Signed-off-by: Song Gao <gaos...@loongson.cn>
Reviewed-by: Richard Henderson <richard.hender...@linaro.org>
Message-Id: <20231101030816.2353416-6-gaos...@loongson.cn>
---
linux-user/loongarch64/signal.c | 107 ++++++++++++++++++++++++++------
1 file changed, 87 insertions(+), 20 deletions(-)
diff --git a/linux-user/loongarch64/signal.c b/linux-user/loongarch64/signal.c
index 9336f40ffe..9c9b446a91 100644
--- a/linux-user/loongarch64/signal.c
+++ b/linux-user/loongarch64/signal.c
@@ -41,6 +41,14 @@ struct target_fpu_context {
QEMU_BUILD_BUG_ON(offsetof(struct target_fpu_context, regs)
!= offsetof_fpucontext_fr);
+#define LSX_CTX_MAGIC 0x53580001
+#define LSX_CTX_ALIGN 16
+struct target_lsx_context {
+ abi_ulong regs[2 * 32];
+ abi_ulong fcc;
+ abi_uint fcsr;
+} QEMU_ALIGNED(LSX_CTX_ALIGN);
+
#define CONTEXT_INFO_ALIGN 16
struct target_sctx_info {
abi_uint magic;
@@ -81,9 +89,10 @@ struct ctx_layout {
};
struct extctx_layout {
- unsigned int size;
+ unsigned long size;
unsigned int flags;
struct ctx_layout fpu;
+ struct ctx_layout lsx;
struct ctx_layout end;
};
@@ -105,7 +114,8 @@ static abi_ptr extframe_alloc(struct extctx_layout *extctx,
return sp;
}
-static abi_ptr setup_extcontext(struct extctx_layout *extctx, abi_ptr sp)
+static abi_ptr setup_extcontext(CPULoongArchState *env,
+ struct extctx_layout *extctx, abi_ptr sp)
{
memset(extctx, 0, sizeof(struct extctx_layout));
@@ -114,8 +124,15 @@ static abi_ptr setup_extcontext(struct extctx_layout
*extctx, abi_ptr sp)
/* For qemu, there is no lazy fp context switch, so fp always present. */
extctx->flags = SC_USED_FP;
- sp = extframe_alloc(extctx, &extctx->fpu,
+
+ if (FIELD_EX64(env->CSR_EUEN, CSR_EUEN, SXE)) {
+ sp = extframe_alloc(extctx, &extctx->lsx,
+ sizeof(struct target_lsx_context), LSX_CTX_ALIGN, sp);
+
+ } else {
+ sp = extframe_alloc(extctx, &extctx->fpu,
sizeof(struct target_fpu_context), FPU_CTX_ALIGN, sp);
+ }
return sp;
}
@@ -125,7 +142,6 @@ static void setup_sigframe(CPULoongArchState *env,
struct extctx_layout *extctx)
{
struct target_sctx_info *info;
- struct target_fpu_context *fpu_ctx;
int i;
__put_user(extctx->flags, &sc->sc_flags);
@@ -136,18 +152,39 @@ static void setup_sigframe(CPULoongArchState *env,
}
/*
- * Set fpu context
+ * Set extension context
*/
- info = extctx->fpu.haddr;
- __put_user(FPU_CTX_MAGIC, &info->magic);
- __put_user(extctx->fpu.size, &info->size);
- fpu_ctx = (struct target_fpu_context *)(info + 1);
- for (i = 0; i < 32; ++i) {
- __put_user(env->fpr[i].vreg.D(0), &fpu_ctx->regs[i]);
+ if (FIELD_EX64(env->CSR_EUEN, CSR_EUEN, SXE)) {
+ struct target_lsx_context *lsx_ctx;
+ info = extctx->lsx.haddr;
+
+ __put_user(LSX_CTX_MAGIC, &info->magic);
+ __put_user(extctx->lsx.size, &info->size);
+
+ lsx_ctx = (struct target_lsx_context *)(info + 1);
+
+ for (i = 0; i < 32; ++i) {
+ __put_user(env->fpr[i].vreg.UD(0), &lsx_ctx->regs[2 * i]);
+ __put_user(env->fpr[i].vreg.UD(1), &lsx_ctx->regs[2 * i + 1]);
+ }
+ __put_user(read_fcc(env), &lsx_ctx->fcc);
+ __put_user(env->fcsr0, &lsx_ctx->fcsr);
+ } else {
+ struct target_fpu_context *fpu_ctx;
+ info = extctx->fpu.haddr;
+
+ __put_user(FPU_CTX_MAGIC, &info->magic);
+ __put_user(extctx->fpu.size, &info->size);
+
+ fpu_ctx = (struct target_fpu_context *)(info + 1);
+
+ for (i = 0; i < 32; ++i) {
+ __put_user(env->fpr[i].vreg.UD(0), &fpu_ctx->regs[i]);
+ }
+ __put_user(read_fcc(env), &fpu_ctx->fcc);
+ __put_user(env->fcsr0, &fpu_ctx->fcsr);
}
- __put_user(read_fcc(env), &fpu_ctx->fcc);
- __put_user(env->fcsr0, &fpu_ctx->fcsr);
/*
* Set end context
@@ -184,6 +221,15 @@ static bool parse_extcontext(struct extctx_layout *extctx,
abi_ptr frame)
extctx->fpu.size = size;
extctx->size += size;
break;
+ case LSX_CTX_MAGIC:
+ if (size < (sizeof(struct target_sctx_info) +
+ sizeof(struct target_lsx_context))) {
+ return false;
+ }
+ extctx->lsx.gaddr = frame;
+ extctx->lsx.size = size;
+ extctx->size += size;
+ break;
default:
return false;
}
@@ -197,19 +243,31 @@ static void restore_sigframe(CPULoongArchState *env,
struct extctx_layout *extctx)
{
int i;
+ abi_ulong fcc;
__get_user(env->pc, &sc->sc_pc);
for (i = 1; i < 32; ++i) {
__get_user(env->gpr[i], &sc->sc_regs[i]);
}
- if (extctx->fpu.haddr) {
+ if (extctx->lsx.haddr) {
+ struct target_lsx_context *lsx_ctx =
+ extctx->lsx.haddr + sizeof(struct target_sctx_info);
+
+ for (i = 0; i < 32; ++i) {
+ __get_user(env->fpr[i].vreg.UD(0), &lsx_ctx->regs[2 * i]);
+ __get_user(env->fpr[i].vreg.UD(1), &lsx_ctx->regs[2 * i + 1]);
+ }
+ __get_user(fcc, &lsx_ctx->fcc);
+ write_fcc(env, fcc);
+ __get_user(env->fcsr0, &lsx_ctx->fcsr);
+ restore_fp_status(env);
+ } else if (extctx->fpu.haddr) {
struct target_fpu_context *fpu_ctx =
extctx->fpu.haddr + sizeof(struct target_sctx_info);
- abi_ulong fcc;
for (i = 0; i < 32; ++i) {
- __get_user(env->fpr[i].vreg.D(0), &fpu_ctx->regs[i]);
+ __get_user(env->fpr[i].vreg.UD(0), &fpu_ctx->regs[i]);
}
__get_user(fcc, &fpu_ctx->fcc);
write_fcc(env, fcc);
@@ -229,7 +287,7 @@ static abi_ptr get_sigframe(struct target_sigaction *ka,
sp = target_sigsp(get_sp_from_cpustate(env), ka);
sp = ROUND_DOWN(sp, 16);
- sp = setup_extcontext(extctx, sp);
+ sp = setup_extcontext(env, extctx, sp);
sp -= sizeof(struct target_rt_sigframe);
assert(QEMU_IS_ALIGNED(sp, 16));
@@ -255,8 +313,14 @@ void setup_rt_frame(int sig, struct target_sigaction *ka,
force_sigsegv(sig);
return;
}
- extctx.fpu.haddr = (void *)frame + (extctx.fpu.gaddr - frame_addr);
- extctx.end.haddr = (void *)frame + (extctx.end.gaddr - frame_addr);
+
+ if (FIELD_EX64(env->CSR_EUEN, CSR_EUEN, SXE)) {
+ extctx.lsx.haddr = (void *)frame + (extctx.lsx.gaddr - frame_addr);
+ extctx.end.haddr = (void *)frame + (extctx.end.gaddr - frame_addr);
+ } else {
+ extctx.fpu.haddr = (void *)frame + (extctx.fpu.gaddr - frame_addr);
+ extctx.end.haddr = (void *)frame + (extctx.end.gaddr - frame_addr);
+ }
tswap_siginfo(&frame->rs_info, info);
@@ -299,7 +363,10 @@ long do_rt_sigreturn(CPULoongArchState *env)
if (!frame) {
goto badframe;
}
- if (extctx.fpu.gaddr) {
+
+ if (extctx.lsx.gaddr) {
+ extctx.lsx.haddr = (void *)frame + (extctx.lsx.gaddr - frame_addr);
+ } else if (extctx.fpu.gaddr) {
extctx.fpu.haddr = (void *)frame + (extctx.fpu.gaddr - frame_addr);
}
--
2.25.1
