mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-21 04:42:53 +08:00
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.
22 lines
305 B
ArmAsm
22 lines
305 B
ArmAsm
.text
|
|
.section .preinit_array,"aw"
|
|
.short 42
|
|
|
|
.section .init_array,"aw"
|
|
.short 43
|
|
|
|
.section .fini_array,"aw"
|
|
.short 44
|
|
|
|
.text
|
|
.global main
|
|
.type main, @function
|
|
main:
|
|
MOV #__preinit_array_start, R8
|
|
MOV #__init_array_start, R9
|
|
MOV #__fini_array_start, R10
|
|
CALL @R8
|
|
CALL @R9
|
|
CALL @R10
|
|
RET
|