mirrors/cosmopolitan
1
0
Fork 0
mirror of https://github.com/jart/cosmopolitan.git synced 2025-07-15 07:19:18 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Rewrite brk() and sbrk()

Browse source 
This change reduces the .bss memory requirement for all executables by
O(64kb). The brk system calls are now fully tested and figured out and
might be useful for tiny programs that only target System Five.
This commit is contained in:
Justine Tunney 2022-10-01 23:11:56 -07:00
parent bc8532688b
commit 5005f2e446
No known key found for this signature in database
GPG key ID: BE714B4575D6E328
23 changed files with 643 additions and 294 deletions
Download patch file Download diff file Expand all files Collapse all files

38
build/definitions.mk
View file

@ -73,33 +73,25 @@ IMAGE_BASE_VIRTUAL ?= 0x400000
IGNORE := $(shell $(ECHO) -2 ♥cosmo)
IGNORE := $(shell $(MKDIR) o/tmp)
ifneq ("$(wildcard o/third_party/gcc/bin/x86_64-pc-linux-gnu-as.exe)","")
AS = o/third_party/gcc/bin/x86_64-pc-linux-gnu-as.exe
CC = o/third_party/gcc/bin/x86_64-pc-linux-gnu-gcc.exe
CXX = o/third_party/gcc/bin/x86_64-pc-linux-gnu-g++.exe
CXXFILT = o/third_party/gcc/bin/x86_64-pc-linux-gnu-c++filt.exe
LD = o/third_party/gcc/bin/x86_64-pc-linux-gnu-ld.bfd.exe
NM = o/third_party/gcc/bin/x86_64-pc-linux-gnu-nm.exe
GCC = o/third_party/gcc/bin/x86_64-pc-linux-gnu-gcc.exe
STRIP = o/third_party/gcc/bin/x86_64-pc-linux-gnu-strip.exe
OBJCOPY = o/third_party/gcc/bin/x86_64-pc-linux-gnu-objcopy.exe
OBJDUMP = o/third_party/gcc/bin/x86_64-pc-linux-gnu-objdump.exe
ADDR2LINE = $(PWD)/o/third_party/gcc/bin/x86_64-pc-linux-gnu-addr2line.exe
ifneq ("$(wildcard o/third_party/gcc/bin/x86_64-pc-linux-gnu-*)","")
PREFIX = o/third_party/gcc/bin/x86_64-pc-linux-gnu-
else
IGNORE := $(shell build/bootstrap/unbundle.com)
AS = o/third_party/gcc/bin/x86_64-linux-musl-as
CC = o/third_party/gcc/bin/x86_64-linux-musl-gcc
CXX = o/third_party/gcc/bin/x86_64-linux-musl-g++
CXXFILT = o/third_party/gcc/bin/x86_64-linux-musl-c++filt
LD = o/third_party/gcc/bin/x86_64-linux-musl-ld.bfd
NM = o/third_party/gcc/bin/x86_64-linux-musl-nm
GCC = o/third_party/gcc/bin/x86_64-linux-musl-gcc
STRIP = o/third_party/gcc/bin/x86_64-linux-musl-strip
OBJCOPY = o/third_party/gcc/bin/x86_64-linux-musl-objcopy
OBJDUMP = o/third_party/gcc/bin/x86_64-linux-musl-objdump
ADDR2LINE = $(PWD)/o/third_party/gcc/bin/x86_64-linux-musl-addr2line
PREFIX = o/third_party/gcc/bin/x86_64-linux-musl-
endif
AS = $(PREFIX)as
CC = $(PREFIX)gcc
CXX = $(PREFIX)g++
CXXFILT = $(PREFIX)c++filt
LD = $(PREFIX)ld.bfd
NM = $(PREFIX)nm
GCC = $(PREFIX)gcc
STRIP = $(PREFIX)strip
OBJCOPY = $(PREFIX)objcopy
OBJDUMP = $(PREFIX)objdump
ADDR2LINE = $(PWD)/$(PREFIX)addr2line
export ADDR2LINE
export LC_ALL
export MKDIR