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* Copyright © 2025 Martin Storsjo
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* modification, are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright notice, this
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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#define PRIVATE_PREFIX selftest_
#include "src/checkasm_config.h"
#if ARCH_AARCH64
#include "src/arm/asm.S"
function sigill_aarch64, export=1
.inst 0 // udf #0
ret
endfunc
.macro clobber_x reg
function clobber_\reg, export=1
mov \reg, #0x42
ret
endfunc
.endm
.macro clobber_d reg
function clobber_d\reg, export=1
movi v\reg\().8b, #0x42
ret
endfunc
.endm
.macro clobber_v_upper reg
function clobber_v\reg\()_upper, export=1
str d\reg, [sp, #-16]!
movi v\reg\().16b, #0x42
ldr d\reg, [sp], #16
ret
endfunc
.endm
.irp r, x0, x1, x2, x3, x4, x5, x6, x7, x8, x9, x10, x11, x12, x13, x14, x15, x16, x17
clobber_x \r
.endr
// x18 skipped
.irp r, x19, x20, x21, x22, x23, x24, x25, x26, x27, x28, x29
clobber_x \r
.endr
.irp r, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31
clobber_d \r
.endr
.irp r, 8, 9, 10, 11, 12, 13, 14, 15
clobber_v_upper \r
.endr
// void clobber_stack_args_aarch64(int, int, int, int, int, int, int, int, int, int, int);
//
// Write into the stack of the caller, overwriting the arguments that are on
// the stack. This is legal to do.
function clobber_stack_args_aarch64, export=1
mov w0, #0x42
#ifdef __APPLE__
str w0, [sp, #0]
str w0, [sp, #4]
str w0, [sp, #8]
#else
str w0, [sp, #0]
str w0, [sp, #8]
str w0, [sp, #16]
#endif
ret
endfunc
// void clobber_stack_aarch64(int, int, int, int, int, int, int, int, int, int, int);
//
// Write into the stack of the caller, writing past the arguments on the stack
// that we are allowed to touch.
function clobber_stack_aarch64, export=1
mov w0, #0x42
#ifdef __APPLE__
str w0, [sp, #0]
str w0, [sp, #4]
str w0, [sp, #8]
// This write on its own falls within the 8 byte stack slot of
// the third stack argument (above), which we are allowed to clobber,
// so the wrapper won't notice it; we need to write past it for it to
// be noticed.
str w0, [sp, #12]
// Write past the 8 byte stack slot of the third/fourth argument, to
// allow checked_call to catch it.
str w0, [sp, #16]
#else
str w0, [sp, #0]
str w0, [sp, #8]
str w0, [sp, #16]
str w0, [sp, #24]
#endif
ret
endfunc
// void check_max_int_args_aarch64(int, int, int, int, int, int, int, int, int, int, int, int, int, int, int);
function check_max_int_args_aarch64, export=1
#ifdef __APPLE__
ldr w8, [sp, #0]
ldr w9, [sp, #4]
ldr w10, [sp, #8]
ldr w11, [sp, #12]
ldr w12, [sp, #16]
ldr w13, [sp, #20]
ldr w14, [sp, #24]
#else
ldr w8, [sp, #0]
ldr w9, [sp, #8]
ldr w10, [sp, #16]
ldr w11, [sp, #24]
ldr w12, [sp, #32]
ldr w13, [sp, #40]
ldr w14, [sp, #48]
#endif
.macro check_reg reg, val
cmp \reg, #\val
bne 9f
.endm
check_reg w0, 1
check_reg w1, 2
check_reg w2, 3
check_reg w3, 4
check_reg w4, 5
check_reg w5, 6
check_reg w6, 7
check_reg w7, 8
check_reg w8, 9
check_reg w9, 10
check_reg w10, 11
check_reg w11, 12
check_reg w12, 13
check_reg w13, 14
check_reg w14, 15
ret
9:
.inst 0 // udf #0
ret
.purgem check_reg
endfunc
// void check_max_int64_args_aarch64(int64_t, int64_t, int64_t, int64_t, int64_t, int64_t, int64_t, int64_t, int64_t, int64_t, int64_t, int64_t, int64_t, int64_t, int64_t);
function check_max_int64_args_aarch64, export=1
ldr x8, [sp, #0]
ldr x9, [sp, #8]
ldr x10, [sp, #16]
ldr x11, [sp, #24]
ldr x12, [sp, #32]
ldr x13, [sp, #40]
ldr x14, [sp, #48]
.macro check_reg reg, val
cmp \reg, #\val
bne 9f
.endm
check_reg x0, 1
check_reg x1, 2
check_reg x2, 3
check_reg x3, 4
check_reg x4, 5
check_reg x5, 6
check_reg x6, 7
check_reg x7, 8
check_reg x8, 9
check_reg x9, 10
check_reg x10, 11
check_reg x11, 12
check_reg x12, 13
check_reg x13, 14
check_reg x14, 15
ret
9:
.inst 0 // udf #0
ret
.purgem check_reg
endfunc
// void check_clobber_upper_aarch64(int, int, int, int, int, int, int, int, int, int, int);
//
// Check that the upper half of parameters that are passed as int actually
// are filled with garbage.
//
// This test has a bit of an inverted role; this test tries to verify the
// actions of the checked_call wrapper. If it finds a fault, it triggers
// a crash, to indicate a fault.
.macro check_clobber_reg reg
function check_clobber_upper_\reg\()_aarch64, export=1
lsr \reg, \reg, #32
cbnz \reg, 9f
.inst 0 // udf #0
9:
ret
endfunc
.endm
.macro check_clobber_stack arg
function check_clobber_upper_stack\arg\()_aarch64, export=1
#ifndef __APPLE__
// This assumes the stack argument layout that isn't used on Apple
// platforms. On Apple platforms, 32 bit arguments are packed tightly,
// on the stack, so there's nothing that can be clobbered - just
// return success.
ldr x0, [sp, #8*\arg]
lsr x0, x0, #32
cbnz x0, 9f
.inst 0 // udf #0
9:
#endif
ret
endfunc
.endm
.irpc r, 01234567
check_clobber_reg x\r
.endr
.irpc r, 012
check_clobber_stack \r
.endr
#endif
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