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The addressable signed 32-bit range for n64 MIPS `.got.plt' references is from 0xffffffff7fff8000 to 0x7fff7fff, due to how the composition of an LUI and an LD instruction works for address calculation in the 64-bit addressing mode, such as when CP0.Status.UX=1. We currently have a range check in `mips_finish_exec_plt', however it is not correct as it verifies that the `.got.plt' start address referred is between 0xffffffff80000000 and 0x7fffffff. It is also implemented as an assertion rather than a proper error message despite that the situation can be triggered by user input. Additionally there is no check made for individual `.got.plt' entries referred even though they can be out of range while the `.got.plt' start address is not. Fix all these problems and use the correct range for the check, limiting it to n64 output files, and then issue a proper error message both in `mips_finish_exec_plt' and in `_bfd_mips_elf_finish_dynamic_symbol', suggesting the use of the `-Ttext-segment=...' option that will often work and with the default linker scripts in particular. Add suitable tests covering boundary cases. bfd/ PR ld/22966 * elfxx-mips.c (_bfd_mips_elf_finish_dynamic_symbol): Verify the `.got.plt' entry referred is in range. (mips_finish_exec_plt): Correct the range check for `.got.plt' start. Replace the assertion used for that with a proper error message. ld/ PR ld/22966 * testsuite/ld-mips-elf/n64-plt-1.dd: New test. * testsuite/ld-mips-elf/n64-plt-1.gd: New test. * testsuite/ld-mips-elf/n64-plt-2.ed: New test. * testsuite/ld-mips-elf/n64-plt-3.ed: New test. * testsuite/ld-mips-elf/n64-plt-4.dd: New test. * testsuite/ld-mips-elf/n64-plt-4.gd: New test. * testsuite/ld-mips-elf/n64-plt-1.ld: New test linker script. * testsuite/ld-mips-elf/n64-plt-2.ld: New test linker script. * testsuite/ld-mips-elf/n64-plt-3.ld: New test linker script. * testsuite/ld-mips-elf/n64-plt-4.ld: New test linker script. * testsuite/ld-mips-elf/n64-plt.s: New test source. * testsuite/ld-mips-elf/n64-plt-lib.s: New test source. * testsuite/ld-mips-elf/mips-elf.exp: Run the new tests.
27 lines
727 B
Plaintext
27 lines
727 B
Plaintext
.*: +file format .*mips.*
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Disassembly of section \.plt:
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0000000010000280 <_PROCEDURE_LINKAGE_TABLE_>:
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10000280: 3c0e7fff lui t2,0x7fff
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10000284: ddd97fe8 ld t9,32744\(t2\)
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10000288: 25ce7fe8 addiu t2,t2,32744
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1000028c: 030ec023 subu t8,t8,t2
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10000290: 03e07825 move t3,ra
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10000294: 0018c0c2 srl t8,t8,0x3
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10000298: 0320f809 jalr t9
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1000029c: 2718fffe addiu t8,t8,-2
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00000000100002a0 <bar@plt>:
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100002a0: 3c0f7fff lui t3,0x7fff
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100002a4: ddf97ff8 ld t9,32760\(t3\)
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100002a8: 03200008 jr t9
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100002ac: 25f87ff8 addiu t8,t3,32760
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Disassembly of section \.text:
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00000000100002b0 <foo>:
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100002b0: 080000a8 j 100002a0 <bar@plt>
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100002b4: 00000000 nop
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\.\.\.
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