diff options
author | norly <ny-git@enpas.org> | 2013-01-25 15:24:36 +0000 |
---|---|---|
committer | norly <ny-git@enpas.org> | 2013-02-11 01:24:36 +0000 |
commit | d9eb4398773cbda1dc185f4cf7b1b0e4cb9fb135 (patch) | |
tree | a2421aa140b17db64df439f894fa892833e3ac96 /src/printing | |
parent | 43e69328d849391abfed996214eed1dca49b3ac3 (diff) |
Print ELF header/segments/sections
Diffstat (limited to 'src/printing')
-rw-r--r-- | src/printing/header.c | 62 | ||||
-rw-r--r-- | src/printing/sections.c | 60 | ||||
-rw-r--r-- | src/printing/segments.c | 76 |
3 files changed, 198 insertions, 0 deletions
diff --git a/src/printing/header.c b/src/printing/header.c new file mode 100644 index 0000000..33f7bdb --- /dev/null +++ b/src/printing/header.c @@ -0,0 +1,62 @@ +#include <stdio.h> + +#include <libelf.h> +#include <gelf.h> + + +void printHeader(Elf *e) +{ + GElf_Ehdr ehdr; + int elfclass; + size_t shdrnum, shdrstrndx, phdrnum; + + + printf("ELF header:\n"); + + + elfclass = gelf_getclass(e); + if (elfclass == ELFCLASSNONE) { + fprintf(stderr, "getclass() failed: %s\n", elf_errmsg(-1)); + } + printf(" * %d-bit ELF object\n", elfclass == ELFCLASS32 ? 32 : 64); + + + if (!gelf_getehdr(e, &ehdr)) { + fprintf(stderr, "getehdr() failed: %s.", elf_errmsg(-1)); + return; + } + + printf(" * type machine version entry phoff shoff flags ehsize phentsize shentsize\n"); + printf(" %8jx %8jx %8jx %8jx %8jx %8jx %8jx %8jx %9jx %9jx\n", + (uintmax_t) ehdr.e_type, + (uintmax_t) ehdr.e_machine, + (uintmax_t) ehdr.e_version, + (uintmax_t) ehdr.e_entry, + (uintmax_t) ehdr.e_phoff, + (uintmax_t) ehdr.e_shoff, + (uintmax_t) ehdr.e_flags, + (uintmax_t) ehdr.e_ehsize, + (uintmax_t) ehdr.e_phentsize, + (uintmax_t) ehdr.e_shentsize); + + + if (elf_getshdrnum(e, &shdrnum) != 0) { + fprintf(stderr, "getshdrnum() failed: %s\n", elf_errmsg(-1)); + } else { + printf(" * (shnum): %u\n", shdrnum); + } + + if (elf_getshdrstrndx(e, &shdrstrndx) != 0) { + fprintf(stderr, "getshdrstrndx() failed: %s\n", elf_errmsg(-1)); + } else { + printf(" * (shstrndx): %u\n", shdrstrndx); + } + + if (elf_getphdrnum(e, &phdrnum) != 0) { + fprintf(stderr, "getphdrnum() failed: %s\n", elf_errmsg(-1)); + } else { + printf(" * (phnum): %u\n", phdrnum); + } + + printf("\n"); +} diff --git a/src/printing/sections.c b/src/printing/sections.c new file mode 100644 index 0000000..6241a73 --- /dev/null +++ b/src/printing/sections.c @@ -0,0 +1,60 @@ +#include <stdio.h> + +#include <libelf.h> +#include <gelf.h> + +#include <libelfu/libelfu.h> +#include "printing.h" + + +void printSegmentsWithSection(Elf *e, Elf_Scn *scn) +{ + GElf_Phdr phdr; + int i; + size_t n; + + + if (elf_getphdrnum(e, &n)) { + fprintf(stderr, "elf_getphdrnum() failed: %s\n", elf_errmsg(-1)); + return; + } + + for (i = 0; i < n; i++) { + ELFU_BOOL isInSeg; + + if (gelf_getphdr(e, i, &phdr) != &phdr) { + fprintf(stderr, "getphdr() failed for #%d: %s\n", i, elf_errmsg(-1)); + continue; + } + + isInSeg = elfu_segmentContainsSection(&phdr, scn); + if (isInSeg == ELFU_TRUE) { + printf(" %d %s\n", i, segmentTypeStr(phdr.p_type)); + } + } +} + + +void printSection(Elf *e, Elf_Scn *scn) +{ + printf(" %jd: %s\n", + (uintmax_t) elf_ndxscn(scn), + elfu_sectionName(e, scn)); +} + + +void printSections(Elf *e) +{ + Elf_Scn *scn; + + printf("Sections:\n"); + + scn = elf_getscn(e, 0); + + while (scn) { + printSection(e, scn); + //printSegmentsWithSection(e, scn); + + scn = elf_nextscn(e, scn); + } +} diff --git a/src/printing/segments.c b/src/printing/segments.c new file mode 100644 index 0000000..6d8cac7 --- /dev/null +++ b/src/printing/segments.c @@ -0,0 +1,76 @@ +#include <stdio.h> + +#include <libelf.h> +#include <gelf.h> + +#include <libelfu/libelfu.h> + + +static char *ptstr[] = {"NULL", "LOAD", "DYNAMIC", "INTERP", "NOTE", "SHLIB", "PHDR", "TLS", "NUM"}; + + +char* segmentTypeStr(size_t pt) +{ + if (pt >= 0 && pt <= PT_NUM) { + return ptstr[pt]; + } + + return "-?-"; +} + + +void printSectionsInSegment(Elf *e, GElf_Phdr *phdr) +{ + Elf_Scn *scn; + + scn = elf_getscn(e, 0); + + while (scn) { + ELFU_BOOL isInSeg; + + isInSeg = elfu_segmentContainsSection(phdr, scn); + if (isInSeg == ELFU_TRUE) { + printf(" %10u %s\n", elf_ndxscn(scn), elfu_sectionName(e, scn)); + } + + scn = elf_nextscn(e, scn); + } +} + + +void printSegments(Elf *e) +{ + size_t i, n; + + if (elf_getphdrnum(e, &n)) { + fprintf(stderr, "elf_getphdrnum() failed: %s.", elf_errmsg(-1)); + } + + printf("Segments:\n"); + printf(" # typeStr type offset vaddr paddr filesz memsz flags align\n"); + + for (i = 0; i < n; i++) { + GElf_Phdr phdr; + + if (gelf_getphdr(e, i, &phdr) != &phdr) { + fprintf(stderr, "getphdr() failed for #%d: %s.", i, elf_errmsg(-1)); + continue; + } + + printf(" * %4d: %8s ", i, segmentTypeStr(phdr.p_type)); + + printf("%8jx %8jx %8jx %8jx %8jx %8jx %8jx %8jx\n", + (uintmax_t) phdr.p_type, + (uintmax_t) phdr.p_offset, + (uintmax_t) phdr.p_vaddr, + (uintmax_t) phdr.p_paddr, + (uintmax_t) phdr.p_filesz, + (uintmax_t) phdr.p_memsz, + (uintmax_t) phdr.p_flags, + (uintmax_t) phdr.p_align); + + printSectionsInSegment(e, &phdr); + } + + printf("\n"); +} |