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The top-level stack frame now clears %ebp to mark the end.

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git-svn-id: file:///srv/svn/repos/haiku/trunk/current@10939 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler 2005-01-21 22:02:49 +00:00
parent 864a2c6456
commit 9cc2fa71c5
1 changed files with 3 additions and 2 deletions
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5
src/kernel/core/arch/x86/arch_x86.S
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@ -121,7 +121,8 @@ _copy_more:
movl %edx,-8(%ebx) // args2 movl %edx,-8(%ebx) // args2
movl %ebx,-12(%ebx) // fake return address to copied exit stub movl %ebx,-12(%ebx) // fake return address to copied exit stub
sub $12,%ebx sub $12,%ebx
xorl %ebp, %ebp // this is the last stack frame - we don't need one on return
// (%ebp marks the beginning of this stack frame)
pushl $USER_DATA_SEG // user data segment pushl $USER_DATA_SEG // user data segment
pushl %ebx // user stack pushl %ebx // user stack
pushl $(1 << 9) | 2 // user flags pushl $(1 << 9) | 2 // user flags
@ -176,7 +177,7 @@ FUNCTION(arch_dbg_save_registers):
pushfl pushfl
popl %eax popl %eax
mov %eax, 36(%esi) movl %eax, 36(%esi)
movl %cs, 40(%esi) movl %cs, 40(%esi)
movl %ss, 44(%esi) movl %ss, 44(%esi)