diff options
Diffstat (limited to 'qemu/roms/ipxe/src/arch/x86_64/core/setjmp.S')
| -rw-r--r-- | qemu/roms/ipxe/src/arch/x86_64/core/setjmp.S | 65 |
1 files changed, 0 insertions, 65 deletions
diff --git a/qemu/roms/ipxe/src/arch/x86_64/core/setjmp.S b/qemu/roms/ipxe/src/arch/x86_64/core/setjmp.S deleted file mode 100644 index e43200d7b..000000000 --- a/qemu/roms/ipxe/src/arch/x86_64/core/setjmp.S +++ /dev/null @@ -1,65 +0,0 @@ -FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ) - - .text - .code64 - - /* Must match jmp_buf structure layout */ - .struct 0 -env_retaddr: .quad 0 -env_stack: .quad 0 -env_rbx: .quad 0 -env_rbp: .quad 0 -env_r12: .quad 0 -env_r13: .quad 0 -env_r14: .quad 0 -env_r15: .quad 0 - .previous - -/* - * Save stack context for non-local goto - */ - .globl setjmp -setjmp: - /* Save return address */ - movq 0(%rsp), %rax - movq %rax, env_retaddr(%rdi) - /* Save stack pointer */ - movq %rsp, env_stack(%rdi) - /* Save other registers */ - movq %rbx, env_rbx(%rdi) - movq %rbp, env_rbp(%rdi) - movq %r12, env_r12(%rdi) - movq %r13, env_r13(%rdi) - movq %r14, env_r14(%rdi) - movq %r15, env_r15(%rdi) - /* Return 0 when returning as setjmp() */ - xorq %rax, %rax - ret - .size setjmp, . - setjmp - -/* - * Non-local jump to a saved stack context - */ - .globl longjmp -longjmp: - /* Get result in %rax */ - movq %rsi, %rax - /* Force result to non-zero */ - testq %rax, %rax - jnz 1f - incq %rax -1: /* Restore stack pointer */ - movq env_stack(%rdi), %rsp - /* Restore other registers */ - movq env_rbx(%rdi), %rbx - movq env_rbp(%rdi), %rbp - movq env_r12(%rdi), %r12 - movq env_r13(%rdi), %r13 - movq env_r14(%rdi), %r14 - movq env_r15(%rdi), %r15 - /* Replace return address on the new stack */ - popq %rcx /* discard */ - pushq env_retaddr(%rdi) - /* Return to setjmp() caller */ - ret - .size longjmp, . - longjmp |