Implemented register dump routine

kernel/Makefile.Module

@@ -18,10 +18,10 @@ LIB_INCLUDE_DIRS := ../lib/include
 # Module sources and their object files
 
 SRC = $(wildcard $(SRC_DIR)/*.c)
-ASM := $(wildcard $(ASM_DIR)/*.s)
+ASM := $(wildcard $(ASM_DIR)/*.S)
 
 OBJ := $(SRC:$(SRC_DIR)/%.c=$(OBJ_DIR)/%.o)
-OBJ += $(ASM:$(ASM_DIR)/%.s=$(OBJ_DIR)/%.o)
+OBJ += $(ASM:$(ASM_DIR)/%.S=$(OBJ_DIR)/%.o)
 
 # Compiler settings
 
@@ -43,7 +43,7 @@ $(MOD_OBJ): $(OBJ) | $(MOBJ_DIR)
 $(OBJ_DIR)/%.o: $(SRC_DIR)/%.c | $(OBJ_DIR)
 	$(CC) $< -o $@ $(CFLAGS) $(HFLAGS) $(INCFLAGS) 
 
-$(OBJ_DIR)/%.o: $(ASM_DIR)/%.s | $(OBJ_DIR)
+$(OBJ_DIR)/%.o: $(ASM_DIR)/%.S | $(OBJ_DIR)
 	$(CC) $< -o $@ $(CFLAGS) $(HFLAGS) $(INCFLAGS) 
 
 $(OBJ_DIR) $(MOBJ_DIR):

kernel/include/kernel/log.h

@@ -0,0 +1,14 @@
+#ifndef LOG_H_
+#define LOG_H_
+
+#include <stdint.h>
+
+/*
+ * reg_dump:
+ *  Dumps the content of general purpose registers on the screen.
+ *
+ */
+
+void reg_dump(void);
+
+#endif

kernel/log/asm/dump.S

@@ -0,0 +1,122 @@
+.global reg_dump
+.extern printf
+
+.text
+
+/*
+ * reg_dump:
+ * ---------
+ *
+ *  Save the context of caller in prev_* memory locations and print them.
+ *
+ */
+
+reg_dump:
+
+    mov %esp, prev_esp
+    add $0x04, prev_esp
+
+    mov %ebp, prev_ebp
+
+    mov %eax, prev_eax
+    mov %ecx, prev_ecx
+    mov %edx, prev_edx
+    mov %ebx, prev_ebx
+    mov %esi, prev_esi
+    mov %edi, prev_edi
+
+    mov (%esp), %eax
+    mov %eax, prev_eip
+
+    push %ebp
+    mov %esp, %ebp
+
+    push prev_eax
+    push $EAX_FMT
+    call printf
+
+    add $0x08, %esp
+
+    push prev_ecx
+    push $ECX_FMT
+    call printf
+
+    add $0x08, %esp
+
+
+    push prev_edx
+    push $EDX_FMT
+    call printf
+
+    add $0x08, %esp
+
+
+    push prev_ebx
+    push $EBX_FMT
+    call printf
+
+    add $0x08, %esp
+
+
+    push prev_esp
+    push $ESP_FMT
+    call printf
+
+    add $0x08, %esp
+
+
+    push prev_ebp
+    push $EBP_FMT
+    call printf
+
+    add $0x08, %esp
+
+
+    push prev_esi
+    push $ESI_FMT
+    call printf
+
+    add $0x08, %esp
+
+
+    push prev_edi
+    push $EDI_FMT
+    call printf
+
+    add $0x08, %esp
+
+    push prev_eip
+    push $EIP_FMT
+    call printf
+
+    add $0x08, %esp
+
+    mov %ebp, %esp
+    pop %ebp
+
+    ret
+
+.data
+
+    EAX_FMT: .string "eax: 0x%x\n"
+    ECX_FMT: .string "ecx: 0x%x\n"
+    EDX_FMT: .string "edx: 0x%x\n"
+    EBX_FMT: .string "ebx: 0x%x\n"
+    ESP_FMT: .string "esp: 0x%x\n"
+    EBP_FMT: .string "ebp: 0x%x\n"
+    ESI_FMT: .string "esi: 0x%x\n"
+    EDI_FMT: .string "edi: 0x%x\n"
+    EIP_FMT: .string "eip: 0x%x\n"
+
+.bss
+
+    prev_eax: .skip 4
+    prev_ecx: .skip 4
+    prev_edx: .skip 4
+    prev_ebx: .skip 4
+    prev_esp: .skip 4
+    prev_ebp: .skip 4
+    prev_esi: .skip 4
+    prev_edi: .skip 4
+    prev_eip: .skip 4
+