linux-user/mips: Use target_ulong for target_elf_greg_t

Make use of the fact that target_elf_gregset_t is a proper structure.
The target_ulong type matches the abi_ulong/abi_ullong
selection within mips64/target_elf.h.

Drop ELF_NREG, target_elf_greg_t, and tswapreg.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

3 files changed, 22 insertions, 50 deletions

diff --git a/linux-user/mips/elfload.c b/linux-user/mips/elfload.c
index 6e88491..e0c50f5 100644
--- a/linux-user/mips/elfload.c
+++ b/linux-user/mips/elfload.c
@@ -124,47 +124,19 @@ const char *get_elf_base_platform(CPUState *cs)
 
 #undef MATCH_PLATFORM_INSN
 
-#ifdef TARGET_ABI_MIPSN32
-#define tswapreg(ptr)   tswap64(ptr)
-#else
-#define tswapreg(ptr)   tswapal(ptr)
-#endif
-
-/* See linux kernel: arch/mips/include/asm/reg.h.  */
-enum {
-#ifdef TARGET_MIPS64
-    TARGET_EF_R0 = 0,
-#else
-    TARGET_EF_R0 = 6,
-#endif
-    TARGET_EF_R26 = TARGET_EF_R0 + 26,
-    TARGET_EF_R27 = TARGET_EF_R0 + 27,
-    TARGET_EF_LO = TARGET_EF_R0 + 32,
-    TARGET_EF_HI = TARGET_EF_R0 + 33,
-    TARGET_EF_CP0_EPC = TARGET_EF_R0 + 34,
-    TARGET_EF_CP0_BADVADDR = TARGET_EF_R0 + 35,
-    TARGET_EF_CP0_STATUS = TARGET_EF_R0 + 36,
-    TARGET_EF_CP0_CAUSE = TARGET_EF_R0 + 37
-};
-
 /* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs.  */
 void elf_core_copy_regs(target_elf_gregset_t *r, const CPUMIPSState *env)
 {
-    int i;
-
-    for (i = 0; i <= TARGET_EF_R0; i++) {
-        r->regs[i] = 0;
-    }
-    for (i = 1; i < ARRAY_SIZE(env->active_tc.gpr); i++) {
-        r->regs[TARGET_EF_R0 + i] = tswapreg(env->active_tc.gpr[i]);
+    for (int i = 1; i < ARRAY_SIZE(env->active_tc.gpr); i++) {
+        r->pt.regs[i] = tswapl(env->active_tc.gpr[i]);
     }
 
-    r->regs[TARGET_EF_R26] = 0;
-    r->regs[TARGET_EF_R27] = 0;
-    r->regs[TARGET_EF_LO] = tswapreg(env->active_tc.LO[0]);
-    r->regs[TARGET_EF_HI] = tswapreg(env->active_tc.HI[0]);
-    r->regs[TARGET_EF_CP0_EPC] = tswapreg(env->active_tc.PC);
-    r->regs[TARGET_EF_CP0_BADVADDR] = tswapreg(env->CP0_BadVAddr);
-    r->regs[TARGET_EF_CP0_STATUS] = tswapreg(env->CP0_Status);
-    r->regs[TARGET_EF_CP0_CAUSE] = tswapreg(env->CP0_Cause);
+    r->pt.regs[26] = 0;
+    r->pt.regs[27] = 0;
+    r->pt.lo = tswapl(env->active_tc.LO[0]);
+    r->pt.hi = tswapl(env->active_tc.HI[0]);
+    r->pt.cp0_epc = tswapl(env->active_tc.PC);
+    r->pt.cp0_badvaddr = tswapl(env->CP0_BadVAddr);
+    r->pt.cp0_status = tswapl(env->CP0_Status);
+    r->pt.cp0_cause = tswapl(env->CP0_Cause);
 }
diff --git a/linux-user/mips/target_elf.h b/linux-user/mips/target_elf.h
index f767767..a4b7fad 100644
--- a/linux-user/mips/target_elf.h
+++ b/linux-user/mips/target_elf.h
@@ -8,16 +8,18 @@
 #ifndef MIPS_TARGET_ELF_H
 #define MIPS_TARGET_ELF_H
 
+#include "target_ptrace.h"
+
 #define HAVE_ELF_HWCAP          1
 #define HAVE_ELF_BASE_PLATFORM  1
 #define HAVE_ELF_CORE_DUMP      1
 
-typedef abi_ulong target_elf_greg_t;
-
 /* See linux kernel: arch/mips/include/asm/elf.h.  */
-#define ELF_NREG                45
 typedef struct target_elf_gregset_t {
-    target_elf_greg_t regs[ELF_NREG];
+    union {
+        abi_ulong reserved[45];
+        struct target_pt_regs pt;
+    };
 } target_elf_gregset_t;
 
 #endif
diff --git a/linux-user/mips64/target_elf.h b/linux-user/mips64/target_elf.h
index 046a165..67bc963 100644
--- a/linux-user/mips64/target_elf.h
+++ b/linux-user/mips64/target_elf.h
@@ -8,20 +8,18 @@
 #ifndef MIPS64_TARGET_ELF_H
 #define MIPS64_TARGET_ELF_H
 
+#include "target_ptrace.h"
+
 #define HAVE_ELF_HWCAP          1
 #define HAVE_ELF_BASE_PLATFORM  1
 #define HAVE_ELF_CORE_DUMP      1
 
-#ifdef TARGET_ABI_MIPSN32
-typedef abi_ullong target_elf_greg_t;
-#else
-typedef abi_ulong target_elf_greg_t;
-#endif
-
 /* See linux kernel: arch/mips/include/asm/elf.h.  */
-#define ELF_NREG                45
 typedef struct target_elf_gregset_t {
-    target_elf_greg_t regs[ELF_NREG];
+    union {
+        target_ulong reserved[45];
+        struct target_pt_regs pt;
+    };
 } target_elf_gregset_t;
 
 #endif