Read section names from string table if needed

[madebr]

The debug sections of MinGW executables are longer than 8 characters and are stored in the string table.
In the same way as is done in PE/COFF object files, this table is stored after the symbol table.

On a dummy MinGW executables, this changes the output of the following small program:

import reccmp.formats

# /tmp/a.exe is a minimal MinGW executable
image = reccmp.formats.detect.detect_image("/tmp/a.exe")

for section in image.sections:
    print(
        f"{section.name:20} 0x{section.virtual_range.start:08x} 0x{section.virtual_range.stop-section.virtual_range.start:08x}"
    )

From:

.text                0x00401000 0x00001710
.data                0x00403000 0x00000034
.rdata               0x00404000 0x000009f0
/4                   0x00405000 0x000007f0
.bss                 0x00406000 0x000000b0
.idata               0x00407000 0x00000444
.tls                 0x00408000 0x00000008
.reloc               0x00409000 0x0000023c
/14                  0x0040a000 0x00000360
/29                  0x0040b000 0x0000b575
/41                  0x00417000 0x00001e0c
/55                  0x00419000 0x00001d15
/67                  0x0041b000 0x00000038
/80                  0x0041c000 0x0000035b
/91                  0x0041d000 0x00002141
/107                 0x00420000 0x00000b1d
/123                 0x00421000 0x00000185

To:

.text                0x00401000 0x00001710
.data                0x00403000 0x00000034
.rdata               0x00404000 0x000009f0
.eh_frame            0x00405000 0x000007f0
.bss                 0x00406000 0x000000b0
.idata               0x00407000 0x00000444
.tls                 0x00408000 0x00000008
.reloc               0x00409000 0x0000023c
.debug_aranges       0x0040a000 0x00000360
.debug_info          0x0040b000 0x0000b575
.debug_abbrev        0x00417000 0x00001e0c
.debug_line          0x00419000 0x00001d15
.debug_frame         0x0041b000 0x00000038
.debug_str           0x0041c000 0x0000035b
.debug_line_str      0x0041d000 0x00002141
.debug_loclists      0x00420000 0x00000b1d
.debug_rnglists      0x00421000 0x00000185

[jonschz]

Where did this constant come from?

Suggested change

	PE_COFF_SYMBOL_SIZE = 18
	PE_COFF_SYMBOL_SIZE = 18
	"""<link to PE standard> / <explanation why 18 was chosen>"""

[disinvite]

https://learn.microsoft.com/en-us/windows/win32/debug/pe-format#coff-symbol-table

[madebr]

Thanks for the link.

I put this pr aside because the symbol table does exist in MinGW debug executables, giving us access to the addresses of linked symbols. But I guess that can be added in a future pr.