975bd51a88
Provides replacement VDSO with sigreturn trampolines (__kernel_sigreturn, __kernel_rt_sigreturn) and syscall stubs (clock_gettime, clock_gettime64, clock_getres, gettimeofday). Both LE and BE blobs are committed and selected at compile time via TARGET_BIG_ENDIAN. The BE variant requires an sh4eb-unknown-linux-gnu toolchain; sh4-unknown-linux-gnu does not support -mb. CFI register numbers follow GCC's SH_DEBUGGER_REGNO: PR=17, GBR=18, MACH=20, MACL=21, FPUL=23, FPSCR=24, FR0-15=25-40. Signed-off-by: Matt Turner <mattst88@gmail.com> Signed-off-by: Helge Deller <deller@gmx.de>
46 lines
1.5 KiB
C
46 lines
1.5 KiB
C
/*
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* Offsets into target signal frames for sh4 vdso.
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*
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* From linux-user/sh4/signal.c:
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*
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* struct target_sigcontext {
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* target_ulong oldmask; // 0
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* target_ulong sc_gregs[16]; // 4
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* target_ulong sc_pc; // 68
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* target_ulong sc_pr; // 72
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* target_ulong sc_sr; // 76
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* target_ulong sc_gbr; // 80
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* target_ulong sc_mach; // 84
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* target_ulong sc_macl; // 88
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* target_ulong sc_fpregs[16]; // 92
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* target_ulong sc_xfpregs[16]; // 156
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* unsigned int sc_fpscr; // 220
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* unsigned int sc_fpul; // 224
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* unsigned int sc_ownedfp; // 228
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* }; // sizeof = 232
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*
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* struct sigframe { sigcontext sc; ... }
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* struct rt_sigframe { siginfo info[128]; ucontext uc; }
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* ucontext = { flags[4], link[4], stack[12], sigcontext mcontext; ... }
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* => mcontext at rt_sigframe + 128 + 20 = rt_sigframe + 148
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*/
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/* Offset of sigcontext within sigframe (CFA base for sigreturn). */
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#define SIGFRAME_SC_OFFSET 0
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/* Offset of tuc_mcontext within rt_sigframe (CFA base for rt_sigreturn). */
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#define RT_SIGFRAME_SC_OFFSET 148
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/* Offsets within struct sigcontext. */
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#define SC_GREGS 4
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#define SC_PC 68
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#define SC_PR 72
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#define SC_SR 76
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#define SC_GBR 80
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#define SC_MACH 84
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#define SC_MACL 88
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#define SC_FPREGS 92
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#define SC_XFPREGS 156
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#define SC_FPSCR 220
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#define SC_FPUL 224
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