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binutils-gdb/ld/testsuite/ld-msp430-elf/initarray-warn.r

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MSP430: Fix alignment of __*_array_start symbols in default linker script __{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.
2020-08-28 20:56:53 +08:00
.*warning: "__init_array_start" symbol \(initarray-warn.ld\) is not word aligned
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