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Index > Compiler Internals > [fasmg] Error: could not generate code...
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zhak



Joined: 12 Apr 2005
Posts: 501
Location: Belarus
zhak 22 Jan 2017, 17:08
Error: could not generate code within the allowed number of passes.

Well, it took me some time to find what had been causing this error, as no additional information was displayed.

It appeared, that I have a struct definition:

Code:
struct EFI_GRAPHICS_OUTPUT_MODE_INFORMATION
  Version               rd 1
  HorizontalResolution  rd 1
  VerticalResolution    rd 1
  PixelFormat           rd 1
  PixelInformation      EFI_PIXEL_BITMASK
  PixelsPerScanLine     rd 1
ends


and I also have a macro

Code:
struct VERSION_INFO
  Major     rd 1
  Minor     rd 1
  Patch     rd 1
  Build     rd 1
ends

macro Version name, ver
  match maj.min.p, ver
    name VERSION_INFO Major:0x#maj, Minor:0x#min, Patch:0x#p, Build:%t
  else
    err 'Valid version in x.y.z format is expected'
  end match
end macro


Not sure if this is as designed, but if it is, then extreme care should be taken when giving names to macros and structures entries
Post 22 Jan 2017, 17:08
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Tomasz Grysztar



Joined: 16 Jun 2003
Posts: 8394
Location: Kraków, Poland
Tomasz Grysztar 22 Jan 2017, 19:47
Yes, this is an old problem that when you can redefine everything, it is easy to shoot yourself in the foot.

On the other hand, unlike fasm 1, fasmg has some facilities that allow to prevent this specific problem that you encountered. An implementation of "struct" could use "macro ?" or even "macro ?!" to intercept and parse all lines of its block. In fact I plan to prepare such macro myself, because my planned macro which would be compatible with fasm 1 "struct" would need to work exactly like that.
Post 22 Jan 2017, 19:47
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