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Diffstat (limited to 'src/runtime/sys_linux_386.s')
-rw-r--r--src/runtime/sys_linux_386.s96
1 files changed, 48 insertions, 48 deletions
diff --git a/src/runtime/sys_linux_386.s b/src/runtime/sys_linux_386.s
index d26b25e987..98626d14c8 100644
--- a/src/runtime/sys_linux_386.s
+++ b/src/runtime/sys_linux_386.s
@@ -10,23 +10,17 @@
#include "go_tls.h"
#include "textflag.h"
-#ifdef GOBUILDMODE_shared
-#define INVOKE_SYSINFO CALL 0x10(GS)
-#else
-#define INVOKE_SYSINFO CALL *runtime·_vdso(SB)
-#endif
-
TEXT runtime·exit(SB),NOSPLIT,$0
MOVL $252, AX // syscall number
MOVL code+0(FP), BX
- INVOKE_SYSINFO
+ CALL 0x10(GS)
INT $3 // not reached
RET
TEXT runtime·exit1(SB),NOSPLIT,$0
MOVL $1, AX // exit - exit the current os thread
MOVL code+0(FP), BX
- INVOKE_SYSINFO
+ CALL 0x10(GS)
INT $3 // not reached
RET
@@ -35,7 +29,7 @@ TEXT runtime·open(SB),NOSPLIT,$0
MOVL name+0(FP), BX
MOVL mode+4(FP), CX
MOVL perm+8(FP), DX
- INVOKE_SYSINFO
+ CALL 0x10(GS)
CMPL AX, $0xfffff001
JLS 2(PC)
MOVL $-1, AX
@@ -45,7 +39,7 @@ TEXT runtime·open(SB),NOSPLIT,$0
TEXT runtime·closefd(SB),NOSPLIT,$0
MOVL $6, AX // syscall - close
MOVL fd+0(FP), BX
- INVOKE_SYSINFO
+ CALL 0x10(GS)
CMPL AX, $0xfffff001
JLS 2(PC)
MOVL $-1, AX
@@ -57,7 +51,7 @@ TEXT runtime·write(SB),NOSPLIT,$0
MOVL fd+0(FP), BX
MOVL p+4(FP), CX
MOVL n+8(FP), DX
- INVOKE_SYSINFO
+ CALL 0x10(GS)
CMPL AX, $0xfffff001
JLS 2(PC)
MOVL $-1, AX
@@ -69,7 +63,7 @@ TEXT runtime·read(SB),NOSPLIT,$0
MOVL fd+0(FP), BX
MOVL p+4(FP), CX
MOVL n+8(FP), DX
- INVOKE_SYSINFO
+ CALL 0x10(GS)
CMPL AX, $0xfffff001
JLS 2(PC)
MOVL $-1, AX
@@ -80,7 +74,7 @@ TEXT runtime·getrlimit(SB),NOSPLIT,$0
MOVL $191, AX // syscall - ugetrlimit
MOVL kind+0(FP), BX
MOVL limit+4(FP), CX
- INVOKE_SYSINFO
+ CALL 0x10(GS)
MOVL AX, ret+8(FP)
RET
@@ -99,31 +93,31 @@ TEXT runtime·usleep(SB),NOSPLIT,$8
MOVL $0, DX
MOVL $0, SI
LEAL 0(SP), DI
- INVOKE_SYSINFO
+ CALL 0x10(GS)
RET
TEXT runtime·gettid(SB),NOSPLIT,$0-4
MOVL $224, AX // syscall - gettid
- INVOKE_SYSINFO
+ CALL 0x10(GS)
MOVL AX, ret+0(FP)
RET
TEXT runtime·raise(SB),NOSPLIT,$12
MOVL $224, AX // syscall - gettid
- INVOKE_SYSINFO
+ CALL 0x10(GS)
MOVL AX, BX // arg 1 tid
MOVL sig+0(FP), CX // arg 2 signal
MOVL $238, AX // syscall - tkill
- INVOKE_SYSINFO
+ CALL 0x10(GS)
RET
TEXT runtime·raiseproc(SB),NOSPLIT,$12
MOVL $20, AX // syscall - getpid
- INVOKE_SYSINFO
+ CALL 0x10(GS)
MOVL AX, BX // arg 1 pid
MOVL sig+0(FP), CX // arg 2 signal
MOVL $37, AX // syscall - kill
- INVOKE_SYSINFO
+ CALL 0x10(GS)
RET
TEXT runtime·setitimer(SB),NOSPLIT,$0-12
@@ -131,7 +125,7 @@ TEXT runtime·setitimer(SB),NOSPLIT,$0-12
MOVL mode+0(FP), BX
MOVL new+4(FP), CX
MOVL old+8(FP), DX
- INVOKE_SYSINFO
+ CALL 0x10(GS)
RET
TEXT runtime·mincore(SB),NOSPLIT,$0-16
@@ -139,7 +133,7 @@ TEXT runtime·mincore(SB),NOSPLIT,$0-16
MOVL addr+0(FP), BX
MOVL n+4(FP), CX
MOVL dst+8(FP), DX
- INVOKE_SYSINFO
+ CALL 0x10(GS)
MOVL AX, ret+12(FP)
RET
@@ -149,7 +143,7 @@ TEXT time·now(SB), NOSPLIT, $32
MOVL $0, BX // CLOCK_REALTIME
LEAL 8(SP), CX
MOVL $0, DX
- INVOKE_SYSINFO
+ CALL 0x10(GS)
MOVL 8(SP), AX // sec
MOVL 12(SP), BX // nsec
@@ -166,7 +160,7 @@ TEXT runtime·nanotime(SB), NOSPLIT, $32
MOVL $1, BX // CLOCK_MONOTONIC
LEAL 8(SP), CX
MOVL $0, DX
- INVOKE_SYSINFO
+ CALL 0x10(GS)
MOVL 8(SP), AX // sec
MOVL 12(SP), BX // nsec
@@ -187,7 +181,7 @@ TEXT runtime·rtsigprocmask(SB),NOSPLIT,$0
MOVL new+4(FP), CX
MOVL old+8(FP), DX
MOVL size+12(FP), SI
- INVOKE_SYSINFO
+ CALL 0x10(GS)
CMPL AX, $0xfffff001
JLS 2(PC)
INT $3
@@ -199,7 +193,7 @@ TEXT runtime·rt_sigaction(SB),NOSPLIT,$0
MOVL new+4(FP), CX
MOVL old+8(FP), DX
MOVL size+12(FP), SI
- INVOKE_SYSINFO
+ CALL 0x10(GS)
MOVL AX, ret+16(FP)
RET
@@ -227,9 +221,9 @@ TEXT runtime·sigtramp(SB),NOSPLIT,$12
TEXT runtime·sigreturn(SB),NOSPLIT,$0
MOVL $173, AX // rt_sigreturn
// Sigreturn expects same SP as signal handler,
- // so cannot CALL *runtime._vsdo(SB) here.
+ // so cannot CALL 0x10(GS) here.
INT $0x80
- INT $3 // not reached
+ INT $3 // not reached
RET
TEXT runtime·mmap(SB),NOSPLIT,$0
@@ -241,7 +235,7 @@ TEXT runtime·mmap(SB),NOSPLIT,$0
MOVL fd+16(FP), DI
MOVL off+20(FP), BP
SHRL $12, BP
- INVOKE_SYSINFO
+ CALL 0x10(GS)
CMPL AX, $0xfffff001
JLS 3(PC)
NOTL AX
@@ -253,7 +247,7 @@ TEXT runtime·munmap(SB),NOSPLIT,$0
MOVL $91, AX // munmap
MOVL addr+0(FP), BX
MOVL n+4(FP), CX
- INVOKE_SYSINFO
+ CALL 0x10(GS)
CMPL AX, $0xfffff001
JLS 2(PC)
INT $3
@@ -264,7 +258,7 @@ TEXT runtime·madvise(SB),NOSPLIT,$0
MOVL addr+0(FP), BX
MOVL n+4(FP), CX
MOVL flags+8(FP), DX
- INVOKE_SYSINFO
+ CALL 0x10(GS)
// ignore failure - maybe pages are locked
RET
@@ -278,7 +272,7 @@ TEXT runtime·futex(SB),NOSPLIT,$0
MOVL ts+12(FP), SI
MOVL addr2+16(FP), DI
MOVL val3+20(FP), BP
- INVOKE_SYSINFO
+ CALL 0x10(GS)
MOVL AX, ret+24(FP)
RET
@@ -300,10 +294,9 @@ TEXT runtime·clone(SB),NOSPLIT,$0
MOVL SI, 8(CX)
MOVL $1234, 12(CX)
- // cannot use CALL *runtime·_vdso(SB) here, because
- // the stack changes during the system call (after
- // CALL *runtime·_vdso(SB), the child is still using
- // the parent's stack when executing its RET instruction).
+ // cannot use CALL 0x10(GS) here, because the stack changes during the
+ // system call (after CALL 0x10(GS), the child is still using the
+ // parent's stack when executing its RET instruction).
INT $0x80
// In parent, return.
@@ -320,7 +313,7 @@ TEXT runtime·clone(SB),NOSPLIT,$0
// Initialize AX to Linux tid
MOVL $224, AX
- INVOKE_SYSINFO
+ CALL 0x10(GS)
MOVL 0(SP), BX // m
MOVL 4(SP), DX // g
@@ -371,7 +364,7 @@ TEXT runtime·sigaltstack(SB),NOSPLIT,$-8
MOVL $186, AX // sigaltstack
MOVL new+4(SP), BX
MOVL old+8(SP), CX
- INVOKE_SYSINFO
+ CALL 0x10(GS)
CMPL AX, $0xfffff001
JLS 2(PC)
INT $3
@@ -429,6 +422,12 @@ TEXT runtime·setldt(SB),NOSPLIT,$32
ADDL $0x4, CX // address
MOVL CX, 0(CX)
#endif
+ // We copy the dynamic linker behaviour of storing the vsyscall entry point
+ // at 0x10(GS) so that it can be invoked by "CALL 0x10(GS)" in all
+ // situations, not only those where the binary is actually dynamically
+ // linked.
+ MOVL runtime·_vdso(SB), AX
+ MOVL AX, 0x10(CX)
// set up user_desc
LEAL 16(SP), AX // struct user_desc
@@ -442,7 +441,8 @@ TEXT runtime·setldt(SB),NOSPLIT,$32
MOVL AX, CX // user_desc
MOVL $16, DX // sizeof(user_desc)
MOVL $123, AX // syscall - modify_ldt
- INVOKE_SYSINFO
+ // We can't call this via 0x10(GS) because this is called from setldt0 to set that up.
+ INT $0x80
// breakpoint on error
CMPL AX, $0xfffff001
@@ -459,7 +459,7 @@ TEXT runtime·setldt(SB),NOSPLIT,$32
TEXT runtime·osyield(SB),NOSPLIT,$0
MOVL $158, AX
- INVOKE_SYSINFO
+ CALL 0x10(GS)
RET
TEXT runtime·sched_getaffinity(SB),NOSPLIT,$0
@@ -467,7 +467,7 @@ TEXT runtime·sched_getaffinity(SB),NOSPLIT,$0
MOVL pid+0(FP), BX
MOVL len+4(FP), CX
MOVL buf+8(FP), DX
- INVOKE_SYSINFO
+ CALL 0x10(GS)
MOVL AX, ret+12(FP)
RET
@@ -475,7 +475,7 @@ TEXT runtime·sched_getaffinity(SB),NOSPLIT,$0
TEXT runtime·epollcreate(SB),NOSPLIT,$0
MOVL $254, AX
MOVL size+0(FP), BX
- INVOKE_SYSINFO
+ CALL 0x10(GS)
MOVL AX, ret+4(FP)
RET
@@ -483,7 +483,7 @@ TEXT runtime·epollcreate(SB),NOSPLIT,$0
TEXT runtime·epollcreate1(SB),NOSPLIT,$0
MOVL $329, AX
MOVL flags+0(FP), BX
- INVOKE_SYSINFO
+ CALL 0x10(GS)
MOVL AX, ret+4(FP)
RET
@@ -494,7 +494,7 @@ TEXT runtime·epollctl(SB),NOSPLIT,$0
MOVL op+4(FP), CX
MOVL fd+8(FP), DX
MOVL ev+12(FP), SI
- INVOKE_SYSINFO
+ CALL 0x10(GS)
MOVL AX, ret+16(FP)
RET
@@ -505,7 +505,7 @@ TEXT runtime·epollwait(SB),NOSPLIT,$0
MOVL ev+4(FP), CX
MOVL nev+8(FP), DX
MOVL timeout+12(FP), SI
- INVOKE_SYSINFO
+ CALL 0x10(GS)
MOVL AX, ret+16(FP)
RET
@@ -515,7 +515,7 @@ TEXT runtime·closeonexec(SB),NOSPLIT,$0
MOVL fd+0(FP), BX // fd
MOVL $2, CX // F_SETFD
MOVL $1, DX // FD_CLOEXEC
- INVOKE_SYSINFO
+ CALL 0x10(GS)
RET
// int access(const char *name, int mode)
@@ -523,7 +523,7 @@ TEXT runtime·access(SB),NOSPLIT,$0
MOVL $33, AX // syscall - access
MOVL name+0(FP), BX
MOVL mode+4(FP), CX
- INVOKE_SYSINFO
+ CALL 0x10(GS)
MOVL AX, ret+8(FP)
RET
@@ -534,7 +534,7 @@ TEXT runtime·connect(SB),NOSPLIT,$0-16
MOVL $102, AX // syscall - socketcall
MOVL $3, BX // connect
LEAL fd+0(FP), CX
- INVOKE_SYSINFO
+ CALL 0x10(GS)
MOVL AX, ret+12(FP)
RET
@@ -545,6 +545,6 @@ TEXT runtime·socket(SB),NOSPLIT,$0-16
MOVL $102, AX // syscall - socketcall
MOVL $1, BX // socket
LEAL domain+0(FP), CX
- INVOKE_SYSINFO
+ CALL 0x10(GS)
MOVL AX, ret+12(FP)
RET
generated by cgit v1.3 (git 2.53.0) at 2026-04-16 00:49:24 +0000