load_elf: Remove unused address variables from callers

Several callers of load_elf() pass pointers for lowaddr and highaddr
parameters which are then not used for anything. This may stem from a
misunderstanding that load_elf need a value here but in fact it can
take NULL to ignore these values. Remove such unused variables and
pass NULL instead from callers that don't need these.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Acked-by: Max Filippov <jcmvbkbc@gmail.com>
Message-Id: <20200705174020.BDD0174633F@zero.eik.bme.hu>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>

16 files changed, 41 insertions, 57 deletions

diff --git a/hw/alpha/dp264.c b/hw/alpha/dp264.c
index f7751b1..4d24518 100644
--- a/hw/alpha/dp264.c
+++ b/hw/alpha/dp264.c
@@ -62,8 +62,8 @@ static void clipper_init(MachineState *machine)
     qemu_irq rtc_irq;
     long size, i;
     char *palcode_filename;
-    uint64_t palcode_entry, palcode_low, palcode_high;
-    uint64_t kernel_entry, kernel_low, kernel_high;
+    uint64_t palcode_entry;
+    uint64_t kernel_entry, kernel_low;
     unsigned int smp_cpus = machine->smp.cpus;
 
     /* Create up to 4 cpus.  */
@@ -113,7 +113,7 @@ static void clipper_init(MachineState *machine)
         exit(1);
     }
     size = load_elf(palcode_filename, NULL, cpu_alpha_superpage_to_phys,
-                    NULL, &palcode_entry, &palcode_low, &palcode_high, NULL,
+                    NULL, &palcode_entry, NULL, NULL, NULL,
                     0, EM_ALPHA, 0, 0);
     if (size < 0) {
         error_report("could not load palcode '%s'", palcode_filename);
@@ -132,7 +132,7 @@ static void clipper_init(MachineState *machine)
         uint64_t param_offset;
 
         size = load_elf(kernel_filename, NULL, cpu_alpha_superpage_to_phys,
-                        NULL, &kernel_entry, &kernel_low, &kernel_high, NULL,
+                        NULL, &kernel_entry, &kernel_low, NULL, NULL,
                         0, EM_ALPHA, 0, 0);
         if (size < 0) {
             error_report("could not load kernel '%s'", kernel_filename);
diff --git a/hw/arm/armv7m.c b/hw/arm/armv7m.c
index 0e5997d..8113b29 100644
--- a/hw/arm/armv7m.c
+++ b/hw/arm/armv7m.c
@@ -292,7 +292,6 @@ void armv7m_load_kernel(ARMCPU *cpu, const char *kernel_filename, int mem_size)
 {
     int image_size;
     uint64_t entry;
-    uint64_t lowaddr;
     int big_endian;
     AddressSpace *as;
     int asidx;
@@ -313,12 +312,11 @@ void armv7m_load_kernel(ARMCPU *cpu, const char *kernel_filename, int mem_size)
 
     if (kernel_filename) {
         image_size = load_elf_as(kernel_filename, NULL, NULL, NULL,
-                                 &entry, &lowaddr, NULL,
+                                 &entry, NULL, NULL,
                                  NULL, big_endian, EM_ARM, 1, 0, as);
         if (image_size < 0) {
             image_size = load_image_targphys_as(kernel_filename, 0,
                                                 mem_size, as);
-            lowaddr = 0;
         }
         if (image_size < 0) {
             error_report("Could not load kernel '%s'", kernel_filename);
diff --git a/hw/cris/boot.c b/hw/cris/boot.c
index b8947bc..aa8d275 100644
--- a/hw/cris/boot.c
+++ b/hw/cris/boot.c
@@ -67,7 +67,7 @@ static uint64_t translate_kernel_address(void *opaque, uint64_t addr)
 void cris_load_image(CRISCPU *cpu, struct cris_load_info *li)
 {
     CPUCRISState *env = &cpu->env;
-    uint64_t entry, high;
+    uint64_t entry;
     int kcmdline_len;
     int image_size;
 
@@ -76,7 +76,7 @@ void cris_load_image(CRISCPU *cpu, struct cris_load_info *li)
        devboard SDK.  */
     image_size = load_elf(li->image_filename, NULL,
                           translate_kernel_address, NULL,
-                          &entry, NULL, &high, NULL, 0, EM_CRIS, 0, 0);
+                          &entry, NULL, NULL, NULL, 0, EM_CRIS, 0, 0);
     li->entry = entry;
     if (image_size < 0) {
         /* Takes a kimage from the axis devboard SDK.  */
diff --git a/hw/microblaze/boot.c b/hw/microblaze/boot.c
index 925e3f7..8ad3c27 100644
--- a/hw/microblaze/boot.c
+++ b/hw/microblaze/boot.c
@@ -135,7 +135,7 @@ void microblaze_load_kernel(MicroBlazeCPU *cpu, hwaddr ddr_base,
 
     if (kernel_filename) {
         int kernel_size;
-        uint64_t entry, low, high;
+        uint64_t entry, high;
         uint32_t base32;
         int big_endian = 0;
 
@@ -145,7 +145,7 @@ void microblaze_load_kernel(MicroBlazeCPU *cpu, hwaddr ddr_base,
 
         /* Boots a kernel elf binary.  */
         kernel_size = load_elf(kernel_filename, NULL, NULL, NULL,
-                               &entry, &low, &high, NULL,
+                               &entry, NULL, &high, NULL,
                                big_endian, EM_MICROBLAZE, 0, 0);
         base32 = entry;
         if (base32 == 0xc0000000) {
diff --git a/hw/mips/fuloong2e.c b/hw/mips/fuloong2e.c
index f286099..b000ed1 100644
--- a/hw/mips/fuloong2e.c
+++ b/hw/mips/fuloong2e.c
@@ -107,7 +107,7 @@ static void GCC_FMT_ATTR(3, 4) prom_set(uint32_t *prom_buf, int index,
 
 static int64_t load_kernel(CPUMIPSState *env)
 {
-    int64_t kernel_entry, kernel_low, kernel_high, initrd_size;
+    int64_t kernel_entry, kernel_high, initrd_size;
     int index = 0;
     long kernel_size;
     ram_addr_t initrd_offset;
@@ -116,9 +116,9 @@ static int64_t load_kernel(CPUMIPSState *env)
 
     kernel_size = load_elf(loaderparams.kernel_filename, NULL,
                            cpu_mips_kseg0_to_phys, NULL,
-                           (uint64_t *)&kernel_entry,
-                           (uint64_t *)&kernel_low, (uint64_t *)&kernel_high,
-                           NULL, 0, EM_MIPS, 1, 0);
+                           (uint64_t *)&kernel_entry, NULL,
+                           (uint64_t *)&kernel_high, NULL,
+                           0, EM_MIPS, 1, 0);
     if (kernel_size < 0) {
         error_report("could not load kernel '%s': %s",
                      loaderparams.kernel_filename,
diff --git a/hw/moxie/moxiesim.c b/hw/moxie/moxiesim.c
index 51a9828..a765e9f 100644
--- a/hw/moxie/moxiesim.c
+++ b/hw/moxie/moxiesim.c
@@ -52,13 +52,13 @@ typedef struct {
 
 static void load_kernel(MoxieCPU *cpu, LoaderParams *loader_params)
 {
-    uint64_t entry, kernel_low, kernel_high;
+    uint64_t entry, kernel_high;
     int64_t initrd_size;
     long kernel_size;
     ram_addr_t initrd_offset;
 
     kernel_size = load_elf(loader_params->kernel_filename,  NULL, NULL, NULL,
-                           &entry, &kernel_low, &kernel_high, NULL, 1, EM_MOXIE,
+                           &entry, NULL, &kernel_high, NULL, 1, EM_MOXIE,
                            0, 0);
 
     if (kernel_size <= 0) {
diff --git a/hw/nios2/boot.c b/hw/nios2/boot.c
index 88224aa..1df3b66 100644
--- a/hw/nios2/boot.c
+++ b/hw/nios2/boot.c
@@ -139,7 +139,7 @@ void nios2_load_kernel(Nios2CPU *cpu, hwaddr ddr_base,
 
     if (kernel_filename) {
         int kernel_size, fdt_size;
-        uint64_t entry, low, high;
+        uint64_t entry, high;
         int big_endian = 0;
 
 #ifdef TARGET_WORDS_BIGENDIAN
@@ -148,7 +148,7 @@ void nios2_load_kernel(Nios2CPU *cpu, hwaddr ddr_base,
 
         /* Boots a kernel elf binary. */
         kernel_size = load_elf(kernel_filename, NULL, NULL, NULL,
-                               &entry, &low, &high, NULL,
+                               &entry, NULL, &high, NULL,
                                big_endian, EM_ALTERA_NIOS2, 0, 0);
         if ((uint32_t)entry == 0xc0000000) {
             /*
diff --git a/hw/ppc/mac_newworld.c b/hw/ppc/mac_newworld.c
index e42bd7a..4dfbeec 100644
--- a/hw/ppc/mac_newworld.c
+++ b/hw/ppc/mac_newworld.c
@@ -177,7 +177,6 @@ static void ppc_core99_init(MachineState *machine)
     }
 
     if (linux_boot) {
-        uint64_t lowaddr = 0;
         int bswap_needed;
 
 #ifdef BSWAP_NEEDED
@@ -188,9 +187,8 @@ static void ppc_core99_init(MachineState *machine)
         kernel_base = KERNEL_LOAD_ADDR;
 
         kernel_size = load_elf(kernel_filename, NULL,
-                               translate_kernel_address, NULL,
-                               NULL, &lowaddr, NULL, NULL, 1, PPC_ELF_MACHINE,
-                               0, 0);
+                               translate_kernel_address, NULL, NULL, NULL,
+                               NULL, NULL, 1, PPC_ELF_MACHINE, 0, 0);
         if (kernel_size < 0)
             kernel_size = load_aout(kernel_filename, kernel_base,
                                     ram_size - kernel_base, bswap_needed,
diff --git a/hw/ppc/mac_oldworld.c b/hw/ppc/mac_oldworld.c
index 7aba040..f817393 100644
--- a/hw/ppc/mac_oldworld.c
+++ b/hw/ppc/mac_oldworld.c
@@ -150,7 +150,6 @@ static void ppc_heathrow_init(MachineState *machine)
     }
 
     if (linux_boot) {
-        uint64_t lowaddr = 0;
         int bswap_needed;
 
 #ifdef BSWAP_NEEDED
@@ -160,9 +159,8 @@ static void ppc_heathrow_init(MachineState *machine)
 #endif
         kernel_base = KERNEL_LOAD_ADDR;
         kernel_size = load_elf(kernel_filename, NULL,
-                               translate_kernel_address, NULL,
-                               NULL, &lowaddr, NULL, NULL, 1, PPC_ELF_MACHINE,
-                               0, 0);
+                               translate_kernel_address, NULL, NULL, NULL,
+                               NULL, NULL, 1, PPC_ELF_MACHINE, 0, 0);
         if (kernel_size < 0)
             kernel_size = load_aout(kernel_filename, kernel_base,
                                     ram_size - kernel_base, bswap_needed,
diff --git a/hw/ppc/ppc440_bamboo.c b/hw/ppc/ppc440_bamboo.c
index 4c5e9e4..74028dc 100644
--- a/hw/ppc/ppc440_bamboo.c
+++ b/hw/ppc/ppc440_bamboo.c
@@ -172,9 +172,6 @@ static void bamboo_init(MachineState *machine)
     PCIBus *pcibus;
     PowerPCCPU *cpu;
     CPUPPCState *env;
-    uint64_t elf_entry;
-    uint64_t elf_lowaddr;
-    hwaddr loadaddr = LOAD_UIMAGE_LOADADDR_INVALID;
     target_long initrd_size = 0;
     DeviceState *dev;
     int success;
@@ -246,14 +243,14 @@ static void bamboo_init(MachineState *machine)
 
     /* Load kernel. */
     if (kernel_filename) {
+        hwaddr loadaddr = LOAD_UIMAGE_LOADADDR_INVALID;
         success = load_uimage(kernel_filename, &entry, &loadaddr, NULL,
                               NULL, NULL);
         if (success < 0) {
+            uint64_t elf_entry;
             success = load_elf(kernel_filename, NULL, NULL, NULL, &elf_entry,
-                               &elf_lowaddr, NULL, NULL, 1, PPC_ELF_MACHINE,
-                               0, 0);
+                               NULL, NULL, NULL, 1, PPC_ELF_MACHINE, 0, 0);
             entry = elf_entry;
-            loadaddr = elf_lowaddr;
         }
         /* XXX try again as binary */
         if (success < 0) {
diff --git a/hw/ppc/sam460ex.c b/hw/ppc/sam460ex.c
index 1702344..7e59a91 100644
--- a/hw/ppc/sam460ex.c
+++ b/hw/ppc/sam460ex.c
@@ -286,7 +286,6 @@ static void sam460ex_init(MachineState *machine)
     CPUPPCState *env;
     I2CBus *i2c;
     hwaddr entry = UBOOT_ENTRY;
-    hwaddr loadaddr = LOAD_UIMAGE_LOADADDR_INVALID;
     target_long initrd_size = 0;
     DeviceState *dev;
     SysBusDevice *sbdev;
@@ -426,17 +425,16 @@ static void sam460ex_init(MachineState *machine)
 
     /* Load kernel. */
     if (machine->kernel_filename) {
+        hwaddr loadaddr = LOAD_UIMAGE_LOADADDR_INVALID;
         success = load_uimage(machine->kernel_filename, &entry, &loadaddr,
                               NULL, NULL, NULL);
         if (success < 0) {
-            uint64_t elf_entry, elf_lowaddr;
+            uint64_t elf_entry;
 
-            success = load_elf(machine->kernel_filename, NULL,
-                               NULL, NULL, &elf_entry,
-                               &elf_lowaddr, NULL, NULL, 1, PPC_ELF_MACHINE, 0,
-                               0);
+            success = load_elf(machine->kernel_filename, NULL, NULL, NULL,
+                               &elf_entry, NULL, NULL, NULL,
+                               1, PPC_ELF_MACHINE, 0, 0);
             entry = elf_entry;
-            loadaddr = elf_lowaddr;
         }
         /* XXX try again as binary */
         if (success < 0) {
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index 9bce189..cbcd93b 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -2919,18 +2919,15 @@ static void spapr_machine_init(MachineState *machine)
     }
 
     if (kernel_filename) {
-        uint64_t lowaddr = 0;
-
         spapr->kernel_size = load_elf(kernel_filename, NULL,
                                       translate_kernel_address, spapr,
-                                      NULL, &lowaddr, NULL, NULL, 1,
+                                      NULL, NULL, NULL, NULL, 1,
                                       PPC_ELF_MACHINE, 0, 0);
         if (spapr->kernel_size == ELF_LOAD_WRONG_ENDIAN) {
             spapr->kernel_size = load_elf(kernel_filename, NULL,
-                                          translate_kernel_address, spapr, NULL,
-                                          &lowaddr, NULL, NULL, 0,
-                                          PPC_ELF_MACHINE,
-                                          0, 0);
+                                          translate_kernel_address, spapr,
+                                          NULL, NULL, NULL, NULL, 0,
+                                          PPC_ELF_MACHINE, 0, 0);
             spapr->kernel_le = spapr->kernel_size > 0;
         }
         if (spapr->kernel_size < 0) {
diff --git a/hw/ppc/virtex_ml507.c b/hw/ppc/virtex_ml507.c
index 78c4901..c790c11 100644
--- a/hw/ppc/virtex_ml507.c
+++ b/hw/ppc/virtex_ml507.c
@@ -250,12 +250,12 @@ static void virtex_init(MachineState *machine)
     sysbus_connect_irq(SYS_BUS_DEVICE(dev), 0, irq[TIMER_IRQ]);
 
     if (kernel_filename) {
-        uint64_t entry, low, high;
+        uint64_t entry, high;
         hwaddr boot_offset;
 
         /* Boots a kernel elf binary.  */
         kernel_size = load_elf(kernel_filename, NULL, NULL, NULL,
-                               &entry, &low, &high, NULL, 1, PPC_ELF_MACHINE,
+                               &entry, NULL, &high, NULL, 1, PPC_ELF_MACHINE,
                                0, 0);
         boot_info.bootstrap_pc = entry & 0x00ffffff;
 
diff --git a/hw/riscv/boot.c b/hw/riscv/boot.c
index 4c6c101..21adaae 100644
--- a/hw/riscv/boot.c
+++ b/hw/riscv/boot.c
@@ -91,10 +91,10 @@ target_ulong riscv_load_firmware(const char *firmware_filename,
                                  hwaddr firmware_load_addr,
                                  symbol_fn_t sym_cb)
 {
-    uint64_t firmware_entry, firmware_start, firmware_end;
+    uint64_t firmware_entry;
 
     if (load_elf_ram_sym(firmware_filename, NULL, NULL, NULL,
-                         &firmware_entry, &firmware_start, &firmware_end, NULL,
+                         &firmware_entry, NULL, NULL, NULL,
                          0, EM_RISCV, 1, 0, NULL, true, sym_cb) > 0) {
         return firmware_entry;
     }
@@ -110,10 +110,10 @@ target_ulong riscv_load_firmware(const char *firmware_filename,
 
 target_ulong riscv_load_kernel(const char *kernel_filename, symbol_fn_t sym_cb)
 {
-    uint64_t kernel_entry, kernel_high;
+    uint64_t kernel_entry;
 
     if (load_elf_ram_sym(kernel_filename, NULL, NULL, NULL,
-                         &kernel_entry, NULL, &kernel_high, NULL, 0,
+                         &kernel_entry, NULL, NULL, NULL, 0,
                          EM_RISCV, 1, 0, NULL, true, sym_cb) > 0) {
         return kernel_entry;
     }
diff --git a/hw/xtensa/sim.c b/hw/xtensa/sim.c
index aeb46d8..cbac50d 100644
--- a/hw/xtensa/sim.c
+++ b/hw/xtensa/sim.c
@@ -106,9 +106,8 @@ void xtensa_sim_load_kernel(XtensaCPU *cpu, MachineState *machine)
 
     if (kernel_filename) {
         uint64_t elf_entry;
-        uint64_t elf_lowaddr;
         int success = load_elf(kernel_filename, NULL, translate_phys_addr, cpu,
-                               &elf_entry, &elf_lowaddr, NULL, NULL, big_endian,
+                               &elf_entry, NULL, NULL, NULL, big_endian,
                                EM_XTENSA, 0, 0);
 
         if (success > 0) {
diff --git a/hw/xtensa/xtfpga.c b/hw/xtensa/xtfpga.c
index 10de158..b1470b8 100644
--- a/hw/xtensa/xtfpga.c
+++ b/hw/xtensa/xtfpga.c
@@ -413,9 +413,8 @@ static void xtfpga_init(const XtfpgaBoardDesc *board, MachineState *machine)
         env->regs[2] = tagptr;
 
         uint64_t elf_entry;
-        uint64_t elf_lowaddr;
         int success = load_elf(kernel_filename, NULL, translate_phys_addr, cpu,
-                &elf_entry, &elf_lowaddr, NULL, NULL, be, EM_XTENSA, 0, 0);
+                &elf_entry, NULL, NULL, NULL, be, EM_XTENSA, 0, 0);
         if (success > 0) {
             entry_point = elf_entry;
         } else {