From dadfc6d5df1006b52c1c0c8ae3af84ac3be36b31 Mon Sep 17 00:00:00 2001 From: Stacey Son Date: Mon, 8 Jul 2024 00:41:27 +0530 Subject: bsd-user:Add set_mcontext function for ARM AArch64 The function copies register values from the provided target_mcontext_t structure to the CPUARMState registers. Note:FP is unfinished upstream but will be a separate commit coming soon. Signed-off-by: Stacey Son Signed-off-by: Ajeet Singh Reviewed-by: Richard Henderson Message-Id: <20240707191128.10509-8-itachis@FreeBSD.org> Signed-off-by: Warner Losh --- bsd-user/aarch64/signal.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) (limited to 'bsd-user/aarch64') diff --git a/bsd-user/aarch64/signal.c b/bsd-user/aarch64/signal.c index 43c886e603..13faac8ce6 100644 --- a/bsd-user/aarch64/signal.c +++ b/bsd-user/aarch64/signal.c @@ -95,3 +95,25 @@ abi_long setup_sigframe_arch(CPUARMState *env, abi_ulong frame_addr, return 0; } +/* + * Compare to set_mcontext() in arm64/arm64/machdep.c + * Assumes that the memory is locked if frame points to user memory. + */ +abi_long set_mcontext(CPUARMState *regs, target_mcontext_t *mcp, int srflag) +{ + int err = 0, i; + const uint64_t *gr = mcp->mc_gpregs.gp_x; + + for (i = 0; i < 30; i++) { + regs->xregs[i] = tswap64(gr[i]); + } + + regs->xregs[TARGET_REG_SP] = tswap64(mcp->mc_gpregs.gp_sp); + regs->xregs[TARGET_REG_LR] = tswap64(mcp->mc_gpregs.gp_lr); + regs->pc = mcp->mc_gpregs.gp_elr; + pstate_write(regs, mcp->mc_gpregs.gp_spsr); + + /* XXX FP? */ + + return err; +} -- cgit v1.2.3