74 lines
1.6 KiB
Python
Executable file
74 lines
1.6 KiB
Python
Executable file
#!/usr/bin/env python3
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template = """
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.global {name}
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{name}:
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li a7, SYS_{name}
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ecall
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ret
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""".strip()
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def genstub(syscall: str):
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if not 3 <= len(syscall) <= 15:
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raise ValueError("Syscall {name} is too short/long!".format(name=syscall[:35]))
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return template.format(name=syscall)
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syscalls = [
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"fork",
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"exit",
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"wait",
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"pipe",
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"read",
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"write",
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"close",
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"kill",
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"exec",
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"open",
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"mknod",
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"unlink",
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"fstat",
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"link",
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"mkdir",
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"chdir",
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"dup",
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"getpid",
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"sbrk",
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"sleep",
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"uptime",
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"trace",
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"halt",
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]
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assembly = "\n\n".join(map(genstub, syscalls))
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# TODO: Perhaps do some more specific assertions on the code here
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assert len(assembly) > 0, "No assembly code generated. Something is fishy"
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with open("kernel/syscall.h", "r") as sfile:
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lines = list(filter(lambda x: x.startswith("#define"), sfile.readlines()))
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header_calls = set([line.split()[1] for line in lines])
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calls = set(["SYS_" + call for call in syscalls])
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if header_calls == calls:
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print("#All items match in both sets.")
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else:
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missing_in_calls = header_calls - calls
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missing_in_header_calls = calls - header_calls
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if missing_in_calls:
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print(
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"#These items are in header_calls but not in calls:", missing_in_calls
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)
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if missing_in_header_calls:
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print(
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"#These items are in calls but not in header_calls:",
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missing_in_header_calls,
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)
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print("# generated by usys.py - do not edit\n")
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print('#include "kernel/syscall.h"\n')
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print(assembly)
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