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use $t9 instead of $ra as a base register

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phcoder 2009-10-19 12:58:52 +02:00
parent 19f9e339c3
commit 65aa1698d3
1 changed files with 6 additions and 5 deletions
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11
kern/mips/startup.S
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@ -42,13 +42,14 @@ kernel_image_size:
.long 0
codestart:
/* Decompress the payload. */
addiu $t2, $ra, GRUB_KERNEL_CPU_RAW_SIZE - BASE_ADDR
move $t9, $ra
addiu $t2, $t9, GRUB_KERNEL_CPU_RAW_SIZE - BASE_ADDR
lui $t1, %hi(compressed)
addiu $t1, %lo(compressed)
lw $t3, (GRUB_KERNEL_CPU_COMPRESSED_SIZE - BASE_ADDR)($ra)
lw $t3, (GRUB_KERNEL_CPU_COMPRESSED_SIZE - BASE_ADDR)($t9)
/* $t2 contains source compressed address, $t1 is destination,
$t3 is compressed size. FIXME: put LZMA here. Don't clober $ra
$t3 is compressed size. FIXME: put LZMA here. Don't clober $t9
*/
reloccont:
lb $t4, 0($t2)
@ -61,7 +62,7 @@ reloccont:
/* Move the modules out of BSS. */
lui $t1, %hi(_start)
addiu $t1, %lo(_start)
lw $t2, (GRUB_KERNEL_CPU_KERNEL_IMAGE_SIZE - BASE_ADDR)($ra)
lw $t2, (GRUB_KERNEL_CPU_KERNEL_IMAGE_SIZE - BASE_ADDR)($t9)
addu $t2, $t1, $t2
lui $t1, %hi(_end)
@ -73,7 +74,7 @@ reloccont:
/* Pass modules address as first argument. */
// move $a0, $t1
lw $t3, (GRUB_KERNEL_CPU_TOTAL_MODULE_SIZE - BASE_ADDR)($ra)
lw $t3, (GRUB_KERNEL_CPU_TOTAL_MODULE_SIZE - BASE_ADDR)($t9)
/* Backward copy. */
add $t1, $t1, $t3