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The loads and stores handled in the second instruction of a sequence marked by R_PPC64_PCREL_OPT may be a prefix instruction. For example: pld ra,symbol@got@pcrel 0: pld rt,off(ra) .reloc 0b-8,R_PPC64_PCREL_OPT,(.-8)-(0b-8) can be optimised to pld rt,symbol+off@pcrel pnop * elf64-ppc.c (xlate_pcrel_opt): Handle prefix loads and stores in second instruction. (ppc64_elf_relocate_section): Likewise.
132 lines
2.6 KiB
ArmAsm
132 lines
2.6 KiB
ArmAsm
.text
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.globl _start
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_start:
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# original PCREL_OPT definition, with second insn immediately after first
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pld 9,sym@got@pcrel
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.reloc .-8,R_PPC64_PCREL_OPT,0
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lbz 3,0(9)
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# but we now allow an offset to the second insn
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pld 22,sym@got@pcrel
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.reloc .-8,R_PPC64_PCREL_OPT,0f-(.-8)
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nop
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0: lhz 4,0(22)
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# in fact, it can even be before the "first" insn
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0: lha 3,0(9)
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pld 9,sym@got@pcrel
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.reloc .-8,R_PPC64_PCREL_OPT,0b-(.-8)
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bne 0b
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# and of course, other local labels work
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pld 9,sym@got@pcrel
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.reloc .-8,R_PPC64_PCREL_OPT,.L1-(.-8)
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.L1: lwz 3,0(9)
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pld 9,sym@got@pcrel
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.reloc .-8,R_PPC64_PCREL_OPT,0f-(.-8)
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0: lwa 3,0(9)
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pld 9,sym@got@pcrel
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.reloc .-8,R_PPC64_PCREL_OPT,0f-(.-8)
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0: ld 3,0(9)
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pld 9,sym@got@pcrel
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.reloc .-8,R_PPC64_PCREL_OPT,0f-(.-8)
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0: lq 14,0(9)
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pld 9,sym@got@pcrel
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.reloc .-8,R_PPC64_PCREL_OPT,0f-(.-8)
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0: lfs 1,0(9)
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pld 9,sym@got@pcrel
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.reloc .-8,R_PPC64_PCREL_OPT,0f-(.-8)
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0: lfd 1,0(9)
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pld 9,sym@got@pcrel
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.reloc .-8,R_PPC64_PCREL_OPT,0f-(.-8)
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0: lxsd 30,0(9)
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pld 9,sym@got@pcrel
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.reloc .-8,R_PPC64_PCREL_OPT,0f-(.-8)
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0: lxssp 31,0(9)
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pld 9,sym@got@pcrel
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.reloc .-8,R_PPC64_PCREL_OPT,0f-(.-8)
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0: lxv 63,0(9)
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pld 9,sym@got@pcrel
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.reloc .-8,R_PPC64_PCREL_OPT,0f-(.-8)
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0: lxv 0,0(9)
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pld 9,sym@got@pcrel
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.reloc .-8,R_PPC64_PCREL_OPT,0f-(.-8)
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0: stb 3,0(9)
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pld 9,sym@got@pcrel
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.reloc .-8,R_PPC64_PCREL_OPT,0f-(.-8)
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0: sth 3,0(9)
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pld 9,sym@got@pcrel
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.reloc .-8,R_PPC64_PCREL_OPT,0f-(.-8)
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0: stw 3,0(9)
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pld 9,sym@got@pcrel
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.reloc .-8,R_PPC64_PCREL_OPT,0f-(.-8)
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0: std 3,0(9)
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pld 9,sym@got@pcrel
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.reloc .-8,R_PPC64_PCREL_OPT,0f-(.-8)
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0: stq 14,0(9)
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pld 9,sym@got@pcrel
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.reloc .-8,R_PPC64_PCREL_OPT,0f-(.-8)
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0: stfd 1,0(9)
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pld 9,sym@got@pcrel
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.reloc .-8,R_PPC64_PCREL_OPT,0f-(.-8)
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0: stfs 2,0(9)
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pld 9,sym@got@pcrel
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.reloc .-8,R_PPC64_PCREL_OPT,0f-(.-8)
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0: stxsd 30,0(9)
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pld 9,sym@got@pcrel
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.reloc .-8,R_PPC64_PCREL_OPT,0f-(.-8)
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0: stxssp 31,0(9)
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pld 9,sym@got@pcrel
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.reloc .-8,R_PPC64_PCREL_OPT,0f-(.-8)
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0: stxv 63,0(9)
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pld 9,sym@got@pcrel
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.reloc .-8,R_PPC64_PCREL_OPT,0f-(.-8)
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0: stxv 0,0(9)
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#offsets are allowed too
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pld 9,sym@got@pcrel
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0:
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lbz 3,0x1234(9)
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.reloc 0b-8,R_PPC64_PCREL_OPT,(.-4)-(0b-8)
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#and prefix insns as the second insn
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pld 9,sym@got@pcrel
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0:
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plq 4,0x12345678(9)
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.reloc 0b-8,R_PPC64_PCREL_OPT,(.-8)-(0b-8)
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# This should not optimize
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.extern i
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.type i,@object
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pld 9,i@got@pcrel
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.reloc .-8,R_PPC64_PCREL_OPT,0f-(.-8)
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0: ld 0,0(9)
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# and this should edit from GOT indirect to GOT relative
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# ie. change the pld to paddi, leaving the lbz as is.
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pld 7,sym@got@pcrel
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lbz 6,0(7)
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.data
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sym: .space 32
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