diff options
Diffstat (limited to 'newlib/libc/machine/m32r/setjmp.S')
| -rw-r--r-- | newlib/libc/machine/m32r/setjmp.S | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/newlib/libc/machine/m32r/setjmp.S b/newlib/libc/machine/m32r/setjmp.S new file mode 100644 index 00000000000..e6938efe34c --- /dev/null +++ b/newlib/libc/machine/m32r/setjmp.S @@ -0,0 +1,52 @@ +# setjmp/longjmp for m32r. The jmpbuf looks like this: +# +# Register jmpbuf offset +# reserved 0x00 +# R8 0x04 +# R9 0x08 +# R10 0x0c +# R11 0x10 +# R12 0x14 +# R13 (FP) 0x18 +# R14 (LR) 0x1c +# R15 (SP) 0x20 +# reserved 0x24 + + .text + .global setjmp +setjmp: + ;addi r0, #-4 ; commented out as first word is reserved + ;st r1, @+r0 + st r8, @+r0 + st r9, @+r0 + st r10, @+r0 + st r11, @+r0 + st r12, @+r0 + st r13, @+r0 + st r14, @+r0 + st r15, @+r0 + +# Return 0 to caller. + ldi r0, #0 + jmp lr + + .global longjmp +longjmp: + addi r0, #4 ; first word is reserved + ;ld r1, @r0+ + ld r8, @r0+ + ld r9, @r0+ + ld r10, @r0+ + ld r11, @r0+ + ld r12, @r0+ + ld r13, @r0+ + ld r2, @r0+ ; return address + ld r15, @r0+ + +# If caller attempted to return 0, return 1 instead. + + mv r0, r1 + bnez r0, .Lnonzero + ldi r0, #1 +.Lnonzero: + jmp r2 |