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2021-01-01Update year range in copyright notice of binutils filesAlan Modra1-1/+1
2020-09-08MSP430: Support relocations for subtract expressions in .uleb128 directivesJozef Lawrynowicz1-0/+3
Link-time relaxations of branches are common for MSP430, given that GCC can generate pessimal branch instructions, and the -mcode-region=either/-mdata-region=either options to shuffle sections can further change the type of branch instruction required. These relaxations can result in invalid code when .uleb128 directives, used in the .gcc_except_table section, are used to calculate the distance between two labels. A value for the .uleb128 directive is calculated at assembly-time, and can't be updated at link-time, even if relaxation causes the distance between the labels to change. This patch adds relocations for subtract expressions in .uleb128 directives, to allow the linker to re-calculate the value of these expressions after relaxation has been performed. bfd/ChangeLog: * bfd-in2.h (bfd_reloc_code_real): Add BFD_RELOC_MSP430_{SET,SUB}_ULEB128. * elf32-msp430.c (msp430_elf_ignore_reloc): New. (elf_msp430_howto_table): Add R_MSP430{,X}_GNU_{SET,SUB}_ULEB128. (msp430_reloc_map): Add R_MSP430_GNU_{SET,SUB}_ULEB128. (msp430x_reloc_map): Add R_MSP430X_GNU_{SET,SUB}_ULEB128. (write_uleb128): New. (msp430_final_link_relocate): Handle R_MSP430{,X}_GNU_{SET,SUB}_ULEB128. * libbfd.c (_bfd_write_unsigned_leb128): New. * libbfd.h (_bfd_write_unsigned_leb128): New prototype. Add BFD_RELOC_MSP430_{SET,SUB}_ULEB128. * reloc.c: Document BFD_RELOC_MSP430_{SET,SUB}_ULEB128. binutils/ChangeLog: * readelf.c (target_specific_reloc_handling): Handle R_MSP430{,X}_GNU_{SET,SUB}_ULEB128. gas/ChangeLog: * config/tc-msp430.c (msp430_insert_uleb128_fixes): New. (msp430_md_end): Call msp430_insert_uleb128_fixes. include/ChangeLog: * elf/msp430.h (elf_msp430_reloc_type): Add R_MSP430_GNU_{SET,SUB}_ULEB128. (elf_msp430x_reloc_type): Add R_MSP430X_GNU_{SET,SUB}_ULEB128. ld/ChangeLog: * testsuite/ld-msp430-elf/msp430-elf.exp: Run new tests. * testsuite/ld-msp430-elf/uleb128.s: New test. * testsuite/ld-msp430-elf/uleb128_430.d: New test. * testsuite/ld-msp430-elf/uleb128_430x.d: New test.
2020-08-28MSP430: Fix alignment of __*_array_start symbols in default linker scriptJozef Lawrynowicz1-0/+13
__{preinit,init,fini}_array_start symbols must be word aligned in linker scripts. If the section preceding the __*_array_start symbol has an odd size, then a NULL byte will be present between the start symbol and the .*_array section itself, when the section gets automatically word-aligned. This results in a branch to an invalid address when the CRT startup code tries to run through the functions listed in the array sections. Some MSP430 linker scripts do not align the __*_array start symbols, so this added warning will catch that problem and help the user avoid the potential incorrect execution of the program. ld/ChangeLog: * emultempl/msp430.em (input_section_exists): New. (check_array_section_alignment): New. (gld${EMULATION_NAME}_finish): New. * scripttempl/elf32msp430.sc: Add ALIGN directives before the definition of __*_array_start symbols. * testsuite/ld-msp430-elf/finiarray-warn.ld: New test. * testsuite/ld-msp430-elf/finiarray-warn.r: New test. * testsuite/ld-msp430-elf/initarray-nowarn.ld: New test. * testsuite/ld-msp430-elf/initarray-warn.ld: New test. * testsuite/ld-msp430-elf/initarray-warn.r: New test. * testsuite/ld-msp430-elf/initarray.s: New test. * testsuite/ld-msp430-elf/msp430-elf.exp: Run new tests. * testsuite/ld-msp430-elf/preinitarray-warn.ld: New test. * testsuite/ld-msp430-elf/preinitarray-warn.r: New test.
2020-01-16MSP430: Add input section rules for .upper sections to default linker scriptJozef Lawrynowicz1-0/+2
ld/ChangeLog: 2020-01-16 Jozef Lawrynowicz <jozef.l@mittosystems.com> * scripttempl/elf32msp430.sc: Add input section rules for .upper.{text,data,rodata,bss}. * testsuite/ld-msp430-elf/msp430-elf.exp: Run new test. * testsuite/ld-msp430-elf/upper-input-sections.s: New test.
2020-01-15MSP430: Fix relocation overflow when using #lo(EXP) macroJozef Lawrynowicz1-0/+2
gas/ChangeLog: 2020-01-15 Jozef Lawrynowicz <jozef.l@mittosystems.com> * config/tc-msp430.c (CHECK_RELOC_MSP430): Always generate 430X relocations when the target is 430X, except when extracting part of an expression. (msp430_srcoperand): Adjust comment. Initialize the expp member of the msp430_operand_s struct as appropriate. (msp430_dstoperand): Likewise. * testsuite/gas/msp430/msp430.exp: Run new test. * testsuite/gas/msp430/reloc-lo-430x.d: New test. * testsuite/gas/msp430/reloc-lo-430x.s: New test. include/ChangeLog: 2020-01-15 Jozef Lawrynowicz <jozef.l@mittosystems.com> * opcode/msp430.h (enum msp430_expp_e): New. (struct msp430_operand_s): Add expp member to struct. ld/ChangeLog: 2020-01-15 Jozef Lawrynowicz <jozef.l@mittosystems.com> * testsuite/ld-msp430-elf/msp430-elf.exp: Run new test. * testsuite/ld-msp430-elf/reloc-lo-430x.s: New test.
2020-01-01Update year range in copyright notice of binutils filesAlan Modra1-1/+1
2019-10-07Add support for new functionality in the msp430 backend of GCC.Jozef Lawrynowicz1-1/+11
This functionality will generate a new GNU object attribute for the "data region" has been added. This object attribute is used mark whether the compiler has generated code assuming that data could be in the upper or lower memory regions. Code which assumes data is always in the lower memory region is incompatible with code which uses the full memory range for data. The patch also adds a new assembler directive ".mspabi_attribute" to handle the existing MSPABI object attributes. GCC will now emit both .gnu_attribute and .mspabi_attribute directives to indicate what options the source file was compiled with. The assembler will now check the values set in these directives against the options that the it has been invoked with. If there is a discrepancy, the assembler will exit with an error. bfd * elf32-msp430.c (elf32_msp430_merge_mspabi_attributes): Rename to.. (elf32_msp430_merge_msp430_attributes): Add support for merging the GNU object attribute for data region. binutils* readelf.c (display_msp430_gnu_attribute): New. (process_arch_specific): Use msp430 specific handler for GNU attributes. gas * config/tc-msp430.c (md_parse_option): Set lower_data_region_only to FALSE if the data region is set to "upper", "either" or "none". (msp430_object_attribute): New. (md_pseudo_table): Handle .mspabi_attribute and .gnu_attribute. (msp430_md_end): Replace hard-coded attribute values with enums. Handle data region object attribute. * doc/as.texi: Document MSP430 Data Region object attribute. * doc/c-msp430.texi: Document the .mspabi_attribute directive. * testsuite/gas/msp430/attr-430-small-bad.d: New test. * testsuite/gas/msp430/attr-430-small-bad.l: New test. * testsuite/gas/msp430/attr-430-small-good.d: New test. * testsuite/gas/msp430/attr-430-small.s: New test. * testsuite/gas/msp430/attr-430x-large-any-bad.d: New test. * testsuite/gas/msp430/attr-430x-large-any-bad.l: New test. * testsuite/gas/msp430/attr-430x-large-any-good.d: New test. * testsuite/gas/msp430/attr-430x-large-any.s: New test. * testsuite/gas/msp430/attr-430x-large-lower-bad.d: New test. * testsuite/gas/msp430/attr-430x-large-lower-bad.l: New test. * testsuite/gas/msp430/attr-430x-large-lower-good.d: New test. * testsuite/gas/msp430/attr-430x-large-lower.s: New test. * testsuite/gas/msp430/msp430.exp: Run new tests. include * elf/msp430.h: Add enums for MSPABI and GNU object attribute tag names and values. ld * testsuite/ld-msp430-elf/attr-gnu-main.s: New test. * testsuite/ld-msp430-elf/attr-gnu-obj.s: New test. * testsuite/ld-msp430-elf/attr-gnu-region-lower-upper.d: New test. * testsuite/ld-msp430-elf/attr-gnu-region-lower.d: New test. * testsuite/ld-msp430-elf/attr-gnu-region-upper.d: New test. * testsuite/ld-msp430-elf/msp430-elf.exp: Run new tests.
2019-04-17MSP430 Linker: Define __crt0_init_bss/__crt0_movedata symbols when .lower or ↵Jozef Lawrynowicz1-9/+43
.either prefixed sections are present. ld * config/tc-msp430.c (msp430_make_init_symbols): Define __crt0_init_bss symbol when .lower.bss or .either.bss sections exist. Define __crt0_movedata when .lower.data or .either.data sections exist. * testsuite/gas/msp430/either-data-bss-sym.d: New test. * testsuite/gas/msp430/low-data-bss-sym.d: New test. * testsuite/gas/msp430/either-data-bss-sym.s: New test source. * testsuite/gas/msp430/low-data-bss-sym.s: New test source. * testsuite/gas/msp430/msp430.exp: Run new tests. Enable large code model when running -mdata-region={upper,either} tests.
2019-01-01Update year range in copyright notice of binutils filesAlan Modra1-1/+1
2018-01-03Update year range in copyright notice of binutils filesAlan Modra1-1/+1
2017-08-29Improve MSP430 section placement.Jozef Lawrynowicz1-0/+141
ld * emultempl/msp430.em (change_output_section): New function. (move_prefixed_section): New function. (add_region_prefix): New function. (msp430_elf_after_open): New function. (gld${EMULATION_NAME}_add_options): Implement. (gld${EMULATION_NAME}_list_options): Implement. (gld${EMULATION_NAME}_handle_option): Implement. * ld.texinfo: Document new options. * testsuite/ld-msp430-elf/main-bss-lower.d: New. * testsuite/ld-msp430-elf/main-bss-upper.d: New. * testsuite/ld-msp430-elf/main-const-lower.d: New. * testsuite/ld-msp430-elf/main-const-upper.d: New. * testsuite/ld-msp430-elf/main-text-lower.d: New. * testsuite/ld-msp430-elf/main-text-upper.d: New. * testsuite/ld-msp430-elf/main-var-lower.d: New. * testsuite/ld-msp430-elf/main-var-upper.d: New. * testsuite/ld-msp430-elf/main-with-data-bss-unique-sec.s: New. * testsuite/ld-msp430-elf/main-with-data-bss.s: New. * testsuite/ld-msp430-elf/main-with-text-rodata-unique-sec.s: New. * testsuite/ld-msp430-elf/main-with-text-rodata.s: New. * testsuite/ld-msp430-elf/msp430-elf.exp: New. * testsuite/ld-msp430-elf/msp430-no-lower.ld: New. * testsuite/ld-msp430-elf/msp430.ld: New. * emultempl/msp430.em (data_statement_size): New. (eval_upper_either_sections): New. (eval_lower_either_sections): New. (intermediate_relax_sections): New. (msp430_elf_after_allocation): New. * emultempl/msp430.em (gld${EMULATION_NAME}_place_orphan): Always place sections in the lower region. gas * config/tc-msp430.c (md_parse_option): Define high data and high bss symbols if -mdata-region is passed. Define -mdata-region open. * doc/c-msp430.texi: Document -mdata-region. * testsuite/gas/msp430/high-data-bss-sym.d: New test. * testsuite/gas/msp430/high-data-bss-sym.s: New. * testsuite/gas/msp430/msp430.exp: Add -mdata-region tests.