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Fix setjmp/longjmp for the moxie port.

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These functions needs to save and restore the stack frame, because
that's where the return address is stored.
This commit is contained in:
Anthony Green 2019-12-13 13:08:06 -05:00 committed by Ken Brown
parent 145fffb706
commit d41f7655f9
2 changed files with 48 additions and 25 deletions
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2
newlib/libc/include/machine/setjmp.h
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@ -238,7 +238,7 @@ _BEGIN_STD_C
#endif
#ifdef __moxie__
#define _JBLEN 16
#define _JBLEN 19
#endif
#ifdef __CRX__

71
newlib/libc/machine/moxie/setjmp.S
View File

@ -1,5 +1,5 @@
/* A setjmp.c for Moxie
Copyright (C) 2009 Anthony Green
Copyright (C) 2009, 2019 Anthony Green
The authors hereby grant permission to use, copy, modify, distribute,
and license this software and its documentation for any purpose, provided
@ -12,28 +12,31 @@
they apply. */
# setjmp/longjmp for moxie. The jmpbuf looks like this:
#
# Register jmpbuf offset
# $r0 0x00
# $r1 0x04
# $r2 0x08
# $r3 0x0c
# $r4 0x10
# $r5 0x14
# $r6 0x18
# $r7 0x1c
# $r8 0x20
# $r9 0x24
# $r10 0x28
# $r11 0x2c
# $r12 0x30
# $r13 0x34
# $fp 0x38
# $sp 0x3c
.text
.global setjmp
.type setjmp,@function
#
# Register jmpbuf offset
# $r0 0x00
# $r1 0x04
# $r2 0x08
# $r3 0x0c
# $r4 0x10
# $r5 0x14
# $r6 0x18
# $r7 0x1c
# $r8 0x20
# $r9 0x24
# $r10 0x28
# $r11 0x2c
# $r12 0x30
# $r13 0x34
# $fp 0x38
# $sp 0x3c
# stack frame fp 0x40
# stack frame ra 0x44
# stack frame sc 0x48
.text
.global setjmp
.type setjmp,@function
setjmp:
st.l ($r0), $r0
sto.l 0x04($r0), $r1
@ -51,6 +54,13 @@ setjmp:
sto.l 0x34($r0), $r13
sto.l 0x38($r0), $sp
sto.l 0x3c($r0), $fp
ldo.l $r1, 0x0($fp)
sto.l 0x40($r0), $r1
ldo.l $r1, 0x04($fp)
sto.l 0x44($r0), $r1
ldo.l $r1, 0x08($fp)
sto.l 0x48($r0), $r1
ldo.l $r1, 0x04($r0)
xor $r0, $r0
ret
.Lend1:
@ -62,7 +72,6 @@ longjmp:
ldi.l $r2, 0x00
cmp $r1, $r2
beq .Lreturn1
ldo.l $r1, 0x04($r0)
ldo.l $r2, 0x08($r0)
ldo.l $r3, 0x0c($r0)
ldo.l $r4, 0x10($r0)
@ -77,6 +86,13 @@ longjmp:
ldo.l $r13, 0x34($r0)
ldo.l $sp, 0x38($r0)
ldo.l $fp, 0x3c($r0)
ldo.l $r1, 0x40($r0)
sto.l 0x0($fp), $r1
ldo.l $r1, 0x44($r0)
sto.l 0x4($fp), $r1
ldo.l $r1, 0x48($r0)
sto.l 0x8($fp), $r1
ldo.l $r1, 0x04($r0)
mov $r0, $r1
ret
.Lreturn1:
@ -95,6 +111,13 @@ longjmp:
ldo.l $r13, 0x34($r0)
ldo.l $sp, 0x38($r0)
ldo.l $fp, 0x3c($r0)
ldo.l $r1, 0x40($r0)
sto.l 0x0($fp), $r1
ldo.l $r1, 0x44($r0)
sto.l 0x4($fp), $r1
ldo.l $r1, 0x48($r0)
sto.l 0x8($fp), $r1
ldo.l $r1, 0x04($r0)
ldi.l $r0, 0x01
ret
.Lend2: