diff options
| author | Carlos O'Donell <carlos@systemhalted.org> | 2012-11-20 13:54:47 -0500 |
|---|---|---|
| committer | Carlos O'Donell <carlos@systemhalted.org> | 2012-11-20 14:40:34 -0500 |
| commit | 105ce2ce621b79ebad13e307fb14ef8163cf7a44 (patch) | |
| tree | 8bb1ded54861c88f253cea9c31a675697e7b96f4 /sysdeps | |
| parent | d072f3f7724d85ceaf230806660235f0cf2f9c3b (diff) | |
Document syscall signature prefixes in sysdep/unix/make-syscalls.sh
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/unix/make-syscalls.sh | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/sysdeps/unix/make-syscalls.sh b/sysdeps/unix/make-syscalls.sh index 7e7de65f3a..f7162e2186 100644 --- a/sysdeps/unix/make-syscalls.sh +++ b/sysdeps/unix/make-syscalls.sh @@ -4,8 +4,19 @@ # Expects $sysdirs in environment. ############################################################################## - -# Syscall Signature Key Letters for BP Thunks: +# +# This script is used to process the syscall data encoded in the various +# syscalls.list files to produce thin assembly syscall wrappers around the +# appropriate OS syscall. See syscall-template.s for more details on the +# actual wrapper. +# +# Syscall Signature Prefixes: +# +# C: cancellable (i.e., this syscall is a cancellation point) +# E: errno and return value are not set by the call +# V: errno is not set, but errno or zero (success) is returned from the call +# +# Syscall Signature Key Letters: # # a: unchecked address (e.g., 1st arg to mmap) # b: non-NULL buffer (e.g., 2nd arg to read; return value from mmap) @@ -23,6 +34,7 @@ # v: vararg scalar (e.g., optional 3rd arg to open) # V: byte-per-page vector (3rd arg to mincore) # W: wait status, optionally-NULL pointer to int (e.g., 2nd arg of wait4) +# ptr='[abBfFINpPsSWV]' # all pointer keyletters int='[inv]' # all scalar keyletters |