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From: Warner Losh <imp@bsdimp.com>
To: qemu-devel@nongnu.org
Cc: "Stacey Son" <sson@FreeBSD.org>,
	qemu-trivial@nongnu.org, "Michael Tokarev" <mjt@tls.msk.ru>,
	"Richard Henderson" <richard.henderson@linaro.org>,
	"Philippe Mathieu-Daude" <f4bug@amsat.org>,
	"Laurent Vivier" <laurent@vivier.eu>,
	"Mikaël Urankar" <mikael.urankar@gmail.com>,
	"Kyle Evans" <kevans@FreeBSD.org>, "Warner Losh" <imp@bsdimp.com>
Subject: [PATCH v4 18/36] bsd-user/arm/target_arch_cpu.h: Implement trivial EXCP exceptions
Date: Thu,  4 Nov 2021 21:18:59 -0600	[thread overview]
Message-ID: <20211105031917.87837-19-imp@bsdimp.com> (raw)
In-Reply-To: <20211105031917.87837-1-imp@bsdimp.com>

Implement EXCP_UDEF, EXCP_DEBUG, EXCP_INTERRUPT, EXCP_ATOMIC and
EXCP_YIELD. The first two generate a signal to the emulated
binary. EXCP_ATOMIC handles atomic operations. The remainder are fancy
nops.

Signed-off-by: Stacey Son <sson@FreeBSD.org>
Signed-off-by: Mikaël Urankar <mikael.urankar@gmail.com>
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/target_arch_cpu.h | 33 +++++++++++++++++++++++++++++++++
 1 file changed, 33 insertions(+)

diff --git a/bsd-user/arm/target_arch_cpu.h b/bsd-user/arm/target_arch_cpu.h
index 2484bdc2f7..9f9b380b13 100644
--- a/bsd-user/arm/target_arch_cpu.h
+++ b/bsd-user/arm/target_arch_cpu.h
@@ -48,6 +48,39 @@ static inline void target_cpu_loop(CPUARMState *env)
         cpu_exec_end(cs);
         process_queued_cpu_work(cs);
         switch (trapnr) {
+        case EXCP_UDEF:
+            {
+                /* See arm/arm/undefined.c undefinedinstruction(); */
+                info.si_addr = env->regs[15];
+
+                /* illegal instruction */
+                info.si_signo = TARGET_SIGILL;
+                info.si_errno = 0;
+                info.si_code = TARGET_ILL_ILLOPC;
+                queue_signal(env, info.si_signo, &info);
+
+                /* TODO: What about instruction emulation? */
+            }
+            break;
+        case EXCP_INTERRUPT:
+            /* just indicate that signals should be handled asap */
+            break;
+        case EXCP_DEBUG:
+            {
+
+                info.si_signo = TARGET_SIGTRAP;
+                info.si_errno = 0;
+                info.si_code = TARGET_TRAP_BRKPT;
+                info.si_addr = env->exception.vaddress;
+                queue_signal(env, info.si_signo, &info);
+            }
+            break;
+        case EXCP_ATOMIC:
+            cpu_exec_step_atomic(cs);
+            break;
+        case EXCP_YIELD:
+            /* nothing to do here for user-mode, just resume guest code */
+            break;
         default:
             fprintf(stderr, "qemu: unhandled CPU exception 0x%x - aborting\n",
                     trapnr);
-- 
2.33.0



  parent reply	other threads:[~2021-11-05  3:47 UTC|newest]

Thread overview: 55+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-11-05  3:18 [PATCH v4 00/36] bsd-user: arm (32-bit) support Warner Losh
2021-11-05  3:18 ` [PATCH v4 01/36] bsd-user/mips*: Remove Warner Losh
2021-11-05 15:52   ` Richard Henderson
2021-11-05 15:53     ` Kyle Evans
2021-11-05 16:01     ` Warner Losh
2021-11-05  3:18 ` [PATCH v4 02/36] bsd-user/freebsd: Create common target_os_ucontext.h file Warner Losh
2021-11-05 16:01   ` Richard Henderson
2021-11-05  3:18 ` [PATCH v4 03/36] bsd-user: create a per-arch signal.c file Warner Losh
2021-11-05 16:05   ` Richard Henderson
2021-11-05  3:18 ` [PATCH v4 04/36] bsd-user/i386/target_arch_signal.h: Remove target_sigcontext Warner Losh
2021-11-05  3:18 ` [PATCH v4 05/36] bsd-user/i386/target_arch_signal.h: use new target_os_ucontext.h Warner Losh
2021-11-05  3:18 ` [PATCH v4 06/36] bsd-user/i386/target_arch_signal.h: Update mcontext_t to match FreeBSD Warner Losh
2021-11-05 16:15   ` Richard Henderson
2021-11-05  3:18 ` [PATCH v4 07/36] bsd-user/i386: Move the inlines into signal.c Warner Losh
2021-11-05 16:21   ` Richard Henderson
2021-11-05 16:45     ` Warner Losh
2021-11-05 16:55       ` Warner Losh
2021-11-05  3:18 ` [PATCH v4 08/36] bsd-user/x86_64/target_arch_signal.h: Remove target_sigcontext Warner Losh
2021-11-05  3:18 ` [PATCH v4 09/36] bsd-user/x86_64/target_arch_signal.h: use new target_os_ucontext.h Warner Losh
2021-11-05  3:18 ` [PATCH v4 10/36] bsd-user/x86_64/target_arch_signal.h: Fill in mcontext_t Warner Losh
2021-11-05 16:23   ` Richard Henderson
2021-11-05  3:18 ` [PATCH v4 11/36] bsd-user/x86_64: Move functions into signal.c Warner Losh
2021-11-05 16:25   ` Richard Henderson
2021-11-05 17:08     ` Warner Losh
2021-11-05  3:18 ` [PATCH v4 12/36] bsd-user/arm/target_arch_sysarch.h: Use consistent include guards Warner Losh
2021-11-05  3:18 ` [PATCH v4 13/36] bsd-user/arm/target_syscall.h: Add copyright and update name Warner Losh
2021-11-05  3:18 ` [PATCH v4 14/36] bsd-user/arm/target_arch_cpu.c: Target specific TLS routines Warner Losh
2021-11-05  3:18 ` [PATCH v4 15/36] bsd-user/arm/target_arch_cpu.h: CPU Loop definitions Warner Losh
2021-11-05  3:18 ` [PATCH v4 16/36] bsd-user/arm/target_arch_cpu.h: Implement target_cpu_clone_regs Warner Losh
2021-11-05  3:18 ` [PATCH v4 17/36] bsd-user/arm/target_arch_cpu.h: Dummy target_cpu_loop implementation Warner Losh
2021-11-05  3:18 ` Warner Losh [this message]
2021-11-05  3:19 ` [PATCH v4 19/36] bsd-user/arm/target_arch_cpu.h: Implement data abort exceptions Warner Losh
2021-11-05  3:19 ` [PATCH v4 20/36] bsd-user/arm/target_arch_cpu.h: Implement system call dispatch Warner Losh
2021-11-05  3:19 ` [PATCH v4 21/36] bsd-user/arm/target_arch_reg.h: Implement core dump register copying Warner Losh
2021-11-05  3:19 ` [PATCH v4 22/36] bsd-user/arm/target_arch_vmparam.h: Parameters for arm address space Warner Losh
2021-11-05  3:19 ` [PATCH v4 23/36] bsd-user/arm/target_arch_sigtramp.h: Signal Trampoline for arm Warner Losh
2021-11-05  3:19 ` [PATCH v4 24/36] bsd-user/arm/target_arch_thread.h: Routines to create and switch to a thread Warner Losh
2021-11-05  3:19 ` [PATCH v4 25/36] bsd-user/arm/target_arch_elf.h: arm defines for ELF Warner Losh
2021-11-05  3:19 ` [PATCH v4 26/36] bsd-user/arm/target_arch_elf.h: arm get hwcap Warner Losh
2021-11-05  3:19 ` [PATCH v4 27/36] bsd-user/arm/target_arch_elf.h: arm get_hwcap2 impl Warner Losh
2021-11-05  3:19 ` [PATCH v4 28/36] bsd-user/arm/target_arch_signal.h: arm specific signal registers and stack Warner Losh
2021-11-05  3:19 ` [PATCH v4 29/36] bsd-user/arm/target_arch_signal.h: arm machine context and trapframe for signals Warner Losh
2021-11-05 16:31   ` Richard Henderson
2021-11-05  3:19 ` [PATCH v4 30/36] bsd-user/arm/target_arch_signal.h: Define size of *context_t Warner Losh
2021-11-05 16:31   ` Richard Henderson
2021-11-05  3:19 ` [PATCH v4 31/36] bsd-user/arm/target_arch_signal.c: arm set_sigtramp_args Warner Losh
2021-11-05  3:19 ` [PATCH v4 32/36] bsd-user/arm/target_arch_signal.c: arm get_mcontext Warner Losh
2021-11-05 16:36   ` Richard Henderson
2021-11-05  3:19 ` [PATCH v4 33/36] bsd-user/arm/target_arch_signal.c: arm set_mcontext Warner Losh
2021-11-05 16:44   ` Richard Henderson
2021-11-05 17:41     ` Warner Losh
2021-11-05  3:19 ` [PATCH v4 34/36] bsd-user/arm/target_arch_signal.c: arm get_ucontext_sigreturn Warner Losh
2021-11-05  3:19 ` [PATCH v4 35/36] bsd-user/freebsd/target_os_ucontext.h: Require TARGET_*CONTEXT_SIZE Warner Losh
2021-11-05 16:45   ` Richard Henderson
2021-11-05  3:19 ` [PATCH v4 36/36] bsd-user: add arm target build Warner Losh

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