diff options
Diffstat (limited to 'sys/rt/amd64')
-rw-r--r-- | sys/rt/amd64/crt1.s | 21 | ||||
-rw-r--r-- | sys/rt/amd64/crti.s | 17 | ||||
-rw-r--r-- | sys/rt/amd64/crtn.s | 9 | ||||
-rw-r--r-- | sys/rt/amd64/rt1.s | 9 | ||||
-rw-r--r-- | sys/rt/amd64/rti.s | 9 | ||||
-rw-r--r-- | sys/rt/amd64/rtn.s | 7 |
6 files changed, 25 insertions, 47 deletions
diff --git a/sys/rt/amd64/crt1.s b/sys/rt/amd64/crt1.s deleted file mode 100644 index aaad0ba..0000000 --- a/sys/rt/amd64/crt1.s +++ /dev/null @@ -1,21 +0,0 @@ -global _start - -; NOTE: assumes program loader has put argc, argv, envc, envp on stack -section .text -_start: - xor rbp,rbp ; base pointer undefined: set to 0 - mov r9,rdx ; 6th arg: function to register with atexit() - pop rsi ; 2nd arg: argc - mov rdx,rsp ; 3rd arg: argv - and rsp,$-16 ; align stack pointer to 16 bytes - mov $_fini,r8 ; 5th arg: fini - mov $_init,rcx ; 4th arg: init - mov $main,rdi ; 1st arg: main - - call rt·boot ; int boot( - ; int(*main)(int,char*[],char*[]), - ; int argc, - ; char *argv[], - ; init, fini, atexit); - -.loop: jmp .loop ; should never reach... diff --git a/sys/rt/amd64/crti.s b/sys/rt/amd64/crti.s deleted file mode 100644 index eeba8b1..0000000 --- a/sys/rt/amd64/crti.s +++ /dev/null @@ -1,17 +0,0 @@ -global _init -global _fini - -section .init -_init: - ; call pushes an 8 byte return address on the stack - ; 64 bit ABI requires stack to be aligned to 16 bytes - ; we realign with another 8 byte address - push rbp - mov rbp, rsp - ;; compiler inserts the rest here - -section .fini -_fini: - push rbp ; see above - mov rbp, rsp - ;; compiler inserts the rest here diff --git a/sys/rt/amd64/crtn.s b/sys/rt/amd64/crtn.s deleted file mode 100644 index 45d1a29..0000000 --- a/sys/rt/amd64/crtn.s +++ /dev/null @@ -1,9 +0,0 @@ -section .init - ;; compiler inserts here - pop rbp ;; undo our push - ret - -section .fini - ;; compiler inserts here - pop rbp ;; undo our push - ret diff --git a/sys/rt/amd64/rt1.s b/sys/rt/amd64/rt1.s new file mode 100644 index 0000000..afb5c32 --- /dev/null +++ b/sys/rt/amd64/rt1.s @@ -0,0 +1,9 @@ +.extern rt·thunk + +.text +.global _start +_start: + xor %rbp,%rbp + mov %rsp,%rdi + andq $-16,%rsp + call rt·thunk diff --git a/sys/rt/amd64/rti.s b/sys/rt/amd64/rti.s new file mode 100644 index 0000000..4788968 --- /dev/null +++ b/sys/rt/amd64/rti.s @@ -0,0 +1,9 @@ +.section .init +.global _init +_init: + push %rax + +.section .fini +.global _fini +_fini: + push %rax diff --git a/sys/rt/amd64/rtn.s b/sys/rt/amd64/rtn.s new file mode 100644 index 0000000..29198b7 --- /dev/null +++ b/sys/rt/amd64/rtn.s @@ -0,0 +1,7 @@ +.section .init + pop %rax + ret + +.section .fini + pop %rax + ret |