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/*
* Copyright (c) 1995, 1994, 1993, 1992, 1991, 1990
* Open Software Foundation, Inc.
*
* Permission to use, copy, modify, and distribute this software and
* its documentation for any purpose and without fee is hereby granted,
* provided that the above copyright notice appears in all copies and
* that both the copyright notice and this permission notice appear in
* supporting documentation, and that the name of ("OSF") or Open Software
* Foundation not be used in advertising or publicity pertaining to
* distribution of the software without specific, written prior permission.
*
* OSF DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL OSF BE LIABLE FOR ANY
* SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
* ACTION OF CONTRACT, NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING
* OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE
*/
/*
* OSF Research Institute MK6.1 (unencumbered) 1/31/1995
*/
#include <alloca.h>
#include <mach/machine/vm_types.h>
#include <elf.h>
#include "mach-exec.h"
int exec_load(exec_read_func_t *read, exec_read_exec_func_t *read_exec,
void *handle, exec_info_t *out_info)
{
vm_size_t actual;
union { Elf32_Ehdr h; Elf64_Ehdr h64; } x;
int i;
int result;
/* Read the ELF header. */
if ((result = (*read)(handle, 0, &x, sizeof(x), &actual)) != 0)
return result;
if (actual < sizeof(x))
return EX_NOT_EXECUTABLE;
if ((x.h.e_ident[EI_MAG0] != ELFMAG0) ||
(x.h.e_ident[EI_MAG1] != ELFMAG1) ||
(x.h.e_ident[EI_MAG2] != ELFMAG2) ||
(x.h.e_ident[EI_MAG3] != ELFMAG3))
return EX_NOT_EXECUTABLE;
/* Make sure the file is of the right architecture. */
#ifdef i386
# define MY_CLASS ELFCLASS32
# define MY_DATA ELFDATA2LSB
# define MY_MACHINE EM_386
#elif defined __alpha__
# define MY_CLASS ELFCLASS64
# define MY_DATA ELFDATA2LSB
# define MY_MACHINE EM_ALPHA
#else
#error Not ported to this architecture!
#endif
if ((x.h.e_ident[EI_CLASS] != MY_CLASS) ||
(x.h.e_ident[EI_DATA] != MY_DATA) ||
(x.h.e_machine != MY_MACHINE))
return EX_WRONG_ARCH;
if (MY_CLASS == ELFCLASS64)
{
Elf64_Phdr *phdr, *ph;
vm_size_t phsize;
/* XXX others */
out_info->entry = (vm_offset_t) x.h64.e_entry;
out_info->init_dp = 0; /* ? */
phsize = x.h64.e_phnum * x.h64.e_phentsize;
phdr = (Elf64_Phdr *)alloca(phsize);
result = (*read)(handle, x.h64.e_phoff, phdr, phsize, &actual);
if (result)
return result;
if (actual < phsize)
return EX_CORRUPT;
for (i = 0; i < x.h64.e_phnum; i++)
{
ph = (Elf64_Phdr *)((vm_offset_t)phdr + i * x.h64.e_phentsize);
if (ph->p_type == PT_LOAD)
{
exec_sectype_t type = EXEC_SECTYPE_ALLOC |
EXEC_SECTYPE_LOAD;
if (ph->p_flags & PF_R) type |= EXEC_SECTYPE_READ;
if (ph->p_flags & PF_W) type |= EXEC_SECTYPE_WRITE;
if (ph->p_flags & PF_X) type |= EXEC_SECTYPE_EXECUTE;
result = (*read_exec)(handle,
ph->p_offset, ph->p_filesz,
ph->p_vaddr, ph->p_memsz, type);
}
}
}
else
{
Elf32_Phdr *phdr, *ph;
vm_size_t phsize;
/* XXX others */
out_info->entry = (vm_offset_t) x.h.e_entry;
out_info->init_dp = 0; /* ? */
phsize = x.h.e_phnum * x.h.e_phentsize;
phdr = (Elf32_Phdr *)alloca(phsize);
result = (*read)(handle, x.h.e_phoff, phdr, phsize, &actual);
if (result)
return result;
if (actual < phsize)
return EX_CORRUPT;
for (i = 0; i < x.h.e_phnum; i++)
{
ph = (Elf32_Phdr *)((vm_offset_t)phdr + i * x.h.e_phentsize);
if (ph->p_type == PT_LOAD)
{
exec_sectype_t type = EXEC_SECTYPE_ALLOC |
EXEC_SECTYPE_LOAD;
if (ph->p_flags & PF_R) type |= EXEC_SECTYPE_READ;
if (ph->p_flags & PF_W) type |= EXEC_SECTYPE_WRITE;
if (ph->p_flags & PF_X) type |= EXEC_SECTYPE_EXECUTE;
result = (*read_exec)(handle,
ph->p_offset, ph->p_filesz,
ph->p_vaddr, ph->p_memsz, type);
}
}
}
return 0;
}
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