diff options
Diffstat (limited to 'tests/test-i386.c')
| -rw-r--r-- | tests/test-i386.c | 68 |
1 files changed, 61 insertions, 7 deletions
diff --git a/tests/test-i386.c b/tests/test-i386.c index 5e6e6c624c..310a93aebe 100644 --- a/tests/test-i386.c +++ b/tests/test-i386.c @@ -1321,8 +1321,25 @@ void test_code16(void) } #endif -extern char func_lret32; -extern char func_iret32; +#if defined(__x86_64__) +asm(".globl func_lret\n" + "func_lret:\n" + "movl $0x87654641, %eax\n" + "lretq\n"); +#else +asm(".globl func_lret\n" + "func_lret:\n" + "movl $0x87654321, %eax\n" + "lret\n" + + ".globl func_iret\n" + "func_iret:\n" + "movl $0xabcd4321, %eax\n" + "iret\n"); +#endif + +extern char func_lret; +extern char func_iret; void test_misc(void) { @@ -1334,16 +1351,53 @@ void test_misc(void) asm ("xlat" : "=a" (res) : "b" (table), "0" (res)); printf("xlat: EAX=" FMTLX "\n", res); -#if !defined(__x86_64__) +#if defined(__x86_64__) + { + static struct __attribute__((packed)) { + uint32_t offset; + uint16_t seg; + } desc; + long cs_sel; + + asm volatile ("mov %%cs, %0" : "=r" (cs_sel)); + + asm volatile ("push %1\n" + "call func_lret\n" + : "=a" (res) + : "r" (cs_sel) : "memory", "cc"); + printf("func_lret=" FMTLX "\n", res); + + /* NOTE: we assume that &func_lret < 4GB */ + desc.offset = (long)&func_lret; + desc.seg = cs_sel; + + asm volatile ("xor %%rax, %%rax\n" + "rex64 lcall %1\n" + : "=a" (res) + : "m" (desc) + : "memory", "cc"); + printf("func_lret2=" FMTLX "\n", res); + + asm volatile ("push %2\n" + "mov $ 1f, %%rax\n" + "push %%rax\n" + "ljmp %1\n" + "1:\n" + : "=a" (res) + : "m" (desc), "b" (cs_sel) + : "memory", "cc"); + printf("func_lret3=" FMTLX "\n", res); + } +#else asm volatile ("push %%cs ; call %1" : "=a" (res) - : "m" (func_lret32): "memory", "cc"); - printf("func_lret32=" FMTLX "\n", res); + : "m" (func_lret): "memory", "cc"); + printf("func_lret=" FMTLX "\n", res); asm volatile ("pushf ; push %%cs ; call %1" : "=a" (res) - : "m" (func_iret32): "memory", "cc"); - printf("func_iret32=" FMTLX "\n", res); + : "m" (func_iret): "memory", "cc"); + printf("func_iret=" FMTLX "\n", res); #endif #if defined(__x86_64__) |