Removed more code artifacts
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222cf580e0
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# run this as: jq -r -f SELF syscalls.json
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# download syscalls.json from https://syscalls.mebeim.net/db/x86/64/x64/v6.6/table.json
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def asargs: join(", ");
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def csig: "\(.name)(\(.signature | asargs))";
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def indent(w): w + (split("\n") | join("\n" + w));
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def getargs: .signature | map(capture("(?<type>.*[^a-zA-Z_0-9]+)(?<name>[a-zA-Z_0-9]*)"));
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def strim: sub("^[[:space:]]+"; "") | sub("[[:space:]]+$"; "");
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def rawtype: gsub("const"; "") | strim;
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# returns false if the given type may contain or be a pointer
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def isflat: [.] | inside([
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"char",
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"unsigned char",
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"int",
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"struct cachestat_range",
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"struct stat",
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"struct pollfd",
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"sigset_t",
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"fd_set",
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"struct __kernel_old_timeval",
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"struct __kernel_old_itimerval",
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"struct __kernel_timespec",
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"struct sockaddr",
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"void",
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"loff_t",
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"struct rusage",
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"struct new_utsname",
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"struct sembuf",
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"struct msqid_ds", # unused pointers
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"struct linux_dirent",
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"struct timezone",
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"struct rlimit",
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"struct sysinfo",
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"struct tms",
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"gid_t",
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"uid_t",
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"siginfo_t",
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"struct utimbuf",
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"struct ustat",
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"struct statfs",
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"struct sched_param",
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"struct __kernel_timex",
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"__kernel_old_time_t",
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"u32",
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"unsigned long",
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"aio_context_t",
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"struct io_event",
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"struct iocb",
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"struct linux_dirent64",
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"timer_t",
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"struct __kernel_itimerspec",
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"struct epoll_event",
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"struct mq_attr",
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"unsigned int",
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"struct siginfo",
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"size_t",
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"struct perf_event_attr",
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"struct rlimit64",
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"struct file_handle",
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"struct getcpu_cache",
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"struct sched_attr",
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"union bpf_attr",
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"struct statx",
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"struct __aio_sigset",
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"struct rseq",
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"struct io_uring_params",
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"struct clone_args",
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"struct open_how",
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"struct mount_attr",
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"struct landlock_ruleset_attr",
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"struct futex_waitv",
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""
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]);
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# returns true if the given type definitely contains a pointer
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def isntflat: [.] | inside([
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"struct sigaction",
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"struct iovec",
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"struct shmid_ds",
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"struct user_msghdr",
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"struct msgbuf",
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"stack_t",
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"struct sigevent",
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"struct kexec_segment",
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"struct robust_list_head",
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"struct mmsghdr",
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""
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]);
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def nimtype: rawtype |
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if . == "" then null
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# pointers
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elif endswith("*") then rtrimstr("*") | strim |
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if isflat then "pointer"
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elif isntflat then "pointer #[ TODO \(.) is not a flat type ]#"
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elif endswith("*") then "pointer #[ TODO \(.) is a nested pointer ]#"
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else error("\(.) is of dubious flatness!") end
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# scalar types
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elif startswith("enum") then "cint"
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elif [.] | inside(["int", "key_t", "pid_t", "clockid_t", "timer_t", "mqd_t", "__s32", "rwf_t"]) then "cint"
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elif [.] | inside(["size_t"]) then "csize_t"
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elif [.] | inside(["umode_t"]) then "cushort"
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elif [.] | inside(["unsigned int", "uid_t", "gid_t", "qid_t", "u32", "__u32"]) then "cuint"
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elif [.] | inside(["unsigned long", "off_t"]) then "clong"
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elif [.] | inside(["aio_context_t", "__u64"]) then "culong"
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elif [.] | inside(["loff_t"]) then "clonglong"
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elif [.] | inside(["key_serial_t"]) then "int32"
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elif [.] | inside(["cap_user_header_t", "cap_user_data_t"]) then "pointer"
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else error("\(.) is unknown as a nimtype") end;
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def nimstack: rawtype |
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if . == "" then null
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# pointers
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elif endswith("*") then rtrimstr("*") | strim |
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if isflat then "state.memory.raw_address(state.stack.pop.p)"
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elif isntflat then "nil # TODO \(.) is not a flat type"
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elif endswith("*") then "nil # TODO \(.) is a nested pointer"
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else error("\(.) is of dubious flatness!") end
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# scalar types
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elif startswith("enum") then "state.stack.pop.i.cint"
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elif [.] | inside(["int", "key_t", "pid_t", "clockid_t", "timer_t", "mqd_t", "__s32", "rwf_t"]) then "state.stack.pop.i.cint"
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elif [.] | inside(["size_t"]) then "state.stack.pop.u.csize_t"
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elif [.] | inside(["umode_t"]) then "state.stack.pop.i.cushort"
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elif [.] | inside(["unsigned int", "uid_t", "gid_t", "qid_t", "u32", "__u32"]) then "state.stack.pop.u.cuint"
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elif [.] | inside(["unsigned long", "off_t"]) then "state.stack.pop.i.clong"
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elif [.] | inside(["aio_context_t", "__u64"]) then "state.stack.pop.u.culong"
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elif [.] | inside(["loff_t"]) then "state.stack.pop.i.clonglong"
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elif [.] | inside(["key_serial_t"]) then "state.stack.pop.i.int32"
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elif [.] | inside(["cap_user_header_t", "cap_user_data_t"]) then "state.memory.raw_address(state.stack.pop.p)"
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else error("\(.) is unknown as a nimtype") end;
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def letstr: getargs | map("let syscall_\(.name | gsub("_"; "")): \(.type | nimtype) = \(.type | nimstack)") | join("\n");
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def argcomma: if ( getargs | length ) == 0 then "" else ", " end;
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def argstr: getargs | map("syscall_" + (.name | gsub("_"; ""))) | join(", ");
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.syscalls[] |
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" of \(.number): # \(csig)\n" +
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"\(letstr | indent(" "))\n" +
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" let retval: clong = syscall(\(.number)\(argcomma)\(argstr))\n" +
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" state.stack.add ArcticType(i: retval.int64)\n"
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@ -1,27 +0,0 @@
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#!/bin/bash
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if [ -e src/arctic/handle_syscalls.nim ]; then
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exit 0
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fi
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if [ ! -e syscalls.json ]; then
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curl 'https://syscalls.mebeim.net/db/x86/64/x64/v6.6/table.json' > syscalls.json
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fi
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cat <<EOF > src/arctic/handle_syscalls.nim
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import types
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import memory
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proc syscall(number: clong): clong {.importcpp: "syscall(@)", header: "<unistd.h>", varargs.}
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template handle_syscall*(state: var ArcticState, number: int64) =
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case number:
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EOF
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jq -r -f generate_handle_syscalls.jq < syscalls.json >> src/arctic/handle_syscalls.nim
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cat <<EOF >> src/arctic/handle_syscalls.nim
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else:
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# TODO: invalid syscall
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discard
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EOF
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