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-rw-r--r--src/main/pe_get_image_meta.c184
-rw-r--r--src/main/pe_map_raw_image.c40
-rw-r--r--src/main/perk.c116
3 files changed, 340 insertions, 0 deletions
diff --git a/src/main/pe_get_image_meta.c b/src/main/pe_get_image_meta.c
new file mode 100644
index 0000000..454f233
--- /dev/null
+++ b/src/main/pe_get_image_meta.c
@@ -0,0 +1,184 @@
+#include <stdint.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+
+#include <perk/perk.h>
+#include "perk_impl.h"
+
+static int pe_free_image_meta_impl (struct pe_image_meta * meta, int status)
+{
+ if (!meta) return 0;
+
+ free(meta->sectbl);
+ free(meta);
+
+ return status;
+}
+
+int pe_free_image_meta (struct pe_image_meta * meta)
+{
+ return pe_free_image_meta_impl(meta,0);
+}
+
+int pe_get_named_section_index (const struct pe_image_meta * m, const char * name)
+{
+ int i; for (i=0; i<m->coff.num_of_sections; i++)
+ if (!(strcmp(name,m->sectbl[i].name)))
+ return i;
+
+ return -1;
+}
+
+int pe_get_block_section_index (const struct pe_image_meta * m, const struct pe_block * block)
+{
+ int i;
+ uint32_t low,high;
+
+ for (i=0; i<m->coff.num_of_sections; i++) {
+ low = m->sectbl[i].virtual_addr;
+ high = low + m->sectbl[i].virtual_size;
+
+ if ((block->rva >= low) && (block->rva + block->size <= high))
+ return i;
+ }
+
+ return -1;
+}
+
+int pe_get_image_meta (const struct pe_raw_image * image, struct pe_image_meta ** meta)
+{
+ int i,j,s,status;
+ struct pe_image_meta * m;
+ char * base = image->addr;
+
+ if (!(m = calloc(1,sizeof(*m))))
+ return errno;
+
+ m->ados = (struct pe_image_dos_hdr *)base;
+
+ if ((status = (pe_read_dos_header(m->ados,&m->dos))))
+ return pe_free_image_meta_impl(m,status);
+
+ m->acoff = (struct pe_coff_file_hdr *)(base + m->dos.dos_lfanew);
+
+ if ((status = (pe_read_coff_header(m->acoff,&m->coff))))
+ return pe_free_image_meta_impl(m,status);
+
+ m->aopt = (union pe_opt_hdr *)((char *)m->acoff + sizeof(m->coff));
+
+ if ((status = (pe_read_optional_header(m->aopt,&m->opt))))
+ return pe_free_image_meta_impl(m,status);
+
+ m->asectbl = (struct pe_sec_hdr *)((char *)m->aopt + m->coff.size_of_opt_hdr);
+
+ if (!(m->sectbl = calloc(m->coff.num_of_sections,sizeof(*(m->sectbl)))))
+ return pe_free_image_meta_impl(m,status);
+
+ for (i=0; i<m->coff.num_of_sections; i++)
+ pe_read_section_header(&m->asectbl[i],&m->sectbl[i]);
+
+ /* .edata */
+ i = pe_get_named_section_index(m,".edata");
+ s = pe_get_block_section_index(m,&m->opt.dirs.export_tbl);
+
+ if ((i >= 0) && (i != s))
+ return pe_free_image_meta_impl(m,PERK_MALFORMED_IMAGE);
+
+ if (i >= 0 ) {
+ m->hedata = &m->sectbl[i];
+ m->aedata = (struct pe_export_hdr *)(base + m->sectbl[i].ptr_to_raw_data);
+ } else if (s >= 0) {
+ m->hedata = &m->sectbl[s];
+ m->aedata = (struct pe_export_hdr *)(base + m->sectbl[s].ptr_to_raw_data
+ + m->opt.dirs.export_tbl.rva - m->sectbl[s].virtual_addr);
+ }
+
+ if (m->aedata)
+ pe_read_export_header(m->aedata,&m->edata);
+
+ /* .idata */
+ struct pe_import_hdr * pidata;
+ struct pe_import_lookup_item * pitem;
+
+ i = pe_get_named_section_index(m,".idata");
+ s = pe_get_block_section_index(m,&m->opt.dirs.import_tbl);
+
+ if ((i >= 0) && (i != s))
+ return pe_free_image_meta_impl(m,PERK_MALFORMED_IMAGE);
+
+ if (i >= 0 ) {
+ m->hidata = &m->sectbl[i];
+ m->aidata = (struct pe_import_hdr *)(base + m->sectbl[i].ptr_to_raw_data);
+ } else if (s >= 0) {
+ m->hidata = &m->sectbl[s];
+ m->aidata = (struct pe_import_hdr *)(base + m->sectbl[s].ptr_to_raw_data
+ + m->opt.dirs.import_tbl.rva - m->sectbl[s].virtual_addr);
+ }
+
+ if (m->aidata) {
+ /* num of implibs */
+ for (pidata=m->aidata; pidata->name_rva[0]; pidata++,m->summary.num_of_implibs++);
+
+ /* import headers */
+ if (!(m->idata = calloc(m->summary.num_of_implibs,sizeof(*(m->idata)))))
+ return pe_free_image_meta_impl(m,status);
+
+ for (i=0; i<m->summary.num_of_implibs; i++) {
+ pe_read_import_header(&m->aidata[i],&m->idata[i]);
+
+ m->idata[i].name = base + m->hidata->ptr_to_raw_data
+ + m->idata[i].name_rva - m->hidata->virtual_addr;
+
+ m->idata[i].aitems = (struct pe_import_lookup_item *)(base + m->hidata->ptr_to_raw_data
+ + m->idata[i].import_lookup_tbl_rva - m->hidata->virtual_addr);
+
+ printf("%s\n",m->idata[i].name);
+
+ /* items */
+ m->idata[i].count = 0;
+ for (pitem=m->idata[i].aitems; *(uint32_t *)pitem->u.hint_name_tbl_rva; pitem++)
+ m->idata[i].count++;
+
+ if (!(m->idata[i].items = calloc(m->idata[i].count,sizeof(*(m->idata[i].items)))))
+ return pe_free_image_meta_impl(m,status);
+
+ for (j=0; j<m->idata[i].count; j++) {
+ if ((status = pe_read_import_lookup_item(
+ &(m->idata[i].aitems[j]),
+ &(m->idata[i].items[j]),
+ m->opt.std.magic)))
+ return pe_free_image_meta_impl(m,status);
+
+ switch (m->opt.std.magic) {
+ case PE_MAGIC_PE32:
+ m->idata[i].items[j].flags = m->idata[i].items[j].u.import_lookup_entry_32;
+ break;
+
+ case PE_MAGIC_PE32_PLUS:
+ m->idata[i].items[j].flags = (m->idata[i].items[j].u.import_lookup_entry_64 >> 32);
+ break;
+ }
+
+ struct pe_hint_name_entry * pentry = (struct pe_hint_name_entry *)(base + m->hidata->ptr_to_raw_data
+ + m->idata[i].items[j].u.hint_name_tbl_rva - m->hidata->virtual_addr);
+
+ if (m->idata[i].items[j].flags)
+ m->idata[i].items[j].hint = pe_read_short(pentry->hint);
+ else {
+ m->idata[i].items[j].name = (char *)pentry->name;
+ printf("%s\n",m->idata[i].items[j].name);
+ }
+ }
+ }
+ }
+
+ /* image */
+ m->image.addr = image->addr;
+ m->image.size = image->size;
+
+ /* all done */
+ *meta = m;
+ return 0;
+}
diff --git a/src/main/pe_map_raw_image.c b/src/main/pe_map_raw_image.c
new file mode 100644
index 0000000..8ae95d9
--- /dev/null
+++ b/src/main/pe_map_raw_image.c
@@ -0,0 +1,40 @@
+#include <stdint.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <errno.h>
+#include <sys/mman.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <perk/perk.h>
+
+int pe_map_raw_image (int fd, const char * fname, struct pe_raw_image * map)
+{
+ struct stat stat;
+ int nfd, ret;
+
+ if ((nfd = !fd))
+ fd = open(fname,O_RDONLY | O_CLOEXEC);
+
+ if ((fd < 0) || (fstat(fd,&stat) < 0))
+ return errno;
+
+ map->size = stat.st_size;
+ map->addr = (char *)mmap(0,map->size,PROT_READ,MAP_PRIVATE,fd,0);
+
+ if (map->addr == MAP_FAILED) {
+ map->addr = 0;
+ ret = PERK_MAP_ERROR;
+ } else
+ ret = 0;
+
+ if (nfd) close(fd);
+
+ return ret;
+}
+
+int pe_unmap_raw_image (struct pe_raw_image * map)
+{
+ return munmap(map->addr, map->size);
+};
diff --git a/src/main/perk.c b/src/main/perk.c
new file mode 100644
index 0000000..5fe8f17
--- /dev/null
+++ b/src/main/perk.c
@@ -0,0 +1,116 @@
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <malloc.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <limits.h>
+#include <errno.h>
+#include <sys/mman.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#include <perk/perk.h>
+#include "perk_impl.h"
+
+static int perk_parse_opts(struct perk_ctx * ctx)
+{
+ int i;
+ char * ch;
+ const char ** popt;
+
+ for (i=1; i<ctx->argc; i++) {
+ ch = ctx->argv[i];
+
+ if (*ch == '-') {
+ switch (*++ch) {
+ case 'i':
+ popt = &ctx->fname;
+ break;
+ case 'h':
+ ctx->flags = PERK_HELP;
+ return 0;
+ default:
+ ctx->status = PERK_BAD_OPT;
+ return ctx->status;
+ }
+
+ while ((*++ch == '\t') || (*ch == ' '));
+
+ if (!*ch) {
+ if (++i < ctx->argc)
+ *popt = ctx->argv[i];
+ else
+ ctx->status = PERK_BAD_OPT_VAL;
+ } else
+ *popt = ch;
+ } else if (!ctx->fname)
+ ctx->fname = ch;
+ else
+ ctx->status = PERK_BAD_OPT;
+
+ }
+
+ return ctx->status;
+}
+
+
+static int perk_map_input(struct perk_ctx * ctx)
+{
+ ctx->fd = open(ctx->fname,O_RDONLY | O_CLOEXEC);
+
+ if (ctx->fd < 0) {
+ ctx->status = PERK_IO_ERROR;
+ return ctx->status;
+ }
+
+ ctx->status = pe_map_raw_image(ctx->fd,0,&ctx->map);
+
+ return ctx->status;
+}
+
+
+static int perk_exit(struct perk_ctx * ctx)
+{
+ if (ctx->map.addr)
+ pe_unmap_raw_image(&ctx->map);
+
+ return ctx->status;
+}
+
+
+static int perk_run(struct perk_ctx * ctx)
+{
+ struct pe_image_meta * meta;
+
+ if (perk_map_input(ctx))
+ return perk_exit(ctx);
+
+ if ((ctx->status = pe_get_image_meta(&ctx->map,&meta)))
+ return perk_exit(ctx);
+
+ /* pre-alpha default output */
+ pe_output_export_symbols(
+ meta,
+ PERK_OUTPUT_FORMAT_LIST | PERK_OUTPUT_FIELD_NAME,
+ stdout);
+
+ ctx->status = pe_free_image_meta(meta);
+
+ return perk_exit(ctx);
+}
+
+static int perk_main(int argc, char * argv[], char * envp[])
+{
+ struct perk_ctx ctx = {argc,argv,envp};
+
+ if (perk_parse_opts(&ctx))
+ return ctx.status;
+ else
+ return perk_run(&ctx);
+}
+
+#ifdef PERK_APP
+extern __typeof(perk_main) main __attribute__((alias("perk_main")));
+#endif
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