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Diffstat (limited to 'serverboot/mach-exec.h')
| -rw-r--r-- | serverboot/mach-exec.h | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/serverboot/mach-exec.h b/serverboot/mach-exec.h new file mode 100644 index 00000000..94b234b0 --- /dev/null +++ b/serverboot/mach-exec.h @@ -0,0 +1,130 @@ +/* + * Mach Operating System + * Copyright (c) 1991,1990,1989,1988 Carnegie Mellon University + * All Rights Reserved. + * + * Permission to use, copy, modify and distribute this software and its + * documentation is hereby granted, provided that both the copyright + * notice and this permission notice appear in all copies of the + * software, derivative works or modified versions, and any portions + * thereof, and that both notices appear in supporting documentation. + * + * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS + * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR + * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. + * + * Carnegie Mellon requests users of this software to return to + * + * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU + * School of Computer Science + * Carnegie Mellon University + * Pittsburgh PA 15213-3890 + * + * any improvements or extensions that they make and grant Carnegie the + * rights to redistribute these changes. + */ + +#ifndef _MACH_EXEC_H_ +#define _MACH_EXEC_H_ + +#include <mach/machine/vm_types.h> +#include <mach/vm_prot.h> + +/* XXX */ +typedef enum +{ + EXEC_ELF = 1, + EXEC_AOUT = 2, +} exec_format_t; + +typedef struct exec_info +{ + /* Format of executable loaded - see above. */ + exec_format_t format; + + /* Program entrypoint. */ + vm_offset_t entry; + + /* Initial data pointer - only some architectures use this. */ + vm_offset_t init_dp; + + /* (ELF) Address of interpreter string for loading shared libraries, null if none. */ + vm_offset_t interp; + +} exec_info_t; + +typedef int exec_sectype_t; +#define EXEC_SECTYPE_READ VM_PROT_READ +#define EXEC_SECTYPE_WRITE VM_PROT_WRITE +#define EXEC_SECTYPE_EXECUTE VM_PROT_EXECUTE +#define EXEC_SECTYPE_PROT_MASK VM_PROT_ALL +#define EXEC_SECTYPE_ALLOC ((exec_sectype_t)0x000100) +#define EXEC_SECTYPE_LOAD ((exec_sectype_t)0x000200) +#define EXEC_SECTYPE_DEBUG ((exec_sectype_t)0x010000) +#define EXEC_SECTYPE_AOUT_SYMTAB ((exec_sectype_t)0x020000) +#define EXEC_SECTYPE_AOUT_STRTAB ((exec_sectype_t)0x040000) + +typedef int exec_read_func_t(void *handle, vm_offset_t file_ofs, + void *buf, vm_size_t size, + vm_size_t *out_actual); + +typedef int exec_read_exec_func_t(void *handle, + vm_offset_t file_ofs, vm_size_t file_size, + vm_offset_t mem_addr, vm_size_t mem_size, + exec_sectype_t section_type); + +/* + * Routines exported from libmach_exec.a + */ + +/* Generic function to interpret an executable "file" + and "load" it into "memory". + Doesn't really know about files, loading, or memory; + all file I/O and destination memory accesses + go through provided functions. + Thus, this is a very generic loading mechanism. + + The read() function is used to read metadata from the file + into the local address space. + + The read_exec() function is used to load the actual sections. + It is used for all kinds of sections - code, data, bss, debugging data. + The 'section_type' parameter specifies what type of section is being loaded. + + For code, data, and bss, the EXEC_SECTYPE_ALLOC flag will be set. + For code and data (i.e. stuff that's actually loaded from the file), + EXEC_SECTYPE_LOAD will also be set. + The EXEC_SECTYPE_PROT_MASK contains the intended access permissions + for the section. + 'file_size' may be less than 'mem_size'; + the remaining data must be zero-filled. + 'mem_size' is always greater than zero, but 'file_size' may be zero + (e.g. in the case of a bss section). + No two read_exec() calls for one executable + will load data into the same virtual memory page, + although they may load from arbitrary (possibly overlapping) file positions. + + For sections that aren't normally loaded into the process image + (e.g. debug sections), EXEC_SECTYPE_ALLOC isn't set, + but some other appropriate flag is set to indicate the type of section. + + The 'handle' is an opaque pointer which is simply passed on + to the read() and read_exec() functions. + + On return, the specified info structure is filled in + with information about the loaded executable. +*/ +int exec_load(exec_read_func_t *read, exec_read_exec_func_t *read_exec, + void *handle, exec_info_t *out_info); + +/* + * Error codes + */ + +#define EX_NOT_EXECUTABLE 6000 /* not a recognized executable format */ +#define EX_WRONG_ARCH 6001 /* valid executable, but wrong arch. */ +#define EX_CORRUPT 6002 /* recognized executable, but mangled */ +#define EX_BAD_LAYOUT 6003 /* something wrong with the memory or file image layout */ + + +#endif /* _MACH_EXEC_H_ */ |