components: libc: fix pointer-to-integer cast warnings and address truncation

[Problem Description]
1. When enabling RT_USING_MODULE=y, compilation warnings occur:
   dlelf.c:386:27: warning: cast from pointer to integer of different size
   dlelf.c:398:25: warning: cast from pointer to integer of different size
   dlelf.c:408:24: warning: cast from pointer to integer of different size

2. On RV64 architectures (e.g. Sophgo SG2042 with RISC-V Sv39 and 40-bit physical addressing),
   dlsym may fail when accessing addresses beyond 32-bit range.

[Root Cause]
In dlmodule_load_relocated_object() and dlmodule_symbol_find(),
pointer is cast to rt_uint32_t which truncates:
| rt_ubase_t rodata_addr = (rt_uint32_t)ptr;
This causes:
- Warnings on 64-bit systems (pointer width > 32-bit)
- Actual address truncation on RV64 when physical address exceeds 32-bit

[Solution]
Replace rt_uint32_t with architecture-adaptive rt_ubase_t:
| rt_ubase_t rodata_addr = (rt_ubase_t)ptr;
The rt_ubase_t is defined in include/rttypes.h as:
| #ifdef ARCH_CPU_64BIT
|   typedef rt_uint64_t rt_ubase_t;
| #else
|   typedef rt_uint32_t rt_ubase_t;
| #endif
This ensures correct width casting for both 32/64-bit architectures.

Signed-off-by: Liu Gui <[email protected]>

1 files changed, 1 insertions, 1 deletions

diff --git a/components/libc/posix/libdl/dlmodule.h b/components/libc/posix/libdl/dlmodule.h
index 62a0cdd5d3..75ca325800 100644
--- a/components/libc/posix/libdl/dlmodule.h
+++ b/components/libc/posix/libdl/dlmodule.h
@@ -82,6 +82,6 @@ void dlmodule_exit(int ret_code);
 
 struct rt_dlmodule *dlmodule_find(const char *name);
 
-rt_uint32_t dlmodule_symbol_find(const char *sym_str);
+rt_ubase_t dlmodule_symbol_find(const char *sym_str);
 
 #endif