From c6cda6a44a8adaeb30bd6dc185f021809625433d Mon Sep 17 00:00:00 2001 From: Warner Losh Date: Fri, 12 Nov 2021 21:55:59 -0700 Subject: linux-user: Add host_signal_set_pc to set pc in mcontext MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Add a new function host_signal_set_pc to set the next pc in an mcontext. The caller should ensure this is a valid PC for execution. Acked-by: Laurent Vivier Signed-off-by: Warner Losh Reviewed-by: Philippe Mathieu-Daudé Reviewed-by: Richard Henderson Message-Id: <20211113045603.60391-2-imp@bsdimp.com> Signed-off-by: Richard Henderson --- linux-user/host/aarch64/host-signal.h | 5 +++++ linux-user/host/alpha/host-signal.h | 5 +++++ linux-user/host/arm/host-signal.h | 5 +++++ linux-user/host/i386/host-signal.h | 5 +++++ linux-user/host/mips/host-signal.h | 5 +++++ linux-user/host/ppc/host-signal.h | 5 +++++ linux-user/host/riscv/host-signal.h | 5 +++++ linux-user/host/s390/host-signal.h | 5 +++++ linux-user/host/sparc/host-signal.h | 9 +++++++++ linux-user/host/x86_64/host-signal.h | 5 +++++ 10 files changed, 54 insertions(+) (limited to 'linux-user/host') diff --git a/linux-user/host/aarch64/host-signal.h b/linux-user/host/aarch64/host-signal.h index 0c0b083..9770b36 100644 --- a/linux-user/host/aarch64/host-signal.h +++ b/linux-user/host/aarch64/host-signal.h @@ -35,6 +35,11 @@ static inline uintptr_t host_signal_pc(ucontext_t *uc) return uc->uc_mcontext.pc; } +static inline void host_signal_set_pc(ucontext_t *uc, uintptr_t pc) +{ + uc->uc_mcontext.pc = pc; +} + static inline bool host_signal_write(siginfo_t *info, ucontext_t *uc) { struct _aarch64_ctx *hdr; diff --git a/linux-user/host/alpha/host-signal.h b/linux-user/host/alpha/host-signal.h index e080be4..f4c9429 100644 --- a/linux-user/host/alpha/host-signal.h +++ b/linux-user/host/alpha/host-signal.h @@ -16,6 +16,11 @@ static inline uintptr_t host_signal_pc(ucontext_t *uc) return uc->uc_mcontext.sc_pc; } +static inline void host_signal_set_pc(ucontext_t *uc, uintptr_t pc) +{ + uc->uc_mcontext.sc_pc = pc; +} + static inline bool host_signal_write(siginfo_t *info, ucontext_t *uc) { uint32_t *pc = (uint32_t *)host_signal_pc(uc); diff --git a/linux-user/host/arm/host-signal.h b/linux-user/host/arm/host-signal.h index efb165c..6c09577 100644 --- a/linux-user/host/arm/host-signal.h +++ b/linux-user/host/arm/host-signal.h @@ -16,6 +16,11 @@ static inline uintptr_t host_signal_pc(ucontext_t *uc) return uc->uc_mcontext.arm_pc; } +static inline void host_signal_set_pc(ucontext_t *uc, uintptr_t pc) +{ + uc->uc_mcontext.arm_pc = pc; +} + static inline bool host_signal_write(siginfo_t *info, ucontext_t *uc) { /* diff --git a/linux-user/host/i386/host-signal.h b/linux-user/host/i386/host-signal.h index 4c8eef9..abe1ece 100644 --- a/linux-user/host/i386/host-signal.h +++ b/linux-user/host/i386/host-signal.h @@ -16,6 +16,11 @@ static inline uintptr_t host_signal_pc(ucontext_t *uc) return uc->uc_mcontext.gregs[REG_EIP]; } +static inline void host_signal_set_pc(ucontext_t *uc, uintptr_t pc) +{ + uc->uc_mcontext.gregs[REG_EIP] = pc; +} + static inline bool host_signal_write(siginfo_t *info, ucontext_t *uc) { return uc->uc_mcontext.gregs[REG_TRAPNO] == 0xe diff --git a/linux-user/host/mips/host-signal.h b/linux-user/host/mips/host-signal.h index ef341f7..c666ed8 100644 --- a/linux-user/host/mips/host-signal.h +++ b/linux-user/host/mips/host-signal.h @@ -16,6 +16,11 @@ static inline uintptr_t host_signal_pc(ucontext_t *uc) return uc->uc_mcontext.pc; } +static inline void host_signal_set_pc(ucontext_t *uc, uintptr_t pc) +{ + uc->uc_mcontext.pc = pc; +} + #if defined(__misp16) || defined(__mips_micromips) #error "Unsupported encoding" #endif diff --git a/linux-user/host/ppc/host-signal.h b/linux-user/host/ppc/host-signal.h index a491c41..1d8e658 100644 --- a/linux-user/host/ppc/host-signal.h +++ b/linux-user/host/ppc/host-signal.h @@ -16,6 +16,11 @@ static inline uintptr_t host_signal_pc(ucontext_t *uc) return uc->uc_mcontext.regs->nip; } +static inline void host_signal_set_pc(ucontext_t *uc, uintptr_t pc) +{ + uc->uc_mcontext.regs->nip = pc; +} + static inline bool host_signal_write(siginfo_t *info, ucontext_t *uc) { return uc->uc_mcontext.regs->trap != 0x400 diff --git a/linux-user/host/riscv/host-signal.h b/linux-user/host/riscv/host-signal.h index 3b168cb..a4f170e 100644 --- a/linux-user/host/riscv/host-signal.h +++ b/linux-user/host/riscv/host-signal.h @@ -16,6 +16,11 @@ static inline uintptr_t host_signal_pc(ucontext_t *uc) return uc->uc_mcontext.__gregs[REG_PC]; } +static inline void host_signal_set_pc(ucontext_t *uc, uintptr_t pc) +{ + uc->uc_mcontext.__gregs[REG_PC] = pc; +} + static inline bool host_signal_write(siginfo_t *info, ucontext_t *uc) { /* diff --git a/linux-user/host/s390/host-signal.h b/linux-user/host/s390/host-signal.h index 26990e4..a524f2a 100644 --- a/linux-user/host/s390/host-signal.h +++ b/linux-user/host/s390/host-signal.h @@ -16,6 +16,11 @@ static inline uintptr_t host_signal_pc(ucontext_t *uc) return uc->uc_mcontext.psw.addr; } +static inline void host_signal_set_pc(ucontext_t *uc, uintptr_t pc) +{ + uc->uc_mcontext.psw.addr = pc; +} + static inline bool host_signal_write(siginfo_t *info, ucontext_t *uc) { uint16_t *pinsn = (uint16_t *)host_signal_pc(uc); diff --git a/linux-user/host/sparc/host-signal.h b/linux-user/host/sparc/host-signal.h index 5e71d33..7342936 100644 --- a/linux-user/host/sparc/host-signal.h +++ b/linux-user/host/sparc/host-signal.h @@ -20,6 +20,15 @@ static inline uintptr_t host_signal_pc(ucontext_t *uc) #endif } +static inline void host_signal_set_pc(ucontext_t *uc, uintptr_t pc) +{ +#ifdef __arch64__ + uc->uc_mcontext.mc_gregs[MC_PC] = pc; +#else + uc->uc_mcontext.gregs[REG_PC] = pc; +#endif +} + static inline bool host_signal_write(siginfo_t *info, ucontext_t *uc) { uint32_t insn = *(uint32_t *)host_signal_pc(uc); diff --git a/linux-user/host/x86_64/host-signal.h b/linux-user/host/x86_64/host-signal.h index 883d2fc..c71d597 100644 --- a/linux-user/host/x86_64/host-signal.h +++ b/linux-user/host/x86_64/host-signal.h @@ -15,6 +15,11 @@ static inline uintptr_t host_signal_pc(ucontext_t *uc) return uc->uc_mcontext.gregs[REG_RIP]; } +static inline void host_signal_set_pc(ucontext_t *uc, uintptr_t pc) +{ + uc->uc_mcontext.gregs[REG_RIP] = pc; +} + static inline bool host_signal_write(siginfo_t *info, ucontext_t *uc) { return uc->uc_mcontext.gregs[REG_TRAPNO] == 0xe -- cgit v1.1