fe016 [2012-06-05 18:07:26 -0500] Use hooks to define non-standard size_t and ptrdiff_t for msp430 -ma20 - 5388334 [2012-06-05 15:44:29 -0500] Correct bias eliminating argp - 8b1c1eb [2012-06-05 12:35:46 -0500] Clean up push/pop expanders to support 20-bit stack pointer - d67fc91 [2012-06-05 12:10:46 -0500] Add predicates validating SP mode - e41b504 [2012-06-05 06:20:35 -0500] Avoid improper reads from 4-byte memory into PSI - bb52596 [2012-06-04 19:04:43 -0500] Restore forced placement if interrupts in near region under CPUX - f816b44 [2012-06-04 17:38:55 -0500] Permit const_int offset from register as A20 indexed memory operands - 6405c5b [2012-06-04 17:20:22 -0500] Correct section for -md20 readonly data - 53eaa9a [2012-06-02 13:25:56 -0500] Inhibit reference to far writable sections - c5ae3927 [2012-06-02 10:31:45 -0500] Add -mcode-region and -mdata-region options - 51906e9 [2012-06-01 07:42:57 -0500] Update constants to avoid word overflow - 86b4c1e [2012-05-31 18:27:52 -0500] Add memory model option - 3f83aba [2012-05-31 14:15:51 -0500] Switch to option enumerations - ba9dabb [2012-05-30 17:52:41 -0500] Ensure interrupts default to near text section - ba5df59 [2012-05-30 17:51:56 -0500] SF 3530932 unable to link with 20-bit symbols in debug sections - e935583 [2012-05-30 16:40:30 -0500] Add %@ to asm output template - 74a64d0 [2012-05-30 13:50:09 -0500] Add -ma16/mc16/md16 to override -ma20/mc20/md20 - 089e276 [2012-05-30 12:36:41 -0500] Potentially treat PSImode as a MODE_INT instead of a MODE_PARTIAL_INT - a4539d6 [2012-05-30 12:05:47 -0500] Strip out unreferenced prologue/epilogue sequences - d5d15e5 [2012-05-29 21:25:55 -0500] Simplify negation insn - e9e8afb [2012-05-29 20:50:35 -0500] Simplify register management - a56ed4a [2012-05-29 12:10:55 -0500] Another step to requiring PSImode for far pointers - 4b154f9 [2012-05-29 11:18:03 -0500] Add a16 and recognize a16/a20 on pointer types - e6546a19c [2012-05-28 20:34:18 -0500] Restore function-specific sections for strings and jump tables - b08b9d8 [2012-05-28 12:47:07 -0500] Place text sections in appropriate region - 7cf7628 [2012-05-22 11:53:16 -0500] Ensure sections express the desired region - 81b946b [2012-05-22 10:34:25 -0500] Factor out categorize_decl_for_section - 82606a5 [2012-05-22 10:04:35 -0500] Make explicit that relocs are not supported - e5b9b29 [2012-05-22 09:50:59 -0500] Nothing filters for COMMON with near/far attrs - 7d887a8 [2012-05-21 14:04:44 -0500] Clean up section selection - 57bb4b6 [2012-05-21 13:55:14 -0500] Correct variable section to use relevant address space information - 74dd1f2 [2012-05-20 16:47:43 -0500] Hook in control over unique and variable sections - f42daed [2012-05-20 14:41:55 -0500] Use default_elf_select_section as template for msp430_select_section - 9cfdbbb [2012-05-20 11:45:09 -0500] Move towards complete control of section assignment - a80545e [2012-05-20 11:44:38 -0500] Remove unused feature (will use switchable sections for bss) - 4e20a9e [2012-05-20 09:49:07 -0500] Update control flow insns to add required A20 validations - 4f5abbc [2012-05-20 09:26:39 -0500] Accommodate 20-bit registers in profile register saver - a3184ab [2012-05-20 08:31:39 -0500] Defer to shared elfos.h for asm-related features - 09afb7f [2012-05-20 00:16:13 -0500] Clean up fprintf - a456cb0 [2012-05-19 23:43:44 -0500] Eliminate special definition of ASM_OUTPUT_LABEL - 2914a0e [2012-05-19 23:39:55 -0500] Eliminate special definition of globalize_label - 35246a5 [2012-05-19 23:24:02 -0500] Use standard size calculation for functions - 9b8d199 [2012-05-19 23:03:16 -0500] Add missing costs for PSI moves - b8f9ac4 [2012-05-19 23:00:42 -0500] Eliminate illogical IS_ASM_LOGICAL_LINE_SEPARATOR - 4615bbd [2012-05-19 22:59:08 -0500] Eliminate cloned string output, re-use elfos implementation - 60fb91c [2012-05-19 22:39:23 -0500] Remove unreferenced variable - 7cad4e9 [2012-05-19 22:39:09 -0500] Place function definitions in Target Macros section order - b1d2b43 [2012-05-19 12:47:40 -0500] Hook in section definitions - 3d5ae09 [2012-05-19 12:22:10 -0500] Hook in near/far/attributes - 262194b [2012-05-18 12:28:38 -0500] Update output templates to support D20 operands - 00295b2 [2012-05-18 16:47:09 -0500] Jump vector elements are the same mode as function pointers - 3c19bb6 [2012-05-18 09:28:35 -0500] Check for overflow in snprintf - 919f3a1 [2012-05-18 07:27:11 -0500] Check that pointer modes are as expected - 0d9fa88 [2012-05-18 07:26:18 -0500] Start generating -md20 multilibs - c014f4b [2012-05-17 17:17:32 -0500] Document alternative PSI definition and support it in code. - ee89bf7 [2012-05-17 16:41:56 -0500] First stage toward forcing use of PSI alone as a large pointer type - b03d6bf [2012-05-17 16:41:32 -0500] Correct RTL to note status register is always HImode - 7dd82aa [2012-05-17 09:21:47 -0500] Update use of sp to accommodate wide pointers - bbddf11 [2012-05-16 11:55:08 -0500] Recognize variant insn based on pointer size - 609aa21 [2012-05-16 11:53:50 -0500] Use genericized expanders when operating on Pmode values - d255d09 [2012-05-16 11:52:08 -0500] Accept SImode (=ptr_mode, vice Pmode) as valid for pointers - 4bb8063 [2012-05-16 10:31:06 -0500] Share type mode calculations, and use HImode for c16 gdb: no changes msp430-libc: changes from msp430libc-20120514 to msp430libc-20120606: - 13dedfe [2012-06-06 07:16:10 -0500] Regenerate - c6eda54 [2012-06-06 07:16:09 -0500] Update version number and release notes - 5e7dc3c [2012-06-05 13:34:12 -0500] PTR format depends on -md20 not -ma20 - c322064 [2012-06-05 10:47:45 -0500] Replace old decls with prototype decls - 465e652 [2012-06-02 21:34:11 -0500] Correct PTR formats when -ma20 in effect - d03bfac [2012-05-21 17:01:00 -0500] Update version number and regenerate - 4320748 [2012-04-27 14:38:08 -0500] Restore dropped: Add -fdata-sections and -ffunction-sections - 2fecb1c [2012-05-19 11:56:22 -0500] Fix source issues related to pointer/integer conversions - 9bc73e8 [2012-05-17 09:23:04 -0500] Updates to reflect potential for 20-bit pointer types msp430mcu: changes from msp430mcu-20120514 to msp430mcu-20120606: - a1d2eed [2012-06-06 07:17:11 -0500] Regenerate - f3d8f50 [2012-06-06 07:17:05 -0500] Update version number and release notes - 28ab4d3 [2012-06-06 06:59:13 -0500] Regenerate - d6fca64 [2012-05-31 17:25:13 -0500] Add memory model header constants ------------------------------------------------------------------------------ Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ _______________________________________________ Mspgcc-users mailing list Mspgcc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mspgcc-users
