generic-library/bionic
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

Remove dead code from gensyscalls.py.

Browse Source 
Change-Id: I0df69f8fd990f829ccbfcd5123c17b523d5a4d45
This commit is contained in:
Elliott Hughes 2013-02-07 14:07:00 -08:00
parent f6afd3b670
commit cd6780b167
1 changed files with 13 additions and 117 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

130
libc/tools/gensyscalls.py
View File

@ -10,12 +10,6 @@ import getpass
from bionic_utils import * from bionic_utils import *
# set this to 1 if you want to generate thumb stubs
gen_thumb_stubs = 0
# set this to 1 if you want to generate ARM EABI stubs
gen_eabi_stubs = 1
# get the root Bionic directory, simply this script's dirname # get the root Bionic directory, simply this script's dirname
# #
bionic_root = find_bionic_root() bionic_root = find_bionic_root()
@ -32,7 +26,7 @@ print "bionic_root is %s" % bionic_root
bionic_temp = "/tmp/bionic_gensyscalls/" bionic_temp = "/tmp/bionic_gensyscalls/"
# all architectures, update as you see fit # all architectures, update as you see fit
all_archs = [ "arm", "x86", "mips" ] all_archs = [ "arm", "mips", "x86" ]
def make_dir( path ): def make_dir( path ):
path = os.path.abspath(path) path = os.path.abspath(path)
@ -47,6 +41,7 @@ def create_file( relpath ):
make_dir(dir) make_dir(dir)
return open( bionic_temp + relpath, "w" ) return open( bionic_temp + relpath, "w" )
#
# x86 assembler templates for each syscall stub # x86 assembler templates for each syscall stub
# #
@ -75,8 +70,10 @@ x86_return = """ ret
END(%(fname)s) END(%(fname)s)
""" """
#
# ARM assembler templates for each syscall stub # ARM assembler templates for each syscall stub
# #
arm_header = """/* autogenerated by gensyscalls.py */ arm_header = """/* autogenerated by gensyscalls.py */
#include <machine/asm.h> #include <machine/asm.h>
#include <sys/linux-syscalls.h> #include <sys/linux-syscalls.h>
@ -84,29 +81,6 @@ arm_header = """/* autogenerated by gensyscalls.py */
ENTRY(%(fname)s) ENTRY(%(fname)s)
""" """
arm_footer = """\
END(%(fname)s)
"""
arm_call_default = arm_header + """\
swi #%(idname)s
movs r0, r0
bxpl lr
b __set_syscall_errno
""" + arm_footer
arm_call_long = arm_header + """\
.save {r4, r5, lr}
stmfd sp!, {r4, r5, lr}
ldr r4, [sp, #12]
ldr r5, [sp, #16]
swi # %(idname)s
ldmfd sp!, {r4, r5, lr}
movs r0, r0
bxpl lr
b __set_syscall_errno
""" + arm_footer
arm_eabi_call_default = arm_header + """\ arm_eabi_call_default = arm_header + """\
mov ip, r7 mov ip, r7
ldr r7, =%(idname)s ldr r7, =%(idname)s
@ -115,7 +89,8 @@ arm_eabi_call_default = arm_header + """\
movs r0, r0 movs r0, r0
bxpl lr bxpl lr
b __set_syscall_errno b __set_syscall_errno
""" + arm_footer END(%(fname)s)
"""
arm_eabi_call_long = arm_header + """\ arm_eabi_call_long = arm_header + """\
mov ip, sp mov ip, sp
@ -128,61 +103,13 @@ arm_eabi_call_long = arm_header + """\
movs r0, r0 movs r0, r0
bxpl lr bxpl lr
b __set_syscall_errno b __set_syscall_errno
""" + arm_footer END(%(fname)s)
"""
# ARM thumb assembler templates for each syscall stub
# #
thumb_header = """/* autogenerated by gensyscalls.py */
.text
.type %(fname)s, #function
.globl %(fname)s
.align 4
.thumb_func
.fnstart
#define __thumb__
#include <sys/linux-syscalls.h>
%(fname)s:
"""
thumb_call_default = thumb_header + """\
.save {r7,lr}
push {r7,lr}
ldr r7, =%(idname)s
swi #0
tst r0, r0
bmi 1f
pop {r7,pc}
1:
neg r0, r0
ldr r1, =__set_errno
blx r1
pop {r7,pc}
.fnend
"""
thumb_call_long = thumb_header + """\
.save {r4,r5,r7,lr}
push {r4,r5,r7,lr}
ldr r4, [sp,#16]
ldr r5, [sp,#20]
ldr r7, =%(idname)s
swi #0
tst r0, r0
bmi 1f
pop {r4,r5,r7,pc}
1:
neg r0, r0
ldr r1, =__set_errno
blx r1
pop {r4,r5,r7,pc}
.fnend
"""
# mips assembler templates for each syscall stub # mips assembler templates for each syscall stub
# #
mips_call = """/* autogenerated by gensyscalls.py */ mips_call = """/* autogenerated by gensyscalls.py */
#include <sys/linux-syscalls.h> #include <sys/linux-syscalls.h>
.text .text
@ -229,7 +156,7 @@ def param_uses_64bits(param):
def count_arm_param_registers(params): def count_arm_param_registers(params):
"""This function is used to count the number of register used """This function is used to count the number of register used
to pass parameters when invoking a thumb or ARM system call. to pass parameters when invoking an ARM system call.
This is because the ARM EABI mandates that 64-bit quantities This is because the ARM EABI mandates that 64-bit quantities
must be passed in an even+odd register pair. So, for example, must be passed in an even+odd register pair. So, for example,
something like: something like:
@ -326,15 +253,6 @@ class State:
result += x86_return % t result += x86_return % t
return result return result
def arm_genstub(self,fname, flags, idname):
t = { "fname" : fname,
"idname" : idname }
if flags:
numargs = int(flags)
if numargs > 4:
return arm_call_long % t
return arm_call_default % t
def arm_eabi_genstub(self,fname, flags, idname): def arm_eabi_genstub(self,fname, flags, idname):
t = { "fname" : fname, t = { "fname" : fname,
@ -346,15 +264,6 @@ class State:
return arm_eabi_call_default % t return arm_eabi_call_default % t
def thumb_genstub(self,fname, flags, idname):
t = { "fname" : fname,
"idname" : idname }
if flags:
numargs = int(flags)
if numargs > 4:
return thumb_call_long % t
return thumb_call_default % t
def mips_genstub(self,fname, idname): def mips_genstub(self,fname, idname):
t = { "fname" : fname, t = { "fname" : fname,
"idname" : idname } "idname" : idname }
@ -373,13 +282,7 @@ class State:
if t["common"] >= 0 or t["armid"] >= 0: if t["common"] >= 0 or t["armid"] >= 0:
num_regs = count_arm_param_registers(syscall_params) num_regs = count_arm_param_registers(syscall_params)
if gen_thumb_stubs: t["asm-arm"] = self.arm_eabi_genstub(syscall_func,num_regs,"__NR_"+syscall_name)
t["asm-thumb"] = self.thumb_genstub(syscall_func,num_regs,"__NR_"+syscall_name)
else:
if gen_eabi_stubs:
t["asm-arm"] = self.arm_eabi_genstub(syscall_func,num_regs,"__NR_"+syscall_name)
else:
t["asm-arm"] = self.arm_genstub(syscall_func,num_regs,"__NR_"+syscall_name)
if t["common"] >= 0 or t["x86id"] >= 0: if t["common"] >= 0 or t["x86id"] >= 0:
num_regs = count_generic_param_registers(syscall_params) num_regs = count_generic_param_registers(syscall_params)
@ -391,6 +294,7 @@ class State:
E("cid for dispatch syscalls is only supported for x86 in " E("cid for dispatch syscalls is only supported for x86 in "
"'%s'" % syscall_name) "'%s'" % syscall_name)
return return
if t["common"] >= 0 or t["mipsid"] >= 0: if t["common"] >= 0 or t["mipsid"] >= 0:
t["asm-mips"] = self.mips_genstub(syscall_func,"__NR_"+syscall_name) t["asm-mips"] = self.mips_genstub(syscall_func,"__NR_"+syscall_name)
@ -464,7 +368,7 @@ class State:
fp.write( "# auto-generated by gensyscalls.py, do not touch\n" ) fp.write( "# auto-generated by gensyscalls.py, do not touch\n" )
fp.write( "syscall_src := \n" ) fp.write( "syscall_src := \n" )
arch_test = { arch_test = {
"arm": lambda x: x.has_key("asm-arm") or x.has_key("asm-thumb"), "arm": lambda x: x.has_key("asm-arm"),
"x86": lambda x: x.has_key("asm-x86"), "x86": lambda x: x.has_key("asm-x86"),
"mips": lambda x: x.has_key("asm-mips") "mips": lambda x: x.has_key("asm-mips")
} }
@ -488,14 +392,6 @@ class State:
fp.close() fp.close()
self.new_stubs.append( fname ) self.new_stubs.append( fname )
if sc.has_key("asm-thumb") and 'arm' in all_archs:
fname = "arch-arm/syscalls/%s.S" % sc["func"]
D2( ">>> generating "+fname )
fp = create_file( fname )
fp.write(sc["asm-thumb"])
fp.close()
self.new_stubs.append( fname )
if sc.has_key("asm-x86") and 'x86' in all_archs: if sc.has_key("asm-x86") and 'x86' in all_archs:
fname = "arch-x86/syscalls/%s.S" % sc["func"] fname = "arch-x86/syscalls/%s.S" % sc["func"]
D2( ">>> generating "+fname ) D2( ">>> generating "+fname )