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linux-user: Introduce host_sigcontext

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Do not directly access ucontext_t as the third signal parameter.
This is preparation for a sparc64 fix.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2022-02-08 09:40:00 +03:00
parent c8c89a6a30
commit 9940799bde
12 changed files with 80 additions and 47 deletions
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13
linux-user/include/host/aarch64/host-signal.h
View file

@ -11,6 +11,9 @@
#ifndef AARCH64_HOST_SIGNAL_H
#define AARCH64_HOST_SIGNAL_H
/* The third argument to a SA_SIGINFO handler is ucontext_t. */
typedef ucontext_t host_sigcontext;
/* Pre-3.16 kernel headers don't have these, so provide fallback definitions */
#ifndef ESR_MAGIC
#define ESR_MAGIC 0x45535201
@ -20,7 +23,7 @@ struct esr_context {
};
#endif
static inline struct _aarch64_ctx *first_ctx(ucontext_t *uc)
static inline struct _aarch64_ctx *first_ctx(host_sigcontext *uc)
{
return (struct _aarch64_ctx *)&uc->uc_mcontext.__reserved;
}
@ -30,22 +33,22 @@ static inline struct _aarch64_ctx *next_ctx(struct _aarch64_ctx *hdr)
return (struct _aarch64_ctx *)((char *)hdr + hdr->size);
}
static inline uintptr_t host_signal_pc(ucontext_t *uc)
static inline uintptr_t host_signal_pc(host_sigcontext *uc)
{
return uc->uc_mcontext.pc;
}
static inline void host_signal_set_pc(ucontext_t *uc, uintptr_t pc)
static inline void host_signal_set_pc(host_sigcontext *uc, uintptr_t pc)
{
uc->uc_mcontext.pc = pc;
}
static inline void *host_signal_mask(ucontext_t *uc)
static inline void *host_signal_mask(host_sigcontext *uc)
{
return &uc->uc_sigmask;
}
static inline bool host_signal_write(siginfo_t *info, ucontext_t *uc)
static inline bool host_signal_write(siginfo_t *info, host_sigcontext *uc)
{
struct _aarch64_ctx *hdr;
uint32_t insn;