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#include "sysdep.h"
#include "pe-mdso.h"
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <sys/stat.h>
#include <perk/perk.h>
#include <mdso/mdso.h>
extern char * program_name;
extern int xatexit(void (*)(void));
static char pe_mdso_tmp_lib_name[] = "/tmp/mdso_XXXXXXXXXXXX";
static char pe_perk_tmp_def_name[] = "/tmp/perk_XXXXXXXXXXXX";
static struct pe_driver_ctx * pe_dctx;
struct pe_mdso_lib {
dev_t st_dev;
ino_t st_ino;
char ar_name[24];
};
struct pe_mdso_lib * pe_mdso_lib_arr;
struct pe_mdso_lib * pe_mdso_lib_ptr;
struct pe_mdso_lib * pe_mdso_lib_cap;
static int pe_mdso_perk_init(void)
{
char * argv[2];
if (pe_dctx)
return 0;
argv[0] = program_name;
argv[1] = 0;
return pe_get_driver_ctx(argv,0,0,0,&pe_dctx);
}
static void pe_mdso_cache_unlink(void)
{
struct pe_mdso_lib * pe_mdso;
for (pe_mdso=pe_mdso_lib_arr; pe_mdso<pe_mdso_lib_ptr; pe_mdso++)
unlink(pe_mdso->ar_name);
}
static int pe_mdso_cache_alloc(void)
{
void * prev;
size_t size;
size_t nlib;
if (pe_mdso_lib_cap > pe_mdso_lib_ptr)
return 0;
prev = pe_mdso_lib_arr;
nlib = pe_mdso_lib_cap - pe_mdso_lib_arr;
size = nlib * sizeof(struct pe_mdso_lib);
if (!(pe_mdso_lib_arr = calloc(nlib+2,sizeof(struct pe_mdso_lib))))
return -1;
if (!prev)
xatexit(pe_mdso_cache_unlink);
memcpy(pe_mdso_lib_arr,prev,size);
pe_mdso_lib_ptr = &pe_mdso_lib_arr[nlib];
pe_mdso_lib_cap = &pe_mdso_lib_arr[nlib+2];
return 0;
}
const char * pe_mdso_input_name(const char * input_name)
{
int fdin;
int fdout;
char * libname;
char * argv[8];
struct stat st;
struct pe_mdso_lib * pe_mdso;
struct pe_unit_ctx * pe_uctx;
struct pe_fd_ctx pe_fdctx;
struct mdso_driver_ctx * mdso_dctx;
/* perk driver context */
if (pe_mdso_perk_init() < 0)
return 0;
/* defer when input_name cannot be opened */
if ((fdin = open(input_name,O_RDONLY)) < 0)
return input_name;
/* stat */
if (fstat(fdin,&st) < 0) {
close(fdin);
pe_free_unit_ctx(pe_uctx);
pe_output_error_vector(pe_dctx);
return 0;
}
/* repeated input argument? */
for (pe_mdso=pe_mdso_lib_arr; pe_mdso<pe_mdso_lib_ptr; pe_mdso++) {
if ((pe_mdso->st_dev == st.st_dev) && (pe_mdso->st_ino == st.st_ino)) {
close(fdin);
return pe_mdso->ar_name;
}
}
/* defer when perk object/image context cannot be created */
if (pe_get_unit_ctx(pe_dctx,input_name,&pe_uctx) < 0) {
close(fdin);
return input_name;
}
/* defer when input file is not an image */
switch (pe_uctx->meta->m_subtype) {
case PE_SUBTYPE_DLL:
case PE_SUBTYPE_EXE:
break;
default:
close(fdin);
pe_free_unit_ctx(pe_uctx);
return input_name;
}
/* image bits */
switch (pe_uctx->meta->m_abi) {
case PE_ABI_PE32:
argv[1] = "-m32";
break;
case PE_ABI_PE64:
argv[1] = "-m64";
break;
default:
close(fdin);
pe_free_unit_ctx(pe_uctx);
return 0;
}
/* perk driver fd context (get) */
if ((pe_get_driver_fdctx(pe_dctx,&pe_fdctx)) < 0) {
close(fdin);
pe_free_unit_ctx(pe_uctx);
pe_output_error_vector(pe_dctx);
return 0;
}
/* template init */
memset (&pe_perk_tmp_def_name[10],'X',12);
memset (&pe_mdso_tmp_lib_name[10],'X',12);
/* perk .def file (create) */
if ((pe_fdctx.fdout = mkstemp(pe_perk_tmp_def_name)) < 0) {
close(fdin);
pe_free_unit_ctx(pe_uctx);
pe_output_error_vector(pe_dctx);
return 0;
}
/* perk driver fd context (set) */
if ((pe_set_driver_fdctx(pe_dctx,&pe_fdctx)) < 0) {
close(fdin);
pe_free_unit_ctx(pe_uctx);
pe_output_error_vector(pe_dctx);
return 0;
}
/* perk .def file (populate) */
if (pe_output_export_symbols(pe_dctx,pe_uctx->meta) < 0) {
close(fdin);
pe_free_unit_ctx(pe_uctx);
pe_output_error_vector(pe_dctx);
return 0;
};
/* done with perk */
close(fdin);
pe_free_unit_ctx(pe_uctx);
/* libname */
if ((libname = strrchr(input_name,'/')))
libname++;
else if ((libname = strrchr(input_name,'\\')))
libname++;
else
libname = (char *)input_name;
/* cache alloc (as needed) */
if (pe_mdso_cache_alloc() < 0)
return 0;
/* mdso lib file (create) */
if ((fdout = mkstemp(pe_mdso_tmp_lib_name)) < 0)
return 0;
/* mdso driver context (argv[1] already set, see above) */
argv[0] = program_name;
argv[2] = "--libname";
argv[3] = libname;
argv[4] = "--implib";
argv[5] = pe_mdso_tmp_lib_name;
argv[6] = pe_perk_tmp_def_name;
argv[7] = 0;
if (mdso_get_driver_ctx(argv,0,0,0,&mdso_dctx) < 0) {
close(fdout);
return 0;
}
/* mdso lib file (generate) */
if (mdso_create_implib_archive(mdso_dctx) < 0) {
close(fdout);
mdso_output_error_vector(mdso_dctx);
mdso_free_driver_ctx(mdso_dctx);
return 0;
}
/* cache */
strcpy(pe_mdso_lib_ptr->ar_name,pe_mdso_tmp_lib_name);
pe_mdso_lib_ptr->st_dev = st.st_dev;
pe_mdso_lib_ptr->st_ino = st.st_ino;
pe_mdso_lib_ptr++;
/* all done */
unlink(pe_perk_tmp_def_name);
mdso_free_driver_ctx(mdso_dctx);
close(fdout);
return pe_mdso_tmp_lib_name;
}
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