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https://sourceware.org/git/glibc.git
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fe27057d17
* sysdeps/unix/x86_64/sysdep.S [USE_TLS && HAVE___THREAD] [! PIC]: Use direct-%fs form of TLS access for errno. * sysdeps/unix/sysv/linux/i386/i686/sysdep.h: File removed, since the i386 version has all the same asm now. * sysdeps/i386/elf/configure.in: Add @GOTNTPOFF and @NTPOFF uses to the TLS support check. * sysdeps/i386/elf/configure: Regenerated. * sysdeps/unix/sysv/linux/i386/sysdep.h [USE_TLS && HAVE___THREAD] (SYSCALL_ERROR_HANDLER): Use direct-%gs form of TLS access for errno. * sysdeps/unix/i386/sysdep.S (syscall_error) [USE_TLS && HAVE___THREAD]: Use TLS access for errno.
214 lines
6.6 KiB
C
214 lines
6.6 KiB
C
/* Macros to support TLS testing in times of missing compiler support. */
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#define COMMON_INT_DEF(x) \
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asm (".tls_common " #x ",4,4")
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/* XXX Until we get compiler support we don't need declarations. */
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#define COMMON_INT_DECL(x)
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/* XXX This definition will probably be machine specific, too. */
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#define VAR_INT_DEF(x) \
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asm (".section .tdata\n\t" \
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".globl " #x "\n" \
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#x ":\t.long 0\n\t" \
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".size " #x ",4\n\t" \
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".previous")
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/* XXX Until we get compiler support we don't need declarations. */
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#define VAR_INT_DECL(x)
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/* XXX Each architecture must have its own asm for now. */
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#ifdef __i386__
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# define TLS_LE(x) \
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({ int *__l; \
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asm ("movl %%gs:0,%0\n\t" \
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"subl $" #x "@tpoff,%0" \
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: "=r" (__l)); \
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__l; })
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# ifdef PIC
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# define TLS_IE(x) \
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({ int *__l; \
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asm ("movl %%gs:0,%0\n\t" \
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"subl " #x "@gottpoff(%%ebx),%0" \
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: "=r" (__l)); \
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__l; })
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# else
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# define TLS_IE(x) \
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({ int *__l, __b; \
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asm ("call 1f\n\t" \
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".subsection 1\n" \
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"1:\tmovl (%%esp), %%ebx\n\t" \
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"ret\n\t" \
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".previous\n\t" \
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"addl $_GLOBAL_OFFSET_TABLE_, %%ebx\n\t" \
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"movl %%gs:0,%0\n\t" \
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"subl " #x "@gottpoff(%%ebx),%0" \
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: "=r" (__l), "=&b" (__b)); \
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__l; })
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# endif
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# ifdef PIC
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# define TLS_LD(x) \
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({ int *__l, __c, __d; \
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asm ("leal " #x "@tlsldm(%%ebx),%%eax\n\t" \
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"call ___tls_get_addr@plt\n\t" \
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"leal " #x "@dtpoff(%%eax), %%eax" \
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: "=a" (__l), "=&c" (__c), "=&d" (__d)); \
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__l; })
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# else
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# define TLS_LD(x) \
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({ int *__l, __b, __c, __d; \
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asm ("call 1f\n\t" \
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".subsection 1\n" \
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"1:\tmovl (%%esp), %%ebx\n\t" \
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"ret\n\t" \
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".previous\n\t" \
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"addl $_GLOBAL_OFFSET_TABLE_, %%ebx\n\t" \
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"leal " #x "@tlsldm(%%ebx),%%eax\n\t" \
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"call ___tls_get_addr@plt\n\t" \
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"leal " #x "@dtpoff(%%eax), %%eax" \
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: "=a" (__l), "=&b" (__b), "=&c" (__c), "=&d" (__d)); \
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__l; })
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# endif
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# ifdef PIC
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# define TLS_GD(x) \
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({ int *__l, __c, __d; \
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asm ("leal " #x "@tlsgd(%%ebx),%%eax\n\t" \
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"call ___tls_get_addr@plt\n\t" \
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"nop" \
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: "=a" (__l), "=&c" (__c), "=&d" (__d)); \
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__l; })
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# else
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# define TLS_GD(x) \
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({ int *__l, __b, __c, __d; \
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asm ("call 1f\n\t" \
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".subsection 1\n" \
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"1:\tmovl (%%esp), %%ebx\n\t" \
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"ret\n\t" \
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".previous\n\t" \
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"addl $_GLOBAL_OFFSET_TABLE_, %%ebx\n\t" \
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"leal " #x "@tlsgd(%%ebx),%%eax\n\t" \
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"call ___tls_get_addr@plt\n\t" \
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"nop" \
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: "=a" (__l), "=&b" (__b), "=&c" (__c), "=&d" (__d)); \
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__l; })
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# endif
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#elif defined __x86_64__
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# define TLS_LE(x) \
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({ int *__l; \
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asm ("movq %%fs:0,%0\n\t" \
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"leaq " #x "@tpoff(%0), %0" \
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: "=r" (__l)); \
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__l; })
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# define TLS_IE(x) \
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({ int *__l; \
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asm ("movq %%fs:0,%0\n\t" \
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"addq " #x "@gottpoff(%%rip),%0" \
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: "=r" (__l)); \
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__l; })
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# define TLS_LD(x) \
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({ int *__l, __c, __d; \
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asm ("leaq " #x "@tlsld(%%rip),%%rdi\n\t" \
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"call __tls_get_addr@plt\n\t" \
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"leaq " #x "@dtpoff(%%rax), %%rax" \
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: "=a" (__l), "=&c" (__c), "=&d" (__d) \
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: : "rdi", "rsi", "r8", "r9", "r10", "r11"); \
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__l; })
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# define TLS_GD(x) \
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({ int *__l, __c, __d; \
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asm (".long 0x66666666\n\t" \
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"leaq " #x "@tlsgd(%%rip),%%rdi\n\t" \
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"call __tls_get_addr@plt" \
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: "=a" (__l), "=&c" (__c), "=&d" (__d) \
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: : "rdi", "rsi", "r8", "r9", "r10", "r11"); \
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__l; })
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#elif defined __sh__
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# define TLS_LE(x) \
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({ int *__l; void *__tp; \
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asm ("stc gbr,%1\n\t" \
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"mov.l 1f,%0\n\t" \
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"bra 2f\n\t" \
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" add %1,%0\n\t" \
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".align 2\n\t" \
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"1: .long " #x "@tpoff\n\t" \
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"2:" \
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: "=r" (__l), "=r" (__tp)); \
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__l; })
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# define TLS_IE(x) \
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({ int *__l; void *__tp; \
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asm ("mova 0f,r0\n\t" \
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"mov.l 0f,r12\n\t" \
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"add r0,r12\n\t" \
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"mov.l 1f,r0\n\t" \
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"stc gbr,%1\n\t" \
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"mov.l @(r0,r12),%0\n\t" \
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"bra 2f\n\t" \
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" add %1,%0\n\t" \
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".align 2\n\t" \
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"0: .long _GLOBAL_OFFSET_TABLE_\n\t" \
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"1: .long " #x "@gottpoff\n\t" \
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"2:" \
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: "=r" (__l), "=r" (__tp) : : "r0", "r12"); \
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__l; })
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# define TLS_LD(x) \
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({ int *__l; \
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asm ("mova 0f,r0\n\t" \
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"mov.l 0f,r12\n\t" \
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"add r0,r12\n\t" \
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"mov.l 1f,r4\n\t" \
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"add r12,r4\n\t" \
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"mova 2f,r0\n\t" \
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"mov.l 2f,r1\n\t" \
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"add r0,r1\n\t" \
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"jsr @r1\n\t" \
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" nop\n\t" \
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"mov.l 3f,%0\n\t" \
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"bra 4f\n\t" \
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" add r0,%0\n\t" \
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".align 2\n\t" \
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"0: .long _GLOBAL_OFFSET_TABLE_\n\t" \
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"1: .long " #x "@tlsldm\n\t" \
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"2: .long __tls_get_addr@plt\n\t" \
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"3: .long " #x "@dtpoff\n\t" \
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"4:" \
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: "=r" (__l) : : "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
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"r12", "pr", "t"); \
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__l; })
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# define TLS_GD(x) \
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({ int *__l; \
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asm ("mova 0f,r0\n\t" \
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"mov.l 0f,r12\n\t" \
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"add r0,r12\n\t" \
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"mov.l 1f,r4\n\t" \
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"add r12,r4\n\t" \
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"mova 2f,r0\n\t" \
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"mov.l 2f,r1\n\t" \
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"add r0,r1\n\t" \
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"jsr @r1\n\t" \
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" nop\n\t" \
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"bra 3f\n\t" \
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" mov r0,%0\n\t" \
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".align 2\n\t" \
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"0: .long _GLOBAL_OFFSET_TABLE_\n\t" \
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"1: .long " #x "@tlsgd\n\t" \
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"2: .long __tls_get_addr@plt\n\t" \
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"3:" \
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: "=r" (__l) : : "r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", \
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"r12", "pr", "t"); \
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__l; })
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#else
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# error "No support for this architecture so far."
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#endif
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