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Enlarge the stack frame to 16 bytes, and store the return address 8

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bytes in instead of at the start, to leave room for a .cpload to store
the gp at offset 0 in the frame.  Allow 8 bytes for each (for mips64
one day...).

.cpload overwrite problems noted by Michael Hitch.
This commit is contained in:
simonb 2001-08-16 03:44:46 +00:00
parent aeb5917f66
commit 9a68629ca6
1 changed files with 8 additions and 8 deletions
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16
lib/csu/mips/dot_init.h
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@ -1,4 +1,4 @@
/* $NetBSD: dot_init.h,v 1.1 2001/07/17 15:20:23 simonb Exp $ */
/* $NetBSD: dot_init.h,v 1.2 2001/08/16 03:44:46 simonb Exp $ */
/*-
* Copyright (c) 2001 Ross Harvey
@ -50,26 +50,26 @@
#define ra "$31"
/*
* XXX:
* stack frame is only 8 bytes long (big enough to store the caller's RA).
* Does it need to be 32 bytes to keep gdb happy?
* The stack frame is 16 bytes long; big enough to store the GP saved
* by .cpload (at offset 0) and the caller's RA (at offset 8),
* allowing for 64bit addresses.
*/
#define MD_SECTION_PROLOGUE(sect, entry_pt) \
__asm ( \
".section "#sect",\"ax\",@progbits \n"\
#entry_pt": \n"\
" subu $sp,$sp,8 \n"\
" sw "ra",0($sp) \n"\
" subu $sp,$sp,16 \n"\
" sw "ra",8($sp) \n"\
" /* fall thru */ \n"\
".previous")
#define MD_SECTION_EPILOGUE(sect) \
__asm ( \
".section "#sect",\"ax\",@progbits \n"\
" lw "ra",0($sp) \n"\
" lw "ra",8($sp) \n"\
" .set noreorder \n"\
" j "ra" \n"\
" addu $sp,$sp,8 \n"\
" addu $sp,$sp,16 \n"\
" .set reorder \n"\
".previous")