diff options
Diffstat (limited to 'newlib/libc/machine/rx/setjmp.S')
| -rw-r--r-- | newlib/libc/machine/rx/setjmp.S | 89 |
1 files changed, 0 insertions, 89 deletions
diff --git a/newlib/libc/machine/rx/setjmp.S b/newlib/libc/machine/rx/setjmp.S deleted file mode 100644 index bccc50328..000000000 --- a/newlib/libc/machine/rx/setjmp.S +++ /dev/null @@ -1,89 +0,0 @@ -# setjmp/longjmp for Renesas RX. -# -# The jmpbuf looks like this: -# -# Register jmpbuf offset -# R0 0x0 -# R1 0x4 -# R2 0x8 -# R3 0xc -# R4 0x10 -# R5 0x14 -# R6 0x18 -# R7 0x1c -# R8 0x20 -# R9 0x24 -# R10 0x28 -# R11 0x2c -# R12 0x30 -# R13 0x34 -# R14 0x38 -# R15 0x3c -# PC 0x40 -# -# R1 contains the pointer to jmpbuf: -# -# int R1 = setjmp (jmp_buf R1) -# void longjmp (jmp_buf R1, int R2) -# -# The ABI allows for R1-R5 to be clobbered by functions. We must be -# careful to always leave the stack in a usable state in case an -# interrupt happens. - - .text - .global _setjmp - .type _setjmp, @function -_setjmp: - mov.l r0, [r1] ; save all the general registers - mov.l r1, 0x4[r1] ; longjmp won't use this, but someone else might. - mov.l r2, 0x8[r1] - mov.l r3, 0xc[r1] - mov.l r4, 0x10[r1] - mov.l r5, 0x14[r1] - mov.l r6, 0x18[r1] - mov.l r7, 0x1c[r1] - mov.l r8, 0x20[r1] - mov.l r9, 0x24[r1] - mov.l r10, 0x28[r1] - mov.l r11, 0x2c[r1] - mov.l r12, 0x30[r1] - mov.l r13, 0x34[r1] - mov.l r14, 0x38[r1] - mov.l r15, 0x3c[r1] - mov.l [r0], r2 ; get return address off the stack - mov.l r2, 0x40[r1] ; PC - mov #0, r1 ; Return 0. - rts -.Lend1: - .size _setjmp, .Lend1 - _setjmp - - - .global _longjmp - .type _longjmp, @function -_longjmp: - tst r2, r2 ; Set the Z flag if r2 is 0. - stz #1, r2 ; If the Z flag was set put 1 into the return register. - mov r2, 4[r1] ; Put r2 (our return value) into the setjmp buffer as r1. - - mov.l [r1], r0 ; Restore the stack - there's a slot for PC - mov.l 0x40[r1], r2 ; Get the saved PC - mov.l r2, [r0] ; Overwrite the old return address - - mov.l 0x3c[r1], r15 - mov.l 0x38[r1], r14 - mov.l 0x34[r1], r13 - mov.l 0x30[r1], r12 - mov.l 0x2c[r1], r11 - mov.l 0x28[r1], r10 - mov.l 0x24[r1], r9 - mov.l 0x20[r1], r8 - mov.l 0x1c[r1], r7 - mov.l 0x18[r1], r6 - mov.l 0x14[r1], r5 - mov.l 0x10[r1], r4 - mov.l 0xc[r1], r3 - mov.l 0x8[r1], r2 - mov.l 0x4[r1], r1 ; This sets up the new return value - rts -.Lend2: - .size _longjmp, .Lend2 - _longjmp |