3rd-party/linux-kernel-module-cheat
1
0
Fork 0
mirror of https://github.com/cirosantilli/linux-kernel-module-cheat.git synced 2026-01-22 17:55:57 +01:00
Code Issues Releases Wiki Activity

dhrystone baremetal!!!

Browse Source 
Factor out --optimization-level and --static to all builds

More conventionally set argv[0] to be the basename of the image.

Fix https://github.com/cirosantilli/linux-kernel-module-cheat/issues/90
This commit is contained in:
Ciro Santilli 六四事件 法轮功
2020-04-02 03:00:02 +00:00
parent b7887ac06b
commit 66473201eb
9 changed files with 136 additions and 100 deletions
Download Patch File Download Diff File Expand all files Collapse all files

129
common.py
View File

@@ -530,7 +530,7 @@ https://cirosantilli.com/linux-kernel-module-cheat#gem5-arm-platforms
default=True,
help='''\
Copy userland build outputs to the overlay directory which will be put inside
the image. If not given explicitly, this is disabled automatically when certain
the disk image. If not given explicitly, this is disabled automatically when certain
options are given, for example --static, since users don't usually want
static executables to be placed in the final image, but rather only for
user mode simulations in simulators that don't support dynamic linking like gem5.
@@ -1013,12 +1013,17 @@ Incompatible archs are skipped.
# Userland
env['userland_source_arch_arch_dir'] = join(env['userland_source_arch_dir'], env['arch'])
if env['in_tree']:
env['userland_build_dir'] = self.env['userland_source_dir']
env['userland_build_dir'] = env['userland_source_dir']
else:
env['userland_build_dir'] = join(env['out_dir'], 'userland', env['userland_build_id'], env['arch'])
env['package'] = set(env['package'])
if not env['_args_given']['copy_overlay']:
if self.env['in_tree'] or self.env['static'] or self.env['host']:
if (
env['in_tree'] or
env['static'] or
env['host'] or
env['mode'] == 'baremetal'
):
env['copy_overlay'] = False
# Kernel modules.
@@ -1048,35 +1053,43 @@ Incompatible archs are skipped.
env['baremetal_syscalls_basename_noext'] = 'syscalls'
env['baremetal_syscalls_src'] = os.path.join(
env['baremetal_source_lib_dir'],
env['baremetal_syscalls_basename_noext'] + self.env['c_ext']
env['baremetal_syscalls_basename_noext'] + env['c_ext']
)
env['baremetal_syscalls_obj'] = os.path.join(
self.env['baremetal_build_lib_dir'],
env['baremetal_syscalls_basename_noext'] + self.env['obj_ext']
env['baremetal_build_lib_dir'],
env['baremetal_syscalls_basename_noext'] + env['obj_ext']
)
env['baremetal_syscalls_asm_src'] = os.path.join(
self.env['baremetal_source_lib_dir'],
env['baremetal_syscalls_basename_noext'] + '_asm' + self.env['asm_ext']
env['baremetal_source_lib_dir'],
env['baremetal_syscalls_basename_noext'] + '_asm' + env['asm_ext']
)
env['baremetal_syscalls_asm_obj'] = os.path.join(
self.env['baremetal_build_lib_dir'],
env['baremetal_syscalls_basename_noext'] + '_asm' + self.env['obj_ext']
env['baremetal_build_lib_dir'],
env['baremetal_syscalls_basename_noext'] + '_asm' + env['obj_ext']
)
if env['emulator'] == 'gem5':
if env['machine'] == 'VExpress_GEM5_V1':
env['entry_address'] = 0x80000000
env['uart_address'] = 0x1c090000
elif self.env['machine'] == 'RealViewPBX':
elif env['machine'] == 'RealViewPBX':
env['entry_address'] = 0x10000
env['uart_address'] = 0x10009000
else:
raise Exception('unknown machine: ' + self.env['machine'])
raise Exception('unknown machine: ' + env['machine'])
else:
env['entry_address'] = 0x40000000
env['uart_address']= 0x09000000
env['uart_address'] = 0x09000000
env['common_basename_noext'] = env['repo_short_id']
env['baremetal_extra_obj_bootloader'] = join(
env['baremetal_build_lib_dir'],
'bootloader{}'.format(env['obj_ext'])
)
env['baremetal_extra_obj_lkmc_common'] = join(
env['baremetal_build_lib_dir'],
env['common_basename_noext'] + env['obj_ext']
)
# Userland / baremetal common source.
env['common_basename_noext'] = env['repo_short_id']
env['common_c'] = os.path.join(
env['root_dir'],
env['common_basename_noext'] + env['c_ext']
@@ -1087,8 +1100,38 @@ Incompatible archs are skipped.
)
if env['mode'] == 'baremetal':
env['build_dir'] = env['baremetal_build_dir']
env['extra_objs'] = [
env['baremetal_extra_obj_bootloader'],
env['baremetal_extra_obj_lkmc_common'],
env['baremetal_syscalls_asm_obj'],
env['baremetal_syscalls_obj'],
]
env['ccflags_default'] = [
'-nostartfiles', LF,
]
if env['arch'] == 'arm':
env['ccflags_default'].extend([
'-mhard-float', LF,
# This uses the soft float ABI for calling functions from objets in Newlib which
# our crosstool-NG config compiles with soft floats, while emiting hard float
# from C and allowing us to use it from assembly, e.g. for the VMRS instruction:
# which would otherwise fail "with selected processor does not support XXX in ARM mode"
# Bibliography:
# - https://stackoverflow.com/questions/9753749/arm-compilation-error-vfp-registered-used-by-executable-not-object-file
# - https://stackoverflow.com/questions/41131432/cross-compiling-error-selected-processor-does-not-support-fmrx-r3-fpexc-in/41131782#41131782
# - https://embeddedartistry.com/blog/2017/10/9/r1q7pksku2q3gww9rpqef0dnskphtc
'-mfloat-abi=softfp', LF,
'-mfpu=crypto-neon-fp-armv8', LF,
])
env['ldflags'] = [
'-Wl,--section-start=.text={:#x}'.format(env['entry_address']), LF,
'-T', env['baremetal_link_script'], LF,
]
else:
env['build_dir'] = env['userland_build_dir']
env['ccflags_default'] = []
env['extra_objs'] = []
env['ldflags'] = []
# Docker
env['docker_build_dir'] = join(env['out_dir'], 'docker', env['arch'])
@@ -1247,25 +1290,6 @@ lunch aosp_{}-eng
)
)
@staticmethod
def python_escape_double_quotes(s):
s2 = []
for c in s:
if c == '"':
s2.append('\\"')
else:
s2.append(c)
return ''.join(s2)
@staticmethod
def python_struct_int_format(size):
if size == 4:
return 'i'
elif size == 8:
return 'Q'
else:
raise 'unknown size {}'.format(size)
def get_elf_entry(self, elf_file_path):
readelf_header = self.sh.check_output([
self.get_toolchain_tool('readelf'),
@@ -1449,11 +1473,11 @@ lunch aosp_{}-eng
env['_args_given']['emulators'] = True
env['all_emulators'] = False
self.env = env.copy()
self._init_env(self.env)
self.sh = shell_helpers.ShellHelpers(
dry_run=self.env['dry_run'],
quiet=(not show_cmds),
)
self._init_env(self.env)
self.setup_one()
ret = self.timed_main()
if not env['dry_run']:
@@ -1487,6 +1511,25 @@ lunch aosp_{}-eng
os.makedirs(self.env['p9_dir'], exist_ok=True)
os.makedirs(self.env['qemu_run_dir'], exist_ok=True)
@staticmethod
def python_escape_double_quotes(s):
s2 = []
for c in s:
if c == '"':
s2.append('\\"')
else:
s2.append(c)
return ''.join(s2)
@staticmethod
def python_struct_int_format(size):
if size == 4:
return 'i'
elif size == 8:
return 'Q'
else:
raise 'unknown size {}'.format(size)
@staticmethod
def seconds_to_hms(seconds):
'''
@@ -1906,6 +1949,24 @@ after configure, e.g. SCons. Usually contains specific targets or other build fl
return True
return False
def setup_one(self):
ccflags = []
ccflags.extend(self.env['ccflags_default'])
if 'optimization_level' in self.env:
ccflags.extend(['-O{}'.format(self.env['optimization_level']), LF])
if self.env['static']:
ccflags.extend(['-static', LF])
if 'ccflags' in self.env:
ccflags.extend(self.sh.shlex_split(self.env['ccflags']))
self.env['ccflags'] = ccflags
self.setup_one_build()
def setup_one_build(self):
'''
Called once before every build type, after BuildCliFunction::setup_one
'''
pass
def timed_main(self):
'''
Parse CLI, and to the build based on it.