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| author | Richard Henderson <richard.henderson@linaro.org> | 2021-09-29 09:05:44 -0400 |
|---|---|---|
| committer | Laurent Vivier <laurent@vivier.eu> | 2021-10-01 12:03:48 +0200 |
| commit | 9ce3ad4452539723d9204dbfc137f57124eb8e36 (patch) | |
| tree | 55b6fc787e6004aaa2553dbd9af818ac9dce9318 | |
| parent | f32d3b67938a42e320016fd15f5c34afa0fb105a (diff) | |
| download | qemu-9ce3ad4452539723d9204dbfc137f57124eb8e36.zip qemu-9ce3ad4452539723d9204dbfc137f57124eb8e36.tar.gz qemu-9ce3ad4452539723d9204dbfc137f57124eb8e36.tar.bz2 | |
linux-user/openrisc: Implement setup_sigtramp
Create and record the rt signal trampoline.
Reviewed-by: Stafford Horne <shorne@gmail.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20210929130553.121567-18-richard.henderson@linaro.org>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
| -rw-r--r-- | linux-user/openrisc/signal.c | 22 | ||||
| -rw-r--r-- | linux-user/openrisc/target_signal.h | 2 |
2 files changed, 16 insertions, 8 deletions
diff --git a/linux-user/openrisc/signal.c b/linux-user/openrisc/signal.c index ca2532b..be8b687 100644 --- a/linux-user/openrisc/signal.c +++ b/linux-user/openrisc/signal.c @@ -38,7 +38,6 @@ typedef struct target_ucontext { typedef struct target_rt_sigframe { struct target_siginfo info; target_ucontext uc; - uint32_t retcode[4]; /* trampoline code */ } target_rt_sigframe; static void restore_sigcontext(CPUOpenRISCState *env, target_sigcontext *sc) @@ -116,14 +115,8 @@ void setup_rt_frame(int sig, struct target_sigaction *ka, __put_user(set->sig[i], &frame->uc.tuc_sigmask.sig[i]); } - /* This is l.ori r11,r0,__NR_sigreturn; l.sys 1; l.nop; l.nop */ - __put_user(0xa9600000 | TARGET_NR_rt_sigreturn, frame->retcode + 0); - __put_user(0x20000001, frame->retcode + 1); - __put_user(0x15000000, frame->retcode + 2); - __put_user(0x15000000, frame->retcode + 3); - /* Set up registers for signal handler */ - cpu_set_gpr(env, 9, frame_addr + offsetof(target_rt_sigframe, retcode)); + cpu_set_gpr(env, 9, default_rt_sigreturn); cpu_set_gpr(env, 3, sig); cpu_set_gpr(env, 4, frame_addr + offsetof(target_rt_sigframe, info)); cpu_set_gpr(env, 5, frame_addr + offsetof(target_rt_sigframe, uc)); @@ -169,3 +162,16 @@ long do_rt_sigreturn(CPUOpenRISCState *env) force_sig(TARGET_SIGSEGV); return 0; } + +void setup_sigtramp(abi_ulong sigtramp_page) +{ + uint32_t *tramp = lock_user(VERIFY_WRITE, sigtramp_page, 8, 0); + assert(tramp != NULL); + + /* This is l.ori r11,r0,__NR_sigreturn; l.sys 1 */ + __put_user(0xa9600000 | TARGET_NR_rt_sigreturn, tramp + 0); + __put_user(0x20000001, tramp + 1); + + default_rt_sigreturn = sigtramp_page; + unlock_user(tramp, sigtramp_page, 8); +} diff --git a/linux-user/openrisc/target_signal.h b/linux-user/openrisc/target_signal.h index 8283eaf..077ec3d 100644 --- a/linux-user/openrisc/target_signal.h +++ b/linux-user/openrisc/target_signal.h @@ -26,4 +26,6 @@ typedef struct target_sigaltstack { #include "../generic/signal.h" +#define TARGET_ARCH_HAS_SIGTRAMP_PAGE 1 + #endif /* OPENRISC_TARGET_SIGNAL_H */ |