Date: Tue, 28 Apr 1998 14:40:30 +1000 (EST) From: John Birrell <jb@cimlogic.com.au> To: bde@zeta.org.au Cc: committers@FreeBSD.ORG Subject: Syscall as weak symbols Message-ID: <199804280440.OAA17651@cimlogic.com.au>
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As part of a cleanup to things related to libc, I'd like to change
the SYSCALL macro to generate (something like) __syscall_name as
the non-weak symbol for the `name' syscall, and declare name as a
weak symbol so that an "nm -W write.o" gives:
00000008 T __syscall_write
U cerror
00000008 TW write
using:
#define SYSCALL(x) 2: PIC_PROLOGUE; jmp PIC_PLT(HIDENAME(cerror)); \
ENTRY(__CONCAT(_syscall_,x)); \
.weak x; .set x,__CONCAT(__syscall_,x); \
lea __CONCAT(SYS_,x),%eax; KERNCALL; jb 2b
This will allow the complexity of renaming syscalls for libc_r to be
removed. It is also a step towards cleaning up the user's namespace.
Comments?
--
John Birrell - jb@cimlogic.com.au; jb@freebsd.org http://www.cimlogic.com.au/
CIMlogic Pty Ltd, GPO Box 117A, Melbourne Vic 3001, Australia +61 418 353 137
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