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[MIPS] Add support for MIPS syscalls

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Change-Id: I4deba67e15c865c4c2db03064c04098a09828ea6
Signed-off-by: Raghu Gandham <raghu@mips.com>
Signed-off-by: Chris Dearman <chris@mips.com>
This commit is contained in:
Raghu Gandham
2012-01-27 17:51:42 -08:00
committed by Elliott Hughes
parent 7eb1cc23f8
commit 1fa0d84957
203 changed files with 5154 additions and 323 deletions
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103
libc/tools/gensyscalls.py
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@@ -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 @@ print "bionic_root is %s" % bionic_root
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 @@ thumb_call_long = thumb_header + """\
.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 @@ class State:
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 @@ class State:
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 @@ class State:
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 @@ class State:
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 @@ class State:
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 @@ class State:
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 @@ class State:
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 @@ class State:
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: