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fce3da82e5
This patch also clobbers r14 in TLS_LD, TLS_GD macros on 31bit.
This ensures that r14 isn't used to save and restore r12 while
r14 is clobbered by the bas-instruction.
As note:
r12 can't be added to clobber list as gcc would fail with:
error: PIC register clobbered by ‘12’ in ‘asm’
For 64bit this fix was already done in 2004 in the
commit b80af23ac6.
ChangeLog:
* sysdeps/s390/s390-32/tls-macros.h (TLS_LD, TLS_GD):
Clobber also r14.
105 lines
4.1 KiB
C
105 lines
4.1 KiB
C
#define TLS_LE(x) \
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({ unsigned long __offset; \
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__asm__ ("bras %0,1f\n" \
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"0:\t.long " #x "@ntpoff\n" \
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"1:\tl %0,0(%0)" \
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: "=a" (__offset) : : "cc" ); \
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(int *) (__builtin_thread_pointer() + __offset); })
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#ifdef PIC
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# define TLS_IE(x) \
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({ unsigned long __offset, __got; \
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__asm__ ("bras %0,1f\n" \
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"0:\t.long _GLOBAL_OFFSET_TABLE_-0b\n\t" \
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".long " #x "@gotntpoff\n" \
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"1:\tl %1,0(%0)\n\t" \
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"la %1,0(%1,%0)\n\t" \
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"l %0,4(%0)\n\t" \
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"l %0,0(%0,%1):tls_load:" #x "\n" \
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: "=&a" (__offset), "=&a" (__got) : : "cc" ); \
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(int *) (__builtin_thread_pointer() + __offset); })
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#else
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# define TLS_IE(x) \
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({ unsigned long __offset; \
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__asm__ ("bras %0,1f\n" \
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"0:\t.long " #x "@indntpoff\n" \
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"1:\t l %0,0(%0)\n\t" \
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"l %0,0(%0):tls_load:" #x \
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: "=&a" (__offset) : : "cc" ); \
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(int *) (__builtin_thread_pointer() + __offset); })
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#endif
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#ifdef PIC
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# define TLS_LD(x) \
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({ unsigned long __offset, __save12; \
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__asm__ ("bras %0,1f\n" \
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"0:\t.long _GLOBAL_OFFSET_TABLE_-0b\n\t" \
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".long __tls_get_offset@plt-0b\n\t" \
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".long " #x "@tlsldm\n\t" \
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".long " #x "@dtpoff\n" \
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"1:\tlr %1,%%r12\n\t" \
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"l %%r12,0(%0)\n\t" \
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"la %%r12,0(%%r12,%0)\n\t" \
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"l %%r1,4(%0)\n\t" \
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"l %%r2,8(%0)\n\t" \
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"bas %%r14,0(%%r1,%0):tls_ldcall:" #x "\n\t" \
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"l %0,12(%0)\n\t" \
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"alr %0,%%r2\n\t" \
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"lr %%r12,%1" \
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: "=&a" (__offset), "=&a" (__save12) \
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: : "cc", "0", "1", "2", "3", "4", "5", "14"); \
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(int *) (__builtin_thread_pointer() + __offset); })
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#else
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# define TLS_LD(x) \
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({ unsigned long __offset; \
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__asm__ ("bras %0,1f\n" \
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"0:\t.long _GLOBAL_OFFSET_TABLE_\n\t" \
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".long __tls_get_offset@plt\n\t" \
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".long " #x "@tlsldm\n\t" \
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".long " #x "@dtpoff\n" \
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"1:\tl %%r12,0(%0)\n\t" \
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"l %%r1,4(%0)\n\t" \
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"l %%r2,8(%0)\n\t" \
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"bas %%r14,0(%%r1):tls_ldcall:" #x "\n\t" \
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"l %0,12(%0)\n\t" \
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"alr %0,%%r2" \
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: "=&a" (__offset) \
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: : "cc", "0", "1", "2", "3", "4", "5", "12", "14"); \
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(int *) (__builtin_thread_pointer() + __offset); })
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#endif
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#ifdef PIC
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# define TLS_GD(x) \
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({ unsigned long __offset, __save12; \
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__asm__ ("bras %0,1f\n" \
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"0:\t.long _GLOBAL_OFFSET_TABLE_-0b\n\t" \
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".long __tls_get_offset@plt-0b\n\t" \
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".long " #x "@tlsgd\n" \
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"1:\tlr %1,%%r12\n\t" \
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"l %%r12,0(%0)\n\t" \
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"la %%r12,0(%%r12,%0)\n\t" \
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"l %%r1,4(%0)\n\t" \
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"l %%r2,8(%0)\n\t" \
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"bas %%r14,0(%%r1,%0):tls_gdcall:" #x "\n\t" \
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"lr %0,%%r2\n\t" \
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"lr %%r12,%1" \
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: "=&a" (__offset), "=&a" (__save12) \
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: : "cc", "0", "1", "2", "3", "4", "5", "14"); \
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(int *) (__builtin_thread_pointer() + __offset); })
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#else
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# define TLS_GD(x) \
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({ unsigned long __offset; \
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__asm__ ("bras %0,1f\n" \
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"0:\t.long _GLOBAL_OFFSET_TABLE_\n\t" \
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".long __tls_get_offset@plt\n\t" \
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".long " #x "@tlsgd\n" \
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"1:\tl %%r12,0(%0)\n\t" \
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"l %%r1,4(%0)\n\t" \
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"l %%r2,8(%0)\n\t" \
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"bas %%r14,0(%%r1):tls_gdcall:" #x "\n\t" \
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"lr %0,%%r2" \
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: "=&a" (__offset) \
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: : "cc", "0", "1", "2", "3", "4", "5", "12", "14"); \
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(int *) (__builtin_thread_pointer() + __offset); })
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#endif
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