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+/*
+ * ARM AArch64 specific signal definitions for bsd-user
+ *
+ * Copyright (c) 2015 Stacey D. Son <sson at FreeBSD>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+#include "qemu/osdep.h"
+
+#include "qemu.h"
+
+/*
+ * Compare to sendsig() in sys/arm64/arm64/machdep.c
+ * Assumes that target stack frame memory is locked.
+ */
+abi_long set_sigtramp_args(CPUARMState *regs, int sig,
+ struct target_sigframe *frame,
+ abi_ulong frame_addr,
+ struct target_sigaction *ka)
+{
+ /*
+ * Arguments to signal handler:
+ * x0 = signal number
+ * x1 = siginfo pointer
+ * x2 = ucontext pointer
+ * pc/elr = signal handler pointer
+ * sp = sigframe struct pointer
+ * lr = sigtramp at base of user stack
+ */
+
+ regs->xregs[0] = sig;
+ regs->xregs[1] = frame_addr +
+ offsetof(struct target_sigframe, sf_si);
+ regs->xregs[2] = frame_addr +
+ offsetof(struct target_sigframe, sf_uc);
+
+ regs->pc = ka->_sa_handler;
+ regs->xregs[TARGET_REG_SP] = frame_addr;
+ regs->xregs[TARGET_REG_LR] = TARGET_PS_STRINGS - TARGET_SZSIGCODE;
+
+ return 0;
+}
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+/*
+ * ARM AArch64 specific signal definitions for bsd-user
+ *
+ * Copyright (c) 2015 Stacey D. Son <sson at FreeBSD>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef TARGET_ARCH_SIGNAL_H
+#define TARGET_ARCH_SIGNAL_H
+
+#include "cpu.h"
+
+#define TARGET_REG_X0 0
+#define TARGET_REG_X30 30
+#define TARGET_REG_X31 31
+#define TARGET_REG_LR TARGET_REG_X30
+#define TARGET_REG_SP TARGET_REG_X31
+
+#define TARGET_INSN_SIZE 4 /* arm64 instruction size */
+
+/* Size of the signal trampolin code. See _sigtramp(). */
+#define TARGET_SZSIGCODE ((abi_ulong)(9 * TARGET_INSN_SIZE))
+
+/* compare to sys/arm64/include/_limits.h */
+#define TARGET_MINSIGSTKSZ (1024 * 4) /* min sig stack size */
+#define TARGET_SIGSTKSZ (TARGET_MINSIGSTKSZ + 32768) /* recommended size */
+
+/* struct __mcontext in sys/arm64/include/ucontext.h */
+
+struct target_gpregs {
+ uint64_t gp_x[30];
+ uint64_t gp_lr;
+ uint64_t gp_sp;
+ uint64_t gp_elr;
+ uint32_t gp_spsr;
+ uint32_t gp_pad;
+};
+
+struct target_fpregs {
+ __uint128_t fp_q[32];
+ uint32_t fp_sr;
+ uint32_t fp_cr;
+ uint32_t fp_flags;
+ uint32_t fp_pad;
+};
+
+struct target__mcontext {
+ struct target_gpregs mc_gpregs;
+ struct target_fpregs mc_fpregs;
+ uint32_t mc_flags;
+#define TARGET_MC_FP_VALID 0x1
+ uint32_t mc_pad;
+ uint64_t mc_spare[8];
+};
+
+typedef struct target__mcontext target_mcontext_t;
+
+#define TARGET_MCONTEXT_SIZE 880
+#define TARGET_UCONTEXT_SIZE 960
+
+#include "target_os_ucontext.h"
+
+struct target_sigframe {
+ target_siginfo_t sf_si; /* saved siginfo */
+ target_ucontext_t sf_uc; /* saved ucontext */
+};
+
+#endif /* TARGET_ARCH_SIGNAL_H */
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+/*
+ * ARM AArch64 sigcode for bsd-user
+ *
+ * Copyright (c) 2015 Stacey D. Son <sson at FreeBSD>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef TARGET_ARCH_SIGTRAMP_H
+#define TARGET_ARCH_SIGTRAMP_H
+
+/* Compare to ENTRY(sigcode) in arm64/arm64/locore.S */
+static inline abi_long setup_sigtramp(abi_ulong offset, unsigned sigf_uc,
+ unsigned sys_sigreturn)
+{
+ int i;
+ uint32_t sys_exit = TARGET_FREEBSD_NR_exit;
+
+ uint32_t sigtramp_code[] = {
+ /* 1 */ 0x910003e0, /* mov x0, sp */
+ /* 2 */ 0x91000000 + (sigf_uc << 10), /* add x0, x0, #SIGF_UC */
+ /* 3 */ 0xd2800000 + (sys_sigreturn << 5) + 0x8, /* mov x8, #SYS_sigreturn */
+ /* 4 */ 0xd4000001, /* svc #0 */
+ /* 5 */ 0xd2800028 + (sys_exit << 5) + 0x8, /* mov x8, #SYS_exit */
+ /* 6 */ 0xd4000001, /* svc #0 */
+ /* 7 */ 0x17fffffc, /* b -4 */
+ /* 8 */ sys_sigreturn,
+ /* 9 */ sys_exit
+ };
+
+ for (i = 0; i < 9; i++) {
+ tswap32s(&sigtramp_code[i]);
+ }
+
+ return memcpy_to_target(offset, sigtramp_code, TARGET_SZSIGCODE);
+}
+#endif /* TARGET_ARCH_SIGTRAMP_H */