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authorChuck Ebbert <76306.1226@compuserve.com>2006-01-05 23:11:29 -0500
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-05 20:50:51 -0800
commit9f155b9802bb7049cd0f216c3fe903b58620df11 (patch)
treed83fa1699e8113d83588d38a1c16e68cd3fcf462 /Documentation/kbuild
parent29552b1462799afbe02af035b243e97579d63350 (diff)
[PATCH] i386: PTRACE_POKEUSR: allow changing RF bit in EFLAGS register.
Setting RF (resume flag) allows a debugger to resume execution after a code breakpoint without tripping the breakpoint again. It is reset by the CPU after execution of one instruction. Requested by Stephane Eranian: "I am trying to the user HW debug registers on i386 and I am running into a problem with ptrace() not allowing access to EFLAGS_RF for POKEUSER (see FLAG_MASK). [ ... ] It avoids the need to remove the breakpoint, single step, and reinstall. The equivalent functionality exists on IA-64 and is allowed by ptrace()" Cc: Stephane Eranian <eranian@hpl.hp.com> Signed-off-by: Chuck Ebbert <76306.1226@compuserve.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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