[klibc] [klibc:master] i386: remove special handling of socketcall
klibc-bot for H. Peter Anvin
hpa at linux.intel.com
Tue Jan 5 16:48:03 PST 2016
Commit-ID: 9b625887a59c03c244b43550b576529f209dde11
Gitweb: http://git.kernel.org/?p=libs/klibc/klibc.git;a=commit;h=9b625887a59c03c244b43550b576529f209dde11
Author: H. Peter Anvin <hpa at linux.intel.com>
AuthorDate: Tue, 5 Jan 2016 16:43:50 -0800
Committer: H. Peter Anvin <hpa at linux.intel.com>
CommitDate: Tue, 5 Jan 2016 16:43:50 -0800
[klibc] i386: remove special handling of socketcall
As of kernel 4.3, i386 now has direct system calls for sockets, so
drop the special handling for i386 socketcall. If built on older
kernels, it will still generate socketcall stubs although they will be
less efficient.
Signed-off-by: H. Peter Anvin <hpa at linux.intel.com>
---
usr/klibc/arch/i386/Kbuild | 2 +-
usr/klibc/arch/i386/socketcall.S | 55 ----------------------------------------
usr/klibc/socketcalls.pl | 49 ++++++++++++-----------------------
3 files changed, 17 insertions(+), 89 deletions(-)
diff --git a/usr/klibc/arch/i386/Kbuild b/usr/klibc/arch/i386/Kbuild
index edc7b3c..de237be 100644
--- a/usr/klibc/arch/i386/Kbuild
+++ b/usr/klibc/arch/i386/Kbuild
@@ -2,7 +2,7 @@
# klibc .o files for i386
#
-klib-y := socketcall.o setjmp.o syscall.o varsyscall.o
+klib-y := setjmp.o syscall.o varsyscall.o
klib-y += open.o openat.o vfork.o
klib-y += libgcc/__ashldi3.o libgcc/__ashrdi3.o libgcc/__lshrdi3.o
klib-y += libgcc/__muldi3.o libgcc/__negdi2.o
diff --git a/usr/klibc/arch/i386/socketcall.S b/usr/klibc/arch/i386/socketcall.S
deleted file mode 100644
index 44e2004..0000000
--- a/usr/klibc/arch/i386/socketcall.S
+++ /dev/null
@@ -1,55 +0,0 @@
-#
-# socketcall.S
-#
-# Socketcalls use the following convention:
-# %eax = __NR_socketcall
-# %ebx = socketcall number
-# %ecx = pointer to arguments (up to 6)
-#
-
-#include <asm/unistd.h>
-
-#ifdef __i386__
-
- .text
- .align 4
- .globl __socketcall_common
- .type __socketcall_common, @function
-
-__socketcall_common:
- xchgl %ebx,(%esp) # The stub passes the socketcall # on stack
-
-#ifdef _REGPARM
- pushl 16(%esp) # Arg 6
- pushl 16(%esp) # Arg 5
- pushl 16(%esp) # Arg 4
- pushl %ecx
- pushl %edx
- pushl %eax
- movl %esp,%ecx
-#else
- leal 8(%esp),%ecx # Arguments already contiguous on-stack
-#endif
-
- movl $__NR_socketcall,%eax
- call *__syscall_entry
-
-#ifdef _REGPARM
- addl $6*4, %esp
-#endif
-
- cmpl $-4095,%eax # Error return?
-
- popl %ebx
-
- jb 1f
-
- negl %eax
- movl %eax,errno
- orl $-1,%eax # Return -1
-1:
- ret
-
- .size __socketcall_common,.-__socketcall_common
-
-#endif
diff --git a/usr/klibc/socketcalls.pl b/usr/klibc/socketcalls.pl
index 3dac096..9df5949 100644
--- a/usr/klibc/socketcalls.pl
+++ b/usr/klibc/socketcalls.pl
@@ -42,44 +42,27 @@ while ( defined($line = <FILE>) ) {
$nargs = $i;
print " \\\n\t${name}.o";
- if ( $arch eq 'i386' ) {
- open(OUT, "> ${outputdir}/${name}.S")
- or die "$0: Cannot open ${outputdir}/${name}.S\n";
+ open(OUT, "> ${outputdir}/${name}.c")
+ or die "$0: Cannot open ${outputdir}/${name}.c\n";
- print OUT "#include <sys/socketcalls.h>\n";
- print OUT "\n";
- print OUT "\t.text\n";
- print OUT "\t.align 4\n";
- print OUT "\t.globl ${name}\n";
- print OUT "\t.type ${name},\@function\n";
- print OUT "${name}:\n";
- print OUT "\tpushl \$SYS_\U${name}\n";
- print OUT "\tjmp __socketcall_common\n";
- print OUT "\t.size ${name},.-${name}\n";
- close(OUT);
- } else {
- open(OUT, "> ${outputdir}/${name}.c")
- or die "$0: Cannot open ${outputdir}/${name}.c\n";
-
- print OUT "#include \"socketcommon.h\"\n";
- print OUT "\n";
- print OUT "#if _KLIBC_SYS_SOCKETCALL || !defined(__NR_${name})\n\n";
+ print OUT "#include \"socketcommon.h\"\n";
+ print OUT "\n";
+ print OUT "#if _KLIBC_SYS_SOCKETCALL || !defined(__NR_${name})\n\n";
- print OUT "extern long __socketcall(int, const unsigned long *);\n\n";
+ print OUT "extern long __socketcall(int, const unsigned long *);\n\n";
- print OUT "$type $name (", join(', ', @cargs), ")\n";
- print OUT "{\n";
- print OUT " unsigned long args[$nargs];\n";
- for ( $i = 0 ; $i < $nargs ; $i++ ) {
- print OUT " args[$i] = (unsigned long)a$i;\n";
- }
- print OUT " return ($type) __socketcall(SYS_\U${name}\E, args);\n";
- print OUT "}\n\n";
+ print OUT "$type $name (", join(', ', @cargs), ")\n";
+ print OUT "{\n";
+ print OUT " unsigned long args[$nargs];\n";
+ for ( $i = 0 ; $i < $nargs ; $i++ ) {
+ print OUT " args[$i] = (unsigned long)a$i;\n";
+ }
+ print OUT " return ($type) __socketcall(SYS_\U${name}\E, args);\n";
+ print OUT "}\n\n";
- print OUT "#endif\n";
+ print OUT "#endif\n";
- close(OUT);
- }
+ close(OUT);
} else {
die "$file:$.: Could not parse input\n";
}
More information about the klibc
mailing list