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Differential D38302 Diff 116344 sys/x86/linux/linux_x86_sigframe.h

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sys/x86/linux/linux_x86_sigframe.h

Show First 20 Lines • Show All 132 Lines • ▼ Show 20 Linesstruct l_fpstate {
u_int16_t cwd; u_int16_t cwd;
u_int16_t swd; u_int16_t swd;
u_int16_t twd; u_int16_t twd;
u_int16_t fop; u_int16_t fop;
u_int64_t rip; u_int64_t rip;
u_int64_t rdp; u_int64_t rdp;
u_int32_t mxcsr; u_int32_t mxcsr;
u_int32_t mxcsr_mask; u_int32_t mxcsr_mask;
u_int32_t st_space[32]; u_int8_t st[8][16];
u_int32_t xmm_space[64]; u_int8_t xmm[16][16];
u_int32_t reserved2[24]; u_int32_t reserved2[24];
}; } __aligned(16);
struct l_sigcontext { struct l_sigcontext {
l_ulong sc_r8; l_ulong sc_r8;
l_ulong sc_r9; l_ulong sc_r9;
l_ulong sc_r10; l_ulong sc_r10;
l_ulong sc_r11; l_ulong sc_r11;
l_ulong sc_r12; l_ulong sc_r12;
l_ulong sc_r13; l_ulong sc_r13;
l_ulong sc_r14; l_ulong sc_r14;
kibUnsubmitted
Not Done
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So what would we do when Linux starts using that space?

In fact I believe that you do not need to save any of these fields. When restroring context, set owned to _MC_FPOWNED_FPU, mc_fpformat to _MC_FPFMT_XMM, and flags to _MX_HASFPXSTATE,

kib: So what would we do when Linux starts using that space? In fact I believe that you do not need…
l_ulong sc_r15; l_ulong sc_r15;
l_ulong sc_rdi; l_ulong sc_rdi;
l_ulong sc_rsi; l_ulong sc_rsi;
l_ulong sc_rbp; l_ulong sc_rbp;
l_ulong sc_rbx; l_ulong sc_rbx;
l_ulong sc_rdx; l_ulong sc_rdx;
l_ulong sc_rax; l_ulong sc_rax;
l_ulong sc_rcx; l_ulong sc_rcx;
Show All 22 Lines
/* /*
* We make the stack look like Linux expects it when calling a signal * We make the stack look like Linux expects it when calling a signal
* handler, but use the BSD way of calling the handler and sigreturn(). * handler, but use the BSD way of calling the handler and sigreturn().
*/ */
struct l_rt_sigframe { struct l_rt_sigframe {
struct l_ucontext sf_uc; struct l_ucontext sf_uc;
struct l_siginfo sf_si; struct l_siginfo sf_si;
struct l_fpstate sf_fs;
}; };
#endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */ #endif /* __i386__ || (__amd64__ && COMPAT_LINUX32) */
#endif /* !_X86_LINUX_SIGFRAME_H_ */ #endif /* !_X86_LINUX_SIGFRAME_H_ */