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64b63c2993
__{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.
47 lines
832 B
Plaintext
47 lines
832 B
Plaintext
/* Script for ld testsuite */
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OUTPUT_ARCH(msp430)
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ENTRY(_start)
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SECTIONS
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{
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.text :
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{
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PROVIDE (_start = .);
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. = ALIGN(2);
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*(.text .stub .text.* .gnu.linkonce.t.* .text:*)
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}
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.rodata :
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{
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*(.rodata.* .rodata)
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. = ALIGN(2);
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. += 1;
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PROVIDE (__preinit_array_start = .);
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KEEP (*(SORT(.preinit_array.*)))
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KEEP (*(.preinit_array))
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PROVIDE (__preinit_array_end = .);
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. = ALIGN(2);
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PROVIDE (__init_array_start = .);
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KEEP (*(SORT(.init_array.*)))
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KEEP (*(.init_array))
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PROVIDE (__init_array_end = .);
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. = ALIGN(2);
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PROVIDE (__fini_array_start = .);
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KEEP (*(SORT(.fini_array.*)))
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KEEP (*(.fini_array))
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PROVIDE (__fini_array_end = .);
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}
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.data :
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{
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. = ALIGN(2);
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*(.data.* .data)
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}
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.bss :
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{
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. = ALIGN(2);
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*(.bss.* .bss)
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}
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}
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