bsd-user/arm/target_arch_reg.h: Implement core dump register copying

Implement the register copying routines to extract registers from the
cpu for core dump generation.

Signed-off-by: Stacey Son <sson@FreeBSD.org>
Signed-off-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Kyle Evans <kevans@FreeBSD.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

1 files changed, 60 insertions, 0 deletions

diff --git a/bsd-user/arm/target_arch_reg.h b/bsd-user/arm/target_arch_reg.h
new file mode 100644
index 0000000..ef5ed51
--- /dev/null
+++ b/bsd-user/arm/target_arch_reg.h
@@ -0,0 +1,60 @@
+/*
+ *  FreeBSD arm register structures
+ *
+ *  Copyright (c) 2015 Stacey Son
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program 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 General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef _TARGET_ARCH_REG_H_
+#define _TARGET_ARCH_REG_H_
+
+/* See sys/arm/include/reg.h */
+typedef struct target_reg {
+    uint32_t        r[13];
+    uint32_t        r_sp;
+    uint32_t        r_lr;
+    uint32_t        r_pc;
+    uint32_t        r_cpsr;
+} target_reg_t;
+
+typedef struct target_fp_reg {
+    uint32_t        fp_exponent;
+    uint32_t        fp_mantissa_hi;
+    u_int32_t       fp_mantissa_lo;
+} target_fp_reg_t;
+
+typedef struct target_fpreg {
+    uint32_t        fpr_fpsr;
+    target_fp_reg_t fpr[8];
+} target_fpreg_t;
+
+#define tswapreg(ptr)   tswapal(ptr)
+
+static inline void target_copy_regs(target_reg_t *regs, const CPUARMState *env)
+{
+    int i;
+
+    for (i = 0; i < 13; i++) {
+        regs->r[i] = tswapreg(env->regs[i + 1]);
+    }
+    regs->r_sp = tswapreg(env->regs[13]);
+    regs->r_lr = tswapreg(env->regs[14]);
+    regs->r_pc = tswapreg(env->regs[15]);
+    regs->r_cpsr = tswapreg(cpsr_read((CPUARMState *)env));
+}
+
+#undef tswapreg
+
+#endif /* !_TARGET_ARCH_REG_H_ */