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src/arch/arm64/core/setjmp.S
57 строк
1 KB
Geert Stappers
[build] Inhibit linker warnings about an implied executable stack
30 июн 2023, 13:05
30 июн 2023, 13:05
e17568a
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FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ) .section ".note.GNU-stack", "", %progbits .text /* Must match jmp_buf structure layout */ .struct 0 env_x19_x20: .quad 0, 0 env_x21_x22: .quad 0, 0 env_x23_x24: .quad 0, 0 env_x25_x26: .quad 0, 0 env_x27_x28: .quad 0, 0 env_x29_x30: .quad 0, 0 env_sp: .quad 0 .previous /* * Save stack context for non-local goto */ .globl setjmp .type setjmp, %function setjmp: /* Store registers */ stp x19, x20, [x0, #env_x19_x20] stp x21, x22, [x0, #env_x21_x22] stp x23, x24, [x0, #env_x23_x24] stp x25, x26, [x0, #env_x25_x26] stp x27, x28, [x0, #env_x27_x28] stp x29, x30, [x0, #env_x29_x30] mov x16, sp str x16, [x0, #env_sp] /* Return 0 when returning as setjmp() */ mov x0, #0 ret .size setjmp, . - setjmp /* * Non-local jump to a saved stack context */ .globl longjmp .type longjmp, %function longjmp: /* Restore registers */ ldp x19, x20, [x0, #env_x19_x20] ldp x21, x22, [x0, #env_x21_x22] ldp x23, x24, [x0, #env_x23_x24] ldp x25, x26, [x0, #env_x25_x26] ldp x27, x28, [x0, #env_x27_x28] ldp x29, x30, [x0, #env_x29_x30] ldr x16, [x0, #env_sp] mov sp, x16 /* Force result to non-zero */ cmp w1, #0 csinc w0, w1, w1, ne /* Return to setjmp() caller */ br x30 .size longjmp, . - longjmp