Changeset 00a44bc in mainline for arch/ia64/src/start.S

Timestamp:

2005-05-11T14:12:53Z (20 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

724b58a

Parents:

9db5b66

Message:

IA-64 work.
Give up attempts to persuade ld to patch the kernel image with proper hardcoded lenghts and addresses.
Add special sections and calculate the numbers manually.
Fix wrong order of operands in sub instructions in memcpy() implementation.

File:

• arch/ia64/src/start.S (modified) (3 diffs)

arch/ia64/src/start.S

@@ -29 +29 @@
 #include <arch/ski/ski.h>
 
+.section K_TEXT_START
+.global k_text_start
+k_text_start:
+
+.section K_TEXT_END
+.global k_text_end
+k_text_end:
+
+.section K_DATA_START
+.global k_data_start
+k_data_start:
+
+.section K_DATA_END
+.global k_data_end
+k_data_end:
+
+
 .text
 
@@ -36 +53 @@
 kernel_image_start:
         # initialize gp (Global Pointer) register
-        mov r1=kernel_image_start;
+        movl r1=k_text_start;
 
         # set stack pointer to some sane value
-        mov r12=stack0
+        movl r12=stack0
+
+        #
+        # Initialize hardcoded_* variables.
+        # (IA-64 port doesn't get these values from linker.)
+        #
+        movl r8 = k_text_start  ;;
+        movl r9 = k_text_end    ;;
+        sub r8 = r9, r8         ;;
+        addl r10 = @gprel(hardcoded_ktext_size), gp;;
+        st4 [r10] = r8          ;;
+
+        movl r8 = k_data_start  ;;
+        movl r9 = k_data_end    ;;
+        sub r8 = r9, r8         ;;
+        addl r10 = @gprel(hardcoded_kdata_size), gp;;
+        st4 [r10] = r8          ;;
+        
+        addl r10 = @gprel(hardcoded_load_address), gp;;
+        st8 [r10] = r1
         
         # initialize Ski console using SSC (Simulator System Call)
@@ -45 +81 @@
         break 0x80000
 
-        br.call.sptk.many rp=main_bsp
+        br.call.sptk.many b0=main_bsp
 
 0:
         br 0b
+