+add_gen_header(
+ linux_syscall_h
+ DEF_FILE syscall.h.def
+ GEN_HDR syscall.h
+ PARAMS
+ inline_syscalls=${LIBC_TARGET_MACHINE}/syscall.h.inc
+ DATA_FILES
+ ${LIBC_TARGET_MACHINE}/syscall.h.inc
+)
+
add_subdirectory(x86_64)
#define ENTRYPOINT_SECTION_ATTRIBUTE(name) \
__attribute__((section(".llvm.libc.entrypoint."#name)))
#define LLVM_LIBC_ENTRYPOINT(name) ENTRYPOINT_SECTION_ATTRIBUTE(name) name
-
-// TODO: Get rid of the PAGE_SIZE macro. It is present only as an interim
-// measure until we can move the implementations of mmap and munmap to under
-// the config/linux directory. After that, the implementations can use
-// EXEC_PAGESIZE until page size can be read from the aux vector.
-#define PAGE_SIZE 4096
GEN_HDR sys/mman.h
DEPENDS
libc_posix_types_h
+ llvm_libc_common_h
)
add_gen_header(
add_subdirectory(string)
# TODO: Add this target conditional to the target OS.
add_subdirectory(sys)
-add_subdirectory(unistd)
add_subdirectory(__support)
-#TODO: The sources and target listed here should ideally live in config/linux.
-
-add_entrypoint_object(
- mmap
- SRCS
- mmap.cpp
- HDRS
- mmap.h
- DEPENDS
- sys_mman_h
- sys_syscall_h
- syscall_impl_h
- __errno_location
-)
-
-add_entrypoint_object(
- munmap
- SRCS
- munmap.cpp
- HDRS
- munmap.h
- DEPENDS
- sys_mman_h
- sys_syscall_h
- syscall_impl_h
- __errno_location
-)
+if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/${LIBC_TARGET_OS})
+ add_subdirectory(${LIBC_TARGET_OS})
+endif()
--- /dev/null
+add_entrypoint_object(
+ mmap
+ SRCS
+ mmap.cpp
+ HDRS
+ ../mmap.h
+ DEPENDS
+ sys_mman_h
+ sys_syscall_h
+ linux_syscall_h
+ __errno_location
+)
+
+add_entrypoint_object(
+ munmap
+ SRCS
+ munmap.cpp
+ HDRS
+ ../munmap.h
+ DEPENDS
+ sys_mman_h
+ sys_syscall_h
+ linux_syscall_h
+ __errno_location
+)
-//===-------------- Implementation of the POSIX mmap function -------------===//
+//===---------- Linux implementation of the POSIX mmap function -----------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
//===----------------------------------------------------------------------===//
#include "src/sys/mman/mmap.h"
-#include "include/sys/syscall.h" // For syscall numbers.
+
+#include "config/linux/syscall.h" // For internal syscall function.
+#include "include/sys/syscall.h" // For syscall numbers.
#include "src/__support/common.h"
#include "src/errno/llvmlibc_errno.h"
-#include "src/unistd/syscall.h" // For internal syscall function.
+
+#include <linux/param.h> // For EXEC_PAGESIZE.
namespace __llvm_libc {
// done in this function as modern linux versions do it in the syscall.
// TODO: Perform argument validation not done by the linux syscall.
+ // EXEC_PAGESIZE is used for the page size. While this is OK for x86_64, it
+ // might not be correct in general.
+ // TODO: Use pagesize read from the ELF aux vector instead of EXEC_PAGESIZE.
+
#ifdef SYS_mmap2
- offset /= PAGE_SIZE;
+ offset /= EXEC_PAGESIZE;
long syscall_number = SYS_mmap2;
#elif SYS_mmap
long syscall_number = SYS_mmap;
// However, since a valid return address cannot be within the last page, a
// return value corresponding to a location in the last page is an error
// value.
- if (ret_val < 0 && ret_val > -PAGE_SIZE) {
+ if (ret_val < 0 && ret_val > -EXEC_PAGESIZE) {
llvmlibc_errno = -ret_val;
return MAP_FAILED;
}
-//===------------- Implementation of the POSIX munmap function ------------===//
+//===---------- Linux implementation of the POSIX munmap function ---------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
//===----------------------------------------------------------------------===//
#include "src/sys/mman/munmap.h"
-#include "include/sys/syscall.h" // For syscall numbers.
+
+#include "config/linux/syscall.h" // For internal syscall function.
+#include "include/sys/syscall.h" // For syscall numbers.
#include "src/__support/common.h"
#include "src/errno/llvmlibc_errno.h"
-#include "src/unistd/syscall.h" // For internal syscall function.
namespace __llvm_libc {
+++ /dev/null
-add_gen_header(
- syscall_impl_h
- DEF_FILE syscall.h.def
- GEN_HDR syscall.h
- PARAMS
- inline_syscalls=../../config/${LIBC_TARGET_OS}/${LIBC_TARGET_MACHINE}/syscall.h.inc
- DATA_FILES
- ../../config/${LIBC_TARGET_OS}/${LIBC_TARGET_MACHINE}/syscall.h.inc
-)
SUITE libc_linux_tests
SRCS syscall_test.cpp
DEPENDS
- syscall_impl_h
+ linux_syscall_h
support_common_h
)
//
//===----------------------------------------------------------------------===//
-#include "src/unistd/syscall.h"
+#include "config/linux/syscall.h"
#include "utils/UnitTest/Test.h"
#include <functional>
-add_libc_testsuite(libc_sys_mman_unittests)
-
-add_libc_unittest(
- mmap_test
- SUITE
- libc_sys_mman_unittests
- SRCS
- mmap_test.cpp
- DEPENDS
- errno_h
- sys_mman_h
- mmap
- munmap
- __errno_location
-)
+if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/${LIBC_TARGET_OS})
+ add_subdirectory(${LIBC_TARGET_OS})
+endif()
--- /dev/null
+add_libc_testsuite(libc_sys_mman_unittests)
+
+add_libc_unittest(
+ mmap_test
+ SUITE
+ libc_sys_mman_unittests
+ SRCS
+ mmap_test.cpp
+ DEPENDS
+ errno_h
+ sys_mman_h
+ mmap
+ munmap
+ __errno_location
+)