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x86-64: Save APX registers in ld.so trampoline
Add APX registers to STATE_SAVE_MASK so that APX registers are saved in ld.so trampoline. This fixes BZ #31371. Also update STATE_SAVE_OFFSET and STATE_SAVE_MASK for i386 which will be used by i386 _dl_tlsdesc_dynamic. Reviewed-by: Noah Goldstein <goldstein.w.n@gmail.com>
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@ -21,14 +21,54 @@
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#include <sysdeps/generic/sysdep.h>
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/* The extended state feature IDs in the state component bitmap. */
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#define X86_XSTATE_X87_ID 0
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#define X86_XSTATE_SSE_ID 1
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#define X86_XSTATE_AVX_ID 2
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#define X86_XSTATE_BNDREGS_ID 3
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#define X86_XSTATE_BNDCFG_ID 4
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#define X86_XSTATE_K_ID 5
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#define X86_XSTATE_ZMM_H_ID 6
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#define X86_XSTATE_ZMM_ID 7
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#define X86_XSTATE_PKRU_ID 9
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#define X86_XSTATE_TILECFG_ID 17
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#define X86_XSTATE_TILEDATA_ID 18
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#define X86_XSTATE_APX_F_ID 19
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#ifdef __x86_64__
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/* Offset for fxsave/xsave area used by _dl_runtime_resolve. Also need
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space to preserve RCX, RDX, RSI, RDI, R8, R9 and RAX. It must be
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aligned to 16 bytes for fxsave and 64 bytes for xsave. */
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aligned to 16 bytes for fxsave and 64 bytes for xsave.
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NB: Is is non-zero because of the 128-byte red-zone. Some registers
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are saved on stack without adjusting stack pointer first. When we
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update stack pointer to allocate more space, we need to take the
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red-zone into account. */
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# define STATE_SAVE_OFFSET (8 * 7 + 8)
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/* Save SSE, AVX, AVX512, mask and bound registers. */
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/* Save SSE, AVX, AVX512, mask, bound and APX registers. Bound and APX
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registers are mutually exclusive. */
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# define STATE_SAVE_MASK \
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((1 << 1) | (1 << 2) | (1 << 3) | (1 << 5) | (1 << 6) | (1 << 7))
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((1 << X86_XSTATE_SSE_ID) \
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| (1 << X86_XSTATE_AVX_ID) \
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| (1 << X86_XSTATE_BNDREGS_ID) \
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| (1 << X86_XSTATE_K_ID) \
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| (1 << X86_XSTATE_ZMM_H_ID) \
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| (1 << X86_XSTATE_ZMM_ID) \
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| (1 << X86_XSTATE_APX_F_ID))
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#else
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/* Offset for fxsave/xsave area used by _dl_tlsdesc_dynamic. Since i386
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doesn't have red-zone, use 0 here. */
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# define STATE_SAVE_OFFSET 0
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/* Save SSE, AVX, AXV512, mask and bound registers. */
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# define STATE_SAVE_MASK \
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((1 << X86_XSTATE_SSE_ID) \
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| (1 << X86_XSTATE_AVX_ID) \
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| (1 << X86_XSTATE_BNDREGS_ID) \
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| (1 << X86_XSTATE_K_ID) \
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| (1 << X86_XSTATE_ZMM_H_ID))
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#endif
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/* Constants for bits in __x86_string_control: */
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