Changeset 47246f4 in mainline for uspace/lib/libc/arch/ia32/src

Timestamp:

2009-12-30T18:34:15Z (16 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

01fda09

Parents:

ee2f1aae

Message:

Pair the stack frame address and the return address in a more meaningful way.
Also do the 'right' thing on sparc64 and recognize the end of the stack trace
by -0x7ff stored in %fp.

Location:

uspace/lib/libc/arch/ia32/src

Files:

• entry.s (modified) (1 diff)
• stacktrace.S (modified) (2 diffs)
• thread_entry.s (modified) (1 diff)

uspace/lib/libc/arch/ia32/src/entry.s

@@ -56 +56 @@
 0:
         #
-        # Stop stack traces in this function.
+        # Create the first stack frame.
         #
-        xorl %ebp, %ebp
+        pushl $0 
+        movl %esp, %ebp
 
         # Pass the PCB pointer to __main as the first argument

uspace/lib/libc/arch/ia32/src/stacktrace.S

@@ -33 +33 @@
 .global frame_pointer_validate
 .global return_address_get
+.global program_counter_get
 
 frame_pointer_get:
@@ -51 +52 @@
         movl 4(%eax), %eax
         ret
+
+program_counter_get:
+        movl (%esp), %eax
+        ret

uspace/lib/libc/arch/ia32/src/thread_entry.s

@@ -42 +42 @@
 
         #
-        # Stop stack traces in this function.
+        # Create the first stack frame.
         #
-        xorl %ebp, %ebp
+        pushl $0
+        mov %esp, %ebp
 
         #