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Userland: Set linker max page size to 4096

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Neither the kernel nor LibELF support loading libraries with larger
PT_LOAD alignment. The default on x86 is 4096 while it's 2MiB on x86_64.
This changes the alignment to 4096 on all platforms.
This commit is contained in:
Gunnar Beutner 2021-06-28 17:19:18 +02:00 committed by Andreas Kling
parent e979a88af4
commit e35b060501
Notes: sideshowbarker 2024-07-18 11:22:43 +09:00 
Author: https://github.com/gunnarbeutner
Commit: https://github.com/SerenityOS/serenity/commit/e35b0605013
Pull-request: https://github.com/SerenityOS/serenity/pull/8301
2 changed files with 2 additions and 2 deletions
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2
CMakeLists.txt
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@ -182,7 +182,7 @@ endforeach()
set(CMAKE_INSTALL_NAME_TOOL "")
set(CMAKE_SHARED_LIBRARY_SUFFIX ".so")
set(CMAKE_SHARED_LIBRARY_CREATE_CXX_FLAGS "-shared -Wl,--hash-style=gnu,-z,relro,-z,now,-z,noexecstack")
set(CMAKE_CXX_LINK_FLAGS "-Wl,--hash-style=gnu,-z,relro,-z,now,-z,noexecstack")
set(CMAKE_CXX_LINK_FLAGS "-Wl,--hash-style=gnu,-z,relro,-z,now,-z,noexecstack,-z,max-page-size=0x1000")
# We disable it completely because it makes cmake very spammy.
# This will need to be revisited when the Loader supports RPATH/RUN_PATH.

2
Kernel/CMakeLists.txt
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@ -356,7 +356,7 @@ if (NOT ${CMAKE_HOST_SYSTEM_NAME} MATCHES SerenityOS)
endif()
if ("${SERENITY_ARCH}" STREQUAL "x86_64")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mcmodel=large -fno-pic -mno-red-zone -z max-page-size=0x1000")
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mcmodel=large -fno-pic -mno-red-zone")
else()
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pie -fPIE")
endif()