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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, Kyle Evans <kevans@freebsd.org>,
	Michael Tokarev <mjt@tls.msk.ru>,
	Laurent Vivier <laurent@vivier.eu>, Warner Losh <imp@bsdimp.com>
Subject: [PATCH 12/24] bsd-user/arm/target_arch_sigtramp.h: Signal Trampoline for arm
Date: Tue, 19 Oct 2021 10:44:35 -0600	[thread overview]
Message-ID: <20211019164447.16359-13-imp@bsdimp.com> (raw)
In-Reply-To: <20211019164447.16359-1-imp@bsdimp.com>

Copy of the signal trampoline code for arm, as well as setup_sigtramp to
write it to the stack.

Signed-off-by: Stacey Son <sson@FreeBSD.org>
Signed-off-by: Warner Losh <imp@bsdimp.com>
---
 bsd-user/arm/target_arch_sigtramp.h | 52 +++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 bsd-user/arm/target_arch_sigtramp.h

diff --git a/bsd-user/arm/target_arch_sigtramp.h b/bsd-user/arm/target_arch_sigtramp.h
new file mode 100644
index 0000000000..ed53d336ed
--- /dev/null
+++ b/bsd-user/arm/target_arch_sigtramp.h
@@ -0,0 +1,52 @@
+/*
+ *  arm sysarch() system call emulation
+ *
+ *  Copyright (c) 2013 Stacey D. 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_SIGTRAMP_H_
+#define _TARGET_ARCH_SIGTRAMP_H_
+
+/* Compare to arm/arm/locore.S ENTRY_NP(sigcode) */
+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;
+    /*
+     * The code has to load r7 manually rather than using
+     * "ldr r7, =SYS_return to make sure the size of the
+     * code is correct.
+     */
+    uint32_t sigtramp_code[] = {
+    /* 1 */ 0xE1A0000D,                  /* mov r0, sp */
+    /* 2 */ 0xE2800000 + sigf_uc,        /* add r0, r0, #SIGF_UC */
+    /* 3 */ 0xE59F700C,                  /* ldr r7, [pc, #12] */
+    /* 4 */ 0xEF000000 + sys_sigreturn,  /* swi (SYS_sigreturn) */
+    /* 5 */ 0xE59F7008,                  /* ldr r7, [pc, #8] */
+    /* 6 */ 0xEF000000 + sys_exit,       /* swi (SYS_exit)*/
+    /* 7 */ 0xEAFFFFFA,                  /* b . -16 */
+    /* 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_ */
-- 
2.32.0



  parent reply	other threads:[~2021-10-19 17:31 UTC|newest]

Thread overview: 95+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-19 16:44 [PATCH 00/24] bsd-user: arm (32-bit) support Warner Losh
2021-10-19 16:44 ` [PATCH 01/24] bsd-user/arm/target_arch_sysarch.h: Use consistent include guards Warner Losh
2021-10-23  7:29   ` Kyle Evans
2021-10-28 15:08   ` Richard Henderson
2021-10-19 16:44 ` [PATCH 02/24] bsd-user/arm/target_syscall.h: Add copyright and update name Warner Losh
2021-10-23  7:30   ` Kyle Evans
2021-10-28 15:08   ` Richard Henderson
2021-10-19 16:44 ` [PATCH 03/24] bsd-user/arm/target_arch_cpu.c: Target specific TLS routines Warner Losh
2021-10-23  7:30   ` Kyle Evans
2021-10-28 15:08   ` Richard Henderson
2021-10-19 16:44 ` [PATCH 04/24] bsd-user/arm/target_arch_cpu.h: CPU Loop definitions Warner Losh
2021-10-23  7:31   ` Kyle Evans
2021-10-28 15:14   ` Richard Henderson
2021-10-28 17:36     ` Warner Losh
2021-10-19 16:44 ` [PATCH 05/24] bsd-user/arm/target_arch_cpu.h: Implement target_cpu_clone_regs Warner Losh
2021-10-23  7:31   ` Kyle Evans
2021-10-28 15:15   ` Richard Henderson
2021-10-19 16:44 ` [PATCH 06/24] bsd-user/arm/target_arch_cpu.h: Dummy target_cpu_loop implementation Warner Losh
2021-10-23  7:32   ` Kyle Evans
2021-10-28 15:15   ` Richard Henderson
2021-10-19 16:44 ` [PATCH 07/24] bsd-user/arm/target_arch_cpu.h: Implment trivial EXCP exceptions Warner Losh
2021-10-26  5:52   ` Kyle Evans
2021-10-28 15:19   ` Richard Henderson
2021-10-19 16:44 ` [PATCH 08/24] bsd-user/arm/target_arch_cpu.h: Implement data abort exceptions Warner Losh
2021-10-26  5:47   ` Kyle Evans
2021-10-28 15:29   ` Richard Henderson
2021-10-28 16:56     ` Warner Losh
2021-10-19 16:44 ` [PATCH 09/24] bsd-user/arm/target_arch_cpu.h: Implement system call dispatch Warner Losh
2021-10-23  7:33   ` Kyle Evans
2021-10-23 15:17     ` Warner Losh
2021-10-28 15:35   ` Richard Henderson
2021-10-28 17:56     ` Warner Losh
2021-10-19 16:44 ` [PATCH 10/24] bsd-user/arm/target_arch_reg.h: Implement core dump register copying Warner Losh
2021-10-26  5:48   ` Kyle Evans
2021-10-28 15:36   ` Richard Henderson
2021-10-19 16:44 ` [PATCH 11/24] bsd-user/arm/target_arch_vmparam.h: Parameters for arm address space Warner Losh
2021-10-26  5:52   ` Kyle Evans
2021-10-28 15:37   ` Richard Henderson
2021-10-19 16:44 ` Warner Losh [this message]
2021-10-26  5:51   ` [PATCH 12/24] bsd-user/arm/target_arch_sigtramp.h: Signal Trampoline for arm Kyle Evans
2021-10-28 15:42   ` Richard Henderson
2021-10-28 19:35     ` Warner Losh
2021-10-19 16:44 ` [PATCH 13/24] bsd-user/arm/target_arch_thread.h: Routines to create and switch to a thread Warner Losh
2021-10-26  6:01   ` Kyle Evans
2021-10-26  6:11     ` Kyle Evans
2021-10-27 15:35       ` Warner Losh
2021-10-27 15:40         ` Kyle Evans
2021-10-28 15:57   ` Richard Henderson
2021-10-28 19:45     ` Warner Losh
2021-10-29 16:06       ` Richard Henderson
2021-10-19 16:44 ` [PATCH 14/24] bsd-user/arm/target_arch_elf.h: arm defines for ELF Warner Losh
2021-10-26  6:07   ` Kyle Evans
2021-10-28 16:02   ` Richard Henderson
2021-10-19 16:44 ` [PATCH 15/24] bsd-user/arm/target_arch_elf.h: arm get hwcap Warner Losh
2021-10-26  6:02   ` Kyle Evans
2021-10-28 16:06   ` Richard Henderson
2021-10-19 16:44 ` [PATCH 16/24] bsd-user/arm/target_arch_elf.h: arm get_hwcap2 impl Warner Losh
2021-10-26  6:02   ` Kyle Evans
2021-10-28 16:08   ` Richard Henderson
2021-10-19 16:44 ` [PATCH 17/24] bsd-user/arm/target_arch_signal.h: arm specific signal registers and stack Warner Losh
2021-10-26  6:03   ` Kyle Evans
2021-10-28 16:18   ` Richard Henderson
2021-10-28 16:48     ` Warner Losh
2021-10-19 16:44 ` [PATCH 18/24] bsd-user/arm/target_arch_signal.h: arm machine context for signals Warner Losh
2021-10-26  6:03   ` Kyle Evans
2021-10-28 17:04   ` Richard Henderson
2021-10-28 17:18   ` Richard Henderson
2021-10-28 20:16     ` Warner Losh
2021-10-19 16:44 ` [PATCH 19/24] bsd-user/arm/target_arch_signal.h: arm user context and trapframe " Warner Losh
2021-10-26  6:07   ` Kyle Evans
2021-10-27 15:48     ` Warner Losh
2021-10-28 17:22   ` Richard Henderson
2021-10-30  2:44     ` Warner Losh
2021-10-19 16:44 ` [PATCH 20/24] bsd-user/arm/target_arch_signal.h: arm set_sigtramp_args Warner Losh
2021-10-26  6:10   ` Kyle Evans
2021-10-28 17:25   ` Richard Henderson
2021-10-28 17:35     ` Kyle Evans
2021-10-28 22:22       ` Warner Losh
2021-10-28 22:41     ` Warner Losh
2021-10-30  2:47       ` Warner Losh
2021-10-19 16:44 ` [PATCH 21/24] bsd-user/arm/target_arch_signal.h: arm get_mcontext Warner Losh
2021-10-26  6:08   ` Kyle Evans
2021-10-28 17:27   ` Richard Henderson
2021-10-19 16:44 ` [PATCH 22/24] bsd-user/arm/target_arch_signal.h: arm set_mcontext Warner Losh
2021-10-26  6:12   ` Kyle Evans
2021-10-28 17:53   ` Richard Henderson
2021-10-29  0:07     ` Warner Losh
2021-10-29  4:34       ` Warner Losh
2021-10-28 17:57   ` Richard Henderson
2021-10-19 16:44 ` [PATCH 23/24] bsd-user/arm/target_arch_signal.h: arm get_ucontext_sigreturn Warner Losh
2021-10-26  6:12   ` Kyle Evans
2021-10-28 17:59   ` Richard Henderson
2021-10-19 16:44 ` [PATCH 24/24] bsd-user: add arm target build Warner Losh
2021-10-26  6:21   ` Kyle Evans
2021-10-28 18:02     ` Richard Henderson

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