diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux/mips/makecontext.S')
| -rw-r--r-- | sysdeps/unix/sysv/linux/mips/makecontext.S | 36 |
1 files changed, 27 insertions, 9 deletions
diff --git a/sysdeps/unix/sysv/linux/mips/makecontext.S b/sysdeps/unix/sysv/linux/mips/makecontext.S index 66600c7513..09102b708e 100644 --- a/sysdeps/unix/sysv/linux/mips/makecontext.S +++ b/sysdeps/unix/sysv/linux/mips/makecontext.S @@ -1,5 +1,5 @@ /* Modify saved context. - Copyright (C) 2009-2016 Free Software Foundation, Inc. + Copyright (C) 2009-2018 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Maciej W. Rozycki <macro@codesourcery.com>. @@ -53,6 +53,12 @@ NARGREGS = 8 A3OFF = FRAMESZ + (3 * SZREG) /* caller-allocated */ NARGREGS = 4 #endif +MCONTEXT_GREGSZ = 8 +#if _MIPS_SIM == _ABIO32 && __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ +MCONTEXT_GREGOFF = 4 +#else +MCONTEXT_GREGOFF = 0 +#endif NESTED (__makecontext, FRAMESZ, ra) .mask MASK, -(ARGSZ * SZREG) @@ -89,7 +95,8 @@ NESTED (__makecontext, FRAMESZ, ra) /* Store a magic flag. */ li v1, 1 - REG_S v1, (0 * SZREG + MCONTEXT_GREGS)(a0) /* zero */ + /* zero */ + REG_S v1, (MCONTEXT_GREGOFF + 0 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0) /* Set up the stack. */ PTR_L t0, STACK_SP(a0) @@ -100,14 +107,14 @@ NESTED (__makecontext, FRAMESZ, ra) blez a2, 2f /* no arguments */ /* Store register arguments. */ - PTR_ADDIU t2, a0, MCONTEXT_GREGS + 4 * SZREG + PTR_ADDIU t2, a0, MCONTEXT_GREGS + 4 * MCONTEXT_GREGSZ + MCONTEXT_GREGOFF move t3, zero 0: addiu t3, 1 REG_L v1, (t1) PTR_ADDIU t1, SZREG REG_S v1, (t2) - PTR_ADDIU t2, SZREG + PTR_ADDIU t2, MCONTEXT_GREGSZ bgeu t3, a2, 2f /* all done */ bltu t3, NARGREGS, 0b /* next */ @@ -138,13 +145,17 @@ NESTED (__makecontext, FRAMESZ, ra) #else PTR_LA t9, 99f #endif - REG_S t0, (29 * SZREG + MCONTEXT_GREGS)(a0) /* sp */ - REG_S v1, (16 * SZREG + MCONTEXT_GREGS)(a0) /* s0 */ + /* sp */ + REG_S t0, (MCONTEXT_GREGOFF + 29 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0) + /* s0 */ + REG_S v1, (MCONTEXT_GREGOFF + 16 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0) #ifdef __PIC__ - REG_S gp, (17 * SZREG + MCONTEXT_GREGS)(a0) /* s1 */ + /* s1 */ + REG_S gp, (MCONTEXT_GREGOFF + 17 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0) #endif - REG_S t9, (31 * SZREG + MCONTEXT_GREGS)(a0) /* ra */ - REG_S a1, MCONTEXT_PC(a0) + /* ra */ + REG_S t9, (MCONTEXT_GREGOFF + 31 * MCONTEXT_GREGSZ + MCONTEXT_GREGS)(a0) + REG_S a1, (MCONTEXT_GREGOFF + MCONTEXT_PC)(a0) #ifdef __PIC__ RESTORE_GP64_STACK @@ -153,6 +164,11 @@ NESTED (__makecontext, FRAMESZ, ra) #endif jr ra + /* We need to terminate the FDE to stop unwinding if backtrace was + called within a context created by makecontext. */ + cfi_endproc + nop + 99: #ifdef __PIC__ move gp, s1 @@ -186,6 +202,8 @@ NESTED (__makecontext, FRAMESZ, ra) 1: lb zero, (zero) b 1b + + cfi_startproc PSEUDO_END (__makecontext) weak_alias (__makecontext, makecontext) |