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Fix an off-by-32 error - space was padded out to the 96th byte for the 

DEC disk boot block header, but it's only 64 bytes long.  Gives us
another 32 bytes in the first stage.

Don't use a roll-your-own START_FRAME size and offsets for the stack
and ra - use the <mips/asm.h> provided CALLFRAME_SIZ, CALLFRAME_RA and
CALLFRAME_SP
This commit is contained in:
simonb 1999-04-12 03:53:13 +00:00
parent 6844116ae2
commit 520c13bcc8
1 changed files with 8 additions and 12 deletions
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20
sys/arch/pmax/stand/lib/start.S
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@ -1,4 +1,4 @@
/* $NetBSD: start.S,v 1.13 1999/04/11 04:27:53 simonb Exp $ */
/* $NetBSD: start.S,v 1.14 1999/04/12 03:53:13 simonb Exp $ */
/*-
* Copyright (c) 1999 The NetBSD Foundation, Inc.
@ -107,22 +107,18 @@ Dec_Diskboot:
.word Dec_Diskboot /* loadAddr */
.word start /* execAddr */
.word 16, 0 /* map[0] numBlocks, startBlock */
.word 0,0, 0,0, 0,0, 0,0
.word 0,0, 0,0, 0,0, 0,0
.word 0,0, 0,0, 0,0, 0,0 /* pad to 64 bytes (start of label) */
Label_goes_here:
.word 0,0, 0,0, 0,0, 0,0, 0,0, 0,0, 0,0, 0,0
.word 0,0, 0,0, 0,0, 0,0, 0,0, 0,0, 0,0, 0,0
.word 0,0, 0,0, 0,0, 0,0, 0,0, 0,0, 0,0, 0,0 /* 276 bytes for ... */
.word 0,0, 0,0, 0,0, 0,0, 0,0, 0,0, 0,0, 0,0 /* ... BSD label */
.word 0,0, 0,0, 0,0, 0,0, 0,0, 0,0, 0,0, 0,0
.word 0,0, 0,0, 0,0, 0,0, 0,0, 0,0, 0,0, 0,0
.word 0,0, 0,0, 0
#endif
.extern callv, 4
/*
* Amount to take off of the stack for the benefit of the debugger.
*/
#define START_FRAME ((4 * 4) + 4 + 4)
.globl start
start:
@ -130,9 +126,9 @@ start:
#ifdef __GP_SUPPORT__
la gp, _C_LABEL (_gp)
#endif
la sp, start - START_FRAME
sw zero, START_FRAME - 4(sp) # Zero out old ra for debugger
sw zero, START_FRAME - 8(sp) # Zero out old fp for debugger
la sp, start - CALLFRAME_SIZ
sw zero, CALLFRAME_RA(sp) # Zero out old ra for debugger
sw zero, CALLFRAME_SP(sp) # Zero out old fp for debugger
move s0, a0 # save argc
move s1, a1 # save argv
beq a2, DEC_REX_MAGIC, 1f # jump if boot from DS5000