c2aaac080c
These are useless because they can't match any address. In fact, worse than useless because the .eh_frame_hdr lookup table matching addresses to FDEs does not contain information about the FDE range. The table is sorted by address; Range is inferred by the address delta from one entry to the next. So if a zero address range FDE is followed by a normal non-zero range FDE for the same address, everything is good. However, the qsort could just as easily sort the FDEs in the other order, in which case the normal FDE would effectively be seen to have a zero range. bfd/ PR 17447 * elf-bfd.h (struct eh_cie_fde): Comment re NULL u.fde.cie_inf. * elf-eh-frame.c (_bfd_elf_parse_eh_frame): Mark zero address range FDEs for discarding. (vma_compare): Sort on range after address. (_bfd_elf_gc_mark_fdes): Test for NULL u.fde.cie_inf. (_bfd_elf_discard_section_eh_frame): Likewise. Write "FDE" in error message rather than "fde". (_bfd_elf_write_section_eh_frame_hdr): Write "PC" and "FDE" in error message. ld/testsuite/ * ld-elf/eh1.s: Don't create FDEs with zero address ranges. * ld-elf/eh3.s: Likewise. * ld-elf/eh1.d, * ld-elf/eh2.d, * ld-elf/eh3.d: Adjust. * ld-mips-elf/eh-frame1-n32.d: Warning match update. * ld-mips-elf/eh-frame1-n64.d: Likewise. * ld-mips-elf/eh-frame2-n32.d: Likewise. * ld-mips-elf/eh-frame2-n64.d: Likewise.
198 lines
4.5 KiB
Makefile
198 lines
4.5 KiB
Makefile
#name: MIPS eh-frame 2, n32
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#source: eh-frame1.s
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#source: eh-frame1.s
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#as: -march=from-abi -EB -n32 --defsym alignment=2 --defsym fill=0
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#readelf: --relocs -wf
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#ld: -shared -melf32btsmipn32 -Teh-frame1.ld
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#warning: FDE encoding in.*prevents \.eh_frame_hdr table being created.
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Relocation section '\.rel\.dyn' .*:
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*Offset .*
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00000000 [0-9a-f]+ R_MIPS_NONE *
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# Initial PCs for the FDEs attached to CIE 0xb8
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000300d8 [0-9a-f]+ R_MIPS_REL32 *
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000300ec [0-9a-f]+ R_MIPS_REL32 *
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000301f4 [0-9a-f]+ R_MIPS_REL32 *
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00030208 [0-9a-f]+ R_MIPS_REL32 *
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0003008b [0-9a-f]+ R_MIPS_REL32 00000000 foo
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000300cc [0-9a-f]+ R_MIPS_REL32 00000000 foo
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0003010a [0-9a-f]+ R_MIPS_REL32 00000000 foo
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Contents of the \.eh_frame section:
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00000000 00000010 00000000 CIE
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Version: 1
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Augmentation: "zR"
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Code alignment factor: 1
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Data alignment factor: 4
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Return address column: 31
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Augmentation data: 1b
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DW_CFA_nop
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DW_CFA_nop
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DW_CFA_nop
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00000014 00000010 00000018 FDE cie=00000000 pc=00020000..00020010
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DW_CFA_nop
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DW_CFA_nop
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DW_CFA_nop
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00000028 00000010 0000002c FDE cie=00000000 pc=00020010..00020030
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DW_CFA_nop
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DW_CFA_nop
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DW_CFA_nop
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# basic2 removed
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0000003c 00000010 00000040 FDE cie=00000000 pc=00020030..00020060
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DW_CFA_nop
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DW_CFA_nop
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DW_CFA_nop
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# basic3 removed
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00000050 00000010 00000054 FDE cie=00000000 pc=00020060..000200a0
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DW_CFA_nop
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DW_CFA_nop
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DW_CFA_nop
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# basic4 removed
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00000064 00000010 00000068 FDE cie=00000000 pc=000200a0..000200f0
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DW_CFA_nop
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DW_CFA_nop
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DW_CFA_nop
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00000078 00000014 00000000 CIE
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Version: 1
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Augmentation: "zRP"
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Code alignment factor: 1
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Data alignment factor: 4
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Return address column: 31
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Augmentation data: 1b 00 00 00 00 00
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DW_CFA_nop
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00000090 00000010 0000001c FDE cie=00000078 pc=000200f0..00020100
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DW_CFA_nop
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DW_CFA_nop
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DW_CFA_nop
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000000a4 00000010 00000030 FDE cie=00000078 pc=00020100..00020120
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DW_CFA_nop
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DW_CFA_nop
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DW_CFA_nop
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000000b8 00000014 00000000 CIE
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Version: 1
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Augmentation: "zP"
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Code alignment factor: 1
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Data alignment factor: 4
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Return address column: 31
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Augmentation data: 50 00 00 00 00 00 00 00
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000000d0 00000010 0000001c FDE cie=000000b8 pc=00020120..00020130
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DW_CFA_nop
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DW_CFA_nop
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DW_CFA_nop
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000000e4 00000010 00000030 FDE cie=000000b8 pc=00020130..00020150
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DW_CFA_nop
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DW_CFA_nop
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DW_CFA_nop
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000000f8 00000014 00000000 CIE
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Version: 1
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Augmentation: "zPR"
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Code alignment factor: 1
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Data alignment factor: 4
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Return address column: 31
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Augmentation data: 00 00 00 00 00 1b
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DW_CFA_nop
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00000110 00000010 0000001c FDE cie=000000f8 pc=00020150..00020160
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DW_CFA_nop
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DW_CFA_nop
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DW_CFA_nop
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# FDE for .discard removed
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# zPR2 removed
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00000124 00000010 00000030 FDE cie=000000f8 pc=00020160..00020190
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DW_CFA_nop
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DW_CFA_nop
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DW_CFA_nop
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00000138 00000010 00000044 FDE cie=000000f8 pc=00020190..000201d0
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DW_CFA_nop
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DW_CFA_nop
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DW_CFA_nop
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0000014c 00000010 00000150 FDE cie=00000000 pc=000201d0..000201e0
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DW_CFA_nop
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DW_CFA_nop
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DW_CFA_nop
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# basic1 removed, followed by repeat of above
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00000160 00000010 00000164 FDE cie=00000000 pc=000201e0..000201f0
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DW_CFA_nop
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DW_CFA_nop
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DW_CFA_nop
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00000174 00000010 00000178 FDE cie=00000000 pc=000201f0..00020210
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DW_CFA_nop
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DW_CFA_nop
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DW_CFA_nop
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00000188 00000010 0000018c FDE cie=00000000 pc=00020210..00020240
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DW_CFA_nop
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DW_CFA_nop
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DW_CFA_nop
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0000019c 00000010 000001a0 FDE cie=00000000 pc=00020240..00020280
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DW_CFA_nop
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DW_CFA_nop
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DW_CFA_nop
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000001b0 00000010 000001b4 FDE cie=00000000 pc=00020280..000202d0
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DW_CFA_nop
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DW_CFA_nop
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DW_CFA_nop
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000001c4 00000010 00000150 FDE cie=00000078 pc=000202d0..000202e0
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DW_CFA_nop
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DW_CFA_nop
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DW_CFA_nop
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000001d8 00000010 00000164 FDE cie=00000078 pc=000202e0..00020300
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DW_CFA_nop
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DW_CFA_nop
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DW_CFA_nop
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000001ec 00000010 00000138 FDE cie=000000b8 pc=00020300..00020310
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DW_CFA_nop
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DW_CFA_nop
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DW_CFA_nop
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00000200 00000010 0000014c FDE cie=000000b8 pc=00020310..00020330
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DW_CFA_nop
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DW_CFA_nop
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DW_CFA_nop
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00000214 00000010 00000120 FDE cie=000000f8 pc=00020330..00020340
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DW_CFA_nop
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DW_CFA_nop
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DW_CFA_nop
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00000228 00000010 00000134 FDE cie=000000f8 pc=00020340..00020370
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DW_CFA_nop
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DW_CFA_nop
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DW_CFA_nop
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0000023c 00000010 00000148 FDE cie=000000f8 pc=00020370..000203b0
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DW_CFA_nop
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DW_CFA_nop
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DW_CFA_nop
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00000250 00000010 00000254 FDE cie=00000000 pc=000203b0..000203c0
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DW_CFA_nop
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DW_CFA_nop
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DW_CFA_nop
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