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X-Received-From: 2a00:1450:400c:c0c::22b Subject: [Qemu-devel] [RISU PATCH v4 06/10] risu: add header to trace stream X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?UTF-8?q?Alex=20Benn=C3=A9e?= , qemu-devel@nongnu.org Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZohoMail: RDKM_2 RSF_0 Z_629925259 SPT_0 I've also added a header packet with pc/risu op in it so we can keep better track of how things are going. Signed-off-by: Alex Benn=C3=A9e --- v4 - split from previous patch --- reginfo.c | 103 +++++++++++++++++++++++++++++++++++++----------------= ---- risu.h | 9 +++++ risu_aarch64.c | 5 +++ risu_arm.c | 5 +++ risu_m68k.c | 5 +++ risu_ppc64.c | 5 +++ 6 files changed, 96 insertions(+), 36 deletions(-) diff --git a/reginfo.c b/reginfo.c index 6498459..be7bcdb 100644 --- a/reginfo.c +++ b/reginfo.c @@ -24,10 +24,20 @@ static int packet_mismatch =3D 0; int send_register_info(write_fn write_fn, void *uc) { struct reginfo ri; + trace_header_t header; int op; + reginfo_init(&ri, uc); op =3D get_risuop(&ri); =20 + /* Write a header with PC/op to keep in sync */ + header.pc =3D get_pc(&ri); + header.risu_op =3D op; + if (write_fn(&header, sizeof(header)) !=3D 0) { + fprintf(stderr,"%s: failed header write\n", __func__); + return -1; + } + switch (op) { case OP_TESTEND: write_fn(&ri, sizeof(ri)); @@ -63,51 +73,72 @@ int send_register_info(write_fn write_fn, void *uc) int recv_and_compare_register_info(read_fn read_fn, respond_fn resp_fn, vo= id *uc) { int resp =3D 0, op; + trace_header_t header; =20 reginfo_init(&master_ri, uc); op =3D get_risuop(&master_ri); =20 - switch (op) { - case OP_COMPARE: - case OP_TESTEND: - default: - /* Do a simple register compare on (a) explicit request - * (b) end of test (c) a non-risuop UNDEF - */ - if (read_fn(&apprentice_ri, sizeof(apprentice_ri))) { - packet_mismatch =3D 1; - resp =3D 2; - } else if (!reginfo_is_eq(&master_ri, &apprentice_ri)) { - /* register mismatch */ - resp =3D 2; - } else if (op =3D=3D OP_TESTEND) { - resp =3D 1; - } - resp_fn(resp); - break; - case OP_SETMEMBLOCK: - memblock =3D (void *)(uintptr_t)get_reginfo_paramreg(&master_ri); - break; - case OP_GETMEMBLOCK: - set_ucontext_paramreg(uc, get_reginfo_paramreg(&master_ri) + - (uintptr_t)memblock); - break; - case OP_COMPAREMEM: - mem_used =3D 1; - if (read_fn(apprentice_memblock, MEMBLOCKLEN)) { - packet_mismatch =3D 1; - resp =3D 2; - } else if (memcmp(memblock, apprentice_memblock, MEMBLOCKLEN) != =3D 0) { - /* memory mismatch */ - resp =3D 2; - } - resp_fn(resp); - break; + if (read_fn(&header, sizeof(header)) !=3D 0) { + fprintf(stderr,"%s: failed header read\n", __func__); + return -1; + } + + if (header.risu_op =3D=3D op ) { + + /* send OK for the header */ + resp_fn(0); + + switch (op) { + case OP_COMPARE: + case OP_TESTEND: + default: + /* Do a simple register compare on (a) explicit request + * (b) end of test (c) a non-risuop UNDEF + */ + if (read_fn(&apprentice_ri, sizeof(apprentice_ri))) { + packet_mismatch =3D 1; + resp =3D 2; + + } else if (!reginfo_is_eq(&master_ri, &apprentice_ri)) { + /* register mismatch */ + resp =3D 2; + + } else if (op =3D=3D OP_TESTEND) { + resp =3D 1; + } + resp_fn(resp); + break; + case OP_SETMEMBLOCK: + memblock =3D (void *)(uintptr_t)get_reginfo_paramreg(&master_r= i); + break; + case OP_GETMEMBLOCK: + set_ucontext_paramreg(uc, get_reginfo_paramreg(&master_ri) + + (uintptr_t)memblock); + break; + case OP_COMPAREMEM: + mem_used =3D 1; + if (read_fn(apprentice_memblock, MEMBLOCKLEN)) { + packet_mismatch =3D 1; + resp =3D 2; + } else if (memcmp(memblock, apprentice_memblock, MEMBLOCKLEN) = !=3D 0) { + /* memory mismatch */ + resp =3D 2; + } + resp_fn(resp); + break; + } + } else { + fprintf(stderr, "out of sync %" PRIxPTR "/%" PRIxPTR " %d/%d\n", + get_pc(&master_ri), header.pc, + op, header.risu_op); + resp =3D 2; + resp_fn(resp); } =20 return resp; } =20 + /* Print a useful report on the status of the last comparison * done in recv_and_compare_register_info(). This is called on * exit, so need not restrict itself to signal-safe functions. diff --git a/risu.h b/risu.h index 71ea94f..c01a9c3 100644 --- a/risu.h +++ b/risu.h @@ -51,6 +51,12 @@ extern int ismaster; =20 struct reginfo; =20 +typedef struct +{ + uintptr_t pc; + uint32_t risu_op; +} trace_header_t; + /* Functions operating on reginfo */ =20 /* To keep the read/write logic from multiplying across all arches @@ -102,6 +108,9 @@ uint64_t get_reginfo_paramreg(struct reginfo *ri); */ int get_risuop(struct reginfo *ri); =20 +/* Return the PC from a reginfo */ +uintptr_t get_pc(struct reginfo *ri); + /* initialize structure from a ucontext */ void reginfo_init(struct reginfo *ri, ucontext_t *uc); =20 diff --git a/risu_aarch64.c b/risu_aarch64.c index 5625979..312bd6a 100644 --- a/risu_aarch64.c +++ b/risu_aarch64.c @@ -43,3 +43,8 @@ int get_risuop(struct reginfo *ri) uint32_t risukey =3D 0x00005af0; return (key !=3D risukey) ? -1 : op; } + +uintptr_t get_pc(struct reginfo *ri) +{ + return ri->pc; +} diff --git a/risu_arm.c b/risu_arm.c index eaf4f6c..a61256b 100644 --- a/risu_arm.c +++ b/risu_arm.c @@ -73,3 +73,8 @@ int get_risuop(struct reginfo *ri) uint32_t risukey =3D (isz =3D=3D 2) ? 0xdee0 : 0xe7fe5af0; return (key !=3D risukey) ? -1 : op; } + +uintptr_t get_pc(struct reginfo *ri) +{ + return ri->gpreg[15]; +} diff --git a/risu_m68k.c b/risu_m68k.c index f84ac7a..35b3c03 100644 --- a/risu_m68k.c +++ b/risu_m68k.c @@ -33,3 +33,8 @@ int get_risuop(struct reginfo *ri) uint32_t risukey =3D 0x4afc7000; return (key !=3D risukey) ? -1 : op; } + +uintptr_t get_pc(struct reginfo *ri) +{ + return ri->gregs[R_PC]; +} diff --git a/risu_ppc64.c b/risu_ppc64.c index b575078..e702a00 100644 --- a/risu_ppc64.c +++ b/risu_ppc64.c @@ -38,3 +38,8 @@ int get_risuop(struct reginfo *ri) uint32_t risukey =3D 0x00005af0; return (key !=3D risukey) ? -1 : op; } + +uintptr_t get_pc(struct reginfo *ri) +{ + return ri->nip; +} --=20 2.13.0