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Update.
* elf/tst-tls1.c: Move TLS helper macros to... * elf/tls-macros.h: ...here. New file. * elf/tst-tls2.c: New file. * elf/Makefile (tests): Add tst-tls2. (distribute): Add tls-macros.h.
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Ulrich Drepper
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Feb 10, 2002
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,66 @@ | ||
| /* Macros to support TLS testing in times of missing compiler support. */ | ||
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| #define COMMON_INT_DEF(x) \ | ||
| asm (".tls_common " #x ",4,4") | ||
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| /* XXX This definition will probably be machine specific, too. */ | ||
| #define VAR_INT_DEF(x) \ | ||
| asm (".section .tdata\n\t" \ | ||
| ".globl " #x "\n" \ | ||
| #x ":\t.long 0\n\t" \ | ||
| ".previous") | ||
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| /* XXX Each architecture must have its own asm for now. */ | ||
| #ifdef __i386__ | ||
| # define TLS_LE(x) \ | ||
| ({ int *__l; \ | ||
| asm ("movl %%gs:0,%0\n\t" \ | ||
| "subl $" #x "@tpoff,%0" \ | ||
| : "=r" (__l)); \ | ||
| __l; }) | ||
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| #define TLS_IE(x) \ | ||
| ({ int *__l, __b; \ | ||
| asm ("call 1f\n\t" \ | ||
| ".subsection 1\n" \ | ||
| "1:\tmovl (%%esp), %%ebx\n\t" \ | ||
| "ret\n\t" \ | ||
| ".previous\n\t" \ | ||
| "addl $_GLOBAL_OFFSET_TABLE_, %%ebx\n\t" \ | ||
| "movl %%gs:0,%0\n\t" \ | ||
| "subl " #x "@gottpoff(%%ebx),%0" \ | ||
| : "=r" (__l), "=&b" (__b)); \ | ||
| __l; }) | ||
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| #define TLS_LD(x) \ | ||
| ({ int *__l, __b; \ | ||
| asm ("call 1f\n\t" \ | ||
| ".subsection 1\n" \ | ||
| "1:\tmovl (%%esp), %%ebx\n\t" \ | ||
| "ret\n\t" \ | ||
| ".previous\n\t" \ | ||
| "addl $_GLOBAL_OFFSET_TABLE_, %%ebx\n\t" \ | ||
| "leal " #x "@tlsldm(%%ebx),%%eax\n\t" \ | ||
| "call ___tls_get_addr@plt\n\t" \ | ||
| "leal " #x "@dtpoff(%%eax), %%eax" \ | ||
| : "=a" (__l), "=&b" (__b)); \ | ||
| __l; }) | ||
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| #define TLS_GD(x) \ | ||
| ({ int *__l, __b; \ | ||
| asm ("call 1f\n\t" \ | ||
| ".subsection 1\n" \ | ||
| "1:\tmovl (%%esp), %%ebx\n\t" \ | ||
| "ret\n\t" \ | ||
| ".previous\n\t" \ | ||
| "addl $_GLOBAL_OFFSET_TABLE_, %%ebx\n\t" \ | ||
| "leal " #x "@tlsgd(%%ebx),%%eax\n\t" \ | ||
| "call ___tls_get_addr@plt\n\t" \ | ||
| "nop" \ | ||
| : "=a" (__l), "=&b" (__b)); \ | ||
| __l; }) | ||
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| #else | ||
| # error "No support for this architecture so far." | ||
| #endif |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,84 @@ | ||
| /* glibc test for TLS in ld.so. */ | ||
| #include <stdio.h> | ||
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| #include <tls.h> | ||
| #include "tls-macros.h" | ||
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| /* Two 'int' variables in TLS. */ | ||
| VAR_INT_DEF(foo); | ||
| VAR_INT_DEF(bar); | ||
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| int | ||
| main (void) | ||
| { | ||
| #ifdef USE_TLS | ||
| int result = 0; | ||
| int *ap, *bp; | ||
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| /* Set the variable using the local exec model. */ | ||
| puts ("set bar to 1 (LE)"); | ||
| ap = TLS_LE (bar); | ||
| *ap = 1; | ||
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| /* Get variables using initial exec model. */ | ||
| fputs ("get sum of foo and bar (IE)", stdout); | ||
| ap = TLS_IE (foo); | ||
| bp = TLS_IE (bar); | ||
| printf (" = %d\n", *ap + *bp); | ||
| result |= *ap + *bp != 1; | ||
| if (*ap != 0) | ||
| { | ||
| printf ("foo = %d\n", *ap); | ||
| result = 1; | ||
| } | ||
| if (*bp != 1) | ||
| { | ||
| printf ("bar = %d\n", *bp); | ||
| result = 1; | ||
| } | ||
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| /* Get variables using local dynamic model. */ | ||
| fputs ("get sum of foo and bar (LD)", stdout); | ||
| ap = TLS_LD (foo); | ||
| bp = TLS_LD (bar); | ||
| printf (" = %d\n", *ap + *bp); | ||
| result |= *ap + *bp != 1; | ||
| if (*ap != 0) | ||
| { | ||
| printf ("foo = %d\n", *ap); | ||
| result = 1; | ||
| } | ||
| if (*bp != 1) | ||
| { | ||
| printf ("bar = %d\n", *bp); | ||
| result = 1; | ||
| } | ||
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| /* Get variables using generic dynamic model. */ | ||
| fputs ("get sum of foo and bar (GD)", stdout); | ||
| ap = TLS_GD (foo); | ||
| bp = TLS_GD (bar); | ||
| printf (" = %d\n", *ap + *bp); | ||
| result |= *ap + *bp != 1; | ||
| if (*ap != 0) | ||
| { | ||
| printf ("foo = %d\n", *ap); | ||
| result = 1; | ||
| } | ||
| if (*bp != 1) | ||
| { | ||
| printf ("bar = %d\n", *bp); | ||
| result = 1; | ||
| } | ||
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| return result; | ||
| #else | ||
| return 0; | ||
| #endif | ||
| } |