diff options
Diffstat (limited to 'lib/chaseccomp/gen_syscalls')
| -rwxr-xr-x | lib/chaseccomp/gen_syscalls | 36 |
1 files changed, 17 insertions, 19 deletions
diff --git a/lib/chaseccomp/gen_syscalls b/lib/chaseccomp/gen_syscalls index a4d7d5b5..401403d5 100755 --- a/lib/chaseccomp/gen_syscalls +++ b/lib/chaseccomp/gen_syscalls @@ -9,7 +9,7 @@ test "$1" || die "usage: gen_syscalls [file]" find_label() { printf '%s\n' "$labels" | while read -r line - do case $line in + do case "$line" in "$1 "*) printf '%d\n' "${line#* }" break ;; @@ -24,23 +24,19 @@ line_cut_next() { if test "$line" = "$oline"; then line= ; fi } -cut_label() { +put_cmp() { + line_cut_next + val=$next line_cut_next label=$(find_label "$next") test "$label" || die "missing label $next" label=$(($label - 1 - $ip)) -} - -put_cmp() { - line_cut_next - val=$next - cut_label - printf '\t%s(%s, %d),\n' "$inst" "$val" "$label" + printf '\t%s(%s, %d),\n' "$1" "$val" "$label" } put_load() { line_cut_next - printf '\t%s(%s),\n' "$inst" "$next" + printf '\tCHA_BPF_LOAD(%s),\n' "$next" } put_ret() { @@ -52,13 +48,13 @@ put_ret() { errno) val="SECCOMP_RET_ERRNO | ($line & SECCOMP_RET_DATA)" ;; *) die "wrong retval $line" ;; esac - printf '\t%s(%s),\n' "$inst" "$val" + printf '\tCHA_BPF_RET(%s),\n' "$val" } ip=0 while read -r line do line=${line%%#*} - case $line in + case "$line" in ''|define' '*) ;; ': '*) line_cut_next if test -n "$labels" @@ -76,13 +72,15 @@ while read -r line do line_cut_next case $next in :) continue ;; - define) printf '#%s %s\n' "$next $line" ; continue ;; - ret) inst=CHA_BPF_RET put_ret ;; - ifeq) inst=CHA_BPF_JE put_cmp ;; - ifne) inst=CHA_BPF_JNE put_cmp ;; - ifle) inst=CHA_BPF_JLE put_cmp ;; - load) inst=CHA_BPF_LOAD put_load ;; - *) die "unexpected instruction $inst" ;; + define) printf '#%s %s\n' "$next" "$line" ; continue ;; + ret) put_ret ;; + ifeq) put_cmp CHA_BPF_JE;; + ifne) put_cmp CHA_BPF_JNE;; + ifle) put_cmp CHA_BPF_JLE;; + load) put_load;; + *) die "unexpected instruction $next" ;; esac ip=$(($ip + 1)) done < "$1" + +printf '#define EXPECTED_COUNT %d\n' "$ip" |