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7498d7676d
There are a few .set mips* assembler directives used in the MIPS specific
sysdep code that force an instruction to be assembled for a specific ISA.
The reason for these is to allow an instruction to be encoded when it might
not be supported in the current ISA (when the code is run the Linux kernel
will trap and emulate any unsupported instructions). Unfortunately forcing
a specific ISA means that when assembling for a newer ISA, where the
instruction has a different encoding, the wrong encoding will be used.
* sysdeps/mips/bits/atomic.h [_MIPS_SIM == _ABIO32] (MIPS_PUSH_MIPS2):
Only use .set mips2 if the current ISA is below mips2.
* sysdeps/mips/sys/tas.h [_MIPS_SIM == _ABIO32] (_test_and_set):
Likewise.
* sysdeps/mips/nptl/tls.h (READ_THREAD_POINTER): Only use .set
mips32r2 if the current ISA is below mips32r2.
* sysdeps/mips/tls-macros.h (TLS_RDHWR): New define.
(TLS_IE): Updated to use the TLD_RDHWR macro.
(TLS_LE): Likewise.
* sysdeps/unix/mips/sysdep.h (__mips_isa_rev): Moved out of #ifdef
__ASSEMBLER__ condition.
131 lines
3.9 KiB
C
131 lines
3.9 KiB
C
/* Macros to support TLS testing in times of missing compiler support. */
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#include <sys/cdefs.h>
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#include <sys/asm.h>
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#include <sysdep.h>
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#define __STRING2(X) __STRING(X)
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#define ADDU __STRING2(PTR_ADDU)
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#define ADDIU __STRING2(PTR_ADDIU)
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#define LW __STRING2(PTR_L)
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/* Load the GOT pointer, which may not be in $28 in a non-PIC
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(abicalls pic0) function. */
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#ifndef __PIC__
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# if _MIPS_SIM != _ABI64
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# ifndef __mips16
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# define LOAD_GP "move %[tmp], $28\n\tla $28, __gnu_local_gp\n\t"
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# else
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# define LOAD_GP \
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"li %[tmp], %%hi(__gnu_local_gp)\n\t" \
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"sll %[tmp], 16\n\t" \
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"addiu %[tmp], %%lo(__gnu_local_gp)\n\t"
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# endif
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# else
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# define LOAD_GP "move %[tmp], $28\n\tdla $28, __gnu_local_gp\n\t"
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# endif
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# define UNLOAD_GP "\n\tmove $28, %[tmp]"
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#else
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/* MIPS16 (re)creates the GP value using PC-relative instructions. */
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# ifdef __mips16
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# define LOAD_GP \
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"li %[tmp], %%hi(_gp_disp)\n\t" \
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"addiu %0, $pc, %%lo(_gp_disp)\n\t" \
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"sll %[tmp], 16\n\t" \
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"addu %[tmp], %0\n\t"
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# else
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# define LOAD_GP
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# endif
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# define UNLOAD_GP
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#endif
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# if __mips_isa_rev >= 2
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# define TLS_RDHWR "rdhwr\t%0,$29"
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# else
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# define TLS_RDHWR \
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".set push\n\t.set mips32r2\n\t" \
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"rdhwr\t%0,$29\n\t.set pop"
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#endif
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#ifndef __mips16
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# define TLS_GD(x) \
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({ void *__result, *__tmp; \
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extern void *__tls_get_addr (void *); \
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asm (LOAD_GP ADDIU " %0, $28, %%tlsgd(" #x ")" \
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UNLOAD_GP \
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: "=r" (__result), [tmp] "=&r" (__tmp)); \
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(int *)__tls_get_addr (__result); })
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# define TLS_LD(x) \
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({ void *__result, *__tmp; \
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extern void *__tls_get_addr (void *); \
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asm (LOAD_GP ADDIU " %0, $28, %%tlsldm(" #x ")" \
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UNLOAD_GP \
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: "=r" (__result), [tmp] "=&r" (__tmp)); \
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__result = __tls_get_addr (__result); \
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asm ("lui $3,%%dtprel_hi(" #x ")\n\t" \
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"addiu $3,$3,%%dtprel_lo(" #x ")\n\t" \
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ADDU " %0,%0,$3" \
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: "+r" (__result) : : "$3"); \
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__result; })
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# define TLS_IE(x) \
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({ void *__result, *__tmp; \
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asm (TLS_RDHWR \
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: "=v" (__result)); \
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asm (LOAD_GP LW " $3,%%gottprel(" #x ")($28)\n\t" \
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ADDU " %0,%0,$3" \
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UNLOAD_GP \
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: "+r" (__result), [tmp] "=&r" (__tmp) \
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: : "$3"); \
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__result; })
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# define TLS_LE(x) \
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({ void *__result; \
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asm (TLS_RDHWR \
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: "=v" (__result)); \
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asm ("lui $3,%%tprel_hi(" #x ")\n\t" \
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"addiu $3,$3,%%tprel_lo(" #x ")\n\t" \
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ADDU " %0,%0,$3" \
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: "+r" (__result) : : "$3"); \
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__result; })
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#else /* __mips16 */
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/* MIPS16 version. */
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# define TLS_GD(x) \
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({ void *__result, *__tmp; \
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extern void *__tls_get_addr (void *); \
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asm (LOAD_GP ADDIU " %1, %%tlsgd(" #x ")" \
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"\n\tmove %0, %1" \
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: "=d" (__result), [tmp] "=&d" (__tmp)); \
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(int *) __tls_get_addr (__result); })
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# define TLS_LD(x) \
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({ void *__result, *__tmp; \
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extern void *__tls_get_addr (void *); \
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asm (LOAD_GP ADDIU " %1, %%tlsldm(" #x ")" \
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"\n\tmove %0, %1" \
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: "=d" (__result), [tmp] "=&d" (__tmp)); \
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__result = __tls_get_addr (__result); \
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asm ("li $3,%%dtprel_hi(" #x ")\n\t" \
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"sll $3,16\n\t" \
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"addiu $3,%%dtprel_lo(" #x ")\n\t" \
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ADDU " %0,%0,$3" \
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: "+d" (__result) : : "$3"); \
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__result; })
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# define TLS_IE(x) \
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({ void *__result, *__tmp, *__tp; \
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__tp = __builtin_thread_pointer (); \
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asm (LOAD_GP LW " $3,%%gottprel(" #x ")(%1)\n\t" \
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ADDU " %0,%[tp],$3" \
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: "=&d" (__result), [tmp] "=&d" (__tmp) \
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: [tp] "d" (__tp) : "$3"); \
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__result; })
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# define TLS_LE(x) \
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({ void *__result, *__tp; \
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__tp = __builtin_thread_pointer (); \
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asm ("li $3,%%tprel_hi(" #x ")\n\t" \
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"sll $3,16\n\t" \
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"addiu $3,%%tprel_lo(" #x ")\n\t" \
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ADDU " %0,%[tp],$3" \
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: "=d" (__result) : [tp] "d" (__tp) : "$3"); \
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__result; })
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#endif /* __mips16 */
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