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sys/amd64/linux/linux_locore.asm
| Show All 11 Lines | linux_platform: | ||||
| .asciz "x86_64" | .asciz "x86_64" | ||||
| .text | .text | ||||
| /* | /* | ||||
| * To avoid excess stack frame the signal trampoline code emulates | * To avoid excess stack frame the signal trampoline code emulates | ||||
| * the 'call' instruction. | * the 'call' instruction. | ||||
| */ | */ | ||||
| NON_GPROF_ENTRY(linux_rt_sigcode) | ENTRY(linux_rt_sigcode) | ||||
| movq %rsp, %rbx /* preserve sigframe */ | movq %rsp, %rbx /* preserve sigframe */ | ||||
| call .getip | call .getip | ||||
| .getip: | .getip: | ||||
| popq %rax | popq %rax | ||||
| add $.startrtsigcode-.getip, %rax /* ret address */ | add $.startrtsigcode-.getip, %rax /* ret address */ | ||||
| pushq %rax | pushq %rax | ||||
| jmp *LINUX_RT_SIGF_HANDLER(%rbx) | jmp *LINUX_RT_SIGF_HANDLER(%rbx) | ||||
| .startrtsigcode: | .startrtsigcode: | ||||
| movq $LINUX_SYS_linux_rt_sigreturn,%rax /* linux_rt_sigreturn() */ | movq $LINUX_SYS_linux_rt_sigreturn,%rax /* linux_rt_sigreturn() */ | ||||
| syscall /* enter kernel with args */ | syscall /* enter kernel with args */ | ||||
| hlt | hlt | ||||
| .endrtsigcode: | .endrtsigcode: | ||||
| 0: jmp 0b | 0: jmp 0b | ||||
| NON_GPROF_ENTRY(__vdso_clock_gettime) | ENTRY(__vdso_clock_gettime) | ||||
| movq $LINUX_SYS_linux_clock_gettime,%rax | movq $LINUX_SYS_linux_clock_gettime,%rax | ||||
| syscall | syscall | ||||
| ret | ret | ||||
| .weak clock_gettime | .weak clock_gettime | ||||
| .set clock_gettime, __vdso_clock_gettime | .set clock_gettime, __vdso_clock_gettime | ||||
| NON_GPROF_ENTRY(__vdso_time) | ENTRY(__vdso_time) | ||||
| movq $LINUX_SYS_linux_time,%rax | movq $LINUX_SYS_linux_time,%rax | ||||
| syscall | syscall | ||||
| ret | ret | ||||
| .weak time | .weak time | ||||
| .set time, __vdso_time | .set time, __vdso_time | ||||
| NON_GPROF_ENTRY(__vdso_gettimeofday) | ENTRY(__vdso_gettimeofday) | ||||
| movq $LINUX_SYS_gettimeofday,%rax | movq $LINUX_SYS_gettimeofday,%rax | ||||
| syscall | syscall | ||||
| ret | ret | ||||
| .weak gettimeofday | .weak gettimeofday | ||||
| .set gettimeofday, __vdso_gettimeofday | .set gettimeofday, __vdso_gettimeofday | ||||
| NON_GPROF_ENTRY(__vdso_getcpu) | ENTRY(__vdso_getcpu) | ||||
| movq $-38,%rax /* not implemented */ | movq $-38,%rax /* not implemented */ | ||||
| ret | ret | ||||
| .weak getcpu | .weak getcpu | ||||
| .set getcpu, __vdso_getcpu | .set getcpu, __vdso_getcpu | ||||
| #if 0 | #if 0 | ||||
| .section .note.Linux, "a",@note | .section .note.Linux, "a",@note | ||||
| .long 2f - 1f /* namesz */ | .long 2f - 1f /* namesz */ | ||||
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