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authorRichard Henderson <richard.henderson@linaro.org>2021-09-17 10:39:15 -0700
committerRichard Henderson <richard.henderson@linaro.org>2021-11-02 07:00:45 -0400
commitcf5f42fd07fa7ca4cfcf940093ef2506f990d1db (patch)
treee5390912b823a4fa51c6413ea7fdf4bb1ff46b73 /accel
parenta30bfaa7bd1f721a5b936fd1b4bf009eb9c2a6f4 (diff)
linux-user/host/aarch64: Populate host_signal.h
Split host_signal_pc and host_signal_write out of user-exec.c. Drop the *BSD code, to be re-created under bsd-user/ later. Reviewed-by: Warner Losh <imp@bsdimp.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'accel')
-rw-r--r--accel/tcg/user-exec.c94
1 files changed, 1 insertions, 93 deletions
diff --git a/accel/tcg/user-exec.c b/accel/tcg/user-exec.c
index fabc8855a9..5cdbfab35b 100644
--- a/accel/tcg/user-exec.c
+++ b/accel/tcg/user-exec.c
@@ -253,99 +253,7 @@ void *probe_access(CPUArchState *env, target_ulong addr, int size,
return size ? g2h(env_cpu(env), addr) : NULL;
}
-#if defined(__aarch64__)
-
-#if defined(__NetBSD__)
-
-#include <ucontext.h>
-#include <sys/siginfo.h>
-
-int cpu_signal_handler(int host_signum, void *pinfo, void *puc)
-{
- ucontext_t *uc = puc;
- siginfo_t *si = pinfo;
- unsigned long pc;
- int is_write;
- uint32_t esr;
-
- pc = uc->uc_mcontext.__gregs[_REG_PC];
- esr = si->si_trap;
-
- /*
- * siginfo_t::si_trap is the ESR value, for data aborts ESR.EC
- * is 0b10010x: then bit 6 is the WnR bit
- */
- is_write = extract32(esr, 27, 5) == 0x12 && extract32(esr, 6, 1) == 1;
- return handle_cpu_signal(pc, si, is_write, &uc->uc_sigmask);
-}
-
-#else
-
-#ifndef ESR_MAGIC
-/* Pre-3.16 kernel headers don't have these, so provide fallback definitions */
-#define ESR_MAGIC 0x45535201
-struct esr_context {
- struct _aarch64_ctx head;
- uint64_t esr;
-};
-#endif
-
-static inline struct _aarch64_ctx *first_ctx(ucontext_t *uc)
-{
- return (struct _aarch64_ctx *)&uc->uc_mcontext.__reserved;
-}
-
-static inline struct _aarch64_ctx *next_ctx(struct _aarch64_ctx *hdr)
-{
- return (struct _aarch64_ctx *)((char *)hdr + hdr->size);
-}
-
-int cpu_signal_handler(int host_signum, void *pinfo, void *puc)
-{
- siginfo_t *info = pinfo;
- ucontext_t *uc = puc;
- uintptr_t pc = uc->uc_mcontext.pc;
- bool is_write;
- struct _aarch64_ctx *hdr;
- struct esr_context const *esrctx = NULL;
-
- /* Find the esr_context, which has the WnR bit in it */
- for (hdr = first_ctx(uc); hdr->magic; hdr = next_ctx(hdr)) {
- if (hdr->magic == ESR_MAGIC) {
- esrctx = (struct esr_context const *)hdr;
- break;
- }
- }
-
- if (esrctx) {
- /* For data aborts ESR.EC is 0b10010x: then bit 6 is the WnR bit */
- uint64_t esr = esrctx->esr;
- is_write = extract32(esr, 27, 5) == 0x12 && extract32(esr, 6, 1) == 1;
- } else {
- /*
- * Fall back to parsing instructions; will only be needed
- * for really ancient (pre-3.16) kernels.
- */
- uint32_t insn = *(uint32_t *)pc;
-
- is_write = ((insn & 0xbfff0000) == 0x0c000000 /* C3.3.1 */
- || (insn & 0xbfe00000) == 0x0c800000 /* C3.3.2 */
- || (insn & 0xbfdf0000) == 0x0d000000 /* C3.3.3 */
- || (insn & 0xbfc00000) == 0x0d800000 /* C3.3.4 */
- || (insn & 0x3f400000) == 0x08000000 /* C3.3.6 */
- || (insn & 0x3bc00000) == 0x39000000 /* C3.3.13 */
- || (insn & 0x3fc00000) == 0x3d800000 /* ... 128bit */
- /* Ignore bits 10, 11 & 21, controlling indexing. */
- || (insn & 0x3bc00000) == 0x38000000 /* C3.3.8-12 */
- || (insn & 0x3fe00000) == 0x3c800000 /* ... 128bit */
- /* Ignore bits 23 & 24, controlling indexing. */
- || (insn & 0x3a400000) == 0x28000000); /* C3.3.7,14-16 */
- }
- return handle_cpu_signal(pc, info, is_write, &uc->uc_sigmask);
-}
-#endif
-
-#elif defined(__s390__)
+#if defined(__s390__)
int cpu_signal_handler(int host_signum, void *pinfo,
void *puc)