57b08b0944
to reflect the new license. These used slightly different spellings that defeated my regular expressions. We understand that people may be surprised that we're moving the header entirely to discuss the new license. We checked this carefully with the Foundation's lawyer and we believe this is the correct approach. Essentially, all code in the project is now made available by the LLVM project under our new license, so you will see that the license headers include that license only. Some of our contributors have contributed code under our old license, and accordingly, we have retained a copy of our old license notice in the top-level files in each project and repository. llvm-svn: 351648
73 lines
2.0 KiB
C
73 lines
2.0 KiB
C
//===-- elf_common.c - Common ELF functionality -------------------*- C -*-===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Common ELF functionality for target plugins.
|
|
// Must be included in the plugin source file AFTER omptarget.h has been
|
|
// included and macro DP(...) has been defined.
|
|
// .
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#if !(defined(_OMPTARGET_H_) && defined(DP))
|
|
#error Include elf_common.c in the plugin source AFTER omptarget.h has been\
|
|
included and macro DP(...) has been defined.
|
|
#endif
|
|
|
|
#include <elf.h>
|
|
#include <libelf.h>
|
|
|
|
// Check whether an image is valid for execution on target_id
|
|
static inline int32_t elf_check_machine(__tgt_device_image *image,
|
|
uint16_t target_id) {
|
|
|
|
// Is the library version incompatible with the header file?
|
|
if (elf_version(EV_CURRENT) == EV_NONE) {
|
|
DP("Incompatible ELF library!\n");
|
|
return 0;
|
|
}
|
|
|
|
char *img_begin = (char *)image->ImageStart;
|
|
char *img_end = (char *)image->ImageEnd;
|
|
size_t img_size = img_end - img_begin;
|
|
|
|
// Obtain elf handler
|
|
Elf *e = elf_memory(img_begin, img_size);
|
|
if (!e) {
|
|
DP("Unable to get ELF handle: %s!\n", elf_errmsg(-1));
|
|
return 0;
|
|
}
|
|
|
|
// Check if ELF is the right kind.
|
|
if (elf_kind(e) != ELF_K_ELF) {
|
|
DP("Unexpected ELF type!\n");
|
|
return 0;
|
|
}
|
|
Elf64_Ehdr *eh64 = elf64_getehdr(e);
|
|
Elf32_Ehdr *eh32 = elf32_getehdr(e);
|
|
|
|
if (!eh64 && !eh32) {
|
|
DP("Unable to get machine ID from ELF file!\n");
|
|
elf_end(e);
|
|
return 0;
|
|
}
|
|
|
|
uint16_t MachineID;
|
|
if (eh64 && !eh32)
|
|
MachineID = eh64->e_machine;
|
|
else if (eh32 && !eh64)
|
|
MachineID = eh32->e_machine;
|
|
else {
|
|
DP("Ambiguous ELF header!\n");
|
|
elf_end(e);
|
|
return 0;
|
|
}
|
|
|
|
elf_end(e);
|
|
return MachineID == target_id;
|
|
}
|