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| author | rrs <rrs@FreeBSD.org> | 2010-02-03 12:59:44 +0000 |
|---|---|---|
| committer | rrs <rrs@FreeBSD.org> | 2010-02-03 12:59:44 +0000 |
| commit | d0128a84c50db94e8efb99d95578f78e56a2f281 (patch) | |
| tree | c1b471be585a198d2eb307672fba8a6d9851bc1b /lib | |
| parent | ae135106517ff27079b2d0900337d161db755dc4 (diff) | |
| download | FreeBSD-src-d0128a84c50db94e8efb99d95578f78e56a2f281.zip FreeBSD-src-d0128a84c50db94e8efb99d95578f78e56a2f281.tar.gz | |
This fixes a bug found and fixed by JC. Basically
no save was being done of the ra and gp pointers
before we call the __error function.
Obtained from: JC (c.jayachandran@gmail.com)
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/libc/mips/sys/ptrace.S | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/lib/libc/mips/sys/ptrace.S b/lib/libc/mips/sys/ptrace.S index 86bc1e5..53ca78d 100644 --- a/lib/libc/mips/sys/ptrace.S +++ b/lib/libc/mips/sys/ptrace.S @@ -42,14 +42,26 @@ __FBSDID("$FreeBSD$"); #endif /* LIBC_SCCS and not lint */ LEAF(ptrace) + .frame sp,40,ra + .mask 0x80000000, -8 #ifdef __ABICALLS__ .set noreorder .cpload t9 .set reorder #endif + subu sp, sp, 40 + sw ra, 32(sp) +#ifdef __ABICALLS__ + .cprestore 16 +#endif la t9, _C_LABEL(__error) # locate address of errno - jalr t9 + jalr t9 +#ifdef __ABICALLS__ + lw gp, 16(sp) +#endif sw zero, 0(v0) + lw ra, 32(sp) + addu sp, sp, 40 li v0, SYS_ptrace syscall bne a3, zero, 1f |
