diff options
Diffstat (limited to 'test/libelf/tset/elf_getdata/getdata.m4')
| -rw-r--r-- | test/libelf/tset/elf_getdata/getdata.m4 | 176 |
1 files changed, 162 insertions, 14 deletions
diff --git a/test/libelf/tset/elf_getdata/getdata.m4 b/test/libelf/tset/elf_getdata/getdata.m4 index 40afc8a4ec300..332f81bcebe34 100644 --- a/test/libelf/tset/elf_getdata/getdata.m4 +++ b/test/libelf/tset/elf_getdata/getdata.m4 @@ -23,7 +23,7 @@ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * - * $Id: getdata.m4 2090 2011-10-27 08:07:39Z jkoshy $ + * $Id: getdata.m4 3695 2019-02-25 18:55:07Z jkoshy $ */ #include <libelf.h> @@ -68,6 +68,36 @@ findscn(Elf *e, const char *name) return (NULL); } +/* + * Check the contents of an Elf_Data descriptor. + * + * The return value from this helper is as follows: + * + * 0 - the descriptor matched the specified content. + * -1 - the descriptor size had a mismatch. + * >0 - the content of the descriptor did not match. The returned value + * is the index of the first byte that differs. + */ +static int +match_content(Elf_Data *ed, size_t nbytes, const char *content) +{ + int n; + const char *buf; + + if (ed->d_size != nbytes) + return (-1); + + buf = (const char *) ed->d_buf; + for (n = 0; n < nbytes; n++) { + if (*buf != *content) + return (n); + buf++; + content++; + } + + return (0); +} + define(`ZEROSECTION',".zerosection") undefine(`FN') define(`FN',` @@ -106,6 +136,11 @@ tcZeroSection$1$2(void) goto done; } + if ((ed = elf_getdata(scn, ed)) != NULL) { + TP_FAIL("Extra data descriptor in section."); + goto done; + } + result = TET_PASS; done: @@ -139,16 +174,17 @@ define(`_FN',` void tcNonZeroSection$1$2(void) { - Elf *e; int error, fd, result; - const size_t strsectionsize = sizeof stringsection; - size_t n, shstrndx; + int match_error; + size_t shstrndx; const char *buf; Elf_Scn *scn; Elf_Data *ed; + Elf *e; - e = NULL; fd = -1; + e = NULL; + scn = NULL; result = TET_UNRESOLVED; TP_ANNOUNCE("a data descriptor for a non-zero sized section " @@ -170,19 +206,22 @@ tcNonZeroSection$1$2(void) goto done; } - if (ed->d_size != strsectionsize) { + match_error = match_content(ed, sizeof(stringsection), + stringsection); + if (match_error == -1) { TP_FAIL("Illegal values returned: d_size %d != expected %d", - (int) ed->d_size, strsectionsize); + (int) ed->d_size, sizeof(stringsection)); goto done; - } - - if (memcmp(stringsection, ed->d_buf, strsectionsize) != 0) { + } else if (match_error > 0) { buf = (const char *) ed->d_buf; - for (n = 0; n < strsectionsize; n++) - if (buf[n] != stringsection[n]) - break; TP_FAIL("String mismatch: buf[%d] \"%c\" != \"%c\"", - n, buf[n], stringsection[n]); + match_error, buf[match_error], + stringsection[match_error]); + goto done; + } + + if ((ed = elf_getdata(scn, ed)) != NULL) { + TP_FAIL("Extra data descriptor in section."); goto done; } @@ -201,3 +240,112 @@ _FN(lsb,32) _FN(lsb,64) _FN(msb,32) _FN(msb,64) + +static const char new_content[] = { +changequote({,}) + 'n', 'e', 'w', ' ', 'c', 'o', 'n', 't', 'e', 'n', 't', '\0' +changequote +}; + +/* + * Verify that a section with multiple Elf_Data segments is handled correctly. + */ +undefine(`_FN') +define(`_FN',` +void +tcDataTraversal$1$2(void) +{ + Elf *e; + Elf_Scn *scn; + Elf_Data *ed; + size_t shstrndx; + int error, fd, match_error, result; + + e = NULL; + fd = -1; + result = TET_UNRESOLVED; + + TP_ANNOUNCE("multiple Elf_Data segments can be traversed."); + _TS_OPEN_FILE(e, "zerosection.$1$2", ELF_C_READ, fd, goto done;); + + if (elf_getshdrstrndx(e, &shstrndx) != 0 || + (scn = elf_getscn(e, shstrndx)) == NULL) { + TP_UNRESOLVED("Cannot find the string table"); + goto done; + } + + /* + * Add new data to the string section. + */ + if ((ed = elf_newdata(scn)) == NULL) { + TP_UNRESOLVED("Cannot allocate new data."); + goto done; + } + + ed->d_buf = (char *) new_content; + ed->d_size = sizeof(new_content); + + /* + * Rescan the descriptor list for the section. + */ + ed = NULL; + if ((ed = elf_getdata(scn, ed)) == NULL) { + error = elf_errno(); + TP_FAIL("elf_getdata failed %d \"%s\"", error, + elf_errmsg(error)); + goto done; + } + + match_error = match_content(ed, sizeof(stringsection), + stringsection); + if (match_error == -1) { + TP_FAIL("Unexpected size of first descriptor: " + "d_size %d != expected %d", (int) ed->d_size, + sizeof(stringsection)); + goto done; + } else if (match_error > 0) { + TP_FAIL("String content mismatch for data descriptor 1."); + goto done; + } + + if ((ed = elf_getdata(scn, ed)) == NULL) { + error = elf_errno(); + TP_FAIL("Missing second data section: %d \"%s\"", error, + elf_errmsg(error)); + goto done; + } + + match_error = match_content(ed, sizeof(new_content), + new_content); + if (match_error == -1) { + TP_FAIL("Unexpected size of second descriptor: " + "d_size %d != expected %d", (int) ed->d_size, + sizeof(new_content)); + goto done; + } else if (match_error > 0) { + TP_FAIL("String content mismatch for data descriptor 2."); + goto done; + } + + /* + * There should be no other Elf_Data descriptors. + */ + if ((ed = elf_getdata(scn, ed)) != NULL) { + TP_FAIL("Too many Elf_Data descriptors for section."); + goto done; + } + + result = TET_PASS; + +done: + if (e) + elf_end(e); + if (fd != -1) + (void) close(fd); + tet_result(result); +}') + +_FN(lsb,32) +_FN(lsb,64) +_FN(msb,32) +_FN(msb,64) |