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> Linux > How to make x32 objects and executable? |
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Jin X
"format ELF executable 3" makes x86 executable
"format ELF64 executable 3" makes x64 executable But how can I make x32 (x64 with 32-bit pointers) execetables? https://en.wikipedia.org/wiki/X32_ABI p.s. What does mean "3" after "executable" is these lines? |
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12 Apr 2017, 08:26 |
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Tomasz Grysztar
It should be an ELF file with class ELFCLASS32 and machine EM_X86_64. fasm's "format ELF" is always ELFCLASS32/EM_386 and "format ELF64" is always ELFCLASS64/EM_X86_64. But you can experiment with the ELF formatting macros in fasmg, since they allow to set up these properties freely:
Code: ELF.Settings.Class = ELFCLASS32 ELF.Settings.Machine = EM_X86_64 ELF.Settings.ABI = ELFOSABI_LINUX include 'format/elfexe.inc' include 'x64.inc' use64 |
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12 Apr 2017, 09:58 |
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Jin X
Thanks!
But why don't you make "format ELFx32" support in original fasm? |
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13 Apr 2017, 08:30 |
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Tomasz Grysztar
With fasmg's macros it is easier to test such things. If we test and make sure that changing these values is enough, I may try to implement it into fasm.
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13 Apr 2017, 11:17 |
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Jin X
You may compare headers of x64 and x32 programs made by 'as'+'ld' or 'nasm' to be sure or to find other differences...
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13 Apr 2017, 12:38 |
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revolution
See here for a working example.
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20 Feb 2019, 09:09 |
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