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-rw-r--r--docs/syscall_descriptions_syntax.md5
1 files changed, 4 insertions, 1 deletions
diff --git a/docs/syscall_descriptions_syntax.md b/docs/syscall_descriptions_syntax.md
index 63c86cc93..2bb790da1 100644
--- a/docs/syscall_descriptions_syntax.md
+++ b/docs/syscall_descriptions_syntax.md
@@ -67,7 +67,8 @@ rest of the type-options are type-specific:
value range start, how many values per process, underlying type
"compressed_image": zlib-compressed disk image
syscalls accepting compressed images must be marked with `no_generate`
- and `no_minimize` call attributes.
+ and `no_minimize` call attributes. if the content of the decompressed image
+ can be checked by a `fsck`-like command, use the `fsck` syscall attribute
"text": machine code of the specified type, type-options:
text type (x86_real, x86_16, x86_32, x86_64, arm64)
"void": type with static size 0
@@ -101,6 +102,8 @@ Call attributes are:
"breaks_returns": ignore return values of all subsequent calls in the program in fallback feedback (can't be trusted).
"no_generate": do not try to generate this syscall, i.e. use only seed descriptions to produce it.
"no_minimize": do not modify instances of this syscall when trying to minimize a crashing program.
+"fsck": the content of the compressed buffer argument for this syscall is a file system and the
+ string argument is a fsck-like command that will be called to verify the filesystem
"remote_cover": wait longer to collect remote coverage for this call.
```