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[PULL 33/37] bsd-user/arm/signal.c: arm get_mcontext
From: |
Warner Losh |
Subject: |
[PULL 33/37] bsd-user/arm/signal.c: arm get_mcontext |
Date: |
Sat, 8 Jan 2022 00:37:33 -0700 |
Get the machine context from the CPU state.
Signed-off-by: Stacey Son <sson@FreeBSD.org>
Signed-off-by: Kyle Evans <kevans@FreeBSD.org>
Signed-off-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
---
bsd-user/arm/signal.c | 51 +++++++++++++++++++++++++++++++++++++++++++
1 file changed, 51 insertions(+)
diff --git a/bsd-user/arm/signal.c b/bsd-user/arm/signal.c
index 3c0db30a85e..93c9bfc0d37 100644
--- a/bsd-user/arm/signal.c
+++ b/bsd-user/arm/signal.c
@@ -58,3 +58,54 @@ abi_long set_sigtramp_args(CPUARMState *env, int sig,
return 0;
}
+
+/*
+ * Compare to arm/arm/machdep.c get_mcontext()
+ * Assumes that the memory is locked if mcp points to user memory.
+ */
+abi_long get_mcontext(CPUARMState *env, target_mcontext_t *mcp, int flags)
+{
+ int err = 0;
+ uint32_t *gr = mcp->__gregs;
+
+ if (mcp->mc_vfp_size != 0 && mcp->mc_vfp_size !=
sizeof(target_mcontext_vfp_t)) {
+ return -TARGET_EINVAL;
+ }
+
+ gr[TARGET_REG_CPSR] = tswap32(cpsr_read(env));
+ if (flags & TARGET_MC_GET_CLEAR_RET) {
+ gr[TARGET_REG_R0] = 0;
+ gr[TARGET_REG_CPSR] &= ~CPSR_C;
+ } else {
+ gr[TARGET_REG_R0] = tswap32(env->regs[0]);
+ }
+
+ gr[TARGET_REG_R1] = tswap32(env->regs[1]);
+ gr[TARGET_REG_R2] = tswap32(env->regs[2]);
+ gr[TARGET_REG_R3] = tswap32(env->regs[3]);
+ gr[TARGET_REG_R4] = tswap32(env->regs[4]);
+ gr[TARGET_REG_R5] = tswap32(env->regs[5]);
+ gr[TARGET_REG_R6] = tswap32(env->regs[6]);
+ gr[TARGET_REG_R7] = tswap32(env->regs[7]);
+ gr[TARGET_REG_R8] = tswap32(env->regs[8]);
+ gr[TARGET_REG_R9] = tswap32(env->regs[9]);
+ gr[TARGET_REG_R10] = tswap32(env->regs[10]);
+ gr[TARGET_REG_R11] = tswap32(env->regs[11]);
+ gr[TARGET_REG_R12] = tswap32(env->regs[12]);
+
+ gr[TARGET_REG_SP] = tswap32(env->regs[13]);
+ gr[TARGET_REG_LR] = tswap32(env->regs[14]);
+ gr[TARGET_REG_PC] = tswap32(env->regs[15]);
+
+ if (mcp->mc_vfp_size != 0 && mcp->mc_vfp_ptr != 0) {
+ /* see get_vfpcontext in sys/arm/arm/exec_machdep.c */
+ target_mcontext_vfp_t *vfp;
+ vfp = lock_user(VERIFY_WRITE, mcp->mc_vfp_ptr, sizeof(*vfp), 0);
+ for (int i = 0; i < 32; i++) {
+ vfp->mcv_reg[i] = tswap64(*aa32_vfp_dreg(env, i));
+ }
+ vfp->mcv_fpscr = tswap32(vfp_get_fpscr(env));
+ unlock_user(vfp, mcp->mc_vfp_ptr, sizeof(*vfp));
+ }
+ return err;
+}
--
2.33.1
- [PULL 21/37] bsd-user/arm/target_arch_cpu.h: Implement system call dispatch, (continued)
- [PULL 21/37] bsd-user/arm/target_arch_cpu.h: Implement system call dispatch, Warner Losh, 2022/01/08
- [PULL 23/37] bsd-user/arm/target_arch_vmparam.h: Parameters for arm address space, Warner Losh, 2022/01/08
- [PULL 17/37] bsd-user/arm/target_arch_cpu.h: Implement target_cpu_clone_regs, Warner Losh, 2022/01/08
- [PULL 22/37] bsd-user/arm/target_arch_reg.h: Implement core dump register copying, Warner Losh, 2022/01/08
- [PULL 10/37] bsd-user/x86_64/target_arch_signal.h: Fill in mcontext_t, Warner Losh, 2022/01/08
- [PULL 24/37] bsd-user/arm/target_arch_sigtramp.h: Signal Trampoline for arm, Warner Losh, 2022/01/08
- [PULL 31/37] bsd-user/arm/target_arch_signal.h: Define size of *context_t, Warner Losh, 2022/01/08
- [PULL 30/37] bsd-user/arm/target_arch_signal.h: arm machine context and trapframe for signals, Warner Losh, 2022/01/08
- [PULL 28/37] bsd-user/arm/target_arch_elf.h: arm get_hwcap2 impl, Warner Losh, 2022/01/08
- [PULL 29/37] bsd-user/arm/target_arch_signal.h: arm specific signal registers and stack, Warner Losh, 2022/01/08
- [PULL 33/37] bsd-user/arm/signal.c: arm get_mcontext,
Warner Losh <=
- [PULL 34/37] bsd-user/arm/signal.c: arm set_mcontext, Warner Losh, 2022/01/08
- [PULL 37/37] bsd-user: add arm target build, Warner Losh, 2022/01/08
- [PULL 32/37] bsd-user/arm/signal.c: arm set_sigtramp_args, Warner Losh, 2022/01/08
- [PULL 36/37] bsd-user/freebsd/target_os_ucontext.h: Require TARGET_*CONTEXT_SIZE, Warner Losh, 2022/01/08
- [PULL 03/37] bsd-user: create a per-arch signal.c file, Warner Losh, 2022/01/08
- Re: [PULL 00/37] Bsd user arm patches, Richard Henderson, 2022/01/08