mirror of
https://github.com/cirosantilli/linux-kernel-module-cheat.git
synced 2026-01-23 02:05:57 +01:00
baremetal: only rebuild required files based on mtime
Move multcore test up with bootloader.
This commit is contained in:
Ciro Santilli 六四事件 法轮功
10
README.adoc
10
README.adoc
@@ -1589,7 +1589,9 @@ See also: https://github.com/cirosantilli/linux-kernel-module-cheat/issues/19
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The implementation is described at: https://stackoverflow.com/questions/46415059/how-to-observe-aarch64-system-registers-in-qemu/53043044#53043044
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=== GDB step debug multicore
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=== GDB step debug multicore userland
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For a more minimal baremetal multicore setup, see: <<arm-multicore>>.
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We can set and get which cores the Linux kernel allows a program to run on with `sched_getaffinity` and `sched_setaffinity`:
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@@ -10510,13 +10512,13 @@ output:
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==== ARM multicore
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TODO get working: CPU1 not waking up:
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TODO get working: CPU 1 not waking up:
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....
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./run --arch aarch64 --baremetal arch/aarch64/no_bootloader/multicore
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./run --arch aarch64 --baremetal arch/aarch64/multicore --cpus 2
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....
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Source: link:baremetal/arch/aarch64/no_bootloader/multicore.S[]
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Source: link:baremetal/arch/aarch64/multicore.S[]
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CPU 0 of this program enters a spinlock loop: it repeatedly checks if a given memory address is `1`.
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@@ -1,7 +1,7 @@
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/* https://github.com/cirosantilli/linux-kernel-module-cheat#arm-multicore */
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.global mystart
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mystart:
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.global main
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main:
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/* Reset spinlock. */
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mov x0, #0
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ldr x1, =spinlock
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@@ -21,15 +21,7 @@ mystart:
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ldr x0, spinlock
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cbz x0, 1b
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/* Semihost exit. */
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mov x1, #0x26
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movk x1, #2, lsl #16
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str x1, [sp,#0]
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mov x0, #0
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str x0, [sp,#8]
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mov x1, sp
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mov w0, #0x18
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hlt 0xf000
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ret
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spinlock:
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.skip 8
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@@ -44,29 +44,32 @@ class BaremetalComponent(common.Component):
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uart_address = 0x09000000
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os.makedirs(build_dir, exist_ok=True)
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os.makedirs(common.baremetal_build_lib_dir, exist_ok=True)
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common.run_cmd(
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[gcc, common.Newline] +
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cflags +
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[
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'-c', common.Newline,
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'-o', bootloader_obj, common.Newline,
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os.path.join(common.baremetal_src_lib_dir, '{}{}'.format(args.arch, common.asm_ext)), common.Newline,
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]
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)
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for src, obj in [
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(common_src, common_obj),
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(syscalls_src, syscalls_obj),
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]:
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src = os.path.join(common.baremetal_src_lib_dir, '{}{}'.format(args.arch, common.asm_ext))
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if common.need_rebuild([src], bootloader_obj):
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common.run_cmd(
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[gcc, common.Newline] +
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cflags +
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[
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'-c', common.Newline,
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'-D', 'UART0_ADDR={:#x}'.format(uart_address), common.Newline,
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'-o', obj, common.Newline,
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'-o', bootloader_obj, common.Newline,
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src, common.Newline,
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]
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)
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for src, obj in [
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(common_src, common_obj),
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(syscalls_src, syscalls_obj),
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]:
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if common.need_rebuild([src], obj):
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common.run_cmd(
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[gcc, common.Newline] +
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cflags +
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[
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'-c', common.Newline,
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'-D', 'UART0_ADDR={:#x}'.format(uart_address), common.Newline,
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'-o', obj, common.Newline,
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src, common.Newline,
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]
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)
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self._build_dir(
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'',
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gcc=gcc,
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@@ -137,38 +140,39 @@ Build the baremetal examples with crosstool-NG.
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in_dir = os.path.join(common.baremetal_src_dir, subpath)
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out_dir = os.path.join(common.baremetal_build_dir, subpath)
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os.makedirs(out_dir, exist_ok=True)
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common_objs = common_objs.copy()
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if bootloader:
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bootloader_cmd = [bootloader_obj, common.Newline]
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else:
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bootloader_cmd = []
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common_objs.append(bootloader_obj)
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for in_basename in os.listdir(in_dir):
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in_path = os.path.join(in_dir, in_basename)
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if os.path.isfile(in_path) and os.path.splitext(in_basename)[1] in (common.c_ext, common.asm_ext):
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in_name = os.path.splitext(in_basename)[0]
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main_obj = os.path.join(common.baremetal_build_dir, subpath, '{}{}'.format(in_name, common.obj_ext))
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common.run_cmd(
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[gcc, common.Newline] +
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cflags +
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[
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'-c', common.Newline,
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'-o', main_obj, common.Newline,
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os.path.join(common.baremetal_src_dir, in_path), common.Newline,
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]
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)
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common.run_cmd(
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[gcc, common.Newline] +
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cflags +
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[
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'-Wl,--section-start=.text={:#x}'.format(entry_address), common.Newline,
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'-o', os.path.join(common.baremetal_build_dir, subpath, in_name + common.baremetal_build_ext), common.Newline,
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'-T', os.path.join(common.baremetal_src_dir, 'link.ld'), common.Newline,
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] +
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bootloader_cmd +
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common.add_newlines(common_objs) +
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[
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main_obj, common.Newline,
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]
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)
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src = os.path.join(common.baremetal_src_dir, in_path)
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if common.need_rebuild([src], main_obj):
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common.run_cmd(
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[gcc, common.Newline] +
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cflags +
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[
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'-c', common.Newline,
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'-o', main_obj, common.Newline,
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src, common.Newline,
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]
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)
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objs = common_objs + [main_obj]
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out = os.path.join(common.baremetal_build_dir, subpath, in_name + common.baremetal_build_ext)
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link_script = os.path.join(common.baremetal_src_dir, 'link.ld')
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if common.need_rebuild(objs + [link_script], out):
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common.run_cmd(
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[gcc, common.Newline] +
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cflags +
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[
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'-Wl,--section-start=.text={:#x}'.format(entry_address), common.Newline,
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'-o', out, common.Newline,
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'-T', link_script, common.Newline,
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] +
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common.add_newlines(objs)
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)
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if __name__ == '__main__':
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BaremetalComponent().build()
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82
common.py
82
common.py
@@ -193,6 +193,39 @@ def write_string_to_file(path, string, mode='w'):
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with open(path, 'a') as f:
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f.write(string)
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def cmd_to_string(cmd, cwd=None, extra_env=None, extra_paths=None):
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'''
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Format a command given as a list of strings so that it can
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be viewed nicely and executed by bash directly and print it to stdout.
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'''
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last_newline = ' \\\n'
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newline_separator = last_newline + ' '
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out = []
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if extra_env is None:
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extra_env = {}
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if cwd is not None:
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out.append('cd {} &&'.format(shlex.quote(cwd)))
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if extra_paths is not None:
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out.append('PATH="{}:${{PATH}}"'.format(':'.join(extra_paths)))
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for key in extra_env:
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out.append('{}={}'.format(shlex.quote(key), shlex.quote(extra_env[key])))
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cmd_quote = []
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newline_count = 0
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for arg in cmd:
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if arg == common.Newline:
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cmd_quote.append(arg)
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newline_count += 1
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else:
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cmd_quote.append(shlex.quote(arg))
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if newline_count > 0:
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cmd_quote = [' '.join(list(y)) for x, y in itertools.groupby(cmd_quote, lambda z: z == common.Newline) if not x]
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out.extend(cmd_quote)
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if newline_count == 1 and cmd[-1] == common.Newline:
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ending = ''
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else:
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ending = last_newline + ';'
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return newline_separator.join(out) + ending
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def copy_dir_if_update_non_recursive(srcdir, destdir, filter_ext=None):
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# TODO print rsync equivalent.
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os.makedirs(destdir, exist_ok=True)
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@@ -207,6 +240,11 @@ def copy_dir_if_update_non_recursive(srcdir, destdir, filter_ext=None):
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update=1,
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)
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def cp(src, dest):
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print_cmd(['cp', src, dest])
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if not common.dry_run:
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shutil.copy2(src, dest)
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def gem_list_checkpoint_dirs():
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'''
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List checkpoint directory, oldest first.
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@@ -475,38 +513,13 @@ def make_run_dirs():
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os.makedirs(common.p9_dir, exist_ok=True)
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os.makedirs(common.qemu_run_dir, exist_ok=True)
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def cmd_to_string(cmd, cwd=None, extra_env=None, extra_paths=None):
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'''
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Format a command given as a list of strings so that it can
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be viewed nicely and executed by bash directly and print it to stdout.
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'''
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last_newline = ' \\\n'
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newline_separator = last_newline + ' '
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out = []
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if extra_env is None:
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extra_env = {}
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if cwd is not None:
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out.append('cd {} &&'.format(shlex.quote(cwd)))
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if extra_paths is not None:
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out.append('PATH="{}:${{PATH}}"'.format(':'.join(extra_paths)))
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for key in extra_env:
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out.append('{}={}'.format(shlex.quote(key), shlex.quote(extra_env[key])))
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cmd_quote = []
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newline_count = 0
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for arg in cmd:
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if arg == common.Newline:
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cmd_quote.append(arg)
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newline_count += 1
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else:
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cmd_quote.append(shlex.quote(arg))
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if newline_count > 0:
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cmd_quote = [' '.join(list(y)) for x, y in itertools.groupby(cmd_quote, lambda z: z == common.Newline) if not x]
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out.extend(cmd_quote)
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if newline_count == 1 and cmd[-1] == common.Newline:
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ending = ''
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else:
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ending = last_newline + ';'
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return newline_separator.join(out) + ending
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def need_rebuild(srcs, dst):
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if not os.path.exists(dst):
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return True
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for src in srcs:
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if os.path.getmtime(src) > os.path.getmtime(dst):
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return True
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return False
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def print_cmd(cmd, cwd=None, cmd_file=None, extra_env=None, extra_paths=None):
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'''
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@@ -576,11 +589,6 @@ def resolve_args(defaults, args, extra_args):
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argcopy.__dict__ = dict(list(defaults.items()) + list(argcopy.__dict__.items()) + list(extra_args.items()))
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return argcopy
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def cp(src, dest):
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print_cmd(['cp', src, dest])
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if not common.dry_run:
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shutil.copy2(src, dest)
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def rmrf(path):
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print_cmd(['rm', '-r', '-f', path])
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if not common.dry_run and os.path.exists(path):
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