| /* { dg-do compile } */ |
| /* { dg-options "-fstack-protector-all -mstack-protector-guard=sysreg -mstack-protector-guard-offset=16 -mstack-protector-guard-reg=tpidr_el0 -O2" } */ |
| |
| void __attribute__ ((noipa)) |
| f (void) |
| { |
| volatile int x; |
| asm volatile ("" ::: |
| "x0", "x1", "x2", "x3", "x4", "x5", "x6", "x7", |
| "x8", "x9", "x10", "x11", "x12", "x13", "x14", "x15", |
| "x16", "x17", "x18", "x19", "x20", "x21", "x22", "x23", |
| "x24", "x25", "x26", "x27", "x28", "x30"); |
| } |
| |
| /* The register clobbers above should not generate any single LDRs or STRs; |
| all registers should be saved and restored in pairs. The only LDRs and |
| STRs should be therefore be those associated with the stack protector |
| tests themselves. |
| |
| Make sure the address of the canary value (tpidr_el0 + 16) is not |
| spilled and reloaded, since that would give the attacker an opportunity |
| to change the canary value. */ |
| /* { dg-final { scan-assembler-times {\tmrs\t} 2 } } */ |
| /* { dg-final { scan-assembler-times {\tstr\t} 1 } } */ |
| /* { dg-final { scan-assembler-times {\tldr\t} 3 } } */ |
