[MIPS] Add support for MIPS syscalls
Change-Id: I4deba67e15c865c4c2db03064c04098a09828ea6
Signed-off-by: Raghu Gandham <raghu@mips.com>
Signed-off-by: Chris Dearman <chris@mips.com>
diff --git a/libc/tools/gensyscalls.py b/libc/tools/gensyscalls.py
index bed9445..947e444 100755
--- a/libc/tools/gensyscalls.py
+++ b/libc/tools/gensyscalls.py
@@ -1,11 +1,12 @@
#!/usr/bin/python
#
-# this tool is used to generate the syscall assmbler templates
-# to be placed into arch-x86/syscalls, as well as the content
-# of arch-x86/linux/_syscalls.h
+# this tool is used to generate the syscall assembler templates
+# to be placed into arch-{arm,x86,mips}/syscalls, as well as the content
+# of arch-{arm,x86,mips}/linux/_syscalls.h
#
import sys, os.path, glob, re, commands, filecmp, shutil
+import getpass
from bionic_utils import *
@@ -31,9 +32,10 @@
bionic_temp = "/tmp/bionic_gensyscalls/"
# all architectures, update as you see fit
-all_archs = [ "arm", "x86" ]
+all_archs = [ "arm", "x86", "mips" ]
def make_dir( path ):
+ path = os.path.abspath(path)
if not os.path.exists(path):
parent = os.path.dirname(path)
if parent:
@@ -183,6 +185,32 @@
.fnend
"""
+# mips assembler templates for each syscall stub
+#
+mips_call = """/* autogenerated by gensyscalls.py */
+#include <sys/linux-syscalls.h>
+ .text
+ .globl %(fname)s
+ .align 4
+ .ent %(fname)s
+
+%(fname)s:
+ .set noreorder
+ .cpload $t9
+ li $v0, %(idname)s
+ syscall
+ bnez $a3, 1f
+ move $a0, $v0
+ j $ra
+ nop
+1:
+ la $t9,__set_errno
+ j $t9
+ nop
+ .set reorder
+ .end %(fname)s
+"""
+
def param_uses_64bits(param):
"""Returns True iff a syscall parameter description corresponds
to a 64-bit type."""
@@ -331,6 +359,10 @@
return thumb_call_long % t
return thumb_call_default % t
+ def mips_genstub(self,fname, idname):
+ t = { "fname" : fname,
+ "idname" : idname }
+ return mips_call % t
def superh_genstub(self, fname, flags, idname):
numargs = int(flags)
@@ -360,7 +392,7 @@
syscall_params = t["params"]
syscall_name = t["name"]
- if t["id"] >= 0:
+ if t["common"] >= 0 or t["armid"] >= 0:
num_regs = count_arm_param_registers(syscall_params)
if gen_thumb_stubs:
t["asm-thumb"] = self.thumb_genstub(syscall_func,num_regs,"__NR_"+syscall_name)
@@ -370,7 +402,7 @@
else:
t["asm-arm"] = self.arm_genstub(syscall_func,num_regs,"__NR_"+syscall_name)
- if t["id2"] >= 0:
+ if t["common"] >= 0 or t["x86id"] >= 0:
num_regs = count_generic_param_registers(syscall_params)
if t["cid"] >= 0:
t["asm-x86"] = self.x86_genstub_cid(syscall_func, num_regs, "__NR_"+syscall_name, t["cid"])
@@ -380,62 +412,70 @@
E("cid for dispatch syscalls is only supported for x86 in "
"'%s'" % syscall_name)
return
+ if t["common"] >= 0 or t["mipsid"] >= 0:
+ t["asm-mips"] = self.mips_genstub(syscall_func,"__NR_"+syscall_name)
def gen_NR_syscall(self,fp,name,id):
fp.write( "#define __NR_%-25s (__NR_SYSCALL_BASE + %d)\n" % (name,id) )
- # now dump the content of linux/_syscalls.h
+ # now dump the content of linux-syscalls.h
def gen_linux_syscalls_h(self):
path = "include/sys/linux-syscalls.h"
D( "generating "+path )
fp = create_file( path )
fp.write( "/* auto-generated by gensyscalls.py, do not touch */\n" )
fp.write( "#ifndef _BIONIC_LINUX_SYSCALLS_H_\n\n" )
- fp.write( "#if !defined __ASM_ARM_UNISTD_H && !defined __ASM_I386_UNISTD_H\n" )
+ fp.write( "#if !defined __ASM_ARM_UNISTD_H && !defined __ASM_I386_UNISTD_H && !defined __ASM_MIPS_UNISTD_H\n" )
fp.write( "#if defined __arm__ && !defined __ARM_EABI__ && !defined __thumb__\n" )
- fp.write( " # define __NR_SYSCALL_BASE 0x900000\n" )
- fp.write( " #else\n" )
- fp.write( " # define __NR_SYSCALL_BASE 0\n" )
- fp.write( " #endif\n\n" )
+ fp.write( " # define __NR_SYSCALL_BASE 0x900000\n" )
+ fp.write( "#elif defined(__mips__)\n" )
+ fp.write( " # define __NR_SYSCALL_BASE 4000\n" )
+ fp.write( "#else\n" )
+ fp.write( " # define __NR_SYSCALL_BASE 0\n" )
+ fp.write( "#endif\n\n" )
# first, all common syscalls
- for sc in self.syscalls:
- sc_id = sc["id"]
- sc_id2 = sc["id2"]
+ for sc in sorted(self.syscalls,key=lambda x:x["common"]):
+ sc_id = sc["common"]
sc_name = sc["name"]
- if sc_id == sc_id2 and sc_id >= 0:
+ if sc_id >= 0:
self.gen_NR_syscall( fp, sc_name, sc_id )
# now, all arm-specific syscalls
fp.write( "\n#ifdef __arm__\n" );
for sc in self.syscalls:
- sc_id = sc["id"]
- sc_id2 = sc["id2"]
+ sc_id = sc["armid"]
sc_name = sc["name"]
- if sc_id != sc_id2 and sc_id >= 0:
+ if sc_id >= 0:
self.gen_NR_syscall( fp, sc_name, sc_id )
fp.write( "#endif\n" );
gen_syscalls = {}
# finally, all i386-specific syscalls
fp.write( "\n#ifdef __i386__\n" );
- for sc in self.syscalls:
- sc_id = sc["id"]
- sc_id2 = sc["id2"]
+ for sc in sorted(self.syscalls,key=lambda x:x["x86id"]):
+ sc_id = sc["x86id"]
sc_name = sc["name"]
- if sc_id != sc_id2 and sc_id2 >= 0 and sc_name not in gen_syscalls:
- self.gen_NR_syscall( fp, sc_name, sc_id2 )
+ if sc_id >= 0 and sc_name not in gen_syscalls:
+ self.gen_NR_syscall( fp, sc_name, sc_id )
gen_syscalls[sc_name] = True
fp.write( "#endif\n" );
+ # all mips-specific syscalls
+ fp.write( "\n#ifdef __mips__\n" );
+ for sc in sorted(self.syscalls,key=lambda x:x["mipsid"]):
+ sc_id = sc["mipsid"]
+ if sc_id >= 0:
+ self.gen_NR_syscall( fp, sc["name"], sc_id )
+ fp.write( "#endif\n" );
+
fp.write( "\n#endif\n" )
fp.write( "\n#endif /* _BIONIC_LINUX_SYSCALLS_H_ */\n" );
fp.close()
self.other_files.append( path )
-
- # now dump the content of linux/_syscalls.h
+ # now dump the content of linux-syscalls.h
def gen_linux_unistd_h(self):
path = "include/sys/linux-unistd.h"
D( "generating "+path )
@@ -462,6 +502,7 @@
arch_test = {
"arm": lambda x: x.has_key("asm-arm") or x.has_key("asm-thumb"),
"x86": lambda x: x.has_key("asm-x86"),
+ "mips": lambda x: x.has_key("asm-mips")
}
for sc in self.syscalls:
@@ -471,6 +512,7 @@
fp.close()
self.other_files.append( path )
+
# now generate each syscall stub
def gen_syscall_stubs(self):
for sc in self.syscalls:
@@ -498,6 +540,13 @@
fp.close()
self.new_stubs.append( fname )
+ if sc.has_key("asm-mips") and 'mips' in all_archs:
+ fname = "arch-mips/syscalls/%s.S" % sc["func"]
+ D2( ">>> generating "+fname )
+ fp = create_file( fname )
+ fp.write(sc["asm-mips"])
+ fp.close()
+ self.new_stubs.append( fname )
def regenerate(self):
D( "scanning for existing architecture-specific stub files" )
@@ -515,7 +564,7 @@
if not os.path.exists( bionic_temp ):
D( "creating %s" % bionic_temp )
- os.mkdir( bionic_temp )
+ make_dir( bionic_temp )
# D( "p4 editing source files" )
# for arch in all_archs: