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Get --ftrace working on aarch64

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This change implements a new approach to function call logging, that's
based on the GCC flag: -fpatchable-function-entry. Read the commentary
in build/config.mk to learn how it works.
This commit is contained in:
Justine Tunney 2023-06-05 23:35:31 -07:00
parent 5b908bc756
commit eb40cb371d
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GPG key ID: BE714B4575D6E328
934 changed files with 2259 additions and 1268 deletions
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32
libc/intrin/intrin.mk
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@ -16,6 +16,7 @@ LIBC_INTRIN_A_CHECKS = $(LIBC_INTRIN_A).pkg
ifeq ($(ARCH), aarch64)
LIBC_INTRIN_A_SRCS_S += $(wildcard libc/intrin/aarch64/*.S)
LIBC_INTRIN_A_HDRS += libc/intrin/aarch64/asmdefs.internal.h
endif
LIBC_INTRIN_A_OBJS = \
@ -49,39 +50,39 @@ $(LIBC_INTRIN_A).pkg: \
# we can't use asan because:
# __strace_init() calls this before asan is initialized
o/$(MODE)/libc/intrin/strace_enabled.o: private \
OVERRIDE_COPTS += \
COPTS += \
-fno-sanitize=address
# we can't use asan because:
# asan guard pages haven't been allocated yet
o/$(MODE)/libc/intrin/directmap.o \
o/$(MODE)/libc/intrin/directmap-nt.o: private \
OVERRIDE_COPTS += \
COPTS += \
-ffreestanding \
-fno-sanitize=address
# we want small code size because:
# to keep .text.head under 4096 bytes
o/$(MODE)/libc/intrin/mman.greg.o: private \
OVERRIDE_COPTS += \
COPTS += \
-Os
# we can't use asan and ubsan because:
# this is asan and ubsan
o/$(MODE)/libc/intrin/asan.o \
o/$(MODE)/libc/intrin/ubsan.o: private \
OVERRIDE_CFLAGS += \
CFLAGS += \
-fno-sanitize=all \
-fno-stack-protector
o/$(MODE)/libc/intrin/asan.o: private \
OVERRIDE_CFLAGS += \
CFLAGS += \
-O2 \
-finline \
-finline-functions
o/$(MODE)/libc/intrin/asanthunk.o: private \
OVERRIDE_CFLAGS += \
CFLAGS += \
-x-no-pg \
$(MNO_FENTRY) \
-ffreestanding \
@ -95,7 +96,7 @@ o/$(MODE)/libc/intrin/strerrno.greg.o \
o/$(MODE)/libc/intrin/strerrdoc.greg.o \
o/$(MODE)/libc/intrin/strerror_wr.greg.o \
o/$(MODE)/libc/intrin/kprintf.greg.o: private \
OVERRIDE_CFLAGS += \
CFLAGS += \
-fpie \
-fwrapv \
-x-no-pg \
@ -109,10 +110,9 @@ o/$(MODE)/libc/intrin/kprintf.greg.o: private \
o/$(MODE)/libc/intrin/futex_wait.o \
o/$(MODE)/libc/intrin/futex_wake.o \
o/$(MODE)/libc/intrin/gettid.greg.o \
o/$(MODE)/libc/intrin/sys_gettid.greg.o \
o/$(MODE)/libc/intrin/_trylock_debug_4.o \
o/$(MODE)/libc/intrin/_spinlock_debug_4.o: private \
OVERRIDE_CFLAGS += \
CFLAGS += \
-fwrapv \
-x-no-pg \
$(MNO_FENTRY) \
@ -125,13 +125,13 @@ o/$(MODE)/libc/intrin/_spinlock_debug_4.o: private \
# global gone could be raised
o/$(MODE)/libc/intrin/exit.o \
o/$(MODE)/libc/intrin/restorewintty.o: private \
OVERRIDE_CFLAGS += \
CFLAGS += \
-fno-sanitize=all
# we can't use -ftrapv because:
# this file implements it
o/$(MODE)/libc/intrin/ftrapv.o: private \
OVERRIDE_CFLAGS += \
CFLAGS += \
-ffunction-sections \
-ffreestanding \
-fwrapv
@ -142,7 +142,7 @@ o/$(MODE)/libc/intrin/describeflags.o \
o/$(MODE)/libc/intrin/describeframe.o \
o/$(MODE)/libc/intrin/describemapflags.o \
o/$(MODE)/libc/intrin/describeprotflags.o: private \
OVERRIDE_CFLAGS += \
CFLAGS += \
-fno-sanitize=address
o/$(MODE)/libc/intrin/exit1.greg.o \
@ -180,7 +180,7 @@ o/$(MODE)/libc/intrin/createfilemappingnuma.o \
o/$(MODE)/libc/intrin/waitformultipleobjects.o \
o/$(MODE)/libc/intrin/generateconsolectrlevent.o \
o/$(MODE)/libc/intrin/wsawaitformultipleevents.o: private\
OVERRIDE_CFLAGS += \
CFLAGS += \
-Os \
-fwrapv \
-ffreestanding \
@ -188,20 +188,20 @@ o/$(MODE)/libc/intrin/wsawaitformultipleevents.o: private\
-fno-sanitize=all
o//libc/intrin/memmove.o: private \
OVERRIDE_CFLAGS += \
CFLAGS += \
-fno-toplevel-reorder
o//libc/intrin/bzero.o \
o//libc/intrin/memcmp.o \
o//libc/intrin/memset.o \
o//libc/intrin/memmove.o: private \
OVERRIDE_CFLAGS += \
CFLAGS += \
-O2 -finline
o/$(MODE)/libc/intrin/bzero.o \
o/$(MODE)/libc/intrin/memcmp.o \
o/$(MODE)/libc/intrin/memmove.o: private \
OVERRIDE_CFLAGS += \
CFLAGS += \
-fpie
# these assembly files are safe to build on aarch64