linux-user: Fix XER access in ppc version of elf_core_copy_regs

env->xer doesn't hold some bits of XER, like OV and CA. To write the
complete register in the core dump we should read XER value with
cpu_read_xer.

Reported-by: Lucas Mateus Castro (alqotel) <lucas.araujo@eldorado.org.br>
Fixes: da91a00f191f ("target-ppc: Split out SO, OV, CA fields from XER")
Signed-off-by: Matheus Ferst <matheus.ferst@eldorado.org.br>
Message-Id: <20211014223234.127012-4-matheus.ferst@eldorado.org.br>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

diff --git a/linux-user/elfload.c b/linux-user/elfload.c
index 2404d482bafa0f2951043c041b31ede48da4fe99..eb32f3e2cb6d88d945f04e666a5dc1f7a0f88187 100644 (file)
--- a/linux-user/elfload.c
+++ b/linux-user/elfload.c
@@ -901,7 +901,7 @@ static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUPPCState *en
     (*regs)[33] = tswapreg(env->msr);
     (*regs)[35] = tswapreg(env->ctr);
     (*regs)[36] = tswapreg(env->lr);
-    (*regs)[37] = tswapreg(env->xer);
+    (*regs)[37] = tswapreg(cpu_read_xer(env));
 
     for (i = 0; i < ARRAY_SIZE(env->crf); i++) {
         ccr |= env->crf[i] << (32 - ((i + 1) * 4));

diff --git a/target/ppc/cpu.c b/target/ppc/cpu.c
index 7ad9bd604408a4af639516ee0b1dbcb54ff8629d..f933d9f2bd844b27f3ce6703b447c456b0958072 100644 (file)
--- a/target/ppc/cpu.c
+++ b/target/ppc/cpu.c
@@ -27,7 +27,7 @@
 #include "helper_regs.h"
 #include "sysemu/tcg.h"
 
-target_ulong cpu_read_xer(CPUPPCState *env)
+target_ulong cpu_read_xer(const CPUPPCState *env)
 {
     if (is_isa300(env)) {
         return env->xer | (env->so << XER_SO) |

diff --git a/target/ppc/cpu.h b/target/ppc/cpu.h
index baa4e7c34d3039d11d1f4c9f4da2552d4cd0b6b0..c6fc0043a9760992a5625c141986fb0bdd937019 100644 (file)
--- a/target/ppc/cpu.h
+++ b/target/ppc/cpu.h
@@ -2412,7 +2412,7 @@ enum {
 /*****************************************************************************/
 
 #define is_isa300(ctx) (!!(ctx->insns_flags2 & PPC2_ISA300))
-target_ulong cpu_read_xer(CPUPPCState *env);
+target_ulong cpu_read_xer(const CPUPPCState *env);
 void cpu_write_xer(CPUPPCState *env, target_ulong xer);
 
 /*