diff options
Diffstat (limited to 'tests/tcctest.c')
| -rw-r--r-- | tests/tcctest.c | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/tests/tcctest.c b/tests/tcctest.c index f8e2040..b8e534f 100644 --- a/tests/tcctest.c +++ b/tests/tcctest.c @@ -2741,6 +2741,28 @@ void override_func2 (void) printf ("asmc: override2\n"); } +/* This checks a construct used by the linux kernel to encode + references to strings by PC relative references. */ +extern int bug_table[] __attribute__((section("__bug_table"))); +char * get_asm_string (void) +{ + extern int some_symbol; + asm volatile (".globl some_symbol\n" + "jmp .+6\n" + "1:\n" + "some_symbol: .long 0\n" + ".pushsection __bug_table, \"a\"\n" + ".globl bug_table\n" + "bug_table:\n" + /* The first entry (1b-2b) is unused in this test, + but we include it to check if cross-section + PC-relative references work. */ + "2:\t.long 1b - 2b, %c0 - 2b\n" + ".popsection\n" : : "i" ("A string")); + char * str = ((char*)bug_table) + bug_table[1]; + return str; +} + unsigned int set; void asm_test(void) @@ -2812,6 +2834,7 @@ void asm_test(void) if (!somebool) printf("asmbool: failed\n"); #endif + printf("asmstr: %s\n", get_asm_string()); return; label1: goto label2; |