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| author | kib <kib@FreeBSD.org> | 2010-06-28 18:06:46 +0000 |
|---|---|---|
| committer | kib <kib@FreeBSD.org> | 2010-06-28 18:06:46 +0000 |
| commit | b6d8416eac525c06902bf03315b88189e10545e3 (patch) | |
| tree | 2ffebda973ea179d4a39ddccaf5d3e9279811ad0 /sys/kern/makesyscalls.sh | |
| parent | 2774f04de78aab6af0f10e1129f45bf8be19aae5 (diff) | |
| download | FreeBSD-src-b6d8416eac525c06902bf03315b88189e10545e3.zip FreeBSD-src-b6d8416eac525c06902bf03315b88189e10545e3.tar.gz | |
Count number of threads that enter and leave dynamically registered
syscalls. On the dynamic syscall deregistration, wait until all
threads leave the syscall code. This somewhat increases the safety
of the loadable modules unloading.
Reviewed by: jhb
Tested by: pho
MFC after: 1 month
Diffstat (limited to 'sys/kern/makesyscalls.sh')
| -rw-r--r-- | sys/kern/makesyscalls.sh | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/sys/kern/makesyscalls.sh b/sys/kern/makesyscalls.sh index 4e55f96..46e04fc 100644 --- a/sys/kern/makesyscalls.sh +++ b/sys/kern/makesyscalls.sh @@ -253,6 +253,10 @@ s/\$//g f=4 # toss number, type, audit event argc= 0; argssize = "0" + thr_flag = "SY_THR_STATIC" + if (flag("NOTSTATIC")) { + thr_flag = "SY_THR_ABSENT" + } if ($NF != "}") { funcalias=$(NF-2) argalias=$(NF-1) @@ -401,10 +405,10 @@ s/\$//g printf("\t{ %s, (sy_call_t *)", argssize) > sysent column = 8 + 2 + length(argssize) + 15 if (flag("NOSTD")) { - printf("%s },", "lkmressys, AUE_NULL, NULL, 0, 0, 0") > sysent + printf("%s },", "lkmressys, AUE_NULL, NULL, 0, 0, 0, SY_THR_ABSENT") > sysent column = column + length("lkmressys") + length("AUE_NULL") + 3 } else { - printf("%s, %s, NULL, 0, 0, %s },", funcname, auditev, flags) > sysent + printf("%s, %s, NULL, 0, 0, %s, %s },", funcname, auditev, flags, thr_flag) > sysent column = column + length(funcname) + length(auditev) + length(flags) + 3 } align_sysent_comment(column) @@ -472,13 +476,13 @@ s/\$//g prefix, funcname, auditev) > sysaue } if (flag("NOSTD")) { - printf("\t{ %s, (sy_call_t *)%s, %s, NULL, 0, 0, 0 },", + printf("\t{ %s, (sy_call_t *)%s, %s, NULL, 0, 0, 0, SY_THR_ABSENT },", "0", "lkmressys", "AUE_NULL") > sysent align_sysent_comment(8 + 2 + length("0") + 15 + \ length("lkmressys") + length("AUE_NULL") + 3) } else { - printf("\t{ %s(%s,%s), %s, NULL, 0, 0, %s },", - wrap, argssize, funcname, auditev, flags) > sysent + printf("\t{ %s(%s,%s), %s, NULL, 0, 0, %s, %s },", + wrap, argssize, funcname, auditev, flags, thr_flag) > sysent align_sysent_comment(8 + 9 + length(argssize) + 1 + \ length(funcname) + length(auditev) + \ length(flags) + 4) @@ -498,7 +502,7 @@ s/\$//g next } type("OBSOL") { - printf("\t{ 0, (sy_call_t *)nosys, AUE_NULL, NULL, 0, 0, 0 },") > sysent + printf("\t{ 0, (sy_call_t *)nosys, AUE_NULL, NULL, 0, 0, 0, SY_THR_ABSENT },") > sysent align_sysent_comment(34) printf("/* %d = obsolete %s */\n", syscall, comment) > sysent printf("\t\"obs_%s\",\t\t\t/* %d = obsolete %s */\n", @@ -509,7 +513,7 @@ s/\$//g next } type("UNIMPL") { - printf("\t{ 0, (sy_call_t *)nosys, AUE_NULL, NULL, 0, 0, 0 },\t\t\t/* %d = %s */\n", + printf("\t{ 0, (sy_call_t *)nosys, AUE_NULL, NULL, 0, 0, 0, SY_THR_ABSENT },\t\t\t/* %d = %s */\n", syscall, comment) > sysent printf("\t\"#%d\",\t\t\t/* %d = %s */\n", syscall, syscall, comment) > sysnames |
