From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Cc: "Edgar E . Iglesias" <edgar.iglesias@gmail.com>,
alex.bennee@linaro.org, laurent@vivier.eu,
"Philippe Mathieu-Daudé" <f4bug@amsat.org>
Subject: [PATCH v2 12/23] linux-user/microblaze: Implement setup_sigtramp
Date: Fri, 18 Jun 2021 12:29:40 -0700 [thread overview]
Message-ID: <20210618192951.125651-13-richard.henderson@linaro.org> (raw)
In-Reply-To: <20210618192951.125651-1-richard.henderson@linaro.org>
Create and record the rt signal trampoline.
Cc: Edgar E. Iglesias <edgar.iglesias@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
linux-user/microblaze/target_signal.h | 2 ++
linux-user/microblaze/signal.c | 24 +++++++++++++++++-------
2 files changed, 19 insertions(+), 7 deletions(-)
diff --git a/linux-user/microblaze/target_signal.h b/linux-user/microblaze/target_signal.h
index 1c326296de..e8b510f6b1 100644
--- a/linux-user/microblaze/target_signal.h
+++ b/linux-user/microblaze/target_signal.h
@@ -21,4 +21,6 @@ typedef struct target_sigaltstack {
#include "../generic/signal.h"
+#define TARGET_ARCH_HAS_SIGTRAMP_PAGE 1
+
#endif /* MICROBLAZE_TARGET_SIGNAL_H */
diff --git a/linux-user/microblaze/signal.c b/linux-user/microblaze/signal.c
index 4c483bd8c6..aa27454931 100644
--- a/linux-user/microblaze/signal.c
+++ b/linux-user/microblaze/signal.c
@@ -160,17 +160,11 @@ void setup_rt_frame(int sig, struct target_sigaction *ka,
/* Kernel does not use SA_RESTORER. */
- /* addi r12, r0, __NR_sigreturn */
- __put_user(0x31800000U | TARGET_NR_rt_sigreturn, frame->tramp + 0);
- /* brki r14, 0x8 */
- __put_user(0xb9cc0008U, frame->tramp + 1);
-
/*
* Return from sighandler will jump to the tramp.
* Negative 8 offset because return is rtsd r15, 8
*/
- env->regs[15] =
- frame_addr + offsetof(struct target_rt_sigframe, tramp) - 8;
+ env->regs[15] = default_rt_sigreturn - 8;
/* Set up registers for signal handler */
env->regs[1] = frame_addr;
@@ -219,3 +213,19 @@ long do_rt_sigreturn(CPUMBState *env)
force_sig(TARGET_SIGSEGV);
return -TARGET_QEMU_ESIGRETURN;
}
+
+void setup_sigtramp(abi_ulong sigtramp_page)
+{
+ uint32_t *tramp = lock_user(VERIFY_WRITE, sigtramp_page, 8, 0);
+ assert(tramp != NULL);
+
+ /*
+ * addi r12, r0, __NR_rt_sigreturn
+ * brki r14, 0x8
+ */
+ __put_user(0x31800000U | TARGET_NR_rt_sigreturn, tramp);
+ __put_user(0xb9cc0008U, tramp + 1);
+
+ default_rt_sigreturn = sigtramp_page;
+ unlock_user(tramp, sigtramp_page, 8);
+}
--
2.25.1
next prev parent reply other threads:[~2021-06-18 19:42 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-18 19:29 [PATCH v2 00/23] linux-user: Move signal trampolines to new page Richard Henderson
2021-06-18 19:29 ` [PATCH v2 01/23] linux-user: Add infrastructure for a signal trampoline page Richard Henderson
2021-06-19 9:33 ` Philippe Mathieu-Daudé
2021-06-29 13:30 ` Peter Maydell
2021-06-18 19:29 ` [PATCH v2 02/23] linux-user/aarch64: Implement setup_sigtramp Richard Henderson
2021-06-29 13:36 ` Peter Maydell
2021-07-01 19:27 ` Richard Henderson
2021-06-18 19:29 ` [PATCH v2 03/23] linux-user/arm: Split out v2_frame Richard Henderson
2021-06-29 13:53 ` Peter Maydell
2021-06-29 14:30 ` Richard Henderson
2021-06-18 19:29 ` [PATCH v2 04/23] linux-user/arm: Force v2 frames for fdpic Richard Henderson
2021-06-29 13:54 ` Peter Maydell
2021-06-18 19:29 ` [PATCH v2 05/23] linux-user/arm: Implement setup_sigtramp Richard Henderson
2021-06-29 14:09 ` Peter Maydell
2021-06-29 18:32 ` Richard Henderson
2021-06-18 19:29 ` [PATCH v2 06/23] linux-user/alpha: " Richard Henderson
2021-06-18 19:29 ` [PATCH v2 07/23] linux-user/cris: " Richard Henderson
2021-06-19 9:33 ` Philippe Mathieu-Daudé
2021-06-19 12:55 ` Richard Henderson
2021-06-19 14:17 ` Philippe Mathieu-Daudé
2021-06-18 19:29 ` [PATCH v2 08/23] linux-user/hexagon: " Richard Henderson
2021-06-19 9:31 ` Philippe Mathieu-Daudé
2021-06-18 19:29 ` [PATCH v2 09/23] linux-user/hppa: Document non-use of setup_sigtramp Richard Henderson
2021-06-18 19:29 ` [PATCH v2 10/23] linux-user/i386: Implement setup_sigtramp Richard Henderson
2021-06-29 14:40 ` Peter Maydell
2021-06-29 18:30 ` Richard Henderson
2021-06-18 19:29 ` [PATCH v2 11/23] linux-user/m68k: " Richard Henderson
2021-06-18 19:29 ` Richard Henderson [this message]
2021-06-18 19:29 ` [PATCH v2 13/23] linux-user/mips: Tidy install_sigtramp Richard Henderson
2021-06-19 9:29 ` Philippe Mathieu-Daudé
2021-06-18 19:29 ` [PATCH v2 14/23] linux-user/mips: Implement setup_sigtramp Richard Henderson
2021-06-18 19:29 ` [PATCH v2 15/23] linux-user/nios2: Document non-use of setup_sigtramp Richard Henderson
2021-06-19 9:35 ` Philippe Mathieu-Daudé
2021-06-18 19:29 ` [PATCH v2 16/23] linux-user/openrisc: Implement setup_sigtramp Richard Henderson
2021-06-18 19:29 ` [PATCH v2 17/23] linux-user/ppc: " Richard Henderson
2021-06-29 14:52 ` Peter Maydell
2021-06-18 19:29 ` [PATCH v2 18/23] linux-user/riscv: " Richard Henderson
2021-06-18 19:29 ` [PATCH v2 19/23] linux-user/s390x: " Richard Henderson
2021-06-18 19:29 ` [PATCH v2 20/23] linux-user/sh4: " Richard Henderson
2021-06-18 19:29 ` [PATCH v2 21/23] linux-user/sparc: " Richard Henderson
2021-07-02 9:05 ` Philippe Mathieu-Daudé
2021-06-18 19:29 ` [PATCH v2 22/23] linux-user/xtensa: " Richard Henderson
2021-06-18 19:29 ` [PATCH v2 23/23] linux-user: Remove default for TARGET_ARCH_HAS_SIGTRAMP_PAGE Richard Henderson
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