Revision 11dbc963a8f6128595d0f6ecf138dc369e144997 authored by TAKADA Yoshihito on 30 June 2008, 04:44:45 UTC, committed by Ingo Molnar on 30 June 2008, 12:35:18 UTC
When I update kernel 2.6.25 from 2.6.24, gdb does not work. On 2.6.25, ptrace(PTRACE_GETFPXREGS, ...) returns ENODEV. But 2.6.24 kernel's ptrace() returns EIO. It is issue of compatibility. I attached test program as pt.c and patch for fix it. #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <signal.h> #include <errno.h> #include <sys/ptrace.h> #include <sys/types.h> struct user_fxsr_struct { unsigned short cwd; unsigned short swd; unsigned short twd; unsigned short fop; long fip; long fcs; long foo; long fos; long mxcsr; long reserved; long st_space[32]; /* 8*16 bytes for each FP-reg = 128 bytes */ long xmm_space[32]; /* 8*16 bytes for each XMM-reg = 128 bytes */ long padding[56]; }; int main(void) { pid_t pid; pid = fork(); switch(pid){ case -1:/* error */ break; case 0:/* child */ child(); break; default: parent(pid); break; } return 0; } int child(void) { ptrace(PTRACE_TRACEME); kill(getpid(), SIGSTOP); sleep(10); return 0; } int parent(pid_t pid) { int ret; struct user_fxsr_struct fpxregs; ret = ptrace(PTRACE_GETFPXREGS, pid, 0, &fpxregs); if(ret < 0){ printf("%d: %s.\n", errno, strerror(errno)); } kill(pid, SIGCONT); wait(pid); return 0; } /* in the kerel, at kernel/i387.c get_fpxregs() */ Signed-off-by: Ingo Molnar <mingo@elte.hu>
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acpi | ||
asm-alpha | ||
asm-arm | ||
asm-avr32 | ||
asm-blackfin | ||
asm-cris | ||
asm-frv | ||
asm-generic | ||
asm-h8300 | ||
asm-ia64 | ||
asm-m32r | ||
asm-m68k | ||
asm-m68knommu | ||
asm-mips | ||
asm-mn10300 | ||
asm-parisc | ||
asm-powerpc | ||
asm-ppc | ||
asm-s390 | ||
asm-sh | ||
asm-sparc | ||
asm-sparc64 | ||
asm-um | ||
asm-v850 | ||
asm-x86 | ||
asm-xtensa | ||
crypto | ||
keys | ||
linux | ||
math-emu | ||
media | ||
mtd | ||
net | ||
pcmcia | ||
rdma | ||
rxrpc | ||
scsi | ||
sound | ||
video | ||
xen | ||
Kbuild | -rw-r--r-- | 143 bytes |
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