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Eliminate variable length arrays in grub_vsnprintf_real.

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A bit tricky because this function has to continue to work without
	heap for short strings. Fixing prealloc to 32 arguments is reasonable
	but make all stack references use 32-bit offset rather than 8-bit one.
	So split va_args preparsing to separate function and put the prealloc
	into the caller.
This commit is contained in:
Vladimir Serbinenko 2013-11-27 15:16:09 +01:00
parent 4f9541226c
commit 2d76b4d81e
2 changed files with 180 additions and 128 deletions
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@ -1,3 +1,13 @@
2013-11-27 Vladimir Serbinenko <phcoder@gmail.com>
Eliminate variable length arrays in grub_vsnprintf_real.
A bit tricky because this function has to continue to work without
heap for short strings. Fixing prealloc to 32 arguments is reasonable
but make all stack references use 32-bit offset rather than 8-bit one.
So split va_args preparsing to separate function and put the prealloc
into the caller.
2013-11-27 Vladimir Serbinenko <phcoder@gmail.com>
Introduce grub_util_file_sync and use it instead of fsync(fileno(f)).