minix/lib/libexec/libexec.h

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#ifndef _LIBEXEC_H_
#define _LIBEXEC_H_ 1
#include <sys/exec_elf.h>
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struct exec_info;
typedef int (*libexec_loadfunc_t)(struct exec_info *execi,
off_t offset, off_t vaddr, size_t len);
typedef int (*libexec_clearfunc_t)(struct exec_info *execi,
off_t vaddr, size_t len);
typedef int (*libexec_allocfunc_t)(struct exec_info *execi,
off_t vaddr, size_t len);
typedef int (*libexec_procclearfunc_t)(struct exec_info *execi);
struct exec_info {
/* Filled in by libexec caller */
endpoint_t proc_e; /* Process endpoint */
char *hdr; /* Header or full image */
size_t hdr_len; /* Size of hdr */
vir_bytes frame_len; /* Stack size */
char progname[PROC_NAME_LEN]; /* Program name */
uid_t new_uid; /* Process UID after exec */
gid_t new_gid; /* Process GID after exec */
int allow_setuid; /* Allow set{u,g}id execution? */
vir_bytes stack_size; /* Desired stack size */
/* Callback pointers for use by libexec */
libexec_loadfunc_t copymem; /* Copy callback */
libexec_clearfunc_t clearmem; /* Clear callback */
libexec_allocfunc_t allocmem_prealloc; /* Alloc callback */
libexec_allocfunc_t allocmem_ondemand; /* Alloc callback */
libexec_procclearfunc_t clearproc; /* Clear process callback */
void *opaque; /* Callback data */
/* Filled in by libexec load function */
vir_bytes load_base; /* Where executable is loaded */
vir_bytes pc; /* Entry point of exec file */
vir_bytes stack_high; /* High stack addr */
};
int elf_has_interpreter(char *exec_hdr, int hdr_len, char *interp, int maxsz);
int elf_phdr(char *exec_hdr, int hdr_len, vir_bytes *phdr);
int read_header_elf(char *exec_hdr, int hdr_len,
vir_bytes *text_vaddr, phys_bytes *text_paddr,
vir_bytes *text_filebytes, vir_bytes *text_membytes,
vir_bytes *data_vaddr, phys_bytes *data_paddr,
vir_bytes *data_filebytes, vir_bytes *data_membytes,
vir_bytes *pc, off_t *text_offset, off_t *data_offset);
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void libexec_patch_ptr(char stack[ARG_MAX], vir_bytes base);
int libexec_pm_newexec(endpoint_t proc_e, struct exec_info *execi);
typedef int (*libexec_exec_loadfunc_t)(struct exec_info *execi);
int libexec_load_elf(struct exec_info *execi);
int libexec_alloc_mmap_prealloc(struct exec_info *execi, off_t vaddr, size_t len);
int libexec_alloc_mmap_ondemand(struct exec_info *execi, off_t vaddr, size_t len);
int libexec_clearproc_vm_procctl(struct exec_info *execi);
int libexec_clear_sys_memset(struct exec_info *execi, off_t vaddr, size_t len);
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#endif /* !_LIBEXEC_H_ */