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x86-64: Save APX registers in ld.so trampoline

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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>
This commit is contained in:
H.J. Lu 2024-02-16 07:17:10 -08:00
parent 0a4d6c8254
commit dfb05f8e70
1 changed files with 45 additions and 5 deletions
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50
sysdeps/x86/sysdep.h
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@ -21,14 +21,54 @@
#include <sysdeps/generic/sysdep.h> #include <sysdeps/generic/sysdep.h>
/* The extended state feature IDs in the state component bitmap. */
#define X86_XSTATE_X87_ID 0
#define X86_XSTATE_SSE_ID 1
#define X86_XSTATE_AVX_ID 2
#define X86_XSTATE_BNDREGS_ID 3
#define X86_XSTATE_BNDCFG_ID 4
#define X86_XSTATE_K_ID 5
#define X86_XSTATE_ZMM_H_ID 6
#define X86_XSTATE_ZMM_ID 7
#define X86_XSTATE_PKRU_ID 9
#define X86_XSTATE_TILECFG_ID 17
#define X86_XSTATE_TILEDATA_ID 18
#define X86_XSTATE_APX_F_ID 19
#ifdef __x86_64__
/* Offset for fxsave/xsave area used by _dl_runtime_resolve. Also need /* Offset for fxsave/xsave area used by _dl_runtime_resolve. Also need
space to preserve RCX, RDX, RSI, RDI, R8, R9 and RAX. It must be space to preserve RCX, RDX, RSI, RDI, R8, R9 and RAX. It must be
aligned to 16 bytes for fxsave and 64 bytes for xsave. */ aligned to 16 bytes for fxsave and 64 bytes for xsave.
#define STATE_SAVE_OFFSET (8 * 7 + 8)
/* Save SSE, AVX, AVX512, mask and bound registers. */ NB: Is is non-zero because of the 128-byte red-zone. Some registers
#define STATE_SAVE_MASK \ are saved on stack without adjusting stack pointer first. When we
((1 << 1) | (1 << 2) | (1 << 3) | (1 << 5) | (1 << 6) | (1 << 7)) update stack pointer to allocate more space, we need to take the
red-zone into account. */
# define STATE_SAVE_OFFSET (8 * 7 + 8)
/* Save SSE, AVX, AVX512, mask, bound and APX registers. Bound and APX
registers are mutually exclusive. */
# define STATE_SAVE_MASK \
((1 << X86_XSTATE_SSE_ID) \
| (1 << X86_XSTATE_AVX_ID) \
| (1 << X86_XSTATE_BNDREGS_ID) \
| (1 << X86_XSTATE_K_ID) \
| (1 << X86_XSTATE_ZMM_H_ID) \
| (1 << X86_XSTATE_ZMM_ID) \
| (1 << X86_XSTATE_APX_F_ID))
#else
/* Offset for fxsave/xsave area used by _dl_tlsdesc_dynamic. Since i386
doesn't have red-zone, use 0 here. */
# define STATE_SAVE_OFFSET 0
/* Save SSE, AVX, AXV512, mask and bound registers. */
# define STATE_SAVE_MASK \
((1 << X86_XSTATE_SSE_ID) \
| (1 << X86_XSTATE_AVX_ID) \
| (1 << X86_XSTATE_BNDREGS_ID) \
| (1 << X86_XSTATE_K_ID) \
| (1 << X86_XSTATE_ZMM_H_ID))
#endif
/* Constants for bits in __x86_string_control: */ /* Constants for bits in __x86_string_control: */