mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-07 23:13:34 +00:00
4778cd4d27
This change fixes an issue with the tcflow() magic numbers that was causing bash to freeze up on Linux. While auditing termios polyfills, several other issues were identified with XNU/BSD compatibility. Out of an abundance of caution this change undefines as much surface area from libc/calls/struct/termios.h as possible, so that autoconf scripts are less likely to detect non-POSIX teletypewriter APIs that haven't been polyfilled by Cosmopolitan. This is a *breaking change* for your static archives in /opt/cosmos if you use the cosmocc toolchain. That's because this change disables the ioctl() undiamonding trick for code outside the monorepo, specifically because it'll lead to brittle ABI breakages like this. If you're using the cosmocc toolchain, you'll need to rebuild libraries like ncurses, readline, etc. Yes diamonds cause bloat. To work around that, consider using tcgetwinsize() instead of ioctl(TIOCGWINSZ) since it'll help you avoid pulling every single ioctl-related polyfill into the linkage. The cosmocc script was specifying -DNDEBUG for some reason. It's fixed.
222 lines
6.6 KiB
Makefile
222 lines
6.6 KiB
Makefile
#-*-mode:makefile-gmake;indent-tabs-mode:t;tab-width:8;coding:utf-8-*-┐
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#───vi: set et ft=make ts=8 tw=8 fenc=utf-8 :vi───────────────────────┘
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#
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# SYNOPSIS
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#
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# System Call Compatibility Layer
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#
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# DESCRIPTION
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#
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# This package exports a familiar system call interface that works
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# across platforms.
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PKGS += LIBC_CALLS
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LIBC_CALLS_ARTIFACTS += LIBC_CALLS_A
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LIBC_CALLS = $(LIBC_CALLS_A_DEPS) $(LIBC_CALLS_A)
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LIBC_CALLS_A = o/$(MODE)/libc/calls/syscalls.a
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LIBC_CALLS_A_FILES := \
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$(wildcard libc/calls/typedef/*) \
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$(wildcard libc/calls/struct/*) \
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$(wildcard libc/calls/*)
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LIBC_CALLS_A_HDRS = $(filter %.h,$(LIBC_CALLS_A_FILES))
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LIBC_CALLS_A_INCS = $(filter %.inc,$(LIBC_CALLS_A_FILES))
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LIBC_CALLS_A_SRCS_S = $(filter %.S,$(LIBC_CALLS_A_FILES))
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LIBC_CALLS_A_SRCS_C = $(filter %.c,$(LIBC_CALLS_A_FILES))
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LIBC_CALLS_A_SRCS = \
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$(LIBC_CALLS_A_SRCS_S) \
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$(LIBC_CALLS_A_SRCS_C)
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LIBC_CALLS_A_OBJS = \
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$(LIBC_CALLS_A_SRCS_S:%.S=o/$(MODE)/%.o) \
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$(LIBC_CALLS_A_SRCS_C:%.c=o/$(MODE)/%.o)
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LIBC_CALLS_A_CHECKS = \
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$(LIBC_CALLS_A).pkg \
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$(LIBC_CALLS_A_HDRS:%=o/$(MODE)/%.ok)
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LIBC_CALLS_A_DIRECTDEPS = \
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LIBC_FMT \
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LIBC_INTRIN \
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LIBC_NEXGEN32E \
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LIBC_NT_ADVAPI32 \
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LIBC_NT_IPHLPAPI \
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LIBC_NT_KERNEL32 \
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LIBC_NT_NTDLL \
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LIBC_NT_PDH \
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LIBC_NT_PSAPI \
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LIBC_NT_POWRPROF \
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LIBC_NT_WS2_32 \
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LIBC_STR \
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LIBC_STUBS \
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LIBC_SYSV_CALLS \
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LIBC_SYSV \
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THIRD_PARTY_COMPILER_RT
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LIBC_CALLS_A_DEPS := \
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$(call uniq,$(foreach x,$(LIBC_CALLS_A_DIRECTDEPS),$($(x))))
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$(LIBC_CALLS_A): \
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libc/calls/ \
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$(LIBC_CALLS_A).pkg \
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$(LIBC_CALLS_A_OBJS)
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$(LIBC_CALLS_A).pkg: \
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$(LIBC_CALLS_A_OBJS) \
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$(foreach x,$(LIBC_CALLS_A_DIRECTDEPS),$($(x)_A).pkg)
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# we can't use asan because:
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# siginfo_t memory is owned by kernels
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o/$(MODE)/libc/calls/siginfo2cosmo.o: private \
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COPTS += \
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-ffreestanding \
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-fno-sanitize=address
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# we can't use asan because:
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# ucontext_t memory is owned by xnu kernel
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o/$(MODE)/libc/calls/sigenter-xnu.o: private \
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COPTS += \
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-ffreestanding \
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-fno-sanitize=address
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# we can't use asan because:
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# vdso memory is owned by linux kernel
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o/$(MODE)/libc/calls/vdsofunc.greg.o: private \
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COPTS += \
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-ffreestanding \
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-fno-sanitize=address
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# we can't use asan because:
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# ntspawn allocates 128kb of heap memory via win32
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o/$(MODE)/libc/calls/ntspawn.o \
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o/$(MODE)/libc/calls/mkntcmdline.o \
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o/$(MODE)/libc/calls/mkntenvblock.o: private \
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COPTS += \
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-ffreestanding \
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-fno-sanitize=address
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# we can't use sanitizers because:
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# windows owns the data structure
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o/$(MODE)/libc/calls/wincrash.o \
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o/$(MODE)/libc/calls/ntcontext2linux.o: private \
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COPTS += \
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-fno-sanitize=all
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# we always want -O3 because:
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# it makes the code size smaller too
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# we need -mstringop-strategy=loop because:
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# privileged code might generate memcpy call
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o/$(MODE)/libc/calls/termios2host.o \
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o/$(MODE)/libc/calls/sigenter-freebsd.o \
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o/$(MODE)/libc/calls/sigenter-netbsd.o \
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o/$(MODE)/libc/calls/sigenter-openbsd.o \
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o/$(MODE)/libc/calls/sigenter-xnu.o \
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o/$(MODE)/libc/calls/ntcontext2linux.o: private \
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COPTS += \
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-O3 \
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-mstringop-strategy=loop
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# we must disable static stack safety because:
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# these functions use alloca(n)
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o/$(MODE)/libc/calls/execl.o \
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o/$(MODE)/libc/calls/execle.o \
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o/$(MODE)/libc/calls/execlp.o \
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o/$(MODE)/libc/calls/statfs.o \
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o/$(MODE)/libc/calls/fstatfs.o \
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o/$(MODE)/libc/calls/execve-sysv.o \
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o/$(MODE)/libc/calls/readlinkat-nt.o \
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o/$(MODE)/libc/calls/execve-nt.greg.o \
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o/$(MODE)/libc/calls/mkntenvblock.o: private \
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CPPFLAGS += \
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-DSTACK_FRAME_UNLIMITED
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# we must segregate codegen because:
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# file contains multiple independently linkable apis
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o/$(MODE)/libc/calls/ioctl-siocgifconf.o \
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o/$(MODE)/libc/calls/ioctl-siocgifconf-nt.o: private \
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COPTS += \
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-ffunction-sections \
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-fdata-sections
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# we always want -Os because:
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# va_arg codegen is very bloated in default mode
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o//libc/calls/open.o \
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o//libc/calls/openat.o \
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o//libc/calls/prctl.o \
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o//libc/calls/ioctl.o \
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o//libc/calls/ioctl_default.o \
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o//libc/calls/ioctl_fioclex-nt.o \
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o//libc/calls/ioctl_fioclex.o \
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o//libc/calls/ioctl_siocgifconf-nt.o \
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o//libc/calls/ioctl_siocgifconf.o \
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o//libc/calls/fcntl.o: private \
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CFLAGS += \
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-Os
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# we always want -Os because:
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# it's early runtime mandatory and quite huge without it
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o//libc/calls/getcwd.greg.o \
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o//libc/calls/getcwd-nt.greg.o \
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o//libc/calls/getcwd-xnu.greg.o \
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o//libc/calls/statfs2cosmo.o: private \
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CFLAGS += \
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-Os
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# we always want -O2 because:
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# division is expensive if not optimized
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o/$(MODE)/libc/calls/clock.o \
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o/$(MODE)/libc/calls/timespec_tomillis.o \
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o/$(MODE)/libc/calls/timespec_tomicros.o \
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o/$(MODE)/libc/calls/timespec_totimeval.o \
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o/$(MODE)/libc/calls/timespec_fromnanos.o \
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o/$(MODE)/libc/calls/timespec_frommillis.o \
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o/$(MODE)/libc/calls/timespec_frommicros.o \
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o/$(MODE)/libc/calls/timeval_tomillis.o \
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o/$(MODE)/libc/calls/timeval_frommillis.o \
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o/$(MODE)/libc/calls/timeval_frommicros.o: private \
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CFLAGS += \
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-O2
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# privileged functions
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o/$(MODE)/libc/calls/sigenter-freebsd.o \
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o/$(MODE)/libc/calls/sigenter-netbsd.o \
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o/$(MODE)/libc/calls/sigenter-openbsd.o \
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o/$(MODE)/libc/calls/sigenter-linux.o \
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o/$(MODE)/libc/calls/sigenter-xnu.o \
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o/$(MODE)/libc/calls/pledge-linux.o \
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o/$(MODE)/libc/calls/siginfo2cosmo.o: private \
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CFLAGS += \
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-ffreestanding \
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-fno-sanitize=all
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o/$(MODE)/libc/calls/pledge-linux.o \
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o/$(MODE)/libc/calls/unveil.o: private \
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CFLAGS += \
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-DSTACK_FRAME_UNLIMITED
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ifeq ($(ARCH), aarch64)
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o/$(MODE)/libc/calls/sigaction.o: private CFLAGS += -mcmodel=large
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o/$(MODE)/libc/calls/getloadavg-nt.o: private CFLAGS += -ffreestanding
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endif
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# we want -Os because:
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# it makes a big difference
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# we need pic because:
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# so it can be an LD_PRELOAD payload
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o/$(MODE)/libc/calls/pledge-linux.o: private \
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CFLAGS += \
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-Os \
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-fPIC
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LIBC_CALLS_LIBS = $(foreach x,$(LIBC_CALLS_ARTIFACTS),$($(x)))
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LIBC_CALLS_SRCS = $(foreach x,$(LIBC_CALLS_ARTIFACTS),$($(x)_SRCS))
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LIBC_CALLS_HDRS = $(foreach x,$(LIBC_CALLS_ARTIFACTS),$($(x)_HDRS))
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LIBC_CALLS_INCS = $(foreach x,$(LIBC_CALLS_ARTIFACTS),$($(x)_INCS))
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LIBC_CALLS_BINS = $(foreach x,$(LIBC_CALLS_ARTIFACTS),$($(x)_BINS))
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LIBC_CALLS_CHECKS = $(foreach x,$(LIBC_CALLS_ARTIFACTS),$($(x)_CHECKS))
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LIBC_CALLS_OBJS = $(foreach x,$(LIBC_CALLS_ARTIFACTS),$($(x)_OBJS))
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LIBC_CALLS_TESTS = $(foreach x,$(LIBC_CALLS_ARTIFACTS),$($(x)_TESTS))
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.PHONY: o/$(MODE)/libc/calls
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o/$(MODE)/libc/calls: $(LIBC_CALLS_CHECKS)
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